CN112952793B - Air conditioning system with combined power supply of photovoltaic power generation and power storage - Google Patents
Air conditioning system with combined power supply of photovoltaic power generation and power storage Download PDFInfo
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- CN112952793B CN112952793B CN202110314241.3A CN202110314241A CN112952793B CN 112952793 B CN112952793 B CN 112952793B CN 202110314241 A CN202110314241 A CN 202110314241A CN 112952793 B CN112952793 B CN 112952793B
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- air conditioning
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- solar
- storage
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- 238000010248 power generation Methods 0.000 title claims abstract description 52
- 238000004378 air conditioning Methods 0.000 title claims abstract description 50
- 238000004146 energy storage Methods 0.000 claims abstract description 34
- 230000005855 radiation Effects 0.000 claims abstract description 17
- 239000003507 refrigerant Substances 0.000 claims description 11
- 239000007788 liquid Substances 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 239000000203 mixture Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 claims description 2
- 238000007667 floating Methods 0.000 claims description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000016253 exhaustion Diseases 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
- H02S40/30—Electrical components
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Photovoltaic Devices (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses an air conditioning system with combined power supply of photovoltaic power generation and power storage, which comprises an air conditioning unit and a power supply unit, wherein the power supply unit is a solar power generation unit, the solar power generation unit is connected with an input interface of a change-over switch, the change-over switch is provided with a plurality of output interfaces, a first output interface is connected with the air conditioning unit, a second output interface is connected with an input end of the power storage and energy storage unit, and an output end of the power storage and energy storage unit is connected with the air conditioning unit so as to supply power to the air conditioning unit by combining the solar power generation unit and the power storage and energy storage unit or alternatively supply power to the air conditioning unit; the air conditioning unit is a direct-current air conditioner or a direct-current air cooler. The air conditioning system can fully utilize solar radiation energy to refrigerate or heat, is convenient to install, and cannot cause energy fluctuation to a power supply public network.
Description
Technical Field
The invention belongs to the technical field of refrigeration, and particularly relates to an air conditioning system with combined power supply of photovoltaic power generation and power storage.
Background
Solar energy is called the most ideal new energy source and has the advantage of no exhaustion risk. The solar energy has the advantages of safety, reliability, no noise, no pollution emission, absolute cleanliness, no limitation of resource distribution regions and the like, and the solar energy system plays a role in practical life application, and has important significance in learning and mastering the practical application of the solar energy.
The solar photovoltaic utilization mainly comprises the steps of converting solar energy into electric energy through a photovoltaic effect by a solar panel and then utilizing high-grade electric energy. The photovoltaic application can be divided into two modes, one is off-grid photovoltaic application, namely, electric energy generated by the solar cell module is directly supplied to a load for use, the other is grid-connected photovoltaic application, and the electric energy generated by the solar cell module is directly converted into electric energy which is identical to the electric energy of the electric supply network through the controller and the inverter component and is supplied to the load together with the electric supply network for use.
When the off-grid photovoltaic is adopted and the solar radiation energy is sufficient, the solar radiation energy cannot be fully utilized; grid-connected photovoltaic is adopted, so that the random fluctuation of solar radiation energy is extremely easy to cause the fluctuation of power grid energy, and the requirement on a power supply public network is high; and when grid-connected photovoltaic is connected into a power supply public network, approval of a local power supply department is required, and the procedure is complicated.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the air conditioning system with combined power supply of photovoltaic power generation and power storage, which can fully utilize solar radiation energy, is convenient to install and can not cause energy fluctuation to a power supply public network.
The technical scheme of the invention is realized as follows:
the air conditioning system comprises an air conditioning unit and a power supply unit, wherein the power supply unit is a solar power generation unit, the solar power generation unit is connected with an input interface of a change-over switch, the change-over switch is provided with a plurality of output interfaces, a first output interface is connected with the air conditioning unit, a second output interface is connected with an input end of an electric storage energy storage unit, and an output end of the electric storage energy storage unit is connected with the air conditioning unit so as to supply power to the air conditioning unit jointly by the solar power generation unit and the electric storage energy storage unit or alternatively supply power to the air conditioning unit jointly by the solar power generation unit and the electric storage energy storage unit; the air conditioning unit is a direct-current air conditioner or a direct-current air cooler.
Further, the power supply further comprises an inverter power supply unit, a third output interface of the change-over switch is connected with an inlet end of the inverter power supply unit, and an output of the inverter power supply unit is connected with an alternating current load.
Further, the output end of the electric storage energy storage unit is connected with the inlet end of the inversion power supply unit so as to convert direct current stored by the electric storage energy storage unit into alternating current and then supply power to an alternating current load.
Further, the solar power generation unit comprises a solar panel, a charging junction box and a photovoltaic power generation data monitoring display, wherein the charging junction box is connected with the solar panel and used for collecting electric energy of the solar panel, and the photovoltaic power generation data monitoring display is connected with the charging junction box; the charging combiner box is connected with the input interface of the change-over switch.
Further, the system further comprises a lightning protection unit, wherein the lightning protection unit is connected with the charging combiner box and used for guaranteeing the safety of the system.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the operation mode of the system can be adjusted according to the solar radiation intensity, and when the solar radiation intensity reaches a certain condition, the solar power generation unit generates electric energy by utilizing solar power, and the electric energy is directly provided for the air conditioning unit; when the solar radiation intensity is higher, the electric energy generated by the solar power generation unit is redundant electric energy under the condition of meeting the operation requirement of the air conditioning unit, and then the redundant electric energy is stored in the electric storage energy storage unit so as to be supplied to the air conditioning unit by switching the change-over switch under the condition that the solar radiation intensity is lower or no irradiation is carried out at all, so that the operation requirement of the air conditioning unit is met.
2. The invention is off-grid, is not connected with the power supply public network, does not acquire electric energy from the power supply public network, does not provide electric energy for the power supply public network, does not cause energy fluctuation to the power supply public network, does not need to apply for a power supply department, can be installed by a common household, and has stronger practicability.
Drawings
FIG. 1-schematic structural diagram of the present invention.
Wherein: 1-a solar power generation unit; 11-a solar panel; 12-charging junction box; a 2-change-over switch; 3-an electric storage energy storage unit; 4-an air conditioning unit; 5-a lightning protection unit; 6-an inverter power supply unit.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
Referring to fig. 1, an air conditioning system for combined power supply of photovoltaic power generation and power storage comprises an air conditioning unit 4 and a power supply unit, wherein the power supply unit is a solar power generation unit 1, the solar power generation unit 1 is connected with an input interface of a change-over switch 2, the change-over switch is provided with a plurality of output interfaces, a first output interface is connected with the air conditioning unit 4, a second output interface is connected with an input end of a power storage and energy storage unit 3, and an output end of the power storage and energy storage unit 3 is connected with the air conditioning unit 4 so as to supply power to the air conditioning unit 4 by combining the solar power generation unit 1 and the power storage and energy storage unit 3 or alternatively supply power to the air conditioning unit 4; the air conditioning unit is a direct-current air conditioner or a direct-current air cooler.
Thus, when the solar radiation intensity reaches a certain condition, the solar power generation unit generates electric energy by utilizing solar energy, and directly provides electric energy for the air conditioning unit; when the solar radiation intensity is higher, the electric energy generated by the solar power generation unit is redundant electric energy under the condition of meeting the operation requirement of the air conditioning unit, and then the redundant direct current electric energy is stored in the electric storage energy storage unit so as to be supplied to the air conditioning unit by switching the change-over switch under the condition of low solar radiation intensity or no irradiation at all, thereby meeting the operation requirement of the air conditioning unit. Namely, the system has three operation modes: the first is that the solar power generation units independently supply power, at the moment, the independent power supply buttons of the solar power generation units corresponding to the change-over switches are turned on, and the combined power supply buttons of the solar power generation units and the electric storage and energy storage units and the independent power supply buttons of the electric storage and energy storage units are turned off; the second is that the solar power generation unit and the electric storage energy storage unit are used for combined power supply, at the moment, the solar power generation unit and the electric storage energy storage unit corresponding to the change-over switch are used for being started through a combined power supply button, and the solar power generation unit and the electric storage energy storage unit are used for being closed through an independent power supply button; and thirdly, the power storage and energy storage units independently supply power, at the moment, the power storage and energy storage unit independent power supply button corresponding to the change-over switch is turned on, and the solar power generation unit, the power storage and energy storage unit combined power supply button and the solar power generation unit independent power supply button are turned off.
Meanwhile, the air conditioning system belongs to off-grid photovoltaic application, is not connected with the power supply public network, namely does not acquire electric energy from the power supply public network, does not provide electric energy for the power supply public network, does not cause energy fluctuation to the power supply public network like grid-connected photovoltaic application, does not need to apply to a power supply department, can be installed by a common household, and has stronger practicability.
The direct-current variable-frequency air conditioner comprises a direct-current variable-frequency compressor, an electromagnetic directional valve, a condenser, a refrigerant storage, an evaporator and an expansion valve, wherein the electromagnetic directional valve can realize the conversion between the refrigerating and the heating of the system. The refrigeration principle is as follows: the direct-current variable-frequency compressor compresses gaseous refrigerant into high-temperature and high-pressure gas, sends the gas to the condenser for cooling, and then turns into medium-temperature and high-pressure liquid refrigerant to enter the drying bottle for filtering and dehumidifying, the medium-temperature and liquid refrigerant is throttled and depressurized by the expansion valve to become a low-temperature and low-pressure gas-liquid mixture (more liquid), and the gas-liquid mixture is vaporized by absorbing heat in air through the evaporator to become gas, and then returns to the compressor for continuous compression and continuous circulation for refrigeration.
Working principle of air cooler: air is introduced into the air cooler by a direct current fan in the air cooler, and then is subjected to convection heat exchange with refrigerant in the air cooler through a heat exchange calandria to absorb cold energy, and then is blown back to achieve the effect of indoor cooling
The working efficiency of the variable frequency compressor in the direct-current variable frequency air conditioner is always matched with the maximum working efficiency of the solar power generation unit, so that stable high-quality electric power is provided for the operation of the air conditioner, and stable refrigeration and heating are realized.
In specific implementation, the power supply further comprises an inverter power supply unit 6, the third output interface of the change-over switch 2 is connected with the inlet end of the inverter power supply unit 6, and the output of the inverter power supply unit 6 is connected with an alternating current load.
In this way, the direct current generated by the solar power generation unit can be converted into alternating current through the inverter power supply unit, and the alternating current can be used for supplying power to other alternating current loads.
In specific implementation, the output end of the electric storage energy storage unit 3 is connected with the inlet end of the inverter power supply unit 6, so as to convert the direct current stored in the electric storage energy storage unit 6 into alternating current and then supply power to the alternating current load.
In specific implementation, the solar power generation unit 1 includes a solar panel 11, a charging junction box 12, and a photovoltaic power generation data monitoring display, where the charging junction box 12 is connected with the solar panel 11 and is used for collecting electric energy of the solar panel 11, and the photovoltaic power generation data monitoring display is connected with the charging junction box 12 and is used for displaying data such as voltage and current of the solar power generation unit; the charging combiner box 12 is connected with an input interface of the change-over switch 2.
The output voltage of the solar panel is required to meet the floating charge voltage of the storage energy storage unit, so that the storage energy storage unit can be charged, and the temperature coefficient of the voltage of the solar panel, the voltage drop of the anti-reverse charge diode of the solar panel and the influence of the output voltage when the solar radiation does not reach the peak value are also considered.
In the concrete implementation, the lightning protection device further comprises a lightning protection unit 5, wherein the lightning protection unit 5 is connected with the charging combiner box 12 and used for guaranteeing the safety of the system.
Finally, it should be noted that the above-mentioned examples of the present invention are only illustrative of the present invention and are not limiting of the embodiments of the present invention. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. Not all embodiments are exhaustive. Obvious changes and modifications which are extended by the technical proposal of the invention are still within the protection scope of the invention.
Claims (5)
1. The air conditioning system is characterized in that the power supply unit is a solar power generation unit, the solar power generation unit is connected with an input interface of a change-over switch, the change-over switch is provided with a plurality of output interfaces, a first output interface is connected with the air conditioning unit, a second output interface is connected with an input end of an electric storage energy storage unit, and an output end of the electric storage energy storage unit is connected with the air conditioning unit so as to supply power to the air conditioning unit by combining the solar power generation unit and the electric storage energy storage unit or alternatively supply power to the air conditioning unit; the air conditioning unit is a direct-current air conditioner or a direct-current air cooler;
the solar power generation unit comprises a solar panel;
the output voltage of the solar panel is required to meet the floating charge voltage of the storage energy storage unit, and the temperature coefficient of the voltage of the solar panel, the voltage drop of the anti-reverse charging diode of the solar panel and the influence of the output voltage when the solar radiation does not reach the peak value are also required to be considered;
the air conditioning unit belongs to off-grid photovoltaic application and is not connected with a power supply public network;
when the solar radiation intensity reaches a certain condition, the solar power generation unit generates electric energy by utilizing solar power, and directly provides electric energy for the air conditioning unit; when the solar radiation intensity is higher, the electric energy generated by the solar power generation unit is redundant electric energy under the condition that the operation requirement of the air conditioning unit is met, and then part of redundant direct current electric energy is stored in the electric storage energy storage unit so as to be supplied to the air conditioning unit by switching the change-over switch under the condition that the solar radiation intensity is lower or no irradiation is carried out at all;
the direct-current air conditioner comprises a direct-current variable-frequency compressor, an electromagnetic directional valve, a condenser, a refrigerant storage, an evaporator, an expansion valve and a system, wherein the electromagnetic directional valve can realize the conversion between the refrigeration and the heating of the system, and the refrigeration principle is as follows: the direct-current variable-frequency compressor compresses a gaseous refrigerant into a high-temperature high-pressure gaseous state, sends the gaseous refrigerant to the condenser for cooling, and then turns into a medium-temperature high-pressure liquid refrigerant to enter the drying bottle for filtering and dehumidifying, the medium-temperature liquid refrigerant is throttled and depressurized by the expansion valve to become a low-temperature low-pressure gas-liquid mixture, and the low-temperature low-pressure gas-liquid mixture is vaporized by absorbing heat in air by the evaporator to become a gaseous state, and then returns to the compressor for continuous compression and continuous circulation for refrigeration;
the working principle of the direct current air cooler is as follows: air is introduced into the air cooler by a direct current fan in the air cooler, and then is subjected to convection heat exchange with a refrigerant in the air cooler through a heat exchange calandria to absorb cold energy, and then is blown back to achieve the effect of indoor cooling;
the working efficiency of the direct-current variable-frequency compressor is always matched with the maximum working efficiency of the solar power generation unit.
2. The air conditioning system for combined power generation and storage of claim 1 further comprising an inverter unit, wherein the third output interface of the transfer switch is connected to the inlet of the inverter unit, and the output of the inverter unit is connected to an ac load.
3. The air conditioning system for combined power generation and storage of claim 2, wherein the output end of the storage energy storage unit is connected to the inlet end of the inverter power supply unit, so as to convert the direct current stored in the storage energy storage unit into alternating current and then supply power to the alternating current load.
4. The air conditioning system for combined power supply of photovoltaic power generation and storage according to claim 1, wherein the solar power generation unit further comprises a charging junction box and a photovoltaic power generation data monitoring display, the charging junction box is connected with the solar panel and used for collecting electric energy of the solar panel, and the photovoltaic power generation data monitoring display is connected with the charging junction box; the charging combiner box is connected with the input interface of the change-over switch.
5. The air conditioning system for combined power generation and storage of claim 4, further comprising a lightning protection unit, wherein the lightning protection unit is connected with the charging combiner box and is used for guaranteeing the safety of the system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314241.3A CN112952793B (en) | 2021-03-24 | 2021-03-24 | Air conditioning system with combined power supply of photovoltaic power generation and power storage |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110314241.3A CN112952793B (en) | 2021-03-24 | 2021-03-24 | Air conditioning system with combined power supply of photovoltaic power generation and power storage |
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| Publication Number | Publication Date |
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| CN112952793A CN112952793A (en) | 2021-06-11 |
| CN112952793B true CN112952793B (en) | 2023-07-14 |
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| CN202110314241.3A Active CN112952793B (en) | 2021-03-24 | 2021-03-24 | Air conditioning system with combined power supply of photovoltaic power generation and power storage |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005975A (en) * | 2010-11-09 | 2011-04-06 | 广东美的电器股份有限公司 | Solar air conditioner and solar air-conditioning system consisting of solar air conditioner |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2665593Y (en) * | 2003-11-05 | 2004-12-22 | 海尔集团公司 | Air-conditioning system powered by solar energy and alternating current |
| CN103023127B (en) * | 2012-12-28 | 2014-12-31 | 劲达技术(河源)有限公司 | Solar air conditioner and power supply method thereof |
| CN103633666A (en) * | 2013-12-13 | 2014-03-12 | 广东志高空调有限公司 | Hybrid electric air conditioner |
| CN205372860U (en) * | 2015-12-23 | 2016-07-06 | 广东美的制冷设备有限公司 | Air conditioning system |
| CN205489759U (en) * | 2016-02-03 | 2016-08-17 | 珠海格力电器股份有限公司 | Photovoltaic energy storage air conditioning device |
| CN105915160B (en) * | 2016-04-22 | 2018-03-27 | 华中科技大学 | A kind of vehicle powering system based on photovoltaic module group |
| CN205911994U (en) * | 2016-06-21 | 2017-01-25 | 天津百利机械装备集团有限公司中央研究院 | Novel energy feed system that island accommodation was used |
| CN205825309U (en) * | 2016-07-14 | 2016-12-21 | 东莞市科旺科技股份有限公司 | Photovoltaic generation refrigerated air-conditioning system |
| CN107276527A (en) * | 2017-06-05 | 2017-10-20 | 昆山市圣光新能源科技有限公司 | A kind of solar air conditioner system and its solar airconditioning system |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005975A (en) * | 2010-11-09 | 2011-04-06 | 广东美的电器股份有限公司 | Solar air conditioner and solar air-conditioning system consisting of solar air conditioner |
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