CN118572740A - A cold, heat and electricity storage and supply system based on comprehensive energy - Google Patents

Abstract

The present invention discloses a cold, heat and electricity storage supply system based on comprehensive energy, including a power supply system and a cold and hot water supply system, the power supply system includes: a natural energy power generation mechanism, an energy storage battery, a water electrolysis hydrogen production mechanism, a hydrogen storage device, and a fuel cell; the natural energy power generation mechanism and the energy storage battery can supply power to users; the cold and hot water supply system includes a cold and hot water tank, and the hot water tank is connected to a first heat exchanger and a second heat exchanger; the cooling water in the electrolyzer enters the first heat exchanger to release heat and then flows back to the electrolyzer for refrigeration; the cooling water in the fuel cell enters the second heat exchanger to release heat and then flows back to the fuel cell for refrigeration; a water pipe is arranged between the cold water tank and the hot water tank; the cold water tank is connected to a geothermal heat exchange module and a third heat exchanger, and the second heat exchanger and the third heat exchanger are connected to the user's indoor temperature control mechanism. The advantages of the present invention are: the utilization of renewable resources is maximized, and zero-pollution clean energy is provided.

Description

A cold, heat and electricity storage and supply system based on comprehensive energy

Technical Field

The invention relates to the technical field of cold, heat and electricity storage supply systems.

Background Art

Wind energy, solar energy, and geothermal resources are energy sources that humans can obtain. However, there are problems with storage. At present, wind energy and solar energy are mainly stored in batteries or directly generate electricity. Geothermal resources use geothermal heat pumps to provide heating and cooling for users. Water electrolysis hydrogen production equipment can use wind energy and solar energy to electrolyze water to produce hydrogen and store energy in hydrogen. Fuel cells are devices that convert hydrogen into electrical energy and thermal energy.

In order to provide users with zero-pollution clean energy and solve the heating and electricity problems of household users, the applicant has developed a combined cooling, heating and electricity system based on integrated energy, which couples several new energy sources together to maximize the utilization of renewable energy.

Summary of the invention

The technical problem to be solved by the present invention is to provide a cold, heat and electricity storage and supply system based on integrated energy, which couples natural energy such as wind energy, solar energy and hydrogen energy together to maximize the utilization of renewable resources and provide users with zero-pollution clean energy.

In order to solve the above problems, the technical solution adopted by the present invention is: a cold, heat and electricity storage and supply system based on comprehensive energy, including a power supply system and a cold and hot water supply system.

The power supply system includes: a natural energy power generation mechanism, an energy storage battery, a water electrolysis hydrogen production mechanism, a hydrogen storage device, and a fuel cell; the electric energy generated by the natural energy power generation mechanism can be supplied to the energy storage battery and the user through an inverter, the hydrogen produced by the water electrolysis hydrogen production mechanism is stored in the hydrogen storage device, the hydrogen storage device can supply hydrogen to the fuel cell, and the electric energy generated by the fuel cell is stored in the energy storage battery; the energy storage battery can supply power to the water electrolysis hydrogen production mechanism and the user; the water electrolysis hydrogen production mechanism includes an electrolyzer and a purification mechanism.

The hot and cold water supply system includes a cold water tank and a hot water tank. The water temperature in the cold water tank is controlled at no more than 26°C, and the water temperature in the hot water tank is controlled at no less than 50°C.

The hot water tank is provided with a hot water output pipe for providing hot water to users. The hot water tank is connected to the first heat exchanger and the second heat exchanger, and the first heat exchanger and the second heat exchanger supply heat to the hot water tank. The cooling water used as the cooling medium in the electrolytic cell absorbs the heat generated by the electrolytic cell and then enters the first heating medium pipe in the first heat exchanger. After releasing the heat, it flows back from the first heating medium pipe to the electrolytic cell for cooling.

The cooling water used as the cooling medium in the fuel cell absorbs the heat generated by the fuel cell and then enters the second heating medium pipe in the second heat exchanger. After releasing the heat, it flows back from the second heating medium pipe to the fuel cell for cooling.

The cold water tank is provided with a water supply pipe and a cold water output pipe for providing cold water to users. A first water pipe with a control valve and a pump and a second water pipe with a control valve and a pump are provided between the cold water tank and the hot water tank. The hot water in the hot water tank can enter the cold water tank through the first water pipe, and the water in the cold water tank can enter the hot water tank through the second water pipe.

The cold water tank is connected to the geothermal heat exchange module and the third heat exchanger. The buried depth of the geothermal heat exchange module is controlled at 10 to 35 meters below the ground surface. The water in the cold water tank enters the geothermal heat exchange module for cooling and then flows back to the cold water tank; the water in the cold water tank enters the third heat exchanger as a cooling medium; the second heat exchanger and the third heat exchanger are connected to the user's indoor temperature control mechanism.

The structure of the indoor temperature control mechanism includes: an indoor temperature control medium output main pipe with a pump and an indoor temperature control medium return main pipe, and the indoor temperature control medium output main pipe is respectively connected to an indoor heating delivery pipe with a control valve and an indoor cooling delivery pipe with a control valve.

The indoor heating delivery pipe is connected to the input end of the indoor temperature control medium heat exchange pipe in the second heat exchanger, and the output end of the indoor temperature control medium heat exchange pipe is connected to the indoor temperature control medium return main pipe through the indoor heating return pipe with a control valve.

The indoor cooling delivery pipe is connected to the input end of the third heat exchanger cooled medium pipe in the third heat exchanger, and the output end of the third heat exchanger cooled medium pipe is connected to the indoor temperature regulating medium return main pipe through the indoor cooling return pipe.

Furthermore, the aforementioned cold, heat and electricity storage and supply system based on integrated energy, wherein the structure of the geothermal heat exchange module comprises: a plurality of fin tube heat exchange units connected in series in sequence, the structure of each fin tube heat exchange unit comprises: a top mounting block and a bottom mounting block arranged at the upper and lower parts, a cooling water pipe is arranged between the top mounting block and the bottom mounting block, the cooling water pipe comprises two arc-shaped cooling water pipes arranged opposite to each other and having a circular arc cross section, a notch is left between the two arc-shaped cooling water pipes, the tops of the two arc-shaped cooling water pipes are closed, a water inlet port is arranged at the top of one of the arc-shaped cooling water pipes, a water outlet port is arranged at the top of the other arc-shaped cooling water pipe, and an arc-shaped through groove corresponding to the two arc-shaped cooling water pipes is opened on the top mounting block, The upper ends of the two arc-shaped cooling water pipes are respectively extended into the two arc-shaped grooves of the top mounting block, the upper end of each arc-shaped cooling water pipe is blocked and fixed in the corresponding arc-shaped groove, and the water inlet port and the water outlet port respectively extend out of the corresponding arc-shaped groove; an annular connecting groove is provided on the bottom mounting block, and the lower ends of the two arc-shaped cooling water pipes are open and are respectively welded and fixedly connected to the connecting grooves.

The water outlet port of the two adjacent fin tube heat exchange units is connected with the water inlet port of the rear fin tube heat exchange unit. The cold water tank is provided with a geothermal module connecting pipe with a pump and a geothermal module return pipe. The fin tube heat exchange units connected in series, the water inlet port of the fin tube heat exchange unit located at the front end of the water inlet is connected with the geothermal module connecting pipe, and the water outlet port of the fin tube heat exchange unit located at the end of the water inlet is connected with the geothermal module return pipe.

Furthermore, in the aforementioned integrated energy-based cold, heat and electricity storage and supply system, the bottom of each bottom mounting block is in a cone shape with a diameter gradually decreasing from top to bottom.

Furthermore, in the aforementioned integrated energy-based combined cooling, heating and power system, the connection structure between the electrolytic cell and the first heat exchanger includes: an electrolytic cell cooling medium output pipe and an electrolytic cell cooling medium return pipe with a pump are provided on the electrolytic cell, the electrolytic cell cooling medium output pipe and the electrolytic cell cooling medium return pipe are respectively connected to the two ends of the first heating medium pipe in the first heat exchanger, and a first bypass pipe with a first bypass flow regulating valve is also connected between the electrolytic cell cooling medium output pipe and the electrolytic cell cooling medium return pipe.

Furthermore, in the aforementioned cold, heat and electricity storage and supply system based on integrated energy, the connection structure between the fuel cell and the second heat exchanger includes: a fuel cell cooling medium output pipe and a fuel cell cooling medium return pipe with a pump are provided on the fuel cell, the fuel cell cooling medium output pipe and the fuel cell cooling medium return pipe are respectively connected to the two ends of the second heating medium pipe in the second heat exchanger, and a second bypass pipe with a second bypass flow regulating valve is also connected between the fuel cell cooling medium output pipe and the fuel cell cooling medium return pipe.

Furthermore, in the aforementioned integrated energy-based cold, heat and electricity storage and supply system, the natural energy power generation mechanism includes a photovoltaic power generation mechanism and a wind power generation mechanism.

Furthermore, in the aforementioned integrated energy-based cold, heat and electricity storage supply system, the natural energy power generation mechanism and the energy storage battery supply power to users to meet the following logic:

When the electricity generated by the natural energy power generation mechanism meets the needs of users and there is still surplus electricity, the natural energy power generation mechanism supplies electricity to users, and the surplus electricity is transmitted to the energy storage battery for storage. When the amount of electricity in the energy storage battery is greater than or equal to the hydrogen production threshold of the energy storage electricity, the energy storage battery supplies electricity to the water electrolysis hydrogen production mechanism, so that the water electrolysis hydrogen production mechanism electrolyzes and produces hydrogen. When the amount of electricity in the energy storage battery is less than or equal to the hydrogen production stop threshold of the energy storage electricity, the energy storage battery stops supplying electricity to the water electrolysis hydrogen production mechanism, and the water electrolysis hydrogen production mechanism stops producing hydrogen. When the amount of electricity in the energy storage battery reaches the maximum threshold of the energy storage electricity, the natural energy power generation mechanism stops charging the energy storage battery.

When the electricity generated by the natural energy power generation mechanism cannot meet the needs of users, the natural energy power generation mechanism and the energy storage battery jointly supply electricity to the user; when the power of the energy storage battery is greater than the energy storage power stop hydrogen production threshold, the energy storage battery supplies power to the user and the water electrolysis hydrogen production mechanism, when the power in the energy storage battery reaches the energy storage power minimum threshold, the fuel cell works to transmit electricity to the energy storage battery, and when the power in the energy storage battery is greater than or equal to the energy storage power fuel cell charging stop threshold, the fuel cell stops transmitting electricity to the energy storage battery; the above-mentioned energy storage power hydrogen production threshold, energy storage power stop hydrogen production threshold, energy storage power maximum threshold, energy storage power minimum threshold, and energy storage power fuel cell charging stop threshold are all preset and satisfy the following relationship:

The minimum threshold of energy storage capacity is less than the threshold for stopping charging of the energy storage fuel cell. The threshold for stopping hydrogen production is less than the threshold for stopping hydrogen production. The threshold for hydrogen production is less than the maximum threshold of energy storage capacity.

Furthermore, in the aforementioned cold, heat and electricity storage and supply system based on integrated energy, temperature sensors for detecting water temperature are respectively provided on the hot water tank and the cold water tank.

Furthermore, in the aforementioned cold, heat and electricity storage and supply system based on integrated energy, the cold water tank is also connected to the fourth heat exchanger, and the purification mechanism in the water electrolysis hydrogen production mechanism includes a hydrogen cooling mechanism for condensing and removing water from hydrogen, and the hydrogen cooling mechanism is provided with a hydrogen cooling medium output pipe and a hydrogen cooling medium return pipe with a pump, and the hydrogen cooling medium output pipe and the hydrogen cooling medium return pipe are respectively connected to the two ends of the fourth heat exchanger cooled medium pipe in the fourth heat exchanger, and the temperature of the hydrogen cooling medium in the hydrogen cooling mechanism rises after cooling the hydrogen, and the hydrogen cooling medium with increased temperature enters the cooled medium pipe of the fourth heat exchanger for cooling, and the cooled hydrogen cooling medium flows back to the hydrogen cooling mechanism through the hydrogen cooling medium return pipe for refrigeration.

Furthermore, in the aforementioned integrated energy-based cold, heat and electricity storage and supply system, an electric heating module is also provided in the hot water tank.

Furthermore, in the aforementioned integrated energy-based cold, heat and electricity storage and supply system, the water temperature in the cold water tank is controlled at 20-25°C, and the water temperature in the hot water tank is controlled at 55-60°C.

Furthermore, in the aforementioned integrated energy-based cold, heat and electricity storage and supply system, the burial depth of the geothermal heat exchange module is controlled at 18 to 30 meters below the surface.

Advantages of the present invention: The cold, heat and electricity storage and supply system based on comprehensive energy described in this application couples wind energy, light energy and hydrogen energy together through natural energy such as wind power, photovoltaics and geothermal energy, maximizes the utilization of renewable resources, and provides users with zero-pollution clean energy. In addition, the system solves the technical problem of short-term insufficient natural energy through energy management optimization and realizes the full utilization of natural energy. The energy storage battery solves the problem of short-term energy storage, and the hydrogen produced by the water electrolysis hydrogen production mechanism solves the problem of long-term energy storage. The combination of short-term energy storage and long-term energy storage not only makes full use of natural energy, but also can more effectively meet the energy needs of users.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the power supply principle of a cold, heat and electricity storage and supply system based on integrated energy according to the present invention.

FIG2 is a schematic diagram of the principle structure of a cold and hot water supply system in a cold, heat and electricity storage and supply system based on comprehensive energy as described in the present invention.

3 is a schematic diagram of the structure of a cooling water pipe in a fin tube heat exchange unit in a cold, heat and electricity storage and supply system based on integrated energy as described in the present invention.

FIG4 is a schematic diagram of the structure of a geothermal heat exchange module in a cold, heat and electricity storage and supply system based on integrated energy according to the present invention.

FIG. 5 is a schematic diagram of the connection structure between the cooling water pipe and the top mounting block as viewed from above.

FIG6 is a schematic diagram showing the relative proportion of different power thresholds in an energy storage battery to the total power that can be stored in the energy storage battery.

DETAILED DESCRIPTION

The present invention is further described in detail below in conjunction with the accompanying drawings and preferred embodiments.

As shown in FIG. 1 and FIG. 2 , a cold, heat and electricity storage and supply system based on integrated energy includes a power supply system and a cold and hot water supply system.

The power supply system includes: a natural energy power generation mechanism 1, an energy storage battery 2, a water electrolysis hydrogen production mechanism 3, a hydrogen storage device 4, and a fuel cell 5. The electric energy generated by the natural energy power generation mechanism 1 is supplied to the energy storage battery 2 and the user through an inverter. The hydrogen produced by the water electrolysis hydrogen production mechanism 3 is stored in the hydrogen storage device 4, and the hydrogen storage device 4 can supply hydrogen to the fuel cell 5. The electric energy generated by the fuel cell 5 is stored in the energy storage battery 2. The energy storage battery 2 can supply power to the water electrolysis hydrogen production mechanism 3 and the user; the water electrolysis hydrogen production mechanism 3 includes an electrolytic cell 31 and a purification mechanism 32. The energy storage battery 2 can be a lithium battery.

The following is an introduction to the hot and cold water supply system.

The hot and cold water supply system includes a cold water tank 6 and a hot water tank 7. The water temperature in the cold water tank 6 is controlled at 20°C to 25°C, and the water temperature in the hot water tank 7 is controlled at 55°C to 60°C. A hot water tank temperature sensor 702 for detecting the water temperature is provided on the hot water tank 7. A cold water tank temperature sensor 601 for detecting the water temperature is provided on the cold water tank 6.

The hot water tank 7 is provided with a hot water output pipe 701 for providing hot water to users. The hot water tank 7 is connected to the first heat exchanger 8 and the second heat exchanger 9 , and the first heat exchanger 8 and the second heat exchanger 9 provide heat for the hot water tank 7 .

The cooling water used as the cooling medium in the electrolytic cell 31 absorbs the heat generated by the electrolytic cell 31 and then enters the first heating medium pipe 81 in the first heat exchanger 8, and then flows back from the first heating medium pipe 81 to the electrolytic cell 31 for refrigeration after releasing the heat. Specifically, the connection structure between the electrolytic cell 31 and the first heat exchanger 8 includes: an electrolytic cell cooling medium output pipe 311 with a first water pump 312 and an electrolytic cell cooling medium return pipe 313 are provided on the electrolytic cell 31, and the electrolytic cell cooling medium output pipe 311 and the electrolytic cell cooling medium return pipe 313 are respectively connected to the two ends of the first heating medium pipe 81 in the first heat exchanger 8, and a first bypass pipe 314 with a first bypass flow regulating valve 315 is also connected between the electrolytic cell cooling medium output pipe 311 and the electrolytic cell cooling medium return pipe 313. The purpose of setting the first bypass pipe 314 is that when the temperature in the hot water tank 7 is too high, the first bypass flow regulating valve 315 on the first bypass pipe 314 can be opened to allow a portion of the cooling water discharged from the electrolytic cell 31 as a cooling medium after the temperature rises to flow back to the electrolytic cell cooling medium return pipe 313 through the first bypass pipe 314, thereby preventing the water temperature in the hot water tank 7 from being too high. The flow in the first bypass pipe 314 is adjusted by adjusting the opening of the first bypass flow regulating valve 315, so as to better control the temperature in the hot water tank 7.

The provision of the first heat exchanger 8 enables full utilization of the heat generated in the electrolytic cell 31, thereby lowering the energy consumption of the entire combined cooling, heating and power generation system based on comprehensive energy, and enabling full utilization of energy.

The cooling water used as the cooling medium in the fuel cell 5 absorbs the heat generated by the fuel cell 5 and then enters the second heating medium pipe 91 in the second heat exchanger 9, and then flows back from the second heating medium pipe 91 to the fuel cell 5 for cooling after releasing the heat. Specifically, the connection structure between the fuel cell 5 and the second heat exchanger 9 includes: a fuel cell cooling medium output pipe 51 with a second water pump 511 and a fuel cell cooling medium return pipe 52 are provided on the fuel cell 5, the fuel cell cooling medium output pipe 51 and the fuel cell cooling medium return pipe 52 are respectively connected to the two ends of the second heating medium pipe 91 in the second heat exchanger 9, and a second bypass pipe 53 with a second bypass flow regulating valve 54 is also connected between the fuel cell cooling medium output pipe 51 and the fuel cell cooling medium return pipe 52. The purpose of setting the second bypass pipe 53 is that when the temperature in the hot water tank 7 is too high, the second bypass flow regulating valve 54 on the second bypass pipe 53 can be opened to allow a portion of the cooling water discharged from the fuel cell 5 as the cooling medium after the temperature rises to flow back to the fuel cell cooling medium return pipe 52 through the second bypass pipe 53, thereby preventing the water temperature in the hot water tank 7 from being too high. The flow in the second bypass pipe 53 is adjusted by adjusting the opening of the second bypass flow regulating valve 54, so as to better control the temperature in the hot water tank 7.

In order to ensure that the water temperature in the hot water tank 7 is always maintained at 55°C to 60°C, an electric heating module 703 is provided in the hot water tank 7. The electric heating module 703 can be powered by the energy storage battery 5. The electric heating module 703 can quickly heat the hot water tank 7 and can also serve as a supplement to the heat supply of the electrolyzer 31 and the fuel cell 5.

The provision of the second heat exchanger 9 realizes full utilization of the heat generated in the fuel cell 5, so that the energy consumption of the entire combined cooling, heating and electricity system based on comprehensive energy is further reduced, and energy can be further fully utilized.

The cold water tank 6 is provided with a water supply pipe 61 and a cold water output pipe 62 for providing cold water to the user, and a first water pipe 63 with a first water pipe control valve 631 and a third water pump 632 and a second water pipe 64 with a second water pipe control valve 641 and a fourth water pump 642 are provided between the cold water tank 6 and the hot water tank 7. The hot water in the hot water tank 7 can enter the cold water tank 6 through the first water pipe 63, and the water in the cold water tank 6 can enter the hot water tank 7 through the second water pipe 64.

The water in the hot water tank 7 is replenished by the cold water tank 6 through the second water pipe 64. When the temperature in the cold water tank 6 is too low, below 20°C, the hot water in the hot water tank 7 is input into the cold water tank 6 through the first water pipe 63.

The cold water tank 6 is connected to the geothermal heat exchange module 130 and the third heat exchanger 14 .

The buried depth of the geothermal heat exchange module 130 is controlled to be 20 to 35 meters below the ground surface. The water in the cold water tank 6 enters the geothermal heat exchange module 130, cools, and then flows back to the cold water tank 6; the water in the cold water tank 6 enters the third heat exchanger 14 as a cooling medium. The buried depth of the geothermal heat exchange module 130 is controlled to be 10 to 35 meters below the ground surface, preferably 18 to 30 meters, to ensure that the water in the cold water tank 6 is adjusted to a temperature of 20°C to 25°C after heat exchange through the geothermal heat exchange module 130.

The second heat exchanger 9 and the third heat exchanger 14 are connected to a user's indoor temperature control mechanism 15 .

The structure of the indoor temperature control mechanism 15 includes: an indoor temperature control medium output main pipe 151 with a temperature control water pump 1511 and an indoor temperature control medium return main pipe 152, and the indoor temperature control medium output main pipe 151 is respectively connected to an indoor heating delivery pipe 153 with an indoor heating control valve 1531 and an indoor cooling delivery pipe 154 with an indoor cooling control valve 1541. The indoor heating delivery pipe 153 is connected to the input end of the indoor temperature control medium heat exchange pipe 92 in the second heat exchanger 9, and the output end of the indoor temperature control medium heat exchange pipe 92 is connected to the indoor temperature control medium return main pipe 152 through an indoor heating return pipe 155 with a control valve.

The indoor cooling delivery pipe 154 is connected to the input end of the third heat exchanger cooled medium pipe 141 in the third heat exchanger 14, and the output end of the third heat exchanger cooled medium pipe 141 is connected to the indoor temperature control medium return main pipe 152 through the indoor cooling return pipe 156.

The indoor temperature adjustment mechanism 15 makes full use of the coldness of the cold water tank 6 and the heat of the hot water tank 7, so that it can be used to adjust the indoor temperature of the user, such as heating in winter and cooling in summer.

In addition, in order to further reduce energy consumption and improve energy utilization efficiency, the cold water tank 6 in this embodiment is also connected to the fourth heat exchanger 16, and the purification mechanism 32 in the water electrolysis hydrogen production mechanism 3 includes a hydrogen cooling mechanism 321 for condensing and removing water from hydrogen. The hydrogen cooling mechanism 321 is provided with a hydrogen cooling medium output pipe 3211 with a pump and a hydrogen cooling medium return pipe 3212. The hydrogen cooling medium output pipe 3211 and the hydrogen cooling medium return pipe 3212 are respectively connected to the two ends of the fourth heat exchanger cooled medium pipe 161 in the fourth heat exchanger 16. The hydrogen cooling medium in the hydrogen cooling mechanism 321 cools the hydrogen and the temperature rises. The hydrogen cooling medium with the increased temperature enters the fourth heat exchanger cooled medium pipe 161 for cooling. The cooled hydrogen cooling medium flows back to the hydrogen cooling mechanism 321 through the hydrogen cooling medium return pipe 3212 for refrigeration.

As shown in Figures 3, 4 and 5, the structure of the geothermal heat exchange module 130 includes: a plurality of fin tube heat exchange units 13 connected in series in sequence, and the structure of each fin tube heat exchange unit 13 includes: a top mounting block 131 and a bottom mounting block 132 arranged at the upper and lower parts, and a cooling water pipe is arranged between the top mounting block 131 and the bottom mounting block 132, and the cooling water pipe includes two arc-shaped cooling water pipes 133 arranged opposite to each other and having a circular arc cross-section, and a notch 134 is left between the two arc-shaped cooling water pipes 133, and the tops of the two arc-shaped cooling water pipes 133 are closed, and a water inlet port 135 is arranged at the top of one of the arc-shaped cooling water pipes 133, and a water outlet port 136 is arranged at the top of the other arc-shaped cooling water pipe. The top mounting block 131 is provided with arc-shaped through grooves 137 corresponding to the two arc-shaped cooling water pipes. The upper ends of the two arc-shaped cooling water pipes 133 extend into the two arc-shaped through grooves 137 of the top mounting block 131 respectively. The upper end of each arc-shaped cooling water pipe 133 is blocked and fixed in the corresponding arc-shaped through groove 137, and the water inlet port 135 and the water outlet port 136 extend out of the corresponding arc-shaped through groove 137 respectively, so as to facilitate the connection of the pipeline. The bottom mounting block 132 is provided with an annular connecting groove 138. The lower ends of the two arc-shaped cooling water pipes 133 are open and are respectively connected to the connecting grooves 138 by welding. In order to facilitate the fixing of the cooling water pipes under the ground surface, the bottom of each bottom mounting block 132 in this embodiment is a cone with a gradually decreasing diameter from top to bottom. External heat dissipation fins 139 are spirally arranged on the outer walls of the two arc-shaped cooling water pipes 133 , and internal heat dissipation fins 140 are spirally arranged on the inner walls of the two arc-shaped cooling water pipes 133 .

For every two adjacent fin tube heat exchange units 13, the water outlet port 136 of the previous fin tube heat exchange unit 13 is connected to the water inlet port 135 of the subsequent fin tube heat exchange unit 13, and the cold water tank 6 is provided with a geothermal module connecting pipe 65 with a water inlet pump 651 and a geothermal module return pipe 66. Among the fin tube heat exchange units 13 connected in series, the water inlet port 135 of the fin tube heat exchange unit 13 located at the front end of the water inlet is connected to the geothermal module connecting pipe 65, and the water outlet port 136 of the fin tube heat exchange unit 13 located at the end of the water inlet is connected to the geothermal module return pipe 66.

The number of finned tube heat exchange units 13 in the above-mentioned geothermal heat exchange module 130 can be set according to actual conditions. A two-piece cooling water pipe is adopted, and the water in the cold water tank 6 first enters one arc-shaped cooling water pipe 133, and then enters another arc-shaped cooling water pipe 133 from the bottom, which effectively increases the heat exchange path, thereby greatly improving the heat exchange efficiency, so that the water in the geothermal heat exchange module 130 from the cold water tank 6 can fully exchange heat below the surface. The shape of the arc-shaped cooling water pipe 133 also increases the area of the inner and outer pipe walls, thereby further increasing the heat exchange area.

Since the inner walls of the two arc-shaped cooling water pipes 133 are provided with internal heat dissipation fins 140, and the outer walls thereof are provided with external heat dissipation fins 139, the heat exchange area is effectively increased, so the cooling water pipes of this structure can further effectively improve the heat exchange effect, thereby being able to better and more fully utilize the geothermal energy. The notch 134 between the two arc-shaped cooling water pipes 133 provides conditions for the surface energy to pass through the two arc-shaped cooling water pipes 133, and also enables the internal heat dissipation fins 140 to exchange heat more effectively. Therefore, the structure of the geothermal heat exchange module 130 described in the present application is simple in structure, can fully utilize the geothermal energy, and can effectively ensure that the water temperature in the cold water tank 6 can be stabilized at 20°C to 25°C.

From the above introduction, it can be seen that the power supply system of the combined cooling, heating and electricity system based on comprehensive energy described in the present application provides electric energy to users through a natural energy power generation mechanism 1 and an energy storage battery 2, and the entire electric energy supply is pollution-free.

The present invention application describes a combined cooling, heating and power system based on integrated energy, in which the cold water tank 6 in the hot and cold water supply system provides cold water to users through the geothermal heat exchange module 130, and can provide refrigeration for users through the indoor temperature control mechanism 15; at the same time, the cold water tank 6 can also provide cooling for the hydrogen cooling mechanism 321 in the purification mechanism 32 in the water electrolysis hydrogen production mechanism 3.

The hot water tank 7 in the hot and cold water supply system fully utilizes the heat generated by the electrolytic cell 31 and the fuel cell 5 , and can provide heating for the user through the indoor temperature control mechanism 15 .

Embodiment 2: As shown in FIG. 1 and FIG. 6 , this embodiment further adds the working logic of the natural energy power generation mechanism 1 and the energy storage battery 2 when supplying power to the user, compared with Embodiment 1. The specific working logic is as follows.

When the electricity generated by the natural energy power generation mechanism meets the needs of users and there is still surplus electricity, the natural energy power generation mechanism 1 supplies electricity to the user, and the surplus electricity is transmitted to the energy storage battery 2 for storage. When the amount of electricity in the energy storage battery 2 is greater than or equal to the energy storage electricity hydrogen production threshold S4, the energy storage battery 2 supplies electricity to the water electrolysis hydrogen production mechanism 3, so that the water electrolysis hydrogen production mechanism 3 electrolyzes and produces hydrogen. When the amount of electricity in the energy storage battery 2 is less than or equal to the energy storage electricity hydrogen production stop threshold S3, the energy storage battery 2 stops supplying electricity to the water electrolysis hydrogen production mechanism 3, and the water electrolysis hydrogen production mechanism 3 stops producing hydrogen; when the amount of electricity in the energy storage battery 2 is greater than or equal to the energy storage electricity maximum threshold S5, the natural energy power generation mechanism 1 stops charging the energy storage battery 2;

When the electricity generated by the natural energy power generation mechanism 1 cannot meet the needs of users, the natural energy power generation mechanism 1 and the energy storage battery 2 jointly supply electricity to the user; when the power of the energy storage battery 2 is greater than the energy storage power stop hydrogen production threshold S3, the energy storage battery 2 supplies power to the user and the water electrolysis hydrogen production mechanism 3, when the power in the energy storage battery 2 is less than or equal to the energy storage power minimum threshold S1, the fuel cell 5 works to transmit electricity to the energy storage battery 2, and when the power in the energy storage battery 2 is greater than or equal to the energy storage power fuel cell charging stop threshold S2, the fuel cell 5 stops transmitting electricity to the energy storage battery 2.

The above-mentioned energy storage power hydrogen production threshold S4, energy storage power hydrogen production stop threshold S3, energy storage power maximum threshold S5, energy storage power minimum threshold S1, energy storage power fuel cell charging stop threshold S2 are all preset and satisfy the following relationship:

The minimum energy storage capacity threshold S1 is less than the energy storage capacity fuel cell charging stop threshold S2 is less than the energy storage capacity hydrogen production stop threshold S3 is less than the energy storage capacity hydrogen production threshold S4 is less than the maximum energy storage capacity threshold S5.

Typically, the set minimum energy storage power threshold S1 is 5% to 10% of the total power that the energy storage battery 2 can store, the energy storage power fuel cell charging stop threshold S2 is 40% to 50% of the total power that the energy storage battery 2 can store, the energy storage power hydrogen production stop threshold S3 is 60% to 70% of the total power that the energy storage battery 2 can store, the energy storage power hydrogen production threshold S4 is 80% to 90% of the total power that the energy storage battery 2 can store, and the energy storage power maximum threshold S5 is 95% to 99% of the total power that the energy storage battery 2 can store.

The natural energy power generation mechanism 1 and the energy storage battery 2 use the above logic to supply power to users, and their purpose is to optimize energy management, thereby maximizing the use of natural energy, solving the technical problem of short-term insufficient natural energy, and further making full use of natural energy. The energy storage battery 2 solves the problem of short-term energy storage, and the hydrogen produced by the water electrolysis hydrogen production mechanism 3 solves the problem of long-term energy storage. The combination of short-term energy storage and long-term energy storage not only makes full use of natural energy, but also can more effectively meet the energy needs of users.

The above-mentioned cold, heat and electricity storage and supply system based on comprehensive energy, through natural energy such as wind power, photovoltaic, geothermal, etc., couples wind energy, light energy and hydrogen energy together to maximize the utilization of renewable resources and provide users with zero-pollution clean energy. In addition, the system solves the technical problem of short-term insufficient natural energy through energy management optimization and realizes the full utilization of natural energy. The energy storage battery 2 solves the short-term energy storage, and the hydrogen produced by the water electrolysis hydrogen production mechanism 3 solves the long-term energy storage. The combination of short-term energy storage and long-term energy storage not only makes full use of natural energy, but also can more effectively meet the energy needs of users.

Claims (12)

1. A cold, hot and electric storage and supply system based on comprehensive energy, characterized by: comprising a power supply system and a cold and hot water supply system, The power supply system includes: a natural energy power generation mechanism, an energy storage battery, a water electrolysis hydrogen production mechanism, a hydrogen storage device, and a fuel cell; the electric energy generated by the natural energy power generation mechanism can be supplied to the energy storage battery and the user through an inverter, the hydrogen produced by the water electrolysis hydrogen production mechanism is stored in the hydrogen storage device, the hydrogen storage device can supply hydrogen to the fuel cell, and the electric energy generated by the fuel cell is stored in the energy storage battery; the energy storage battery can supply power to the water electrolysis hydrogen production mechanism and the user; the water electrolysis hydrogen production mechanism includes an electrolyzer and a purification mechanism; The hot and cold water supply system includes a cold water tank and a hot water tank. The water temperature in the cold water tank is controlled at no more than 26°C, and the water temperature in the hot water tank is controlled at no less than 50°C; The hot water tank is provided with a hot water output pipe for providing hot water to users. The hot water tank is connected to the first heat exchanger and the second heat exchanger. The first heat exchanger and the second heat exchanger provide heat for the hot water tank. The cooling water used as cooling medium in the electrolytic cell absorbs the heat generated by the electrolytic cell and then enters the first heating medium pipe in the first heat exchanger, releases the heat and then flows back from the first heating medium pipe to the electrolytic cell for cooling; The cooling water used as the cooling medium in the fuel cell absorbs the heat generated by the fuel cell and then enters the second heating medium pipe in the second heat exchanger, and then flows back from the second heating medium pipe to the fuel cell for cooling after releasing the heat; The cold water tank is provided with a water supply pipe and a cold water output pipe for providing cold water to the user. A first water pipe with a control valve and a pump and a second water pipe with a control valve and a pump are provided between the cold water tank and the hot water tank. The hot water in the hot water tank can enter the cold water tank through the first water pipe, and the water in the cold water tank can enter the hot water tank through the second water pipe. The cold water tank is connected to the geothermal heat exchange module and the third heat exchanger. The buried depth of the geothermal heat exchange module is controlled at 10 to 35 meters below the ground surface. The water in the cold water tank enters the geothermal heat exchange module for cooling and then flows back to the cold water tank. The water in the cold water tank enters the third heat exchanger as a cooling medium. The second heat exchanger and the third heat exchanger are connected to the user's indoor temperature control mechanism. The structure of the indoor temperature control mechanism includes: an indoor temperature control medium output main pipe with a pump and an indoor temperature control medium return main pipe, the indoor temperature control medium output main pipe is respectively connected to an indoor heating delivery pipe with a control valve and an indoor cooling delivery pipe with a control valve, The indoor heating delivery pipe is connected to the input end of the indoor temperature control medium heat exchange pipe in the second heat exchanger, and the output end of the indoor temperature control medium heat exchange pipe is connected to the indoor temperature control medium return main pipe through the indoor heating return pipe with a control valve; The indoor cooling delivery pipe is connected to the input end of the third heat exchanger cooled medium pipe in the third heat exchanger, and the output end of the third heat exchanger cooled medium pipe is connected to the indoor temperature regulating medium return main pipe through the indoor cooling return pipe. 2. A cold, heat and electricity storage and supply system based on comprehensive energy according to claim 1, characterized in that: the structure of the geothermal heat exchange module includes: a plurality of fin tube heat exchange units connected in series in sequence, the structure of each fin tube heat exchange unit includes: a top mounting block and a bottom mounting block arranged at the top and the bottom, a cooling water pipe is arranged between the top mounting block and the bottom mounting block, the cooling water pipe includes two arc-shaped cooling water pipes arranged opposite to each other and having a circular arc cross-section, a notch is left between the two arc-shaped cooling water pipes, the tops of the two arc-shaped cooling water pipes are closed, a water inlet port is arranged at the top of one of the arc-shaped cooling water pipes, a water outlet port is arranged at the top of the other arc-shaped cooling water pipe, and an arc-shaped through groove corresponding to the two arc-shaped cooling water pipes is opened on the top mounting block, The upper ends of the two arc-shaped cooling water pipes are respectively extended into the two arc-shaped through grooves of the top mounting block, and the upper end of each arc-shaped cooling water pipe is blocked and fixed in the corresponding arc-shaped through groove, and the water inlet port and the water outlet port are respectively extended out of the corresponding arc-shaped through groove; an annular connecting groove is provided on the bottom mounting block, and the lower ends of the two arc-shaped cooling water pipes are open and are respectively welded and fixedly connected with the connecting groove; The water outlet port of the two adjacent fin tube heat exchange units is connected with the water inlet port of the rear fin tube heat exchange unit. The cold water tank is provided with a geothermal module connecting pipe with a pump and a geothermal module return pipe. The fin tube heat exchange units connected in series, the water inlet port of the fin tube heat exchange unit located at the front end of the water inlet is connected with the geothermal module connecting pipe, and the water outlet port of the fin tube heat exchange unit located at the end of the water inlet is connected with the geothermal module return pipe. 3. According to the integrated energy-based cold, heat and electricity storage and supply system of claim 2, the characteristic is that the bottom of each bottom mounting block is in a cone shape with a diameter gradually decreasing from top to bottom. 4. According to claim 1, a cold, heat and electricity storage and supply system based on integrated energy is characterized in that: the connection structure between the electrolytic cell and the first heat exchanger includes: an electrolytic cell cooling medium output pipe with a pump and an electrolytic cell cooling medium return pipe are provided on the electrolytic cell, the electrolytic cell cooling medium output pipe and the electrolytic cell cooling medium return pipe are respectively connected to the two ends of the first heating medium pipe in the first heat exchanger, and a first bypass pipe with a first bypass flow regulating valve is also connected between the electrolytic cell cooling medium output pipe and the electrolytic cell cooling medium return pipe. 5. According to claim 1, a cold, heat and electricity storage and supply system based on integrated energy is characterized in that: the connection structure between the fuel cell and the second heat exchanger includes: a fuel cell cooling medium output pipe and a fuel cell cooling medium return pipe with a pump are provided on the fuel cell, the fuel cell cooling medium output pipe and the fuel cell cooling medium return pipe are respectively connected to the two ends of the second heating medium pipe in the second heat exchanger, and a second bypass pipe with a second bypass flow regulating valve is also connected between the fuel cell cooling medium output pipe and the fuel cell cooling medium return pipe. 6. According to the integrated energy-based cold, heat and electricity storage and supply system of claim 1, it is characterized in that the natural energy power generation mechanism includes a photovoltaic power generation mechanism and a wind power generation mechanism. 7. A cold, heat and electricity storage and supply system based on comprehensive energy according to claim 6, characterized in that the natural energy power generation mechanism and the energy storage battery supply power to users in accordance with the following logic: When the electricity generated by the natural energy power generation mechanism meets the needs of users and there is still surplus electricity, the natural energy power generation mechanism supplies electricity to users, and the surplus electricity is transmitted to the energy storage battery for storage. When the amount of electricity in the energy storage battery is greater than or equal to the hydrogen production threshold of the energy storage electricity, the energy storage battery supplies electricity to the water electrolysis hydrogen production mechanism, so that the water electrolysis hydrogen production mechanism electrolyzes and produces hydrogen. When the amount of electricity in the energy storage battery is less than or equal to the hydrogen production stop threshold of the energy storage electricity, the energy storage battery stops supplying electricity to the water electrolysis hydrogen production mechanism, and the water electrolysis hydrogen production mechanism stops producing hydrogen. When the amount of electricity in the energy storage battery reaches the maximum threshold of the energy storage electricity, the natural energy power generation mechanism stops charging the energy storage battery. When the electricity generated by the natural energy power generation mechanism cannot meet the needs of users, the natural energy power generation mechanism and the energy storage battery jointly supply electricity to the user; when the power of the energy storage battery is greater than the energy storage power stop hydrogen production threshold, the energy storage battery supplies electricity to the user and the water electrolysis hydrogen production mechanism, when the power in the energy storage battery reaches the energy storage power minimum threshold, the fuel cell works to transmit electricity to the energy storage battery, and when the power in the energy storage battery is greater than or equal to the energy storage power fuel cell charging stop threshold, the fuel cell stops transmitting electricity to the energy storage battery; the above-mentioned energy storage power hydrogen production threshold, energy storage power stop hydrogen production threshold, energy storage power maximum threshold, energy storage power minimum threshold, and energy storage power fuel cell charging stop threshold are all preset and satisfy the following relationship: The minimum threshold of energy storage capacity is less than the threshold for stopping charging of the energy storage fuel cell. The threshold for stopping hydrogen production is less than the threshold for stopping hydrogen production. The threshold for hydrogen production is less than the maximum threshold of energy storage capacity. 8. A cold, heat and electricity storage and supply system based on integrated energy according to claim 1, characterized in that: a temperature sensor for detecting water temperature is respectively provided on the hot water tank and the cold water tank. 9. A cold, heat and electricity storage and supply system based on comprehensive energy according to claim 1, characterized in that: the cold water tank is also connected to the fourth heat exchanger, the purification mechanism in the water electrolysis hydrogen production mechanism includes a hydrogen cooling mechanism for condensing and removing water from hydrogen, and the hydrogen cooling mechanism is provided with a hydrogen cooling medium output pipe and a hydrogen cooling medium return pipe with a pump, the hydrogen cooling medium output pipe and the hydrogen cooling medium return pipe are respectively connected to the two ends of the fourth heat exchanger cooled medium pipe in the fourth heat exchanger, the hydrogen cooling medium in the hydrogen cooling mechanism cools the hydrogen and then the temperature rises, the hydrogen cooling medium after the temperature rises enters the fourth heat exchanger cooled medium pipe for cooling, and the cooled hydrogen cooling medium flows back to the hydrogen cooling mechanism through the hydrogen cooling medium return pipe for refrigeration. 10. A cold, hot and electricity storage and supply system based on integrated energy according to claim 1, characterized in that an electric heating module is also provided in the hot water tank. 11. A cold, hot and electricity storage and supply system based on comprehensive energy according to claim 1, characterized in that the water temperature in the cold water tank is controlled at 20-25°C, and the water temperature in the hot water tank is controlled at 55-60°C. 12. A cold, heat and electricity storage and supply system based on integrated energy according to claim 1, characterized in that the buried depth of the geothermal heat exchange module is controlled to be 18 to 30 meters below the surface.