CN117321349A

CN117321349A - Computing device, computing method, program, control device, control method, and control program

Info

Publication number: CN117321349A
Application number: CN202280030217.XA
Authority: CN
Inventors: 大茂昌史; 崔林日; 坂井正颂; 山口徹; 上田宪治
Original assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Current assignee: Mitsubishi Heavy Industries Thermal Systems Ltd
Priority date: 2021-05-06
Filing date: 2022-02-10
Publication date: 2023-12-29
Also published as: WO2022234706A1; JP2022172642A; KR20230164712A; JP7136965B1

Abstract

The calculation device of the present disclosure determines a heat storage mode when heat is stored by a geothermal heat utilization system, the geothermal heat utilization system comprising: a heat source well device; and a heat storage auxiliary device having a cooling tower, a refrigerator, and a refrigerant circuit, wherein the computing device includes: an acquisition unit that acquires a simulation condition; a first calculation unit that calculates a first simulation result that is a result of a simulation of a first heat storage mode including heat storage by the cooling tower, based on the simulation conditions; a second calculation unit that calculates a second simulation result that is a result of a simulation of a second heat storage mode including heat storage by the refrigerator, based on the simulation conditions; and a determination unit that determines one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

Description

Computing device, computing method, program, control device, control method, and control program

Technical Field

The present disclosure relates to a computing device, a computing method, a program, a control device, a control method, and a control program.

The present application claims priority from japanese patent application No. 2021-78637 filed 5/6 of 2021, the contents of which are incorporated herein by reference.

Background

In recent years, geothermal energy utilization systems using groundwater as a warm heat source or a cold heat source have been proposed.

For example, patent document 1 proposes a geothermal energy utilization system including: a heat source well device having a warm water well, a cold water well, and a well-side piping connecting them; and a heat source unit having a refrigeration cycle including a condenser and an evaporator. In this geothermal energy utilization system, the cold and hot storage operation mode and the hot and cold discharge operation mode can be switched according to seasons. In the cold-heat storage operation mode, heat is exchanged between the evaporator of the heat source unit and the well-side piping, and heat is exchanged between the condenser of the heat source unit and the load. In the cooling/heating operation mode, heat is exchanged between the condenser of the heat source unit and the well-side piping, and heat is exchanged between the evaporator of the heat source unit and the load.

Prior art literature

Patent literature

Patent document 1: japanese patent application laid-open No. 2018-173257

Disclosure of Invention

Problems to be solved by the invention

In the geothermal energy utilization system as described in patent document 1, it is desirable to always perform more efficient operation. For example, environmental conditions such as air temperature and humidity change every day. Therefore, it is preferable to operate the geothermal energy utilization system in a more appropriate operation mode in accordance with not only seasons such as summer and winter but also conditions during operation.

The present disclosure has been made to solve the above-described problems, and an object thereof is to provide a computing device, a computing method, a program, a control device, a control method, and a control program that can operate in a thermal storage mode that matches environmental conditions.

Technical proposal

In order to solve the above-described problems, a computing device of the present disclosure determines a heat storage mode when heat is stored by a geothermal utilization system including: a heat source well device including a warm water well, a cold water well, a well-side pipe connecting the Wen Shuijing and the cold water well, and a pump provided in the well-side pipe; and a heat storage auxiliary device including a cooling tower, a refrigerator, and a refrigerant circuit connected to at least one of the cooling tower and the refrigerator and capable of exchanging heat with the well-side piping, wherein the computing device includes: an acquisition unit that acquires a simulation condition; a first calculation unit that calculates a first simulation result that is a result of a simulation of a first heat storage mode including heat storage by the cooling tower, based on the simulation condition; a second calculation unit that calculates a second simulation result that is a result of a simulation of a second heat storage mode including heat storage achieved by the refrigerator, based on the simulation condition; and a determination unit configured to determine either one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

The calculation method of the present disclosure determines a heat storage mode when heat is stored by a geothermal energy utilization system including: a heat source well device including a warm water well, a cold water well, a well-side pipe connecting the Wen Shuijing and the cold water well, and a pump provided in the well-side pipe; and a heat storage auxiliary device having a cooling tower, a refrigerator, and a refrigerant circuit connected to at least one of the cooling tower and the refrigerator and capable of performing heat exchange with the well-side piping, wherein in the calculation method, a simulated condition is acquired; calculating a first simulation result based on the simulation conditions, the first simulation result being a result of a simulation of a first heat storage mode including heat storage achieved by the cooling tower; calculating a second simulation result based on the simulation conditions, the second simulation result being a result of a simulation of a second heat storage mode including heat storage achieved by the refrigerator; and determining any one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

The program of the present disclosure causes a computer to execute a method of determining a heat storage mode when heat is stored by a geothermal utilization system including: a heat source well device including a warm water well, a cold water well, a well-side pipe connecting the Wen Shuijing and the cold water well, and a pump provided in the well-side pipe; and a heat storage auxiliary device having a cooling tower, a refrigerator, and a refrigerant circuit connected to at least one of the cooling tower and the refrigerator and capable of performing heat exchange with the well-side piping, wherein in the method, simulated conditions are obtained; calculating a first simulation result based on the simulation conditions, the first simulation result being a result of a simulation of a first heat storage mode including heat storage achieved by the cooling tower; calculating a second simulation result based on the simulation conditions, the second simulation result being a result of a simulation of a second heat storage mode including heat storage achieved by the refrigerator; and determining any one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

Effects of the invention

According to the computing device, the computing method, the program, the control device, the control method, and the control program of the present disclosure, the operation can be performed in the heat storage mode matched with the environmental condition.

Drawings

Fig. 1 is a system diagram showing a schematic configuration of a geothermal utilization system according to an embodiment of the present disclosure.

Fig. 2 is a block diagram showing a functional configuration of the geothermal utilization system according to the embodiment of the present disclosure.

Fig. 3 is a diagram showing the flow of groundwater and medium in the case of performing the operation in the cooling operation mode in the geothermal utilization system according to the embodiment of the present disclosure.

Fig. 4 is a diagram showing the flow of groundwater and medium in the case of performing the operation in the heating operation mode in the geothermal utilization system according to the embodiment of the present disclosure.

Fig. 5 is a diagram showing the flow of groundwater and medium in the case of performing the cold water heat storage operation in the first heat storage mode in the geothermal energy utilization system according to the embodiment of the present disclosure.

Fig. 6 is a diagram showing the flow of groundwater and medium in the case of performing the cold water heat storage operation in the second heat storage mode in the geothermal energy utilization system according to the embodiment of the present disclosure.

Fig. 7 is a flowchart showing a flow of a calculation method of the embodiment of the present disclosure.

Fig. 8 is a flowchart showing a flow of a control method according to an embodiment of the present disclosure.

Fig. 9 is a diagram showing an example of a hardware configuration of a computer provided in each of the computing device and the control device according to the embodiment of the present disclosure.

Detailed Description

Embodiments of the present disclosure will be described below with reference to the drawings. In all the drawings, the same or corresponding components are denoted by the same reference numerals, and common descriptions are omitted.

< embodiment >

Embodiments of the geothermal utilization system of the present disclosure will be described with reference to fig. 1 to 8.

(constitution of geothermal utilization System)

As shown in fig. 1 and 2, the geothermal utilization system 1 mainly includes a heat source well device 10, a heat storage auxiliary device 100, a heat exchanger 4 (see fig. 1), a computing device 200 (see fig. 2), and a control device 300 (see fig. 2).

(constitution of Heat Source well Equipment)

As shown in fig. 1, the heat source well equipment 10 mainly includes a warm water well 21, a cold water well 22, a well-side pipe 3, and a pump 31.

Wen Shuijing 21 and cold water wells 22 extend from the surface into the water-bearing layer, respectively.

Wen Shuijing 21 and the cold water well 22 are respectively configured to be able to take in groundwater in the aquifer, or to be able to return groundwater from the inside of the warm water well 21 and the cold water well 22 to the aquifer.

The heat source well equipment 10 draws groundwater from one of the hot water well 21 and the cold water well 22, exchanges heat in the heat exchanger 4, and then injects the groundwater after the heat exchange into the other of the hot water well Wen Shuijing and the cold water well 22. That is, the heat source well equipment 10 has two operation modes, that is, an operation mode in the case where groundwater is drawn from the warm water well 21 and injected into the cold water well 22 and an operation mode in the case where groundwater is drawn from the cold water well 22 and injected into the warm water well 21.

The well-side piping 3 connects the warm water well 21 and the cold water well 22.

Both ends of the well-side piping 3 extend into the warm water well 21 and the cold water well 22.

For example, the well-side piping 3 may be immersed in each of the groundwater in the warm water well 21 and the cold water well 22 at both ends thereof to connect the warm water well 21 and the cold water well 22.

The well-side pipe 3 is provided with a pump 31.

The pumps 31 are provided at both ends of the well-side piping 3.

The pump 31 pumps water from the hot water well 21 and the cold water well 22 to the well-side pipe 3.

For example, the pump 31 may be provided at both ends of the well-side piping 3 and immersed in groundwater in the hot water well 21 and the cold water well 22.

For example, the pump 31 may be configured to change the output by inverter control.

The heat exchanger 4 exchanges heat between the groundwater in the well side piping 3 and the medium on the side of the heat storage auxiliary device 100.

For example, the heat exchanger 4 exchanges heat between groundwater drawn from the warm water well 21 and flowing in the well-side piping 3 and a medium on the side of the heat storage auxiliary device 100. The groundwater subjected to heat exchange flows from the heat exchanger 4 into the well-side piping 3 and is injected into the cold water well 22.

For example, the heat exchanger 4 exchanges heat between groundwater drawn from the cold water well 22 and flowing in the well side piping 3 and a medium on the side of the heat storage auxiliary device 100. The groundwater subjected to heat exchange flows from the heat exchanger 4 into the well-side piping 3 and is injected into the warm water well 21.

For example, the heat exchanger 4 may be provided at the middle of the well-side piping 3 at the surface.

When the water passing through the heat exchanger 4 is warm water, warm water is stored in the warm water well 21.

When the water passing through the heat exchanger 4 is cold water, cold water is stored in the cold water well 22.

Here, "hot water" refers to water having a temperature higher than the initial ground temperature of the groundwater in the aquifer, and "cold water" refers to water having a temperature lower than the initial ground temperature of the groundwater in the aquifer.

For example, the initial groundwater temperature of the aquifer is 18 ℃.

(constitution of Heat storage auxiliary Equipment)

The heat storage auxiliary device 100 uses a medium that exchanges heat with the groundwater in the well-side piping 3 in the heat exchanger 4.

The heat storage auxiliary device 100 includes at least a cooling tower 130, a heat source unit 110, and a refrigerant circuit 101.

In the present embodiment, the heat storage auxiliary device 100 includes, for example, a heat source unit 110, an air conditioner 120, a cooling tower 130, and a refrigerant circuit 101.

The heat storage auxiliary device 100 may constitute an air conditioning system including, for example, the heat source unit 110 and the air conditioner 120.

For example, the heat source unit 110 may be a heat pump including a condenser, an evaporator, a compressor, and the like.

The air conditioner 120 performs air conditioning of the space in which the air conditioner 120 is installed by exchanging heat with the medium (cold water) supplied from the heat source unit 110.

The cooling tower 130 cools the cooling water by the vaporization heat generated when the cooling water is brought into contact with the atmosphere and vaporized. The cooling tower 130 circulates cooling water between the cooling tower 130 and the second heat exchanger 140.

The second heat exchanger 140 exchanges heat with the medium (cooling water) of the refrigerant circuit 101 on the air conditioning system side and the cooling water on the cooling tower 130 side.

The second heat exchanger 140 cools the medium of the air conditioning system-side refrigerant circuit 101 by heat exchange with the cooling water cooled in the cooling tower 130.

The refrigerator 150 is constituted by the heat source unit 110 and the cooling tower 130.

The refrigerant circuit 101 forms a flow path for a medium among the heat exchanger 4, the heat source unit 110, the air conditioner 120, and the second heat exchanger 140.

The refrigerant circuit 101 is appropriately provided with a pump, an on-off valve, and the like, not shown, and circulates a medium in a predetermined path between the heat exchanger 4, the heat source unit 110, the air conditioner 120, and the second heat exchanger 140 according to the operation mode.

For example, the heat storage assist device 100 can switch the operation mode between the cooling operation mode and the heating operation mode by switching the circulation path of the medium in the refrigerant circuit 101.

(construction of cooling operation mode)

As shown in fig. 3, in the cooling operation mode, the cooling operation is performed on the heat storage auxiliary device 100 side, and warm water is stored in the warm water well 21. In this case, the pump 31 of the cold water well 22 draws in groundwater and feeds the heat exchanger 4. The heat exchanger 4 exchanges heat between the groundwater in the well-side piping 3 and the medium flowing in the refrigerant circuit 101 on the side of the heat storage auxiliary device 100. On the heat storage auxiliary device 100 side, the medium (cooling water) cooled by the heat exchange in the heat exchanger 4 is sent to the heat source unit 110, and heat exchange is performed between the heat source unit 110 and the medium (cold water) on the air conditioner 120 side. Thereby, the air conditioner 120 connected to the heat source unit 110 can perform indoor cooling. On the other hand, the medium (cooling water) heated by the heat exchange in the heat source unit 110 is sent again to the heat exchanger 4 and is circulated after being cooled. In the heat exchanger 4, the heated medium exchanges heat with the groundwater flowing in the well-side piping 3, thereby heating the groundwater. The heated groundwater is injected into the warm water well 21 through the well side piping 3, whereby warm water is stored.

(construction of heating operation mode)

As shown in fig. 4, in the heating operation mode, the heating operation is performed on the heat storage auxiliary device 100 side, and cold water is stored in the cold water well 22. In this case, the pump 31 of the warm water well 21 draws in groundwater (warm water) and sends it into the heat exchanger 4. The heat exchanger 4 exchanges heat between the groundwater in the well-side piping 3 and the medium flowing in the refrigerant circuit 101 on the side of the heat storage auxiliary device 100. On the heat storage auxiliary device 100 side, the medium heated by the heat exchange in the heat exchanger 4 is sent to the heat source device 110 and subjected to the heat exchange in the heat source device 110. Thus, the air conditioner 120 connected to the heat source unit 110 can perform indoor heating. On the other hand, the medium cooled by the heat exchange in the heat source unit 110 is sent to the heat exchanger 4 again and circulated. In the heat exchanger 4, the cooled medium exchanges heat with the groundwater flowing in the well-side piping 3, thereby cooling the groundwater. The cooled groundwater is injected into the cold water well 22 through the well side piping 3, whereby cold water is stored.

In addition, in winter (or at night) when the outside air temperature is low, the geothermal utilization system 1 cools the groundwater without performing the heating operation, and thereby can store cold water in the cold water well 22.

The geothermal energy utilization system 1 can switch between a first heat storage mode including heat storage by the cooling tower 130 and a second heat storage mode including heat storage by the refrigerator 150 when cold water heat storage is performed.

The geothermal energy utilization system 1 performs cold water heat storage in either one of a first heat storage mode and a second heat storage mode by control of a control device 300 described later.

(constitution of first Heat accumulation mode)

As shown in fig. 5, in the first heat storage mode, the cooling water cooled by the heat of vaporization when the cooling tower 130 is in contact with the atmosphere and vaporized is sent to the second heat exchanger 140. In the second heat exchanger 140, heat exchange between the cooling water and the medium in the refrigerant circuit 101 is performed. That is, the second heat exchanger 140 cools the medium of the refrigerant circuit 101 by the cooling water cooled in the cooling tower 130. The cooled medium is sent to the heat exchanger 4, and exchanges heat with the groundwater in the well-side piping 3. In this case, the pump 31 of the warm water well 21 draws in groundwater (warm water) and sends it into the heat exchanger 4. Thereby, the groundwater in the well-side piping 3 is cooled and injected into the cold water well 22, and cold water is stored.

(constitution of the second Heat accumulation mode)

As shown in fig. 6, in the second heat storage mode, the cooling tower 130 and the heat source unit 110 are used as the refrigerator 150. In this case, the pump 31 of the warm water well 21 draws in groundwater (warm water) and sends it into the heat exchanger 4. On the heat storage auxiliary device 100 side, the medium is sent from the second heat exchanger 140 side to the heat source unit 110. The heat source unit 110 cools the medium (cold water) sent from the heat exchanger 4 side by heat exchange. The medium (cold water) cooled by the heat exchange in the heat source unit 110 is sent to the heat exchanger 4. In the heat exchanger 4, the cooled medium exchanges heat with the groundwater flowing in the well-side piping 3, thereby cooling the groundwater. The cooled groundwater is injected into the cold water well 22 through the well side piping 3, whereby cold water is stored. On the other hand, the medium (cooling water) whose temperature has risen by heat exchange with the medium (cold water) on the heat exchanger 4 side in the heat source unit 110 is sent to the second heat exchanger 140. The second heat exchanger 140 cools the medium sent from the heat source unit 110 by exchanging heat with the cooling water cooled in the cooling tower 130.

(constitution of computing device)

As shown in fig. 2, the computing device 200 determines a heat storage mode when heat is stored in the geothermal utilization system 1.

The calculation device 200 performs a simulation calculation in advance as to which of the first heat storage mode and the second heat storage mode is appropriate for cold water heat storage in the case of cold water heat storage in the geothermal energy utilization system 1. The calculation device 200 determines either one of the first thermal storage mode and the second thermal storage mode based on the result of the simulation calculation.

In the present embodiment, the computing device 200 is included in the geothermal utilization system 1. That is, the computing device 200 is installed in the installation site of the geothermal utilization system 1.

The computing device 200 may be provided together with the control device 300, for example.

The computing device 200 may be incorporated into the control device 300 as a part of the control device 300.

The computing device 200 may be installed at a location different from the location where the geothermal energy utilization system 1 is installed.

For example, the computing device 200 may be configured to be capable of data communication with the control device 300 via an external network using a wired or wireless network.

The computing device 200 functionally includes an acquisition unit 210, a first computing unit 220, a second computing unit 230, a temperature computing unit 240, and a determination unit 250.

The acquisition unit 210 acquires the simulation conditions.

The acquisition unit 210 acquires simulation conditions that are the preconditions for simulation calculations performed to determine the thermal storage mode.

The acquired simulation conditions include, for example, external air conditions.

The outside air condition may also include, for example, at least one of an outside air temperature and an outside air humidity.

The outside air conditions may also include both outside air temperature and outside air humidity.

In the present embodiment, the outside air conditions include, for example, an outside air temperature (range) and an outside air humidity (range) assumed in a place (area) where the geothermal utilization system 1 is provided.

The simulation conditions acquired by the acquisition unit 210 may include a pumping temperature and an upper limit water injection temperature. The pumping temperature is the temperature of groundwater that can be pumped in the warm water well 21. The upper limit water injection temperature is an upper limit value of the water injection temperature of the groundwater injected into the chilled water well 22 when the chilled water well 22 stores chilled water heat. The upper limit water injection temperature is an upper limit value of the water injection temperature that suppresses an increase in the temperature of the groundwater in the cold water well 22 when the groundwater is injected into the cold water well 22, for example.

The acquisition unit 210 acquires the acquired outside air temperature and outside air humidity as virtual outside air conditions for performing the simulation.

The acquisition unit 210 may include specifications of the devices constituting the heat source well device 10 and the heat storage auxiliary device 100 as simulation conditions.

The specifications of the equipment may include, for example, the specifications of the pump 31 of the heat source well equipment 10, the heat source unit 110 of the heat storage auxiliary equipment 100, the cooling tower 130, the pump (not shown) provided in the refrigerant circuit 101, and the medium on the side of the heat storage auxiliary equipment 100.

The acquisition unit 210 may acquire the simulation conditions by, for example, an operator accepting input of numerical values or the like of the respective simulation conditions.

The acquisition unit 210 may acquire the simulation conditions from, for example, a database storing specifications of each device constituting the heat source well device 10 and the heat storage auxiliary device 100.

The first calculation unit 220 performs a simulation calculation of a first heat storage mode including heat storage realized by the cooling tower 130, based on the simulation conditions acquired by the acquisition unit 210.

The first calculation unit 220 performs a simulation calculation for the case of performing an operation in the first heat storage mode including the heat storage using the cooling tower 130, as shown in fig. 5, based on the simulation conditions.

The first calculation unit 220 performs a simulation calculation of the case where cold water heat storage is performed in the cold water well 22 by cooling the medium using the cooling tower 130.

The first calculation unit 220 performs a plurality of simulation calculations by varying the temperature and humidity within a range of the virtual outside air temperature and the virtual outside air humidity obtained as the virtual outside air condition.

The first calculation unit 220 calculates (outputs) a first simulation result, which is a result obtained by the simulation calculation.

The first calculation unit 220 may include at least one of the water injection temperature, the heat storage amount, and the power as the first simulation result obtained by the simulation calculation. The water injection temperature is the temperature of groundwater injected into the cold water well 22 from the well side piping 3 which exchanges heat with the refrigerant circuit 101. The stored heat is energy obtained by injecting cold water well 22 from well-side piping 3 that exchanges heat with refrigerant circuit 101. The power required for heat storage is the power required for the heat storage in the first heat storage mode to operate the pump 31 on the heat source well equipment 10 side, various pumps (not shown) provided in the refrigerant circuit 101 of the heat storage auxiliary equipment 100, and the cooling tower 130.

The second calculation unit 230 performs a simulation calculation in the second heat storage mode including the heat storage performed by the refrigerator 150 (the heat source unit 110 and the cooling tower 130) based on the simulation conditions acquired by the acquisition unit 210.

The second calculation unit 230 performs a simulation calculation in the case of performing an operation in the second heat storage mode including the heat storage using the refrigerator 150 as shown in fig. 6, based on the simulation conditions.

The second calculation unit 230 performs a simulation calculation of the case where cold water heat storage is performed in the cold water well 22 by cooling the medium using the refrigerator 150.

The second calculation unit 230 performs a plurality of simulation calculations by varying the temperature and humidity within a range of the virtual outside air temperature and the virtual outside air humidity obtained as the virtual outside air condition.

The second calculation section 230 calculates (outputs) a second simulation result, which is a result obtained by the simulation calculation.

The second calculation unit 230 may include at least one of the water injection temperature, the heat storage amount, and the power as the calculated second simulation result.

The second calculation unit 230 may calculate the second simulation result so that the stored heat amount in the second heat storage mode is the same as the stored heat amount in the first heat storage mode.

The power calculated by the second calculation unit 230 is power for operating the pump 31 on the heat source well device 10 side, various pumps (not shown) provided on the refrigerant circuit 101 side of the heat storage auxiliary device 100, the cooling tower 130, and the heat source device 110.

The temperature calculating unit 240 calculates a limit outside air temperature at which the water injection temperature of the groundwater injected into the cold water well 22 from the well side piping 3 subjected to heat exchange with the refrigerant circuit 101 in the first heat storage mode becomes the upper limit water injection temperature.

The determination unit 250 determines either one of the first thermal storage mode and the second thermal storage mode based on the first simulation result calculated by the first calculation unit 220 and the second simulation result calculated by the second calculation unit 230.

The determination unit 250 may compare, for example, the water injection temperature, the heat storage amount, and the power included in the first simulation result and the second simulation result.

For example, as a result of comparing the first simulation result and the second simulation result, the determination unit 250 determines, for example, the lower water injection temperature of the first heat storage mode and the second heat storage mode as the heat storage mode.

When the simulation is performed so that the stored heat amount in the second heat storage mode is the same as the stored heat amount in the first heat storage mode, the determination unit 250 may determine the lower water injection temperature as the heat storage mode.

For example, as a result of comparing the first simulation result and the second simulation result, the determination unit 250 determines one of the first thermal storage mode and the second thermal storage mode, which has a larger stored heat amount, as the thermal storage mode.

For example, as a result of comparing the first simulation result and the second simulation result, the determination unit 250 determines, as the heat storage mode, the one having the smaller power, for example, based on a result of comparing the power required for heat storage in the first heat storage mode with the power required for heat storage in the second heat storage mode.

When the simulation is performed so that the amount of stored heat in the second heat storage mode is the same as the amount of stored heat in the first heat storage mode, the determination unit 250 may determine the smaller one of the powers as the heat storage mode based on a result of comparing the power required for storing heat in the first heat storage mode with the power required for storing heat in the second heat storage mode.

The determination unit 250 selects the second heat storage mode as the heat storage mode under the condition that the virtual outside air temperature equal to or higher than the limit outside air temperature calculated by the temperature calculation unit 240 is reached. This is because, in the first heat storage mode using the cooling tower 130, when the outside air temperature is high, cooling in the cooling tower 130 may not be sufficiently performed, and the water injection temperature may be equal to or higher than the upper limit water injection temperature.

The determination unit 250 may determine the second heat storage mode in which the large-capacity cold water storage is possible, as the heat storage mode, by comparing a predetermined target cold water storage amount (for example, cold water storage amount is predicted to be equal to the warm water storage amount and cold water storage is performed) with the current state of the cold water storage amount. This is because in the first heat storage mode using the cooling tower 130, there is a possibility that sufficient cold water heat storage amount is not obtained.

The determination unit 250 generates heat storage pattern information in which the determined heat storage pattern of the first heat storage pattern and the second heat storage pattern is associated with the virtual outside air condition at the time of performing the simulation calculation as a result of comparing the first simulation result with the second simulation result.

The determination unit 250 may generate heat storage pattern information in which the determined heat storage pattern is correlated with the virtual outside air temperature (for example, every 1 ℃) calculated by simulation.

The determination unit 250 may generate heat storage pattern information in which the determined heat storage pattern is correlated with the virtual outside air humidity (for example, every 5%) calculated by simulation.

The determination unit 250 may generate heat storage pattern information in which each combination of the determined heat storage pattern and the calculated virtual outside air temperature and virtual outside air humidity is associated with each other.

The determination unit 250 outputs the generated heat storage mode information to the control device 300 described later.

The operation of the computing device 200 of the present embodiment will be described.

The operation of the computing device 200 corresponds to an embodiment of a computing method.

The computing device 200 performs the steps shown in fig. 7.

First, the acquisition unit 210 acquires the simulation conditions (ST 01: a step of acquiring the simulation conditions). The acquisition section 210 acquires an outside air condition (outside air temperature, outside air humidity) as a simulation condition.

For example, the acquisition unit 210 may further acquire the pumping temperature and the upper limit water injection temperature as the simulation conditions.

For example, the acquisition unit 210 may further acquire, as the simulation conditions, the specifications of the pump 31 of the heat source well device 10, the heat source unit 110 of the heat storage auxiliary device 100, the cooling tower 130, the pump (not shown) provided in the refrigerant circuit 101, the medium on the side of the heat storage auxiliary device 100, and the like.

Next, the first calculation unit 220 performs a simulation calculation in the first heat storage mode including the heat storage performed by the cooling tower 130 based on the simulation conditions acquired by the acquisition unit 210 to obtain a first simulation result (ST 02: a step of performing a simulation calculation in the first heat storage mode).

Next, the second calculation unit 230 performs a simulation calculation in the second heat storage mode including the heat storage performed by the refrigerator 150 based on the simulation conditions acquired by the acquisition unit 210, and obtains a second simulation result (ST 03: a step of performing a simulation calculation in the second heat storage mode).

Next to the implementation of ST03, the determination unit 250 compares the power required for storing heat in the first heat storage mode with the power required for storing heat in the second heat storage mode based on the first simulation result obtained in ST02 and the second simulation result obtained in ST03 (ST 04: a step of comparing the power of the first heat storage mode with the power of the second heat storage mode).

Further, following the implementation of ST02, the temperature calculation unit 240 calculates the limit outside air temperature at which the water injection temperature to the cold water well 22 becomes the upper limit water injection temperature when the heat is stored in the first heat storage mode (ST 05: the step of calculating the limit outside air temperature in the first heat storage mode). In ST05, ST04 and ST05 may be performed in parallel, or ST05 may be performed before or after ST03 and ST 04.

After completion of ST04 and ST05, the determination unit 250 determines either one of the first thermal storage mode and the second thermal storage mode based on the first simulation result calculated by the first calculation unit 220 and the second simulation result calculated by the second calculation unit 230 (ST 06: a step of determining the thermal storage mode). The determination unit 250 may determine the heat storage mode so that the energy saving performance is improved, for example, by comparing the water injection temperature, the heat storage amount, and the power included in the first simulation result and the second simulation result.

The determination unit 250 may select the second heat storage mode as the heat storage mode so that the water injection temperature to the cold water well 22 does not exceed the upper limit water injection temperature, for example, at a virtual outside air temperature equal to or higher than the limit outside air temperature.

After the implementation in ST06, the determination unit 250 generates heat storage pattern information in which the determined heat storage pattern is associated with each virtual outside air condition (ST 07: a step of generating heat storage pattern information). The determination unit 250 outputs the generated heat storage mode information to the control device 300.

(constitution of control device)

As shown in fig. 2, the control device 300 controls the operation of the geothermal utilization system 1.

The control device 300 controls the operations of the respective units of the geothermal utilization system 1 in the cooling operation mode, the heating operation mode, the first heat storage mode, and the second heat storage mode, respectively.

When cold water is stored, the control device 300 operates in the heat storage mode determined by the computing device 200.

The control device 300 operates the geothermal utilization system 1 in a heat storage mode according to the actual external air condition based on the actual external air condition at the time of operation.

The control device 300 includes a mode information storage unit 310, an outside air condition acquisition unit 320, and an operation control unit 330.

The mode information storage unit 310 stores the thermal storage mode information output from the computing device 200.

The pattern information storage unit 310 stores the thermal storage pattern information in which the determined thermal storage pattern is associated with each virtual outside air condition in the computing device 200.

The outside air condition acquisition section 320 acquires an actual outside air condition.

The outside air condition acquisition unit 320 acquires at least one of the actual outside air temperature and the actual outside air humidity as the actual outside air condition.

The outside air condition acquisition unit 320 may acquire both the actual outside air temperature and the actual outside air humidity as the actual outside air condition.

The outside air condition acquiring unit 320 may acquire, for example, a thermometer, a hygrometer, or the like, as the actual outside air condition, the actual outside air temperature at the location where the geothermal utilization system 1 is installed, and the detected value of the actual outside air humidity.

The outside air condition acquiring unit 320 may acquire, for example, a value of an actual outside air temperature or an actual outside air humidity inputted by an operator.

The outside air condition acquiring unit 320 may acquire data of an actual outside air temperature and an actual outside air humidity via an external network.

The operation control unit 330 operates the geothermal energy utilization system 1 based on the heat storage mode information stored in the mode information storage unit 310.

The operation control unit 330 operates the geothermal utilization system 1 in either one of the first heat storage mode and the second heat storage mode based on the heat storage mode information stored in the mode information storage unit 310 and the actual external air condition.

The operation control unit 330 refers to the heat storage mode information stored in the mode information storage unit 310, and acquires a heat storage mode associated with a virtual outside air condition corresponding to the acquired actual outside air condition.

The operation control unit 330 controls each unit of the heat source well device 10 and the heat storage auxiliary device 100 in the acquired heat storage mode, and performs a cold water heat storage operation.

The operation of the control device 300 according to the present embodiment will be described.

The operation of the control device 300 corresponds to an embodiment of the control method.

The control device 300 performs the steps shown in fig. 8.

First, the outside air condition acquiring section 320 acquires an actual outside air condition (ST 11: a step of acquiring an actual outside air condition).

After the implementation in ST11, the operation control unit 330 refers to the heat storage mode information stored in the mode information storage unit 310, and acquires a heat storage mode associated with the virtual outside air condition corresponding to the acquired actual outside air condition (ST 12: the step of acquiring information of the heat storage mode corresponding to the actual outside air condition). When the result of comparing the actual outside air conditions at this time is that it is appropriate, the operation control unit 330 acquires one of the heat storage modes determined by the computing device 200.

After the implementation of ST12, the operation control unit 330 operates the geothermal energy utilization system 1 based on the acquired thermal storage pattern (ST 13: a step of operating the geothermal energy utilization system in the acquired thermal storage pattern).

When the first heat storage mode is acquired in accordance with the actual external air condition, the operation control unit 330 performs cold water heat storage in the first heat storage mode.

When the second heat storage mode is acquired in accordance with the actual external air condition, the operation control unit 330 performs cold water heat storage in the second heat storage mode.

(action and Effect)

According to the present embodiment, the computing device 200 determines the heat storage mode based on the first simulation result in the case where the first heat storage mode including the heat storage by the cooling tower 130 is performed and the second simulation result in the case where the second heat storage mode including the heat storage by the refrigerator 150 is performed. Thus, the computing device 200 can determine the thermal storage pattern matching the environmental condition with high accuracy based on the simulation. As a result, the geothermal utilization system 1 can be operated in a regenerative mode that matches the environmental conditions.

Further, according to an example of the present embodiment, the first simulation result and the second simulation result include at least one of a water injection temperature, an accumulated heat amount, and power, respectively.

Thereby, the determination unit 250 can appropriately determine the heat storage mode by comparing at least one of the water injection temperature, the heat storage amount, and the power with the first heat storage mode including the heat storage by the cooling tower 130 and the second heat storage mode including the heat storage by the refrigerator 150.

Further, according to an example of the present embodiment, the determination unit 250 compares the power required for heat storage in the first heat storage mode with the power required for heat storage in the second heat storage mode. Thus, the determination unit 250 can select the heat storage mode that requires less power and has higher energy saving performance.

Further, according to an example of the present embodiment, the second calculation unit 230 calculates the second simulation result so that the stored heat amount in the second heat storage mode is the same as the stored heat amount in the first heat storage mode. In this way, the determination unit 250 can select an appropriate heat storage mode by comparing the first heat storage mode with the second heat storage mode in a state where the amount of heat storage is the same in the first heat storage mode and the second heat storage mode.

Further, according to an example of the present embodiment, the determination unit 250 determines either one of the first heat storage mode and the second heat storage mode in association with each of the plurality of virtual outside air conditions. As described above, the geothermal utilization system 1 can be operated in an appropriate heat storage mode according to the actual external air condition during operation by determining the heat storage mode in association with the virtual external air condition.

Further, according to an example of the present embodiment, the virtual outside air condition includes at least one of a virtual outside air temperature and a virtual outside air humidity.

Thus, the geothermal energy utilization system 1 can be operated in an appropriate heat storage mode according to the actual outside air temperature and the actual outside air humidity during operation.

Further, according to an example of the present embodiment, the determination unit 250 selects the second heat storage mode as the heat storage mode at the virtual outside air temperature equal to or higher than the limit outside air temperature.

Accordingly, when the actual outside air temperature increases and the water injection temperature increases when cooling by the cooling tower 130 is performed, the geothermal utilization system 1 stores heat using the refrigerator 150 without performing cooling by the cooling tower 130, and thus can suppress an increase in the water injection temperature.

According to the calculation method of the present embodiment, the thermal storage mode is determined based on the first simulation result and the second simulation result, and thus the thermal storage mode matching the environmental condition can be determined with high accuracy based on the simulation. As a result, the geothermal utilization system 1 can be operated in a regenerative mode that matches the environmental conditions.

According to the present embodiment, the control device 300 includes: a pattern information storage unit 310 that stores heat storage pattern information on the heat storage pattern determined by the computing device 200; and an operation control unit 330 for operating the geothermal energy utilization system 1 based on the heat storage mode information stored in the mode information storage unit 310.

Thus, the geothermal utilization system 1 can be operated in a heat storage mode that matches the environmental conditions, which is determined with high accuracy based on the simulation performed by the computing device 200.

Further, according to an example of the present embodiment, the operation control unit 330 operates the geothermal energy utilization system 1 based on the heat storage mode associated with the actual external air condition acquired by the external air condition acquisition unit 320.

Thus, the geothermal energy utilization system 1 can be operated in the heat storage mode that is determined with high accuracy based on the simulation performed by the computing device 200 and matches the environmental conditions. As a result, the geothermal utilization system 1 can be operated in a regenerative mode that matches the environmental conditions.

According to the control method of the present embodiment, the geothermal energy utilization system 1 can be operated in the heat storage mode that matches the environmental conditions and is determined with high accuracy based on the simulation performed by the computing device 200. As a result, the geothermal utilization system 1 can be operated in a regenerative mode that matches the environmental conditions.

< modification >

In the above-described embodiment, the programs for realizing the respective functions of the computing device 200 and the control device 300 are recorded on the computer-readable recording medium, and the programs recorded on the recording medium are read into a microcomputer system or the like and executed to perform various processes. Here, the processes of various processes of the CPU (Central Processing Unit: central processing unit) of the computer system are stored in the form of a program in a computer-readable recording medium, and the computer reads out the program and executes the program, thereby performing the various processes. The computer-readable recording medium refers to a magnetic disk, an optical disk, a CD-ROM (Compact Disc Read-Only Memory), a DVD-ROM (Digital Video Disc-Read Only Memory), a semiconductor Memory, and the like. The computer program may be transmitted to a computer via a communication line, and the computer receiving the transmission may execute the program.

In the above-described embodiment, an example of the hardware configuration of the computer 190 executing the program for realizing the respective functions of the computing device 200 and the control device 300 will be described.

As shown in fig. 9, the computer 190 included in each of the computing device 200 and the control device 300 includes a processor 195, a memory 196, a storage/playback device 197, an input/output Interface (Input Output Interface, hereinafter referred to as "IO I/F") 198, and a communication Interface (communication Interface, hereinafter referred to as "communication I/F") 199.

For example, the processor 195 may also be a CPU.

For example, the memory 196 may be a medium such as a random access memory (Random Access Memory, hereinafter referred to as "RAM") that temporarily stores data or the like used in programs executed by the computing device 200 and the control device 300, respectively.

For example, the storage/playback apparatus 197 may be an apparatus for storing data or the like in an external medium such as a CD-ROM, DVD, flash memory, or for playing back data or the like of an external medium.

For example, the IO I/F198 may be an interface for inputting/outputting information or the like between the computing device 200 and other devices, and between the control device 300 and other devices.

For example, the communication I/F199 may be an interface for performing communication between the computing device 200 and other devices and between the control device 300 and other devices via a communication line such as the internet or a dedicated communication line.

< other embodiments >

The embodiments of the present disclosure have been described above, but the embodiments are shown as examples and are not intended to limit the scope of the present disclosure. The present embodiment can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the spirit of the present disclosure. The present embodiment and its modifications are included in the scope and gist of the present disclosure, and similarly, are included in the scope of the present disclosure and the equivalent scope thereof.

< additional notes >

For example, the computing device 200, the computing method, the program, the control device 300, the control method, and the control program described in the embodiments are grasped as follows.

(1) The calculation device 200 according to the first aspect determines a heat storage mode when heat is stored in the geothermal energy utilization system 1, and the geothermal energy utilization system 1 includes: a heat source well device 10 including a warm water well 21, a cold water well 22, a well-side pipe 3 connecting the Wen Shuijing and cold water wells 22, and a pump 31 provided in the well-side pipe 3; and a heat storage auxiliary device 100 having a cooling tower 130, a refrigerator 150, and a refrigerant circuit 101 connected to at least one of the cooling tower 130 and the refrigerator 150 and capable of exchanging heat with the well-side piping 3, wherein the computing device 200 includes: an acquisition unit (210) that acquires a simulation condition; a first calculation unit 220 that calculates a first simulation result that is a result of a simulation of a first heat storage mode including heat storage by the cooling tower 130, based on the simulation conditions; a second calculation unit 230 that calculates a second simulation result that is a result of a simulation of a second heat storage mode including heat storage by the refrigerator 150, based on the simulation conditions; and a determination unit 250 that determines either one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

The calculation device 200 determines the heat storage mode based on the first simulation result when the first heat storage mode including the heat storage by the cooling tower 130 is performed and the second simulation result when the second heat storage mode including the heat storage by the refrigerator 150 is performed. Thus, the computing device 200 can determine the thermal storage pattern matching the environmental condition with high accuracy based on the simulation. As a result, the geothermal utilization system 1 can be operated in a regenerative mode that matches the environmental conditions.

(2) In the second embodiment of the computing device 200, in the computing device 200 of (1), the first simulation result and the second simulation result may include at least one of a water injection temperature into the cold water well 22 from the well side piping 3 that exchanges heat with the refrigerant circuit 101, an amount of heat stored in the heat source well equipment 10 side, and power required for heat storage, respectively.

(3) In the computing device 200 according to the third aspect, in the computing device 200 according to (1) or (2), the determining unit 250 may determine the heat storage mode based on a result of comparing the power required for heat storage in the first heat storage mode with the power required for heat storage in the second heat storage mode.

By comparing the power required for heat storage in the first heat storage mode with the power required for heat storage in the second heat storage mode, the determination unit 250 can thereby select the heat storage mode with higher energy saving.

(4) In the computing device 200 according to the fourth aspect, in the computing device 200 according to any one of (1) to (3), the second computing unit 230 may calculate the second simulation result so that the stored heat amount in the second heat storage mode is the same as the stored heat amount in the first heat storage mode.

In this way, the determination unit 250 can select an appropriate heat storage mode by comparing the first heat storage mode with the second heat storage mode in a state where the amount of heat storage is the same in the first heat storage mode and the second heat storage mode.

(5) In the computing device 200 according to the fifth aspect, in the computing device 200 according to any one of (1) to (4), the determining unit 250 may determine either one of the first thermal storage mode and the second thermal storage mode in association with each of a plurality of virtual external air conditions.

By determining the heat storage mode in association with the virtual outside air condition, the geothermal utilization system 1 can be operated in an appropriate heat storage mode according to the actual outside air condition during operation.

(6) The calculation device 200 according to the sixth aspect may be the calculation device 200 according to (5), wherein the virtual outside air condition includes at least one of a virtual outside air temperature and a virtual outside air humidity.

(7) The computing device 200 according to the seventh aspect may be the computing device 200 according to (6), further comprising: the temperature calculating unit 240 calculates a limit outside air temperature at which the water injection temperature into the cold water well 22 from the well side piping 3 that exchanges heat with the refrigerant circuit 101 becomes an upper limit water injection temperature in the first heat storage mode, and the determining unit 250 selects the second heat storage mode as the heat storage mode, when the virtual outside air temperature becomes equal to or higher than the limit outside air temperature.

By selecting the second heat storage mode as the heat storage mode in the case where the water injection temperature is equal to or higher than the upper limit water injection temperature, the geothermal utilization system 1 can suppress an increase in the water injection temperature by performing heat storage using the refrigerator 150 without performing cooling by the cooling tower 130 when the actual outside air temperature is high and the water injection temperature is high when cooling by the cooling tower 130 is performed.

(8) The calculation method according to the eighth aspect determines a heat storage mode when heat is stored in the geothermal energy utilization system 1, and the geothermal energy utilization system 1 includes: a heat source well device 10 including a warm water well 21, a cold water well 22, a well-side pipe 3 connecting the Wen Shuijing and cold water wells 22, and a pump 31 provided in the well-side pipe 3; and a heat storage auxiliary device 100 having a cooling tower 130, a refrigerator 150, and a refrigerant circuit 101 connected to at least one of the cooling tower 130 and the refrigerator 150 and capable of exchanging heat with the well-side piping 3, wherein in the calculation method, a simulated condition is acquired; calculating a first simulation result based on the simulation conditions, the first simulation result being a result of a simulation of a first heat storage mode including heat storage achieved by the cooling tower 130; calculating a second simulation result based on the simulation conditions, the second simulation result being a result of a simulation of a second heat storage mode including heat storage achieved by the refrigerator 150; and determining any one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

By determining the heat storage mode based on the first simulation result and the second simulation result, the heat storage mode matching the environmental condition can be determined with high accuracy based on the simulation. As a result, the geothermal utilization system 1 can be operated in a regenerative mode that matches the environmental conditions.

(9) A program according to a ninth aspect causes a computer to execute a method of determining a heat storage mode when heat is stored in a geothermal energy utilization system 1, wherein the geothermal energy utilization system 1 includes: a heat source well device 10 including a warm water well 21, a cold water well 22, a well-side pipe 3 connecting the Wen Shuijing and cold water wells 22, and a pump 31 provided in the well-side pipe 3; and a heat storage auxiliary device 100 having a cooling tower 130, a refrigerator 150, and a refrigerant circuit 101 connected to at least one of the cooling tower 130 and the refrigerator 150 and capable of exchanging heat with the well-side piping 3, wherein in the method, simulated conditions are obtained; calculating a first simulation result based on the simulation conditions, the first simulation result being a result of a simulation of a first heat storage mode including heat storage achieved by the cooling tower 130; calculating a second simulation result based on the simulation conditions, the second simulation result being a result of a simulation of a second heat storage mode including heat storage achieved by the refrigerator 150; and determining any one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

(10) The control device 300 according to the tenth aspect includes: a pattern information storage unit 310 that stores heat storage pattern information related to the heat storage pattern determined by the computing device 200 according to any one of (1) to (7); and an operation control unit 330 that operates the geothermal utilization system 1 based on the heat storage mode stored in the mode information storage 310.

(11) The control device 300 according to the eleventh aspect may be the control device 300 according to (10), wherein the control device includes: an outside air condition acquisition unit 320 that acquires an actual outside air condition, and the operation control unit 330 operates the geothermal utilization system 1 based on the heat storage mode associated with the actual outside air condition acquired by the outside air condition acquisition unit 320.

(12) The control method of the twelfth aspect, wherein heat storage mode information relating to the heat storage mode decided by the computing device 200 as any one of (1) to (7) is stored in advance; the geothermal utilization system 1 is operated based on the stored thermal storage pattern.

(13) The control program of the thirteenth aspect causes the computer to execute the method of: storing in advance heat storage mode information relating to the heat storage mode decided by the computing device 200 as any one of (1) to (7); the geothermal utilization system 1 is operated based on the stored thermal storage pattern.

Description of the reference numerals

1: geothermal energy utilization system

2: well

3: well side piping

4: heat exchanger

10: heat source well equipment

21: wen Shuijing

22: cold water well

31: pump with a pump body

100: heat storage auxiliary equipment

101: refrigerant circuit

110: heat source machine

120: air conditioner

130: cooling tower

140: second heat exchanger

150: refrigerating machine

190: computer with a memory for storing data

195: processor and method for controlling the same

196: memory device

197: storage/reproducing apparatus

198：IO I/F

199: communication I/F

200: computing device

210: acquisition unit

220: a first calculating part

230: a second calculating part

240: temperature calculating unit

250: determination unit

300: control device

310: mode information storage unit

320: external air condition acquiring unit

330: operation control unit

ST01: step of acquiring simulation conditions

ST02: step of performing analog computation in first thermal storage mode

ST03: step of performing analog computation in the second thermal storage mode

ST04: comparing the power of the first heat storage mode with the power of the second heat storage mode

ST05: step of calculating the limiting outside air temperature in the first heat storage mode

ST06: determining a thermal storage mode

ST07: generating heat storage mode information

ST11: step of acquiring actual external air Condition

ST12: a step of acquiring a heat storage pattern corresponding to an actual external air condition

ST13: a step of operating the geothermal utilization system in the acquired thermal storage mode

Claims

1. A computing device determines a heat storage mode when heat is stored by a geothermal heat utilization system, the geothermal heat utilization system comprising: a heat source well device including a warm water well, a cold water well, a well-side pipe connecting the Wen Shuijing and the cold water well, and a pump provided in the well-side pipe; and a heat storage auxiliary device including a cooling tower, a refrigerator, and a refrigerant circuit connected to at least one of the cooling tower and the refrigerator and capable of exchanging heat with the well-side piping, wherein the computing device includes:

an acquisition unit that acquires a simulation condition;

a first calculation unit that calculates a first simulation result that is a result of a simulation of a first heat storage mode including heat storage achieved by the cooling tower, based on the simulation condition;

a second calculation unit that calculates a second simulation result that is a result of a simulation of a second heat storage mode including heat storage achieved by the refrigerator, based on the simulation condition; and

And a determining unit configured to determine one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

2. The computing device of claim 1, wherein,

the first simulation result and the second simulation result each include at least one of a water injection temperature into the cold water well from the well side piping that exchanges heat with the refrigerant circuit, an amount of heat stored on the heat source well equipment side, and power required for heat storage.

3. The computing device of claim 1 or 2, wherein,

the determination unit determines the heat storage mode based on a result of comparing power required for heat storage in the first heat storage mode with power required for heat storage in the second heat storage mode.

4. The computing device of any one of claim 1 to 3, wherein,

the second calculation portion calculates the second simulation result in such a manner that the stored heat amount in the second heat storage mode is the same as the stored heat amount in the first heat storage mode.

5. The computing device of any one of claims 1 to 4, wherein,

the determination unit determines one of the first thermal storage mode and the second thermal storage mode in association with each of a plurality of virtual external air conditions.

6. The computing device of claim 5, wherein,

the virtual outside air condition includes at least one of a virtual outside air temperature and a virtual outside air humidity.

7. The computing device of claim 6, further comprising:

a temperature calculation unit configured to calculate a limit outside air temperature at which a water injection temperature into the cold water well from the well side piping that exchanges heat with the refrigerant circuit in the first heat storage mode becomes an upper limit water injection temperature,

the determination unit selects the second thermal storage mode as the thermal storage mode at the virtual outside air temperature equal to or higher than the limit outside air temperature.

8. A calculation method determines a heat storage mode when heat is stored by a geothermal heat utilization system, the geothermal heat utilization system comprising: a heat source well device including a warm water well, a cold water well, a well-side pipe connecting the Wen Shuijing and the cold water well, and a pump provided in the well-side pipe; and a heat storage auxiliary device having a cooling tower, a refrigerator, and a refrigerant circuit connected to at least one of the cooling tower and the refrigerator and capable of exchanging heat with the well-side piping, wherein in the calculation method,

Obtaining simulation conditions;

calculating a first simulation result based on the simulation conditions, the first simulation result being a result of a simulation of a first heat storage mode including heat storage achieved by the cooling tower;

calculating a second simulation result based on the simulation condition, the second simulation result being a result of a simulation of a second heat storage mode including heat storage achieved by the refrigerator;

and determining any one of the first thermal storage mode and the second thermal storage mode based on the first simulation result and the second simulation result.

9. A program for causing a computer to execute a method for determining a heat storage mode when heat is stored by a geothermal utilization system, the geothermal utilization system comprising: a heat source well device including a warm water well, a cold water well, a well-side pipe connecting the Wen Shuijing and the cold water well, and a pump provided in the well-side pipe; and a heat storage auxiliary device having a cooling tower, a refrigerator, and a refrigerant circuit connected to at least one of the cooling tower and the refrigerator and capable of exchanging heat with the well-side piping,

obtaining simulation conditions;

10. A control device is provided with:

a mode information storage unit that stores heat storage mode information relating to the heat storage mode determined by the computing device according to any one of claims 1 to 7; and

and an operation control unit that operates the geothermal utilization system based on the heat storage mode information stored in the mode information storage unit.

11. The control device according to claim 10, comprising:

an outside air condition acquisition unit that acquires an actual outside air condition,

the operation control unit operates the geothermal utilization system based on the heat storage mode associated with the actual external air condition acquired by the external air condition acquisition unit.

12. A control method, wherein,

storing in advance heat storage mode information relating to the heat storage mode decided by the computing device according to any one of claims 1 to 7;

The geothermal utilization system is operated based on the stored thermal storage mode information.

13. A control program for causing a computer to execute the method of: