CN217082999U - Photovoltaic power generation driven dual cycle refrigerating system - Google Patents
Photovoltaic power generation driven dual cycle refrigerating system Download PDFInfo
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- CN217082999U CN217082999U CN202220758001.2U CN202220758001U CN217082999U CN 217082999 U CN217082999 U CN 217082999U CN 202220758001 U CN202220758001 U CN 202220758001U CN 217082999 U CN217082999 U CN 217082999U
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Abstract
A double-circulation refrigeration system driven by photovoltaic power generation comprises a solar photovoltaic power station, a compressor unit, a condensing tower, a high-pressure liquid storage tank, a low-pressure liquid storage tank, a refrigerant liquid supply pump, a throttling expansion valve, an evaporator heat exchange device, a refrigerant return pipeline A, a low-pressure air pump, a low-pressure air storage tank, a refrigerant return pipeline B and an electromagnetic valve; the solar photovoltaic power station is connected with the compressor unit; the compressor unit, the condensing tower, the high-pressure liquid storage tank, the low-pressure liquid storage tank, the refrigerant liquid supply pump and the evaporator heat exchange device are sequentially connected through pipelines; a throttle expansion valve is arranged between the refrigerant liquid supply pump and the evaporator heat exchange device; the low-pressure air pump is connected with the low-pressure air storage tank and communicated with the top of the low-pressure liquid storage tank; the low-pressure gas storage tank is connected with the compressor unit through a refrigerant return pipeline B. The utility model discloses a utilize the photoelectric drive compressor, turn into the chemical molecule potential energy of refrigerant to solar energy, utilize photovoltaic power generation compression refrigerant stock solution daytime, utilize refrigerant low pressure circulation refrigeration night.
Description
Technical Field
The utility model belongs to the technical field of the refrigeration, be applied to among the freezer, concretely relates to photovoltaic power generation driven dual cycle refrigerating system.
Background
The existing refrigeration house system is a single-cycle refrigeration house which utilizes a national power grid as power supply, a compressor unit runs at full power as long as refrigeration work is carried out, the circulation of a refrigerant is driven by a compressor, the refrigerant in the system is less in consumption and does not have the function of energy storage regulation, peak staggering and valley avoiding cannot be carried out on the aspect of power utilization, and the electricity price and the energy consumption are also high. The generated energy is great when illumination is sufficient daytime in current photovoltaic power plant, but night or will the generated energy be not enough under the low illumination condition, need be equipped with rectification energy storage system and store the electric power that daytime high illumination was issued, then utilize rectification energy storage system to supply power night or under the low illumination condition. The construction input cost of the rectification energy storage system is large, the safety risk is large, energy loss exists after the photovoltaic power generation is subjected to rectification energy storage, and the efficiency is greatly reduced. Most of the existing cold storages have the building area of 300m 2 More than 30-40 cold storages are formed in the cold storage factory, and the roof resources are large and concentrated.
The defects of the prior art are mainly reflected in two aspects, namely, the single-cycle refrigeration of the prior refrigeration house has no energy storage adjusting function, the national power grid is used for supplying power, the efficiency is low, and the cost is high. Secondly, the existing photovoltaic power generation needs to be provided with a rectification energy storage system, the construction cost is high, certain potential safety hazards exist, the energy storage system needs to be subjected to twice energy rectification conversion, the power supply efficiency is low, and the photovoltaic power generation cannot be achieved. The utility model discloses an advantage mainly shows through utilizing freezer roof resource construction photovoltaic power plant, except that the operation that directly gives the freezer system provides power supply, can also utilize dual cycle freezer system to store electric power as the molecular potential energy of refrigerant, and safety ring protects high-efficiently again.
Disclosure of Invention
Based on the not enough of above-mentioned prior art, the utility model provides a photovoltaic power generation driven dual cycle refrigerating system.
The utility model discloses a realize through following technical scheme:
a double-circulation refrigeration system driven by photovoltaic power generation comprises a solar photovoltaic power station, a compressor unit, a condensing tower, a high-pressure liquid storage tank, a low-pressure liquid storage tank, a refrigerant liquid supply pump, a throttling expansion valve, an evaporator heat exchange device, a refrigerant return pipeline A, a low-pressure air pump, a low-pressure air storage tank, a refrigerant return pipeline B and an electromagnetic valve; wherein the content of the first and second substances,
the solar photovoltaic power station is connected with the compressor unit through a power line;
the compressor unit, the condensing tower, the high-pressure liquid storage tank, the low-pressure liquid storage tank, the refrigerant liquid supply pump and the evaporator heat exchange device are sequentially connected through pipelines; the throttle expansion valve is arranged between the refrigerant liquid supply pump and the evaporator heat exchange device;
the refrigerant return pipeline A is divided into two pipelines after being connected with the evaporator heat exchange device, wherein one pipeline is connected with a heat exchange pipeline in cooling water of the condensing tower and then enters the low-pressure liquid storage tank through the pipeline; the other pipeline is directly connected with the low-pressure liquid storage tank;
the low-pressure air pump is connected with the low-pressure air storage tank and communicated with the top of the low-pressure liquid storage tank; the low-pressure gas storage tank is connected with the compressor unit through the refrigerant return pipeline B.
Preferably, the solenoid valve includes: a first solenoid valve, a second solenoid valve, a third solenoid valve and a fourth solenoid valve; wherein the content of the first and second substances,
the first electromagnetic valve is arranged on a pipeline between the high-pressure liquid storage tank and the low-pressure liquid storage tank, the second electromagnetic valve is arranged on a pipeline connecting the refrigerant return pipeline A and the condensing tower heat exchange pipeline, the third electromagnetic valve is arranged on the refrigerant return pipeline B, and the fourth electromagnetic valve is arranged on a pipeline connecting the refrigerant return pipeline A and the low-pressure liquid storage tank.
Preferably, the system further comprises a controller, and the controller is respectively connected with the compressor unit, the condensing tower, the refrigerant liquid supply pump, the throttle expansion valve, the evaporator heat exchange device, the low-pressure air pump and the electromagnetic valve.
Preferably, pressure liquid level sensors are arranged in the high-pressure liquid storage tank and the low-pressure liquid storage tank and connected with the controller.
Preferably, the compressor unit is a parallel compressor unit and consists of a plurality of compressors.
Preferably, the condensing tower is an evaporative condensing tower.
Preferably, the high-pressure liquid storage tank is a three-level parallel high-pressure liquid storage tank.
Preferably, the low-pressure liquid storage tank is a four-stage parallel low-pressure liquid storage tank.
Preferably, the low-pressure liquid storage tank is coated with a heat-insulating layer.
Preferably, the first solenoid valve is a pressure reducing solenoid valve.
The utility model discloses utilize freezer roof construction photovoltaic power plant, the electricity of generating need not the energy storage during daytime high illumination, and direct supply freezer refrigerating system uses. The refrigerating system of the refrigeration house can efficiently convert the electric power generated by photovoltaic power generation into molecular potential energy of a refrigerant and store the molecular potential energy in the high-low pressure liquid storage system while refrigerating, and can utilize low-load working condition circulation to refrigerate at night or when the low-illumination photovoltaic power generation is insufficient, so that the problem of electric power storage of the photovoltaic power generation is effectively solved.
The utility model discloses a utilize the photoelectric drive compressor, turn into the chemical molecule potential energy of refrigerant to solar energy, utilize photovoltaic power generation compression refrigerant stock solution daytime, utilize refrigerant low pressure circulation refrigeration night, the compressor is out of work, energy-efficient.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
Embodiments of the present invention will now be described with reference to the accompanying drawings, and those skilled in the art will understand that the following embodiments are merely illustrative of the present invention and should not be considered as limiting the scope of the present invention. The specific techniques, connections, conditions, or the like, which are not specified in the examples, are performed according to the techniques, connections, conditions, or the like described in the literature in the art or according to the product specification. The materials, instruments or equipment are not indicated by manufacturers, and all the materials, instruments or equipment are conventional products which can be obtained by purchasing.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "provided" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention is understood according to the specific situation.
As shown in fig. 1, the utility model provides a pair of photovoltaic power generation driven dual cycle refrigerating system, including solar photovoltaic power station 1, compressor unit 2, condensing tower 3, high pressure liquid storage pot 4, low pressure liquid storage pot 6, refrigerant liquid feed pump 7, throttle expansion valve 8, evaporator heat transfer device 9, refrigerant return line A10, low pressure air pump 12, low pressure gas holder 13, refrigerant return line B14 and solenoid valve;
the solar photovoltaic power station 1 is arranged on the roof of a house of a refrigeration house, the installed capacity of the solar photovoltaic power station 1 is 1.8MW, the daily generated energy is 5000KWh, and the solar photovoltaic power station 1 is connected with the compressor unit 2 through a power line;
the compressor unit 2, the condensing tower 3, the high-pressure liquid storage tank 4, the low-pressure liquid storage tank 6, the refrigerant liquid supply pump 7 and the evaporator heat exchange device 9 are sequentially connected through pipelines; the throttle expansion valve 8 is arranged between the refrigerant liquid supply pump 7 and the evaporator heat exchange device 9;
the refrigerant return pipeline A10 is divided into two pipelines after being connected with the evaporator heat exchange device 9, wherein one pipeline is connected with the heat exchange pipeline in the cooling water of the condensing tower 3 and then enters the low-pressure liquid storage tank 6 through the pipeline; the other pipeline is directly connected with the low-pressure liquid storage tank 6 (the two pipelines are in parallel connection and are controlled by an electromagnetic valve, and the refrigerant can flow back to the low-pressure liquid storage tank from the evaporator heat exchange device through the two pipelines); the low-pressure low-temperature refrigerant liquid absorbs heat and is gasified in the evaporator heat exchange device 9, so that the temperature of air blown by a fan is reduced, and the temperature of the refrigeration house is reduced; the gasified refrigerant flows into a refrigerant return pipeline A10;
the low-pressure air pump 12 is connected with the low-pressure air storage tank 13, and the low-pressure air pump 12 is communicated with the top of the low-pressure liquid storage tank 6; the low-pressure air storage tank 13 is connected with the compressor unit 2 through the refrigerant return pipe B14.
The low-pressure circulating system is a forced refrigerant liquid supply refrigerating system, and the refrigerant is driven by a refrigerant liquid supply pump 7 to continuously circulate and flow in the low-pressure liquid storage tank 6 and the evaporator heat exchange device 9. After the refrigerant passes through the evaporator heat exchange device 9, part of the refrigerant is gasified into gas due to heat absorption, and at the moment, the refrigerant return pipeline A10 is mainly a gas-liquid mixture of the refrigerant, the temperature is far lower than the ambient temperature, and the refrigerant can further absorb heat and be gasified; at this moment, when the system is in high refrigeration load or the ambient temperature is higher, the cooling heat dissipation pressure of the condensing tower 3 is higher, the second electromagnetic valve 11 is opened, the refrigerant gas-liquid mixture in the refrigerant backflow pipeline a10 is enabled to pass through the heat exchange pipeline in the cooling water of the condensing tower 3, the heat dissipated by the compressed high-temperature refrigerant in the condensing tower is absorbed, the heat dissipation effect of the condensing tower is improved, and the heat dissipation pressure is reduced. Meanwhile, the refrigerant in the refrigerant return pipeline A10 is reheated and gasified, the gaseous refrigerant is rapidly collected by the low-pressure air pump 12, passes through the low-pressure air storage tank 13 and is then sent to the compressor unit for compression, and the liquid refrigerant is driven by the refrigerant liquid supply pump 7 to enter the refrigeration cycle again. According to the second law of thermodynamics, through the process, the heat which is originally dissipated to the environment in the condensing tower 3 is absorbed by the refrigerant in the refrigerant return pipeline A10, the generation of system entropy is reduced, the operation thermal efficiency of the system can be improved, and the electric energy consumption can be reduced while the high refrigeration load is maintained, so that the whole system can work under the high-load working condition.
When the refrigeration load is low or the environmental temperature is low, when the liquid level height and the pressure in the high-pressure liquid storage tank 4 and the low-pressure liquid storage tank 6 reach set values, the compressor can be stopped, the second electromagnetic valve 11 is closed, the fourth electromagnetic valve 16 is opened, the refrigerant gas-liquid mixture in the refrigerant return pipeline A10 does not flow through a heat exchange pipeline in cooling water of the condensing tower 3 and directly flows back to the low-pressure liquid storage tank 6 from the evaporator heat exchange device 9, liquid refrigerant is driven by the refrigerant liquid supply pump 7 to participate in the refrigeration cycle again, gaseous refrigerant is collected by the low-pressure air pump 12 and stored in the low-pressure air storage tank 13, and the compressor set is compressed when started; therefore, the whole system enters a low-load working condition to work.
Specifically, the electromagnetic valve includes: a first solenoid valve 5, a second solenoid valve 11, a third solenoid valve 15 and a fourth solenoid valve 16; wherein the content of the first and second substances,
the first electromagnetic valve 5 is arranged on a pipeline between the high-pressure liquid storage tank 4 and the low-pressure liquid storage tank 6, and the first electromagnetic valve 5 is a pressure reducing electromagnetic valve; the second solenoid valve 11 is arranged on a pipeline connecting the refrigerant return pipeline a10 and the heat exchange pipeline of the condensing tower 3, the third solenoid valve 15 is arranged on the refrigerant return pipeline B14, and the fourth solenoid valve 16 is arranged on a pipeline connecting the refrigerant return pipeline a10 and the low-pressure liquid storage tank 6.
Specifically, the system further comprises a controller, and the controller is respectively connected with the compressor unit 2, the condensing tower 3, the refrigerant liquid supply pump 7, the throttle expansion valve 8, the evaporator heat exchange device 9, the low-pressure air pump 12 and the electromagnetic valve.
In a further optimized scheme, pressure liquid level sensors are arranged in the high-pressure liquid storage tank 4 and the low-pressure liquid storage tank 6 and are connected with a controller; because the low-pressure refrigerant is easy to absorb heat and gasify, the low-pressure liquid storage tank 6 is coated with a heat insulation layer.
According to the further optimization scheme, the compressor unit 2 is a parallel compressor unit and consists of 4 125KW compressors, the comprehensive power of the compressor unit 2 reaches 500KW, and R22 or R40 is used as a refrigerant; the condensing tower 3 is an evaporative condensing tower and is used for cooling high-temperature and high-pressure refrigerant steam to liquefy the refrigerant steam into normal-temperature and high-pressure liquid; the high-pressure liquid storage tank 4 is a three-stage parallel high-pressure liquid storage tank and is used for storing condensed liquid refrigerant, the liquid pressure of the refrigerant is 1.4MPa, and the volume is V h The temperature is 38 ℃; the low-pressure liquid storage tank 6 is a four-stage parallel low-pressure liquid storage tank and is used for storing the low-pressure refrigerant liquid decompressed by the high-pressure liquid storage tank, the liquid pressure is 0.38MPa, and the volume is V L At a temperature of-8 ℃ (V) L ＞V h )。
The utility model decouples the operation of the compressor and the refrigeration cycle of the refrigeration house, the compressor can utilize the energy supply of the photovoltaic power station in the daytime, compresses the refrigerant, and stops when the liquid storage system (the pressure and the liquid level height reach the maximum set value) is saturated; when large-load refrigeration is needed, the refrigeration system is started to operate, small-load refrigeration and night refrigeration can be supplied to the evaporator by the liquid storage system to operate independently, so that the refrigeration of the refrigeration house can adjust the operation of the compressor according to the load, and the efficiency is improved; the compressor unit does not directly suck the refrigerant from the evaporator heat exchange device, so that liquid flushing caused by insufficient gasification of the refrigerant can be prevented, and the effect of protecting equipment is achieved.
When photovoltaic power generation was sufficient daytime, refrigerant steam temperature that the compressor unit came out was very high, can reach about 70 ℃, and the refrigerant temperature from the evaporimeter heat transfer device backward flow is still very low, at this moment, let in the coolant water of condensing tower with the refrigerant back flow, can improve cooling efficiency (in the middle of the cooling water of parallelly connected a heat exchange tube to condensing tower on the back flow of refrigerant, when temperature is high or the heat dissipation requirement is high, can utilize the low temperature refrigerant of backward flow to cool down for it).
The following explains the operation condition of the utility model:
1. high refrigeration load in daytime
In the system shutdown state, all the electromagnetic valves are in a closed state; when the system is started, the solar photovoltaic power station 1 normally generates power and supplies power, the third electromagnetic valve 15 is opened, the compressor unit 2 operates, and the compressed refrigerant flows through the condensing tower 3 to be condensed; when the numerical value of a pressure liquid level sensor in the high-pressure liquid storage tank 4 reaches a set value, the first electromagnetic valve 5 is opened, after the numerical value of the pressure liquid level sensor in the low-pressure liquid storage tank 6 reaches the set value, the throttle expansion valve 8 is opened, the refrigerant liquid supply pump 7 and the evaporator heat exchange device 9 operate, the fourth electromagnetic valve 16 is opened, the low-pressure air pump 12 operates, and at the moment, a closed loop is formed among the high-pressure liquid storage tank 4, the low-pressure liquid storage tank 6, the compressor unit 2 and the condensing tower 3, so that the refrigeration cycle driven by the compressor is realized; in this case, if the temperature of the condensing tower 3 reaches the set value, the controller opens the second electromagnetic valve 11 to allow the reflux refrigerant to cool the cooling water of the condensing tower 3, thereby improving the condensing efficiency; the liquid level of the low-pressure liquid storage tank 6 is controlled at 2/3 of the volume of the tank body, so that gas-liquid separation is realized; and when the compressor unit 2 works, the gas at the upper layer in the low-pressure liquid storage tank 6 is extracted through the refrigerant return pipeline B14, so that the damage of liquid to the compressor unit can be prevented.
Under the high refrigeration load daytime, evaporator heat transfer device 9 continuously operates, let liquid and pressure in high-pressure liquid storage pot 4 and the low pressure liquid storage pot 6 keep below pressure level sensor's setting value all the time, compressor unit 2 can not shut down this moment, temperature among the evaporator heat transfer device reaches the setting value upper limit (freezer refrigeration load is high, evaporator heat transfer device is heated by freezer environment all the time, the temperature reaches the upper limit, the second solenoid valve will be opened, refrigerant in the back flow will be for the cooling of condensing tower through the heat transfer device in the condensing tower).
2. Low and medium refrigeration load working condition in daytime
The refrigeration cycle is the same as the high refrigeration load working condition, and is different in that the temperature in the evaporator heat exchange device can reach the lower limit of a set value (the refrigeration load of the refrigeration house is low, the evaporator heat exchange device cannot be heated by the environment of the refrigeration house all the time, and the temperature can reach the lower limit), the evaporator heat exchange device 9 stops working, the refrigerant liquid supply pump 7 stops running, and the throttle expansion valve 8 is closed; when the numerical values of the pressure liquid level sensors in the high-pressure liquid storage tank 4 and the low-pressure liquid storage tank 6 reach set values, the third electromagnetic valve 15 is closed, the compressor unit 2 is stopped, the fourth electromagnetic valve 16 is closed, the first electromagnetic valve 5 is closed, and the condensing tower 3 is stopped; when the temperature in the evaporator heat exchange device reaches the upper limit of a set value (the refrigeration house needs refrigeration, and the environment of the refrigeration house is heated to raise the temperature), the evaporator heat exchange device 9 is started, the throttle expansion valve 8 and the fourth electromagnetic valve 16 are opened, the refrigerant liquid supply pump 7 starts to operate, and the low-pressure air pump 12 starts to operate; when the numerical value of a pressure liquid level sensor in the low-pressure liquid storage tank 6 reaches a set value, the first electromagnetic valve 5 is opened; when the numerical value of the pressure liquid level sensor in the high-pressure liquid storage tank 4 reaches a set value, the low-pressure air pump 12 is stopped, the third electromagnetic valve 15 is opened, the compressor unit 2 operates, and the condensing tower 3 operates; the electric energy consumption mainly takes place at compressor unit 2 operation in-process, and the start-stop of compressor unit 2 can be adjusted to the large capacity stock solution, realizes reasonable efficient refrigeration, reduces energy consumption and equipment loss.
3. Low refrigeration load condition at night
The third electromagnetic valve 15 is closed, the compressor unit 2 and the condensing tower 3 are shut down, the first electromagnetic valve 5 is closed, the fourth electromagnetic valve 16 is opened, the throttle expansion valve 8 is opened, the evaporator heat exchange device 9 operates, the refrigerant liquid supply pump 7 operates, the low-pressure air pump 12 operates, the refrigerant is conveyed to the evaporator heat exchange device 9 from the low-pressure liquid storage tank 6 through the refrigerant liquid supply pump 7 and then flows back to the low-pressure liquid storage tank 6, the refrigerant gas flowing back from the evaporator heat exchange device 9 can be stored in the low-pressure gas storage tank 13 through the operation of the low-pressure air pump 12, so that the numerical value of a pressure liquid level sensor in the low-pressure liquid storage tank 6 does not exceed a set value, the pressure balance of the system is maintained, and an expansion space is formed after the refrigerant absorbs heat and is gasified; when the liquid level of the pressure liquid level sensor in the low-pressure liquid storage tank 6 reaches a set value, the first electromagnetic valve 5 is opened, and the high-pressure liquid is cooled and decompressed to supplement the liquid for the low-pressure liquid storage tank 6 so as to maintain the refrigeration cycle. Because the refrigerating load at night is low, when the temperature in the evaporator heat exchange device reaches the lower limit of a set value (the ambient temperature of the refrigeration house is low, refrigeration is not needed), the whole system can stop working, the refrigeration of the evaporator heat exchange device at night is maintained by low-pressure circulation work, and energy is not needed from a photovoltaic power station, so that the electric energy consumption is minimum; the gas stored in the night low-pressure circulation mode absorbs the compression processing to perform high-pressure circulation when the compressor unit 2 is started up in the next day.
The utility model discloses a utilize the photoelectric drive compressor, turn into the chemical molecule potential energy of refrigerant to solar energy, utilize photovoltaic power generation compression refrigerant stock solution daytime, utilize refrigerant low pressure circulation refrigeration night, the compressor is out of work, energy-efficient.
The utility model discloses utilize the power supply of photovoltaic power plant, drive the work of the compressor unit that connects in parallel, compression R 22 Condensing the gas into a liquid R 22 (ii) a Then the liquid state R is put into 22 Reducing pressure and storing at low temperature to efficiently convert solar energy into R 22 Molecular potential of (c). When the photovoltaic power station can not supply power at night, the stored R is utilized 22 The refrigeration work of the refrigeration house is completed through low-pressure circulation, the problem of photoelectric energy storage is effectively solved, and the energy-saving and environment-friendly refrigeration house is energy-saving.
The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.
Claims (10)
1. The utility model provides a dual cycle refrigerating system of photovoltaic power generation driven which characterized in that: the system comprises a solar photovoltaic power station (1), a compressor unit (2), a condensing tower (3), a high-pressure liquid storage tank (4), a low-pressure liquid storage tank (6), a refrigerant liquid supply pump (7), a throttle expansion valve (8), an evaporator heat exchange device (9), a refrigerant return pipeline A (10), a low-pressure air pump (12), a low-pressure air storage tank (13), a refrigerant return pipeline B (14) and an electromagnetic valve; wherein the content of the first and second substances,
the solar photovoltaic power station (1) is connected with the compressor unit (2) through a power line;
the compressor unit (2), the condensing tower (3), the high-pressure liquid storage tank (4), the low-pressure liquid storage tank (6), the refrigerant liquid supply pump (7) and the evaporator heat exchange device (9) are sequentially connected through pipelines; the throttle expansion valve (8) is arranged between the refrigerant liquid supply pump (7) and the evaporator heat exchange device (9);
the refrigerant return pipeline A (10) is connected with the evaporator heat exchange device (9) and then divided into two pipelines, wherein one pipeline is connected with a heat exchange pipeline in cooling water of the condensing tower (3), and then enters the low-pressure liquid storage tank (6) through the pipeline; the other pipeline is directly connected with the low-pressure liquid storage tank (6);
the low-pressure air pump (12) is connected with the low-pressure air storage tank (13), and the low-pressure air pump (12) is communicated with the top of the low-pressure liquid storage tank (6); the low-pressure air storage tank (13) is connected with the compressor unit (2) through the refrigerant return pipeline B (14).
2. A photovoltaic power generation driven dual cycle refrigeration system as recited in claim 1 wherein said solenoid valve comprises: a first solenoid valve (5), a second solenoid valve (11), a third solenoid valve (15) and a fourth solenoid valve (16); wherein the content of the first and second substances,
the high-pressure liquid storage tank is characterized in that the first electromagnetic valve (5) is arranged on a pipeline between the high-pressure liquid storage tank (4) and the low-pressure liquid storage tank (6), the second electromagnetic valve (11) is arranged on a pipeline connected with a heat exchange pipeline of the refrigerant return pipeline A (10) and the condensing tower (3), the third electromagnetic valve (15) is arranged on a refrigerant return pipeline B (14), and the fourth electromagnetic valve (16) is arranged on a pipeline connected with the refrigerant return pipeline A (10) and the low-pressure liquid storage tank (6).
3. A photovoltaic power generation driven dual cycle refrigeration system as claimed in claim 1, wherein: the system further comprises a controller, wherein the controller is respectively connected with the compressor unit (2), the condensing tower (3), the refrigerant liquid supply pump (7), the throttle expansion valve (8), the evaporator heat exchange device (9), the low-pressure air pump (12) and the electromagnetic valve.
4. A photovoltaic power generation driven dual cycle refrigeration system as claimed in claim 3, wherein: pressure liquid level sensors are arranged in the high-pressure liquid storage tank (4) and the low-pressure liquid storage tank (6) and are connected with the controller.
5. A photovoltaic power generation driven dual cycle refrigeration system as claimed in claim 1, wherein: the compressor unit (2) is a parallel compressor unit and consists of a plurality of compressors.
6. A photovoltaic power generation driven dual cycle refrigeration system as claimed in claim 1, wherein: the condensing tower (3) is an evaporative condensing tower.
7. A photovoltaic power generation driven dual cycle refrigeration system as claimed in claim 1, wherein: the high-pressure liquid storage tank (4) is a three-stage parallel high-pressure liquid storage tank.
8. The photovoltaic power generation driven dual cycle refrigeration system of claim 1, wherein: the low-pressure liquid storage tank (6) is a four-stage parallel low-pressure liquid storage tank.
9. A photovoltaic power generation driven dual cycle refrigeration system as claimed in claim 1 or 8, wherein: the low-pressure liquid storage tank (6) is coated with a heat-insulating layer.
10. A photovoltaic power generation driven dual cycle refrigeration system according to claim 2, characterized in that the first solenoid valve (5) is a pressure reducing solenoid valve.
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| CN202220758001.2U CN217082999U (en) | 2022-04-01 | 2022-04-01 | Photovoltaic power generation driven dual cycle refrigerating system |
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| CN202220758001.2U CN217082999U (en) | 2022-04-01 | 2022-04-01 | Photovoltaic power generation driven dual cycle refrigerating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115986603A (en) * | 2023-03-22 | 2023-04-18 | 浙江省通信产业服务有限公司 | Photovoltaic power supply cabinet and pipeline control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115986603A (en) * | 2023-03-22 | 2023-04-18 | 浙江省通信产业服务有限公司 | Photovoltaic power supply cabinet and pipeline control method thereof |
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