CN209857479U - Refrigeration house refrigerating system based on solar PV/T technology - Google Patents
Refrigeration house refrigerating system based on solar PV/T technology Download PDFInfo
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- CN209857479U CN209857479U CN201920014873.6U CN201920014873U CN209857479U CN 209857479 U CN209857479 U CN 209857479U CN 201920014873 U CN201920014873 U CN 201920014873U CN 209857479 U CN209857479 U CN 209857479U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/10—Photovoltaic [PV]
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Abstract
The utility model discloses a refrigeration house refrigerating system based on solar PV/T technology, which comprises a solar PV/T system, a refrigerating circulation system and a defrosting system for defrosting the refrigerating circulation system; the solar PV/T system outputs electric energy to supply to the refrigeration cycle system; the refrigeration cycle system is provided with a plurality of defrosting pipelines, the solar PV/T system is provided with a heat collector, and the heat collector outputs a defrosting medium for transmitting heat energy to the defrosting pipelines through the defrosting system; the defrosting medium returns to the heat collector after flowing through the defrosting pipeline. The utility model discloses utilize the low temperature medium after the defrosting to reduce solar energy PV/T board temperature, improved the generating efficiency of solar energy PV/T board, utilize the heat that solar energy PV/T board produced to remove the defrosting, can sparingly use the consumption of the electric energy of power consumption defrosting mode, improve the utilization ratio of solar energy.
Description
Technical Field
The utility model relates to a freezer refrigerating system, in particular to freezer refrigerating system based on solar energy PV/T technique.
Background
At present, energy and environmental problems become main problems restricting the development of human society, and energy conservation and environmental protection are powerful guarantees for promoting economic development and harmonious interaction between human and nature. With the improvement of living standard and the pursuit of beautiful life of people, the demand of fresh food is more and more increased, and the rapid development of a cold chain system is promoted. The quantity and the energy consumption of the cold storage as the infrastructure of the cold chain system show the trend of rapid growth year by year, effectively reduce and solve the energy consumption of the cold storage system, and have important significance. On the other hand, solar energy is a renewable clean energy source, is widely distributed and has a large storage capacity, and how to effectively utilize the solar energy to provide sufficient energy for human beings becomes a hot problem of research in academic circles at present.
The cold storage adopts an artificial refrigeration mode to carry out cold processing and low-temperature storage on the perishable food. However, the evaporator in the cold storage is seriously frosted due to lower temperature and higher humidity in the cold storage, the storage quality is influenced, and the energy consumption of the cold storage is increased. When a common cold storage needs to be defrosted, extra energy is consumed to remove frost, and then heat added during defrosting is eliminated through a refrigerating device, so that double energy waste is caused.
In the aspect of solar energy utilization, the prior art mainly comprises a solar heat collection technology and a solar photovoltaic power generation technology, the solar heat collection technology generates heat simply through physical means, and the energy quality is low. The solar photovoltaic power generation technology utilizes solar energy to generate high-grade electric energy, the utilization rate of the solar energy is improved, however, solar radiation irradiates a photovoltaic panel, only a small part of energy is converted into electric energy, most of the rest of solar energy is converted into heat energy, the temperature of the photovoltaic panel is increased, the internal resistance of a photovoltaic cell is increased, the power generation efficiency is reduced, and how to effectively reduce the temperature of the photovoltaic panel becomes a key problem for improving the power generation efficiency of the photovoltaic panel.
Chinese utility model patent CN207180131U discloses a simple and easy removable solar energy cold storage, utilizes different forms electric quantity such as traditional photovoltaic board electricity generation, wind-complementary power supply of light to replace original single electric wire netting power supply mode, does not nevertheless consider the defrosting energy consumption of freezer and the generating efficiency problem of photovoltaic board. Chinese patent CN108507267A discloses a solar energy refrigerator defrosting system suitable for an indirect refrigeration system, which utilizes the heat generated by a solar heat collector to defrost the evaporator of the refrigerator, but the refrigeration unit must be closed during defrosting. Chinese patents CN108507256A and CN207922654U both disclose a solar cold store convenient to move, and mainly improve certain technologies from the perspective of convenient to move, and solar energy is used to replace the traditional power grid for power supply, and the comprehensive utilization of the photoelectric and photo-thermal of solar energy is not considered.
In conclusion, how to overcome the defects in the prior art, fully improve the power generation rate of solar energy, and reduce the defrosting energy consumption and the comprehensive energy consumption of the refrigeration house becomes a problem to be solved urgently.
Disclosure of Invention
The utility model provides a refrigeratory refrigeration system based on solar PV/T technology, which can fully improve the solar energy utilization rate for solving the technical problems existing in the prior art.
The utility model discloses a solve the technical scheme that technical problem that exists among the well-known technique took and be: a refrigeration house refrigeration system based on solar PV/T technology comprises a solar PV/T system, a refrigeration circulation system and a defrosting system for defrosting of the refrigeration circulation system; the solar PV/T system outputs electric energy to supply to the refrigeration cycle system; the refrigeration cycle system is provided with a plurality of defrosting pipelines, the solar PV/T system is provided with a heat collector, and the heat collector outputs a defrosting medium for transmitting heat energy to the defrosting pipelines through the defrosting system; the defrosting medium returns to the heat collector after flowing through the defrosting pipeline.
Further, the solar PV/T system comprises a solar panel, a storage battery and an inverter which are electrically connected in sequence; the inverter outputs electric energy to supply to the refrigeration cycle system; the heat collector is a plate type heat collector, and a heat collecting pipeline is arranged on the back of the solar cell panel.
Further, the defrosting system comprises a heat storage tank, a defrosting circulating pump, a defrosting liquid supply main line and a defrosting liquid return main line; a liquid outlet of the heat storage box is communicated with an input port of the defrosting circulating pump; the output port of the defrosting circulating pump is communicated with the input port of the heat collector; the output port of the heat collector is communicated with the defrosting liquid supply main path; the defrosting liquid return main circuit is communicated with a first heat storage liquid inlet of the heat storage box; the input port of the defrosting pipeline is communicated with the defrosting liquid supply main pipeline; and the output port of the defrosting pipeline is communicated with the defrosting liquid return main circuit.
Further, the defrosting system also comprises a first three-way valve; an inlet A of the first three-way valve is communicated with an output port of the heat collector; an outlet B of the first three-way valve is communicated with the defrosting liquid supply main line; and an outlet C of the first three-way valve is communicated with a second heat storage liquid inlet of the heat storage tank.
Further, the defrosting system further comprises a second three-way valve; an inlet A of the second three-way valve is communicated with an output port of the defrosting circulating pump; an outlet B of the second three-way valve is communicated with the inlet of the heat collector; and an outlet C of the second three-way valve is communicated with the defrosting liquid supply main line.
Furthermore, the refrigeration cycle system comprises a compressor, a condenser, an evaporator, a cooling liquid supply main line, a cooling liquid return main line and a plurality of air coolers; each air cooler is provided with a cooling pipeline, and an input port of each cooling pipeline is communicated with the cooling liquid supply main line; the output port of each cooling pipeline is communicated with the cooling liquid return main circuit; the evaporator comprises a cooling medium channel and a cooled medium channel; the cooling medium channel of the evaporator, the compressor and the condenser are communicated in sequence to form a circulation loop of a cooling medium; and the cooled medium is output from an output port of the cooled medium channel, sequentially flows through the cooling liquid supply main line, the cooling pipeline and the cooling liquid return main line, and is input to an input port of the cooled medium channel.
Furthermore, the refrigeration cycle system also comprises a cold storage box, a first cooling circulating pump and a second cooling circulating pump, wherein the cold storage box is provided with a first cold storage liquid inlet, a second cold storage liquid inlet, a first cold storage liquid outlet and a second cold storage liquid outlet; the first cold accumulation liquid outlet is communicated with the inlet of the cooled medium channel of the evaporator through the first cooling circulating pump; the first cold accumulation liquid inlet is communicated with an output port of a cooled medium channel of the evaporator; the second cold accumulation liquid outlet is communicated with the cooling liquid supply trunk through the second cooling circulating pump; the second cold accumulation liquid inlet is communicated with the cooling liquid return main line.
Furthermore, each air cooler is also provided with one defrosting pipeline, and the cooling pipeline and the defrosting pipeline of the same air cooler are the same pipeline; the cooled medium and the defrosting medium are the same; an input three-way valve is arranged at an input port of each cooling pipeline, an inlet A of the input three-way valve is communicated with the input port of the cooling pipeline, an outlet B of the input three-way valve is communicated with the cooling liquid supply main line, and an outlet C of the input three-way valve is communicated with the defrosting liquid supply main line; and an output three-way valve is arranged at an output port of each cooling pipeline, an inlet A of the output three-way valve is communicated with the output port of each cooling pipeline, an outlet B of the output three-way valve is communicated with the cooling liquid return main line, and an outlet C of the output three-way valve is communicated with the defrosting liquid return main line.
Furthermore, each air cooler is also provided with one defrosting pipeline, and the cooling pipeline and the defrosting pipeline of the same air cooler are the same pipeline; the cooled medium and the defrosting medium are the same; an input port of each cooling pipeline is provided with two branches; each branch is provided with an input stop valve, the output ports of the two input stop valves are communicated with the input port of the cooling pipeline, the input port of the input stop valve of one branch is communicated with the cooling liquid supply main line, and the input port of the input stop valve of the other branch is communicated with the defrosting liquid supply main line; the output port of each cooling pipeline is provided with two branches; each branch is provided with an output stop valve, the input ports of the two output stop valves are communicated with the output port of the cooling pipeline, the output port of the output stop valve of one branch is communicated with the cooling liquid return main circuit, and the output port of the output stop valve of the other branch is communicated with the defrosting liquid return main circuit.
The utility model has the advantages and positive effects that:
the utility model discloses can make full use of solar energy, reduce freezer energy consumption and waste, utilize the medium defrosting back temperature that melts to reduce, reduce the temperature of solar energy PV/T board, improve the generating efficiency of solar energy PV/T board, utilize the heat that solar energy PV/T board produced to remove the defrosting, can sparingly use the consumption of the electric energy of power consumption defrosting mode. The utility model discloses both utilized the heat energy that solar cell panel during operation produced to melt the frost, will convey solar cell panel through the cold energy that heat exchange produced when melting the frost again, reduce solar cell panel operating temperature, improved the generating efficiency of solar energy PV/T board, make full use of solar energy has like this improved the utilization ratio of solar energy.
The utility model discloses use the same cold-storage and heat accumulation circulation medium, cold-storage and heat accumulation circulation medium can use the same pipeline in the air-cooler, and the air-cooler among the refrigeration cycle system can switch over in turn between defrosting mode of operation and refrigeration mode of operation, and the volume of electric heating pipe in the air-cooler when reducing conventional electric heat defrosting has increased heat transfer area.
The utility model discloses utilize the produced electric energy of solar energy PV/T board to refrigerate daytime, the energy can be saved reduces or has avoided using electric wire netting peak electricity simultaneously, has reduced the power consumption cost, considers seasonal difference and the instability of solar energy simultaneously, and the system has adopted the cold-storage design, can fully improve the stability of system operation.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a compressor; 2. a condenser; 3. an electronic expansion valve; 4. an evaporator; 5. a first cooling circulation pump; 6. a cold storage tank; 7. a second cooling circulation pump; 8. an inverter; 9. a storage battery; 10. a solar panel; 11. a second three-way valve; 12. a defrosting circulation pump; 13. a first three-way valve; 14. a heat storage tank; 15. an air cooler; 16. an output three-way valve; 17. inputting a three-way valve; 18. a one-way valve; 101. defrosting to supply liquid to the main road; 102. defrosting and returning to the liquid main path; 141. a second heat accumulation liquid inlet; 142. a first heat accumulation liquid inlet; 143. a liquid outlet of the heat storage tank; 161. a first cold accumulation liquid inlet; 162. a second cold accumulation liquid inlet; 163. a first cold accumulation liquid outlet; 164. a second cold accumulation liquid outlet; 201. a cooling liquid supply main line; 202. cooling and returning the liquid to the main liquid path.
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are listed and will be described in detail with reference to the accompanying drawings:
referring to fig. 1, a refrigeration house refrigeration system based on solar PV/T technology includes a solar PV/T system, a refrigeration cycle system and a defrosting system for defrosting the refrigeration cycle system; the solar PV/T system outputs electric energy to supply to the refrigeration cycle system; the refrigeration cycle system is provided with a plurality of defrosting pipelines, the solar PV/T system is provided with a heat collector, and the heat collector outputs a defrosting medium for transmitting heat energy to the defrosting pipelines through the defrosting system; the defrosting medium returns to the heat collector after flowing through the defrosting pipeline.
The defrosting medium is a heating medium, and can be various liquid media or gas media capable of transferring heat energy (heat) such as water, oil and the like. The utility model discloses preferred liquid heat medium. The defrosting pipeline refers to a heat exchange pipeline which releases heat energy through the flowing of a medium for transmitting the heat energy to defrost.
The electric energy generated by the solar PV/T system is output and supplied to some electric equipment of the refrigeration cycle system, and can also be connected to a power grid, the heat energy generated when the solar PV/T system works is absorbed by the heat collector and is transmitted to a defrosting pipeline of the refrigeration cycle system through a defrosting medium for transmitting the heat energy through a pipeline of the defrosting system, the heat exchange is carried out in the defrosting pipeline to release the heat energy, the defrosting medium with higher temperature is changed into a defrosting medium with lower temperature, the cooled defrosting medium returns to the heat collector through the pipeline of the defrosting system, the heat energy is absorbed again in the defrosting pipeline, the solar PV/T system is cooled, and the solar PV/T system, the defrosting system and the defrosting pipeline of the refrigeration cycle system form a circulation loop for flowing the defrosting medium. The temperature of the solar PV/T plate is reduced by using the low-temperature defrosting medium after defrosting, the power generation efficiency of the solar PV/T plate is improved, the defrosting medium is heated by using the heat generated by the solar PV/T system, the defrosting medium with higher temperature is used for carrying out heat exchange in a defrosting pipeline to release heat energy, and the consumption of electric energy in an electricity-using defrosting mode can be saved.
Further, the solar PV/T system may include a solar panel 10, a storage battery 9, and an inverter 8 electrically connected in sequence; the inverter 8 outputs electric energy to supply to the refrigeration cycle system; the heat collector may be a plate type heat collector, and a heat collecting pipeline may be provided at the back of the solar cell panel 10. The storage battery 9 can be used for storing electric energy; the output voltage of the inverter 8 can be commercial power and can be grid-connected to a power grid, and the output voltage is more suitable for various conventional commercial power electric equipment. The plate type heat collector with the heat collecting pipeline arranged on the back of the solar cell panel 10 is simple in structure and high in heat energy absorption efficiency.
Further, the defrosting system may include a heat storage tank 14, a defrosting circulation pump 12, a defrosting liquid supply main line 101, and a defrosting liquid return main line 102; a liquid outlet 143 of the heat storage tank is communicated with an input port of the defrosting circulating pump 12; the output port of the defrosting circulating pump 12 is communicated with the input port of the heat collector; the output port of the heat collector is communicated with the defrosting liquid supply main line 101; the defrost return liquid main 102 may be in communication with a first heat storage inlet 142 of the heat storage tank 14; an input port of the defrosting pipeline is communicated with the defrosting liquid supply main line 101; the output port of the defrosting pipeline is communicated with the defrosting liquid return main line 102. Adopt heat accumulation case 14 can store heat energy, when the sunlight is not enough, when the heat energy that the heat collector produced is not enough to realize refrigeration cycle's defrosting, can use the heat energy that heat accumulation case 14 stored, continuously supply refrigeration cycle's defrosting pipeline.
Further, the defrosting system may further include a first three-way valve 13; the inlet A of the first three-way valve 13 can be communicated with the output port of the heat collector; an outlet B of the first three-way valve 13 may be communicated with the defrosting liquid supply main line 101; the outlet C of the first three-way valve 13 may be in communication with the second heat accumulation liquid inlet 141 of the heat accumulation tank 14.
Adopt first three-way valve 13, through the switching of the different passageways of valve, the defrosting medium can realize different circulation modes:
1. when sunlight is sufficient and the refrigeration cycle system needs defrosting, the inlet A of the first three-way valve 13 is communicated with the outlet B of the first three-way valve 13, and the heat collector can directly output defrosting medium with higher temperature to the defrosting liquid supply main line 101 and then to a defrosting pipeline of the refrigeration cycle system needing defrosting, so that defrosting of the refrigeration cycle system is realized.
2. When sunlight is sufficient and the refrigeration cycle system does not need defrosting, the inlet A of the first three-way valve 13 is communicated with the outlet C of the first three-way valve 13, and the heat collector can directly output a defrosting medium with higher temperature and send the defrosting medium to the heat storage box 14 for heat energy storage through the second heat storage liquid inlet 141 of the heat storage box 14.
First three-way valve 13 can select for use electronic or manual three-way valve, also can adopt other modes, for example sets up two branches with the delivery outlet of heat collector, and every branch road is equipped with electronic or manual stop valve etc..
Further, the defrosting system may further include a second three-way valve 11; an inlet A of the second three-way valve 11 can be communicated with an output port of the defrosting circulating pump 12; the outlet B of the second three-way valve 11 can be communicated with the inlet of the heat collector; an outlet C of the second three-way valve 11 may be in communication with the defrost liquid supply main 101. When the second three-way valve 11 is arranged, a one-way valve 18 is arranged between the outlet B of the first three-way valve 13 and the defrosting liquid supply main line 101, so that the defrosting medium flows in a one-way mode only to flow to the defrosting liquid supply main line 101 and cannot flow in a reverse direction.
Adopt second three-way valve 11, through the switching of the different passageways of valve, the medium of defrosting can realize different circulation modes:
1. when sunlight is sufficient, when the refrigeration cycle system needs defrosting, the inlet A of the second three-way valve 11 is communicated with the outlet B of the second three-way valve 11, the heat storage box 14 can directly output defrosting medium with lower temperature to the heat collector, absorption of heat energy generated when the solar PV/T system works is realized, cold energy is released, and the solar PV/T system is cooled.
2. When sunlight is insufficient and the refrigeration cycle system needs defrosting, the temperature of a defrosting medium in the heat storage box 14 is high, the inlet A of the second three-way valve 11 is communicated with the outlet C of the second three-way valve 11, and the heat storage box 14 can directly output the defrosting medium with high temperature to the defrosting liquid supply main line 101 and then to a defrosting pipeline of the refrigeration cycle system needing defrosting, so that defrosting of the refrigeration cycle system is realized.
The second three-way valve 11 can be an electric or manual three-way valve, and can also be in other modes, for example, two branches are arranged at the output port of the defrosting circulating pump 12, and each branch is provided with an electric or manual stop valve and the like.
The first three-way valve 13 and the second three-way valve 11 can be used in combination, and the defrosting system can realize different working modes:
1. when sunlight is sufficient, when the refrigeration cycle system needs defrosting, the inlet A of the first three-way valve 13 is communicated with the outlet B of the first three-way valve 13, the inlet A of the second three-way valve 11 is communicated with the outlet B of the second three-way valve 11, the heat collector outputs a defrosting medium with higher temperature through the first three-way valve 13 to the defrosting liquid supply main line 101 and then to a defrosting pipeline of the refrigeration cycle system needing defrosting, defrosting of the refrigeration cycle system is realized, the defrosting medium with lower temperature output from the defrosting pipeline is returned to the liquid main line 102 and then enters the heat storage box 14 through the first heat storage liquid inlet 142 of the heat storage box 14, and then the defrosting medium is output from the heat storage box 14 through the defrosting circulation pump 12 and then passes through the second three-way valve 11, so that the defrosting medium with lower temperature is input to the heat collector, absorption of heat energy generated during the work of the solar PV/T system is realized, and cold energy is released, and cooling the solar PV/T system.
2. When sunlight is sufficient and the refrigeration cycle system does not need defrosting, the inlet A of the first three-way valve 13 is communicated with the outlet C of the first three-way valve 13, the inlet A of the second three-way valve 11 is communicated with the outlet B of the second three-way valve 11, a defrosting medium with lower temperature is output from the heat storage box 14 through the defrosting circulating pump 12 and passes through the second three-way valve 11, so that the defrosting medium with lower temperature is input into the heat collector, the absorption of heat energy generated when the solar PV/T system works is realized, cold energy is released, and the temperature of the solar PV/T system is reduced; after the defrosting medium absorbs heat energy, the temperature rises and is output from the heat collector, and the defrosting medium enters the heat storage tank 14 from the second heat storage liquid inlet 141 of the heat storage tank 14 through the first three-way valve 13 to store the heat energy.
2. When sunlight is insufficient and the refrigeration cycle system needs defrosting, a one-way valve 18 is arranged between the outlet B of the first three-way valve 13 and the defrosting liquid supply main line 101, so that the defrosting medium flows in a one-way mode only to the defrosting liquid supply main line 101 and cannot flow in a reverse direction, and the conduction state of the first three-way valve 13 does not need to be considered. The inlet a of the second three-way valve 11 is communicated with the outlet C of the second three-way valve 11, the heat storage tank 14 stores heat, the temperature of the defrosting medium in the heat storage tank 14 is high, the defrosting medium with high temperature is output from the heat storage tank 14 through the defrosting circulation pump 12, passes through the second three-way valve 11, reaches the defrosting liquid supply main line 101, and then reaches the defrosting pipeline of the refrigeration cycle system needing defrosting, so that defrosting of the refrigeration cycle system is realized, the defrosting medium with low temperature output from the defrosting pipeline reaches the defrosting liquid return main line 102, and then enters the heat storage tank 14 through the first heat storage liquid inlet 142 of the heat storage tank 14.
The first heat storage liquid inlet 142 of the heat storage tank 14 and the second heat storage liquid inlet 141 of the heat storage tank 14 are preferably located at the top of the heat storage tank, and the liquid outlet 143 of the heat storage tank is preferably located at the bottom of the heat storage tank.
Further, the refrigeration cycle system may include a compressor 1, a condenser 2, an evaporator 4, a cooling liquid supply trunk 201, a cooling liquid return trunk 202, and a plurality of air coolers 15; each air cooler 15 can be provided with a cooling pipeline, and an input port of each cooling pipeline is communicated with the cooling liquid supply trunk 201; the output port of each cooling pipeline is communicated with the cooling liquid return main circuit 202; the evaporator 4 may include a cooling medium passage and a cooled medium passage; the cooling medium channel of the evaporator 4, the compressor 1 and the condenser 2 are communicated in sequence to form a circulation loop of a cooling medium; the cooling target medium can be output from the output port of the cooling target medium channel, sequentially flows through the cooling liquid supply main line 201, the cooling pipeline and the cooling liquid return main line 202, and then is input to the input port of the cooling target medium channel. According to the requirements of the area and the cold quantity of the refrigeration house, a refrigeration unit consisting of a group of compressors 1, condensers 2 and the like can be arranged, a plurality of air coolers 15 are arranged, the work of the air coolers 15 is controlled, and the temperature can be adjusted more conveniently; and moreover, the defrosting is convenient to be performed alternately, and the large temperature fluctuation of the storehouse is avoided.
A cooling medium channel of the evaporator 4 circulates and flows a cooling medium, and a cooled medium channel circulates and flows a cooled medium; the cooling medium and the medium to be cooled perform heat exchange in the evaporator.
The cooling medium and the cooled medium are both a refrigerant, and can be various liquid media or gas media capable of transmitting cold energy (cold energy) such as water, oil and the like. The utility model discloses preferred liquid refrigerant. The cooling line refers to a heat exchange line that performs cooling by releasing cold energy through the flow of a medium that transmits cold energy.
Further, the refrigeration cycle system may further include a cold storage tank 6, a first cooling circulation pump 5 and a second cooling circulation pump 7, wherein the cold storage tank 6 is provided with a first cold storage liquid inlet 161, a second cold storage liquid inlet 162, a first cold storage liquid outlet 163 and a second cold storage liquid outlet 164; the first cold-storage liquid outlet 163 can be communicated with the inlet of the cooled medium passage of the evaporator 4 via the first cooling circulation pump 5; the first cold-storage liquid inlet 161 may communicate with an outlet of the cooled medium passage of the evaporator 4; the second cold accumulation liquid outlet 164 can be communicated with the cooling liquid supply trunk 201 through the second cooling circulation pump 7; the second cold accumulation inlet port 162 may be in communication with the cooling return liquid main 202. The first and second cold accumulation liquid inlets 161 and 162 of the cold accumulation tank 6 are preferably located at the top of the heat accumulation tank, and the first and second cold accumulation liquid outlets 163 and 164 of the cold accumulation tank 6 are preferably located at the bottom of the heat accumulation tank.
The mode of adopting cold storage box 6, the produced electric energy of usable solar energy PV/T board refrigerates daytime, has reduced or avoided using the electric wire netting peak electricity, considers seasonal difference and the instability of solar energy simultaneously, and the system has adopted cold storage formula design, can fully improve the stability of system operation.
Furthermore, each air cooler 15 may further be provided with one defrosting pipeline, and the cooling pipeline and the defrosting pipeline of the same air cooler 15 may be the same pipeline; the cooled medium and the defrosting medium are the same; an input three-way valve 17 can be arranged at the input port of each cooling pipeline, an inlet A of the input three-way valve 17 can be communicated with the input port of the cooling pipeline, an outlet B of the input three-way valve 17 can be communicated with the cooling liquid main supply line 201, and an outlet C of the input three-way valve 17 can be communicated with the defrosting liquid main supply line 101; an output three-way valve 16 may be disposed at an output port of each cooling pipeline, an inlet a of the output three-way valve 16 may be communicated with the output port of the cooling pipeline, an outlet B of the output three-way valve 16 may be communicated with the cooling liquid return main 202, and an outlet C of the output three-way valve 16 may be communicated with the defrosting liquid return main 102.
When the air cooler 15 works in a refrigeration working mode, the inlet A of the input three-way valve 17 is communicated with the outlet B of the input three-way valve 17, the inlet A of the output three-way valve 16 is communicated with the outlet B of the output three-way valve 16, a heat exchange pipeline of the air cooler 15 is a cooling pipeline, and a cooling medium flows into the cooling pipeline to release cold energy and refrigerate.
When the air cooler 15 works in the defrosting mode, the inlet A of the input three-way valve 17 is communicated with the outlet C of the input three-way valve 17, the inlet A of the output three-way valve 16 is communicated with the outlet C of the output three-way valve 16, the heat exchange pipeline of the air cooler 15 is a defrosting pipeline, a defrosting medium flows into the defrosting pipeline, heat energy is released, and defrosting is performed.
The input three-way valve 17 and the output three-way valve 16 can be electric or manual three-way valves, and can also adopt other modes, for example, an input port of the cooling pipeline is provided with two branches, each branch is provided with an electric or manual stop valve, an output port of the cooling pipeline is provided with two branches, and each branch is provided with an electric or manual stop valve and the like.
For example, each air cooler 15 may further be provided with one defrosting pipeline, and the cooling pipeline and the defrosting pipeline of the same air cooler may be the same pipeline; the cooled medium and the defrosting medium are the same; the input port of each cooling pipeline can be provided with two branches; each branch can be provided with an input stop valve, the output ports of the two input stop valves are communicated with the input port of the cooling pipeline, the input port of the input stop valve of one branch is communicated with the cooling liquid supply main line, and the input port of the input stop valve of the other branch is communicated with the defrosting liquid supply main line; the output port of each cooling pipeline can be provided with two branches; each branch can be provided with an output stop valve, the input ports of the two output stop valves are communicated with the output port of the cooling pipeline, the output port of the output stop valve of one branch is communicated with the cooling liquid return main circuit, and the output port of the output stop valve of the other branch is communicated with the defrosting liquid return main circuit.
The same air cooler 15 can be alternately switched between the defrosting operation mode and the refrigerating operation mode as required, but cannot work in both the defrosting operation mode and the refrigerating operation mode at the same time.
At the same time, the working modes of different air coolers 15 can be different, some air coolers 15 can work in the defrosting working mode, and some air coolers 15 can work in the cooling working mode; some of the air coolers 15 may also be shut down and not operated.
The air coolers 15 can alternately work in a defrosting working mode or a refrigerating working mode; therefore, the temperature of the refrigeration house is not greatly fluctuated due to the simultaneous defrosting of the air cooler 15.
Like this, air-cooler 15 can alternate between defrosting mode and refrigeration mode and switch over, and cold-storage circulation medium is the by cooling medium that carries out the heat exchange in evaporimeter 4, and heat accumulation circulation medium is the defrosting medium that absorbs the heat energy at the heat collector of solar energy PV/T system, is the same by cooling medium and defrosting medium, and cold-storage and heat accumulation circulation medium can use the same pipeline like this in air-cooler 15, reduces the volume of electric heating pipe in air-cooler 15 during conventional electric heat defrosting, has increased heat transfer area. And the construction of the air-cooler 15 is simpler.
The utility model also provides a freezer refrigerating system's working method embodiment based on solar energy PV/T technique, this method is: the electric energy generated by the solar cell panel 10 is supplied to the refrigeration cycle system, the heat energy generated by the solar cell panel 10 during working is absorbed by the heat collector, and the heat energy is transmitted to a plurality of defrosting pipelines of the refrigeration cycle system through the defrosting medium for transmitting the heat energy, and the defrosting medium exchanges heat in the defrosting pipelines and then returns to the heat collector.
The electric energy generated by the solar PV/T system is output and supplied to some electric equipment of the refrigeration cycle system, the heat energy generated by the solar PV/T system during working is absorbed by the heat collector and is transmitted to a defrosting pipeline of the refrigeration cycle system through a defrosting medium for transmitting the heat energy through a pipeline of the defrosting system, heat exchange is carried out in the defrosting pipeline to release the heat energy, the defrosting medium with higher temperature is changed into the defrosting medium with lower temperature, the cooled defrosting medium returns to the heat collector through the pipeline of the defrosting system, the heat energy is absorbed again in the heat collector, and meanwhile, the temperature of the solar PV/T system is cooled. The temperature of the solar PV/T plate is reduced by using the low-temperature defrosting medium after defrosting, the power generation efficiency of the solar PV/T plate is improved, the defrosting medium is heated by using the heat generated by the solar PV/T system, the defrosting medium with higher temperature is used for carrying out heat exchange in a defrosting pipeline to release heat energy, and the consumption of electric energy in an electricity-using defrosting mode can be saved.
Furthermore, heat energy generated by the solar cell panel 10 during operation can be absorbed and then stored in the heat storage box 14, and the heat energy of the heat collector can be transmitted to a defrosting pipeline of the refrigeration cycle system through valve control when sunlight is sufficient and the refrigeration cycle system needs defrosting; when sunlight is sufficient and the refrigeration cycle system does not need defrosting, the heat energy of the heat collector can be transmitted to the heat storage box 14; when sunlight is insufficient and the refrigeration cycle needs defrosting, the heat energy of the heat storage box 14 can be conveyed to a defrosting pipeline of the refrigeration cycle. Adopt heat accumulation case 14 can store heat energy, when the sunlight is not enough, when the heat energy that the heat collector produced is not enough to realize refrigeration cycle's defrosting, can use the heat energy that heat accumulation case 14 stored, continuously supply refrigeration cycle's defrosting pipeline. The method improves the utilization rate of solar energy.
Several working flows of the invention are described below in connection with a preferred embodiment of the invention:
when the solar panel 10 works in the daytime and the air coolers 15 of the refrigeration house do not frost, a defrosting medium enters a heat collecting pipeline on the back side of the solar panel 10 from the heat storage box 14 through the second three-way valve 11 (at the moment, the port A and the port B are conducted) under the driving of the defrosting circulating pump 12 to absorb heat in the solar panel 10 and then returns to the heat storage box 14 through the first three-way valve 13 (at the moment, the port A and the port C are conducted), so that the heat in the solar panel 10 is collected in the heat storage box 14, at the moment, electric energy generated by the solar panel 10 passes through the storage battery 9 and then is supplied to the compressor 1 for operation through the inverter 8, a refrigeration system consisting of the compressor 1, the condenser 2, the electronic expansion valve 3 and the evaporator 4 generates cold energy, and the evaporator 4 comprises a cooling medium channel and a cooled medium channel; the cooling medium channel of the evaporator 4, the compressor 1 and the condenser 2 are communicated in sequence to form a circulation loop of a cooling medium; the cooling target medium is output from the output port of the cooling target medium channel, sequentially flows through the cooling liquid supply main line 201, the cooling pipeline and the cooling liquid return main line 202, and is input to the input port of the cooling target medium channel.
The cooled medium stored in the cold storage box 6 enters the cooled medium channel of the evaporator 4 under the action of the first cooling circulating pump 5, the cooled medium exchanges heat with the cooling medium in the cooling medium channel, the cooled medium exchanges heat and then is output to the cold storage box 6, and the carried cold energy is stored in the cold storage box 6; each air cooler 15 is provided with a cooling pipeline, and an input port of each cooling pipeline is communicated with the cooling liquid supply trunk 201; the output port of each cooling pipeline is communicated with the cooling liquid return main circuit 202;
when the refrigeration house needs to refrigerate, one or more air coolers 15 enter a refrigeration working mode, a cooling medium is conveyed into the cold storage box 6 through the second cooling circulating pump 7 and then enters the cooling liquid supply main line 201, the cooling medium enters the cooling pipeline of the air cooler 15 through the input three-way valve 17 of the input port of the air cooler 15 (at the moment, the port A and the port B are conducted), cold energy is released after the cooling pipeline carries out heat exchange, then the cooling liquid return main line 202 enters the cold storage box 6 through the output three-way valve 16 of the output port of the air cooler 15 (at the moment, the port A and the port B are conducted), and finally the cold storage box 6 is returned through the cooling liquid return main line 202, so that the refrigeration cycle of the air.
When the solar cell panel 10 works in the daytime, when one or more of the air coolers 15 needs to be defrosted, and the air coolers 15 needing to be defrosted are switched to the defrosting mode, defrosting media in the heat storage tank 14 sequentially pass through the defrosting circulation pump 12, the second three-way valve 11 (at this time, the port a and the port B are communicated), the heat collecting pipes of the solar cell panel 10, the first three-way valve 13 (at this time, the port a and the port B are communicated), the defrosting liquid supply main line 101, the input three-way valve 17 (at this time, the port a and the port C are communicated), the cooling pipes of the air coolers 15, the output three-way valve 16 (at this time, the port a and the port C are communicated), the defrosting liquid return main line 102, and finally return to the heat storage tank 14, so that defrosting operation of the air coolers.
When the solar cell panel 10 does not work at night and a certain air cooler 15 in the refrigeration house needs defrosting, defrosting media of the heat storage box 14 sequentially pass through the defrosting circulating pump 12, the second three-way valve 11 (at the moment, the port A and the port C are communicated), the defrosting liquid supply trunk 101, the input three-way valve 17 (at the moment, the port A and the port C are communicated), the cooling pipeline of the air cooler 15, the output three-way valve 16 (at the moment, the port A and the port C are communicated), the defrosting liquid return trunk 102 and finally return to the heat storage box 14 to finish defrosting operation of the air cooler 15, and other air coolers 15 can work in a cooling working mode,
when the cold accumulation amount of the cold accumulation box 6 can not meet the refrigeration requirement of the refrigeration house at night, the electric energy of the power grid can be used for supplying power to the refrigeration cycle system, the continuous refrigeration of the refrigeration system can be realized, and the temperature stability of the refrigeration house is ensured. Meanwhile, the electric energy which can be provided by the solar cell panel 10 in the daytime of the second day is predicted according to meteorological data, and under the severe working condition, when the solar cell panel 10 cannot provide enough electric quantity to meet the cold load of the cold storage, the off-peak electricity at night can be utilized in advance to cool the cold storage box 6 so as to meet the requirement of the cold storage of the second day.
The above-mentioned embodiments are only used for illustrating the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, the scope of the present invention should not be limited by the embodiment, that is, all equivalent changes or modifications made by the spirit of the present invention should still fall within the scope of the present invention.
Claims (9)
1. A refrigeration house refrigeration system based on solar PV/T technology is characterized by comprising a solar PV/T system, a refrigeration cycle system and a defrosting system for defrosting the refrigeration cycle system; the solar PV/T system outputs electric energy to supply to the refrigeration cycle system; the refrigeration cycle system is provided with a plurality of defrosting pipelines, the solar PV/T system is provided with a heat collector, and the heat collector outputs a defrosting medium for transmitting heat energy to the defrosting pipelines through the defrosting system; the defrosting medium returns to the heat collector after flowing through the defrosting pipeline.
2. The solar PV/T technology based cold storage refrigeration system according to claim 1, characterized in that the solar PV/T system comprises a solar panel, a storage battery and an inverter electrically connected in sequence; the inverter outputs electric energy to supply to the refrigeration cycle system; the heat collector is a plate type heat collector, and a heat collecting pipeline is arranged on the back of the solar cell panel.
3. The solar PV/T technology-based chiller refrigeration system of claim 1, wherein the defrost system comprises a thermal storage tank, a defrost circulation pump, a defrost supply trunk, and a defrost return trunk; a liquid outlet of the heat storage box is communicated with an input port of the defrosting circulating pump; the output port of the defrosting circulating pump is communicated with the input port of the heat collector; the output port of the heat collector is communicated with the defrosting liquid supply main path; the defrosting liquid return main circuit is communicated with a first heat storage liquid inlet of the heat storage box; the input port of the defrosting pipeline is communicated with the defrosting liquid supply main pipeline; and the output port of the defrosting pipeline is communicated with the defrosting liquid return main circuit.
4. The solar PV/T technology based freezer refrigeration system of claim 3, wherein the defrosting system further comprises a first three-way valve; an inlet A of the first three-way valve is communicated with an output port of the heat collector; an outlet B of the first three-way valve is communicated with the defrosting liquid supply main line; and an outlet C of the first three-way valve is communicated with a second heat storage liquid inlet of the heat storage tank.
5. The solar PV/T technology based freezer refrigeration system of claim 3, wherein the defrosting system further comprises a second three-way valve; an inlet A of the second three-way valve is communicated with an output port of the defrosting circulating pump; an outlet B of the second three-way valve is communicated with the inlet of the heat collector; and an outlet C of the second three-way valve is communicated with the defrosting liquid supply main line.
6. The refrigeration house refrigeration system based on the solar PV/T technology according to claim 3, wherein the refrigeration cycle system comprises a compressor, a condenser, an evaporator, a cooling liquid supply trunk, a cooling liquid return trunk and a plurality of air coolers; each air cooler is provided with a cooling pipeline, and an input port of each cooling pipeline is communicated with the cooling liquid supply main line; the output port of each cooling pipeline is communicated with the cooling liquid return main circuit; the evaporator comprises a cooling medium channel and a cooled medium channel; the cooling medium channel of the evaporator, the compressor and the condenser are communicated in sequence to form a circulation loop of a cooling medium; and the cooled medium is output from an output port of the cooled medium channel, sequentially flows through the cooling liquid supply main line, the cooling pipeline and the cooling liquid return main line, and is input to an input port of the cooled medium channel.
7. The solar PV/T technology based refrigeration house refrigeration system of claim 6, wherein the refrigeration cycle system further comprises a cold storage tank, a first cooling circulation pump and a second cooling circulation pump, the cold storage tank is provided with a first cold storage liquid inlet, a second cold storage liquid inlet, a first cold storage liquid outlet and a second cold storage liquid outlet; the first cold accumulation liquid outlet is communicated with the inlet of the cooled medium channel of the evaporator through the first cooling circulating pump; the first cold accumulation liquid inlet is communicated with an output port of a cooled medium channel of the evaporator; the second cold accumulation liquid outlet is communicated with the cooling liquid supply trunk through the second cooling circulating pump; the second cold accumulation liquid inlet is communicated with the cooling liquid return main line.
8. The solar PV/T technology-based freezer refrigeration system of claim 7, wherein each air cooler is further provided with one said defrosting conduit, and the cooling conduit and the defrosting conduit of the same air cooler are the same conduit; the cooled medium and the defrosting medium are the same; an input three-way valve is arranged at an input port of each cooling pipeline, an inlet A of the input three-way valve is communicated with the input port of the cooling pipeline, an outlet B of the input three-way valve is communicated with the cooling liquid supply main line, and an outlet C of the input three-way valve is communicated with the defrosting liquid supply main line; and an output three-way valve is arranged at an output port of each cooling pipeline, an inlet A of the output three-way valve is communicated with the output port of each cooling pipeline, an outlet B of the output three-way valve is communicated with the cooling liquid return main line, and an outlet C of the output three-way valve is communicated with the defrosting liquid return main line.
9. The solar PV/T technology-based freezer refrigeration system of claim 7, wherein each air cooler is further provided with one said defrosting conduit, and the cooling conduit and the defrosting conduit of the same air cooler are the same conduit; the cooled medium and the defrosting medium are the same; an input port of each cooling pipeline is provided with two branches; each branch is provided with an input stop valve, the output ports of the two input stop valves are communicated with the input port of the cooling pipeline, the input port of the input stop valve of one branch is communicated with the cooling liquid supply main line, and the input port of the input stop valve of the other branch is communicated with the defrosting liquid supply main line; the output port of each cooling pipeline is provided with two branches; each branch is provided with an output stop valve, the input ports of the two output stop valves are communicated with the output port of the cooling pipeline, the output port of the output stop valve of one branch is communicated with the cooling liquid return main circuit, and the output port of the output stop valve of the other branch is communicated with the defrosting liquid return main circuit.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708380A (en) * | 2019-01-05 | 2019-05-03 | 天津大学 | A kind of cold storage refrigerating system and working method based on solar energy PV/T technology |
| CN111140467A (en) * | 2020-01-14 | 2020-05-12 | 福建启盛实验设备科技有限公司 | Cold platform operating system of central authorities' section |
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2019
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109708380A (en) * | 2019-01-05 | 2019-05-03 | 天津大学 | A kind of cold storage refrigerating system and working method based on solar energy PV/T technology |
| CN109708380B (en) * | 2019-01-05 | 2023-10-31 | 天津大学 | Cold storage refrigeration system based on solar PV/T technology and working method |
| CN111140467A (en) * | 2020-01-14 | 2020-05-12 | 福建启盛实验设备科技有限公司 | Cold platform operating system of central authorities' section |
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