CN113221315B - Design and model selection method and system for building seawater source heat pump system unit - Google Patents
Design and model selection method and system for building seawater source heat pump system unit Download PDFInfo
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Abstract
The invention discloses an equipment model selection method and an equipment model selection system for constructing a seawater source heat pump system, belongs to the technical field of seawater source heat pump systems, comprehensively considers the resistance-capacitance characteristics of building envelope structures and various internal heat accumulators, constructs a building resistance-capacitance model, and grasps the thermal process energy flow response characteristics of a building subsystem under the action of outdoor meteorological conditions. The resistance-capacitance characteristics of the water-taking and heat-exchanging subsystem at the front end of the seawater source heat pump are analyzed, a resistance-capacitance model is built, and the thermal process energy flow response characteristics of the subsystem under the action of seawater weather conditions are mastered. The asynchronous cooperation between the seawater temperature and the atmospheric temperature is considered to coordinate the thermal process energy flow response characteristics of the building and the front terminal system, the heat pump equipment design selection method is further refined, reasonable matching of equipment with building loads is achieved, and the system operation efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of seawater source heat pump systems, and particularly relates to a design model selection method and system for constructing a seawater source heat pump system unit.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The reasonable type selection of the equipment in the design stage of the air conditioning system is always regarded as an effective method for improving the operation efficiency of the system. Especially, whether the type selection of the cold (heat) source unit is reasonable or not affects the use effect of the air conditioning system, more importantly, the operation economy, and the improper type selection causes unnecessary waste and increases the management difficulty. From the 80 s of the last century, china has come out a series of building energy-saving standards successively, including standards such as national building heating, ventilation and air conditioning design Specifications GB50736, public building energy-saving design Standard GB50189 and public building energy-saving detection Standard JGJ-T177, which make clear provisions for building air-conditioning cold (heat) source unit type selection configuration. The traditional model selection method of the cold (heat) source unit of the air conditioning system is to multiply a safety factor on the basis of the maximum cold (heat) load of a building as the design load of the air conditioning system.
However, the inventor finds that the load calculation method in the current design specification in China does not comprehensively master the response characteristics of the energy flow in the thermal process of the building, does not consider the asynchronism between the outdoor atmospheric temperature harmonic function which mainly influences the building load and the seawater temperature harmonic function which influences the heat extraction of the front-end heat exchanger of the seawater source, and does not comprehensively master the response characteristics of the energy flow in the thermal process of the building and the front-end heat exchanger, so that the problem of overlarge equipment design selection inevitably occurs, equipment is in a partial load operation state for a long time, and the system operation efficiency is reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide an equipment model selection method and an equipment model selection system for constructing a seawater source heat pump system, which comprehensively consider the resistance-capacitance characteristics of a building envelope and various internal heat accumulators, construct a building resistance-capacitance model and master the thermal process energy flow response characteristics of a building subsystem under the action of outdoor meteorological conditions. The resistance-capacitance characteristics of the water-taking and heat-exchanging subsystem at the front end of the seawater source heat pump are analyzed, a resistance-capacitance model is built, and the thermal process energy flow response characteristics of the subsystem under the action of seawater weather conditions are mastered. The asynchronism between the seawater temperature and the atmospheric temperature is considered to cooperate with the response characteristic of the thermal process energy flow of the building and the front terminal system, the design and the model selection method of the heat pump equipment are further refined, the reasonable matching of the equipment with the building load is realized, and the system operation efficiency is improved.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, the technical scheme of the invention provides a design and model selection method for constructing a seawater source heat pump system, which comprises the following steps:
acquiring meteorological year hourly atmospheric temperature and shallow water temperature parameters;
constructing a resistance-capacitance calculation model;
the resistance-capacitance calculation model outputs a heat exchange heat process supply and demand energy flow harmonic function to cooperate with the heat exchange process supply and demand energy flow harmonic function response characteristic according to the obtained temperature harmonic function;
and outputting the type and number of the selected water source heat pump units according to the supply and demand energy flow harmonic function in the heat exchange process by taking the deviation between the minimum unit power and the expected value as an optimization target.
In a second aspect, the technical solution of the present invention further provides a system for constructing a seawater source heat pump system, including the following modules, which perform cascade operations:
a first module configured to acquire meteorological year hourly atmospheric temperature and shallow water temperature parameters;
a second module configured to build a resistance-capacitance calculation model;
a third module configured to output a heat exchange thermal process supply and demand energy flow harmonic function to coordinate with a heat exchange process supply and demand energy flow harmonic function response characteristic according to the obtained temperature harmonic function;
and the fourth model is configured to output the model and the number of the selected water source heat pump units according to the supply and demand energy flow harmonic function of the heat exchange process by taking the deviation between the minimum unit power and the expected value as an optimization target.
In a third aspect, the present invention further provides a computer-readable storage medium, where multiple instructions are stored, where the instructions are adapted to be loaded by a processor of a terminal device and execute the method for building a design and model selection of a seawater source heat pump system unit according to the first aspect.
In a fourth aspect, the present invention further provides a terminal device, including a processor and a computer-readable storage medium, where the processor is configured to implement each instruction; the computer readable storage medium is used for storing a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the design and model selection method for constructing the seawater source heat pump system unit according to the first aspect.
In a fifth aspect, the technical solution of the present invention further provides a seawater source heat pump system, wherein the method for constructing a seawater source heat pump system unit design model selection according to the first aspect is executed;
or the like, or a combination thereof,
the system comprises the system for constructing the seawater source heat pump system according to the second aspect;
or the like, or a combination thereof,
comprising the computer-readable storage medium of the third aspect;
or the like, or, alternatively,
comprising a terminal device as described in the fourth aspect.
The working principle of the invention is that the seawater temperature harmonic function has certain amplitude attenuation and phase delay relative to the atmospheric temperature harmonic function in consideration of the resistance-capacitance characteristic of seawater. Due to delay and attenuation among the harmonic functions of the atmospheric temperature, the seawater temperature and the seabed temperature, the seawater source heat pump for directly taking water and exchanging heat or the seawater-soil double-source heat pump whole system heat process taking a heat exchanger embedded in the seabed as a front-end heat exchanger is not the minimum energy flow supplied by the front-end water taking and heat exchanging subsystem when the energy flow required by the building subsystem influenced by the atmospheric temperature is the maximum in one year. Therefore, due to the difference of the resistance-capacitance characteristics of the seawater source heat pump or the seawater-soil double source heat pump system building and the front end water taking heat exchanger subsystem, the phases of the energy flow harmonic functions of the two subsystems responding to the atmospheric temperature heat action have asynchronization. In conjunction with this asynchronism, the heat pump unit can be designed and operated with reduced unit installed capacity.
The technical scheme of the invention has the following beneficial effects:
1) The invention considers the resistance-capacitance characteristic of seawater, and the seawater temperature harmonic function has certain amplitude attenuation and phase delay relative to the atmospheric temperature harmonic function.
2) In the invention, various heat accumulators in the building are considered, the energy flow response characteristics of the building and the front-end water taking and heat exchanging process of the seawater source heat pump are comprehensively mastered, and the energy flow response characteristics of the two subsystems are cooperated, so that the equipment model selection method is further refined, and the system operation efficiency is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are included to illustrate an exemplary embodiment of the invention and not to limit the invention.
FIG. 1 is a statistical plot of an average air temperature profile and an average water temperature profile according to one or more embodiments of the present invention.
The spacing or size between each other is exaggerated to show the location of the locations, and the illustration is for illustrative purposes only.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, it indicates the presence of the stated features, steps, operations, devices, components, and/or combinations thereof.
Example 1
In a typical embodiment of the present invention, this embodiment discloses a design selection method for constructing a seawater source heat pump system, since the building load changes according to the change of outdoor air temperature, as can be seen from fig. 1 in summer, the air temperature reaches the maximum value all the year around at 1 point, and the building cooling load also reaches the maximum value at this time. The seawater temperature has certain delay and hysteresis relative to the atmospheric temperature, so when the temperature reaches the maximum value all year round, the corresponding seawater temperature does not reach the maximum value at 2 points. Since the sea water temperature is related to the amount of heat rejected by the system, the lower the sea water temperature, the larger the EER, and at 2 o' clock the EER of the system is a relatively high value, it is possible to make appropriate reductions in the choice of unit capacity. The same principle is also applied in winter, and the installed capacity of the unit can be reduced for the system by utilizing the asynchronism of the phase of the harmonic function of the energy flow, and the investment cost is reduced.
With the above characteristics, the present embodiment includes the following steps:
the method comprises the following steps: analyzing typical weather year hourly atmospheric temperature and shallow water temperature parameters of a city where the design project is located, and regressing temperature harmonic functions of the atmospheric temperature and the shallow water temperature;
step two: constructing a resistance-capacitance calculation model of a water taking and heat exchanging system at the front end of a building and a seawater source heat pump system;
step three: under the working condition of the whole year, combining the response characteristics of the harmonic functions of the energy flow supply and demand of the building and the front-end heat exchanger in the thermal process, and bringing the harmonic functions of the air temperature and the seawater temperature into a resistance-capacitance calculation model of a building and seawater source heat pump system front-end water taking and heat exchanging subsystem to calculate the harmonic functions of the energy flow supply and demand of the building subsystem and the seawater source heat pump system in the thermal process of the building and the seawater source heat pump system front-end water taking and heat exchanging subsystem in 8760 hours of the whole year;
step four: the method comprises the steps of taking a thermal process demand energy flow harmonic function of a building subsystem and a thermal process supply energy flow harmonic function of a water-taking heat exchange subsystem at the front end of a seawater source heat pump system within 8760 hours all year round (ensuring that the inlet temperature of a heat medium of heat exchange equipment is set to be the design water supply temperature under the rated working condition) as expected values, taking the deviation of the unit power and the expected values as an optimization target, ensuring that the supplied energy of the unit at each moment within 8760 hours all year round is greater than the expected value, and selecting the type and number of the water source heat pump units, so as to construct the design and selection method of the seawater source heat pump system.
It can be understood that, in the second step and the third step, the present embodiment constructs an integrated building resistance-capacitance model and a dynamic resistance-capacitance model of the seawater source heat pump front-end water intake heat exchanger, where a city belongs to an expression method of an area where a building is located, and may also be embodied in other geographical or administrative areas.
It is understood that the seawater source heat pump system in the present embodiment is a heat pump air conditioning system using seawater as a heat exchange medium, for example, a seawater source heat pump system with an energy storage device disclosed in the patent with the application number of cn201821314432. X.
It is understood that the method disclosed in the present embodiment can also be applied to a seawater-soil dual-source heat pump system.
It is understood that the air temperature inside the building, as well as the temperature of the seawater, is obtained by means of temperature sensors arranged inside the building; the working mode includes heating or cooling, and the heating mode and the cooling mode are automatically switched to methods known in the art, and detailed description thereof is omitted.
Further, analyzing the asynchronism of the harmonic functions of the atmospheric temperature and the seawater temperature in the typical meteorological year of the region; the two temperature harmonic functions are used as input values, under the working condition of the whole year, the harmonic function response characteristics of the supply and demand energy flow in the heat process of the building and the front-end water taking heat exchanger are cooperated, and the method comprises the following steps:
setting a region;
counting the hourly average temperature of a typical meteorological year of a set region and making a temperature curve with the horizontal axis as time and the vertical axis as temperature;
counting the hourly seawater temperature of the near-shore shallow surface layer of a set area and making an average water temperature curve with the horizontal axis as time and the vertical axis as temperature;
and (4) coinciding the time axes of the atmospheric temperature curve and the seawater temperature curve.
The time-by-time average air temperature curve and the water temperature curve chart after the creation are shown in fig. 1. The hourly average air temperature is selected from hourly average air temperature, and the hourly average water temperature of the near-shore shallow surface layer is selected as seawater temperature.
It can be understood that the variation amplitude difference of the two temperature harmonic functions of air and seawater is the temperature value corresponding to the difference between the highest values of the air temperature curve and the water temperature curve and the temperature value corresponding to the difference between the lowest values of the air temperature curve and the water temperature curve.
Furthermore, a resistance-capacitance calculation model of a building and a seawater source heat pump front-end water taking and heat exchanging subsystem is constructed, a time-by-time average atmospheric temperature and seawater temperature harmonic function of a typical meteorological year is used as input values of the resistance-capacitance model of the building and the heat exchanging subsystem, and a time-by-time required energy flow harmonic function of the building and a time-by-time supplied energy flow harmonic function of the time-by-time heat exchanger subsystem are calculated.
Further, the variation amplitude difference of the thermal process required energy flow harmonic function of the building subsystem and the thermal process supplied energy flow harmonic function of the water taking and heat exchanging subsystem at the front end of the seawater source heat pump system (the inlet temperature of a heat medium of heat exchange equipment is set to be the designed water supply temperature under the rated working condition) within 8760 hours all year is taken as an expected value, the deviation of the unit power and the expected value is taken as an optimization target, and the supplied energy of the unit at each moment within 8760 hours all year is ensured to be larger than the expected value.
Furthermore, after the number and the type of the heat pump units are selected, the actual refrigerating or heating effect is calculated according to the power of the selected heat pump units.
In this embodiment, the Qingdao area is taken as an example, as shown in the figure, the temperature is highest when the atmospheric temperature in summer in the Qingdao area is at 1 point (about 7 months, 25 days and 14 days), and the corresponding building cold load is set to be 1000kw at this time. If the seawater temperature is delayed by about 20 days from the atmospheric temperature, the seawater temperature is not 1' point corresponding to 7, month and 25 days at the maximum, but 2 points corresponding to 8, month and 15 days, and the atmospheric temperature is already reduced at 8, month and 15 days, at which time the building cooling load is 800kw.
According to a traditional unit selection mode, a seawater source heat pump unit is selected according to the fact that the cold load of a building is multiplied by a 10% margin value, namely 1100kw is used as a rated refrigerating capacity, and in consideration of the influence of water temperature on unit EER, a seawater source unit A selected by a unit EER corresponding to the highest water temperature, for example EER4.5 of the unit with the highest water temperature, is selected to have power of 245kw.
In this embodiment, the delay of the seawater temperature relative to the atmospheric temperature is fully considered, and according to the EER curve of the seawater source unit a, the higher the seawater temperature, the smaller the EER of the unit. The unit EER corresponding to the average temperature of the seawater at the point 2 (No. 8/15) is 4.5,1' and the unit EER corresponding to the point 7/25 is about 5.0.
Then in the 7 months and 25 days with the maximum building cold load, the power of the unit is W =1000/5.0=200kw;
the refrigerating capacity of the accounting unit in the day of 8 months and 15 days with the highest seawater temperature is Q =200 × 4.5=900kw > -800kw, so the requirement of the building cold load on the day can be met.
Therefore, according to the embodiment, a seawater source heat pump unit with the power of 200kw can be selected, the power is reduced by 22.5%, and the installed capacity of the unit is obviously reduced. Therefore, the initial investment of the unit can be reduced, and the running cost of the unit can be reduced.
Example 2
The present embodiment is different from embodiment 1 in that, in this embodiment, the Qingdao area is taken as an example, as shown in FIG. 1, the temperature in the Qingdao area is the lowest at 3 o' clock (about 1 month and 20 days) in winter, and the corresponding building heat load is set to be 1000kw. If the seawater temperature is delayed by about 20 days from the atmospheric temperature, the seawater temperature is not 2 points corresponding to 1 month and 20 days at the lowest but 4 points corresponding to 2 months and 15 days at the lowest, and the atmospheric temperature rises again at 2 months and 15 days, and the building heat load is 800kw at this time.
For the soil-seawater dual-source heat pump system taking the heat exchanger buried in the seabed as the front-end heat exchanger, the heat taking quantity of the front-end heat exchanger is changed along with the change of the temperature of the seawater. The higher the seawater temperature is, the more the heat extraction of the front-end heat exchanger increases. The heat extraction amount is increased, so that the power consumption of the heat pump unit can be reduced.
According to a traditional unit model selection mode, the power of the seawater source heat pump unit is determined by the heat taking quantity of the heat exchanger corresponding to the coldest seawater temperature. Assuming that when the average temperature of the seawater is lowest at 4 points (No. 2/15), the heat taking quantity of the corresponding front-end heat exchanger is 750kw, and the power of the seawater source heat pump unit is 250kw.
In this embodiment, the delay of the seawater temperature with respect to the atmospheric temperature is sufficiently considered, and assuming that the heat extraction amount of the front-end heat exchanger corresponding to the lowest average seawater temperature at 4 o ' clock (No. 2/month and No. 15) is 750kw, the heat extraction amount of the front-end heat exchanger corresponding to 3' o ' clock (day 1/month and 20) is about 800kw.
Then in 1 month and 20 days with the maximum building heat load, the power of the unit is W =1000-800=200kw;
the power of the accounting unit in 2 months and 15 days with the lowest seawater temperature is W =800-750=50kw > -200kw, so that the heat load requirement of the building on the day can be met.
Therefore, according to the embodiment, a seawater source heat pump unit with the rated power of 200kw can be selected, the power is reduced by 25%, and the installed capacity of the unit is reduced to some extent. Therefore, the initial investment of the unit can be reduced, and the running cost of the unit can be reduced.
Example 3
In a typical implementation manner of the present invention, this embodiment discloses a system for constructing a seawater source heat pump, which can be used to execute the method disclosed in embodiment 1 or embodiment 2, and includes the following modules, which perform cascade operations:
a first module configured to analyze the asynchrony of changes in two temperature harmonic functions, air and seawater, time-by-time in a typical year at a building design site;
the second module is configured to construct a resistance-capacitance calculation model of a building and a seawater source heat pump system front-end water taking and heat exchanging subsystem;
a third module configured to calculate a thermal process supply and demand energy flow harmonic function of the construction subsystem and the seawater source heat pump system front end water intake heat exchange subsystem for 8760 hours all year round;
and the fourth model is configured to select the types and the number of the water source heat pump units by taking the variation amplitude difference of the thermal process demand energy flow harmonic function of the building subsystem and the thermal process supply energy flow harmonic function of the water taking and heat exchanging subsystem at the front end of the seawater source heat pump system (ensuring that the inlet temperature of the heat exchange equipment heat medium is set to be the design water supply temperature under the rated working condition) as a desired value within 8760 hours all the year, and by taking the deviation of the unit power and the desired value as an optimization target and ensuring that the energy supply of the unit at each moment within 8760 hours all the year is greater than the desired value.
It is understood that the cascade action among the modules is related to that when the action of the nth module is unsuccessful or unable to act, the (n + 1) th module is put into action.
n is an integer of 1 or more.
Of course, the first module, the second module, and the third module correspond to the first step, the second step, and the third step in the first embodiment, and the modules are the same as the corresponding steps in the implementation example and the application scenario, but are not limited to the disclosure in the first embodiment. It should be noted that the modules described above as part of a system may be implemented in a computer system such as a set of computer-executable instructions.
Example 4
In an exemplary embodiment of the present invention, this embodiment discloses a computer-readable storage medium, in which a plurality of instructions are stored, and the instructions are adapted to be loaded by a processor of a terminal device and to execute a method for constructing a seawater-source heat pump system as described in embodiment 1 or embodiment 2.
Example 5
In an exemplary implementation manner of the present invention, the present embodiment discloses a terminal device, which includes a processor and a computer-readable storage medium, where the processor is configured to implement various instructions; the computer readable storage medium is used for storing a plurality of instructions, and the instructions are suitable for being loaded by a processor and executing the method for constructing the seawater source heat pump system in the embodiment 1 or the embodiment 2.
Example 6
In an exemplary embodiment of the present invention, this embodiment discloses a seawater source heat pump system, which executes the method for constructing a seawater source heat pump system as described in embodiment 1 or embodiment 2;
or the like, or a combination thereof,
a system comprising the seawater source heat pump system constructed as described in example 3;
or the like, or, alternatively,
comprising the computer-readable storage medium of embodiment 4;
or the like, or, alternatively,
comprising the terminal device as described in embodiment 5.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A device model selection design method for constructing a seawater source heat pump system is characterized by comprising the following steps:
the method comprises the following steps: analyzing typical meteorological year hourly atmosphere temperature and shallow water temperature parameters of a city where the design project is located, regressing temperature harmonic functions of the typical meteorological year hourly atmosphere temperature and shallow water temperature parameters, and acquiring temperature harmonic functions of the typical meteorological year hourly atmosphere temperature and shallow water temperature parameters;
step two: constructing a resistance-capacitance calculation model of a water taking and heat exchanging system at the front end of a building and a seawater source heat pump system; the seawater temperature harmonic function is relative to the atmospheric temperature harmonic function in phase delay and amplitude attenuation, the seawater temperature of the system heat rejection quantity is related, the lower the seawater temperature is, the larger the EER is, and the EER of the system is a relatively higher value at 14 points, so that the appropriate reduction can be carried out when the unit capacity is selected, and a resistance-capacitance calculation model is constructed; the resistance-capacitance calculation model outputs a heat exchange heat process supply and demand energy flow harmonic function to cooperate with the heat exchange process supply and demand energy flow harmonic function response characteristic according to the obtained temperature harmonic function;
step three: under the working condition of the whole year, combining the response characteristics of the harmonic functions of the energy flow supplied and required by the thermal process of the building and the front-end heat exchanger, and bringing the harmonic functions into a resistance-capacitance calculation model of a front-end water taking and heat exchanging subsystem of the building and the sea water source heat pump system according to the typical annual air and sea water temperature harmonic functions to calculate the harmonic functions of the energy flow supplied and required by the thermal process of the front-end water taking and heat exchanging subsystem of the building and the sea water source heat pump system; the variation amplitude difference of the two temperature harmonic functions of the air and the seawater is a temperature value corresponding to the difference between the highest values of the air temperature curve and the water temperature curve and a temperature value corresponding to the difference between the lowest values of the air temperature curve and the water temperature curve;
step four: the method comprises the steps of taking a harmonic function of energy flow required by a thermal process of a whole year building subsystem and a harmonic function of energy flow supplied by a thermal process of a water-taking and heat-exchanging subsystem at the front end of a seawater source heat pump system as expected values, ensuring that the inlet temperature of a heat medium of heat-exchanging equipment is set as a design water supply temperature under a rated working condition, taking the deviation between the minimum unit power and the expected value as an optimization target, ensuring that the energy supply of the unit at each moment in the whole year is greater than the expected value, and selecting the type and the number of the water source heat pump units, so as to construct a design and selection method of the seawater source heat pump system unit; the expected value is the variation amplitude difference of two energy flow harmonic functions of the building subsystem and the seawater source front end water taking and heat exchanging subsystem, and the variation amplitude difference is the energy flow value corresponding to the difference value between the highest value of the building demand curve and the highest value of the front end supply curve; and the energy value corresponding to the difference value is the expected value of the cold and heat load of the system.
2. The model selection design method for constructing the seawater source heat pump system equipment as claimed in claim 1, wherein the heat exchange process is a heat exchange process between a building and a front-end water collector of the seawater source heat pump system.
3. The model selection design method for constructing the seawater source heat pump system equipment according to claim 1, wherein when the resistance-capacitance calculation model outputs the harmonic function of the supply and demand energy flow in the heat exchange heat process according to the obtained temperature harmonic function, the method comprises the following steps:
setting a region;
counting the time-by-time average air temperature of a typical meteorological year of a set region and making an air temperature curve with the horizontal axis as time and the vertical axis as temperature;
counting the hourly sea water temperature of the near-shore shallow surface layer of the set area and making an average water temperature curve with the horizontal axis as time and the vertical axis as temperature;
and (4) coinciding time axes of the atmospheric temperature curve and the seawater temperature curve.
4. The model selection design method for constructing the seawater source heat pump system equipment as claimed in claim 1, wherein the resistance-capacitance calculation model is a resistance-capacitance calculation model of a building and a seawater source heat pump system front-end water-taking heat exchange system.
5. The type selection design method for constructing the seawater source heat pump system equipment as claimed in claim 1, wherein after the number and the type of the heat pump units are selected, the actual cooling or heating effect is calculated according to the power of the selected heat pump units.
6. A system for constructing a seawater source heat pump system is characterized by comprising the following modules, wherein the modules are in cascade action:
the system comprises a first module, a second module and a third module, wherein the first module is configured to analyze typical weather year hourly atmosphere temperature and shallow water temperature parameters of a city where a design project is located and regress temperature harmonic functions of the atmospheric temperature and the shallow water temperature; simultaneously acquiring parameters of atmospheric temperature and shallow water temperature of typical meteorological year chronogenesis, and acquiring temperature harmonic functions of the atmospheric temperature and the shallow water temperature;
the second module is configured to construct a resistance-capacitance calculation model of a building and a seawater source heat pump system front-end water taking and heat exchanging system; the seawater temperature harmonic function is delayed in phase and attenuated in amplitude compared with the atmospheric temperature harmonic function, the seawater temperature is related to the heat discharge amount of the system, the lower the seawater temperature is, the larger the EER is, and the EER of the system is a relatively higher value at 14 points, so that the appropriate reduction can be carried out when the unit capacity is selected, and a resistance-capacitance calculation model is constructed; the resistance-capacitance calculation model outputs a heat exchange thermal process supply and demand energy flow harmonic function to cooperate with the heat exchange process supply and demand energy flow harmonic function response characteristics according to the obtained temperature harmonic function;
a third module configured to obtain an energy flow harmonic function; under the working condition of the whole year, combining the response characteristics of the harmonic functions of the energy flow supplied and required by the thermal process of the building and the front-end heat exchanger, and bringing the harmonic functions into a resistance-capacitance calculation model of a front-end water taking and heat exchanging subsystem of the building and the sea water source heat pump system according to the typical annual air and sea water temperature harmonic functions to calculate the harmonic functions of the energy flow supplied and required by the thermal process of the front-end water taking and heat exchanging subsystem of the building and the sea water source heat pump system; the change amplitude difference of the two temperature harmonic functions of the air and the seawater is a temperature value corresponding to the difference between the highest values of an air temperature curve and a water temperature curve and a temperature value corresponding to the difference between the lowest values of the air temperature curve and the water temperature curve;
the fourth module is configured to construct a seawater source heat pump system unit design model selection framework; the method comprises the steps of taking the variation amplitude difference of a thermal process required energy flow harmonic function of a whole-year building subsystem and a thermal process supplied energy flow harmonic function of a water-taking and heat-exchanging subsystem at the front end of a seawater source heat pump system as a desired value, ensuring that the inlet temperature of a heat medium of heat exchange equipment is set as a designed water supply temperature under a rated working condition, taking the deviation of the power and the desired value of a unit as an optimization target, ensuring that the supplied energy of the unit at each moment all the year is greater than the desired value, and selecting the type and number of water source heat pump units to construct a seawater source heat pump system unit design and type selection method; the expected value is the change amplitude difference of two energy flow harmonic functions of the building subsystem and the seawater source front-end water taking and heat exchanging subsystem, and the change amplitude difference is the energy flow value corresponding to the difference between the highest values of the building demand curve and the front-end supply curve; and the energy value corresponding to the difference value is the expected value of the cold and heat load of the system.
7. A computer-readable storage medium having stored therein a plurality of instructions adapted to be loaded by a processor of a terminal device and to perform a method of constructing a seawater-source heat pump system according to any one of claims 1 to 5.
8. A terminal device comprising a processor and a computer-readable storage medium, the processor being configured to implement instructions; a computer readable storage medium for storing a plurality of instructions adapted to be loaded by a processor and to perform a method of constructing a seawater source heat pump system as claimed in any of claims 1-5.
9. A seawater source heat pump system, characterized in that the method of constructing a seawater source heat pump system according to any one of claims 1-5 is performed;
or the like, or, alternatively,
comprising the computer-readable storage medium of claim 7;
or the like, or, alternatively,
comprising a terminal device according to claim 8.
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