CN210014498U - Off-grid photovoltaic energy storage type air conditioning system - Google Patents
Off-grid photovoltaic energy storage type air conditioning system Download PDFInfo
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- CN210014498U CN210014498U CN201920022035.3U CN201920022035U CN210014498U CN 210014498 U CN210014498 U CN 210014498U CN 201920022035 U CN201920022035 U CN 201920022035U CN 210014498 U CN210014498 U CN 210014498U
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Abstract
The utility model discloses an off-grid photovoltaic energy storage formula air conditioning system, including control system, the photovoltaic system who links to each other with control system respectively, heat pump system and heat storage system, heat pump system mainly comprises a plurality of heat pumps, the heat storage system mainly comprises a plurality of heat storage device, the heat storage device adopts the heat accumulation material heat accumulation, photovoltaic system provides electric power for whole air conditioning system, photovoltaic system, heat pump system and heat storage system link to each other in proper order, take place the heat transfer between heat pump system and the heat storage system and store wherein by the heat storage system, so that provide air conditioning system terminal and use. The utility model discloses use photovoltaic system to supply power for whole air conditioning system for air conditioning system can work under the state from net or no electric power storage system, and energy consumption "nearly zero" of whole system realizes energy-concerving and environment-protective purpose, and whole air conditioning system adopts from the net mode, and no electric wire netting absorbs the burden, convenient to use, and is simple high-efficient. The heat storage system adopts heat storage materials for heat storage, and the heating energy efficiency ratio of the whole system is improved.
Description
Technical Field
The utility model relates to an air conditioning system, in particular to off-grid photovoltaic energy storage formula air conditioning system.
Background
An air conditioning system is a system that treats the temperature, humidity, cleanliness and airflow velocity of indoor air using a manual method. The air conditioning system can make certain places obtain air with certain temperature, humidity and air quality so as to meet the requirements of users and production processes and improve labor hygiene and indoor climate conditions.
The air conditioning system is divided into the following modes according to media:
⒈ full air mode, which is to use air conditioner to send cold air to make the temperature and humidity of indoor air suitable, and to use air channel and air inlet and air return, it is a common mode for large air conditioning system.
⒉ full water mode, cold water produced by the refrigerator (or hot water produced by the boiler) passes through the fan coil of the air-conditioned room.
⒊ the air-water mode is the combination of simple full air mode and full water mode, which has the characteristic of simple control of full water mode and the advantage of flexible adjustment of indoor air freshness in full air mode.
⒋ direct cooling method, which uses the refrigerant in the heat exchanger of the direct evaporative surface cooler to cool the indoor air by evaporation and absorption of heat, is widely used in various room air conditioners and small area central air conditioning systems.
However, the air conditioning systems all adopt commercial power supply, namely electricity supply, and have no heat storage and cold storage, so that the following defects exist:
⑴ the power supply comes from the commercial power grid or the off-grid power storage system, so the air conditioning system can not work in the off-grid or no power storage system state, and the use is inconvenient.
⑵ since the air conditioning system can instantly cool or heat, the power at the user end of the air conditioning system can not exceed the power at the heat generation end or the cold generation end, so that the adjustment range of the temperature range which can be supplied by the air conditioning system is small.
⑶ only have a single cooling or heating function, and cooling and heating cannot be used together.
⑷ has large power consumption, and is not in accordance with the energy-saving and environment-friendly idea advocated at present.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a constitute simple, energy-concerving and environment-protective, convenient to use, can improve the energy efficiency ratio's of heating off-grid photovoltaic energy storage formula air conditioning system.
The purpose of the utility model is realized through following measures: the utility model provides an off-grid photovoltaic energy storage formula air conditioning system which characterized in that: the air conditioning system comprises a control system, a photovoltaic system, a heat pump system and a heat storage system, wherein the photovoltaic system, the heat pump system and the heat storage system are respectively connected with the control system, the heat pump system mainly comprises a plurality of heat pumps, the heat storage system mainly comprises a plurality of heat storage devices, the heat storage devices adopt heat storage materials for heat storage, the photovoltaic system provides power for the whole air conditioning system, the photovoltaic system, the heat pump system and the heat storage system are sequentially connected, heat transfer occurs between the heat pump system and the heat storage system and is stored in the heat storage system so as to be provided for the air conditioning system for terminal.
The utility model discloses use photovoltaic system to supply power for whole air conditioning system for air conditioning system can work under the state from net or no electric power storage system, and energy consumption "nearly zero" of whole system realizes energy-concerving and environment-protective purpose, and whole air conditioning system adopts from the net mode, and no electric wire netting absorbs the burden, convenient to use, and is simple high-efficient. In addition, the heat storage system adopts heat storage materials for heat storage, and the heating energy efficiency ratio of the whole system is improved.
As an embodiment of the present invention, the heat pump system transfers heat to the heat storage system, and the heat storage system stores heat and supplies heat to the air conditioning system terminal.
As another embodiment of the present invention, the heat pump system transfers cold to the heat storage system, and the heat storage system stores cold and supplies cold for the air conditioning system terminal.
As another embodiment of the present invention, a part of the heat pumps in the heat pump system heats, another part of the heat pumps refrigerates, or the heat pumps alternately refrigerate or heat at different time intervals; one part of the heat storage devices in the heat storage system stores heat, the other part of the heat storage devices stores cold, the heat pump for heating is connected with the heat storage device for storing heat, the heat pump for refrigerating is connected with the heat storage device for storing cold, and heat supply and cold supply to the air conditioning system terminal are achieved by shunting at the same time.
As a preferred embodiment of the present invention, the heat pump has a liquid working medium inlet and a liquid working medium outlet, the heat storage device is internally provided with a heat storage pipeline in which a first liquid working medium flows, a heat release pipeline in which a second liquid working medium flows, or a cold storage pipeline in which a first liquid working medium flows, and a cold discharge pipeline in which a second liquid working medium flows, both ends of the heat storage pipeline or the cold storage pipeline are respectively connected to the liquid working medium inlet and the liquid working medium outlet, wherein the heat storage device with the heat storage pipeline is connected to the heat pump for heating, the heat storage device with the cold storage pipeline is connected to the heat pump for cooling, the first liquid working medium exchanges heat with the heat storage material in the phase change product in the heat storage device, and the heat storage material absorbs heat or absorbs cold and stores; and the second liquid working medium in the heat release pipeline or the cold release pipeline exchanges heat with the heat storage material, absorbs heat or cold and provides heat and cold required by the air conditioning system terminal.
As an optimized embodiment of the present invention, the heat storage device mainly comprises a closed container, a heat transfer medium and a phase change product, the heat transfer medium and the phase change product are located in the closed container, the heat transfer medium and the phase change product are filled in the inner space of the whole closed container, and the heat storage pipeline and the heat release pipeline or the cold storage pipeline and the liquid working medium in the cold discharge pipeline are heat exchanged through the heat transfer medium or directly with the phase change product.
The heat preservation has all been laid on the outer wall of airtight container and the whole pipeline that is located airtight container.
The phase change product mainly comprises the packing material that has airtight space and the heat accumulation material who is full of this packing material airtight space.
In a preferred embodiment of the present invention, the heat storage material for absorbing heat is a composite material mainly composed of two or more of aluminum ammonium sulfate, aluminum potassium sulfate, sodium acetate, calcium chloride, and paraffin.
In a preferred embodiment of the present invention, the heat storage material for cold storage is a composite material mainly composed of two or more of water, tetradecanoic paraffin, and sodium chloride solution.
In summer, the heat pump is started to heat, absorbs heat from the air to store, and then refrigerates; in non-summer time, the heat pump starts refrigeration first and then heats; the photovoltaic system is provided with a voltage regulating and power storage and supply device, electric power is preferentially supplied to the heat pump system for use, and residual electricity is stored in the power storage and supply device, so that the maximum power generation and transmission efficiency of the photovoltaic system is realized.
Compared with the prior art, the utility model discloses the effect that is showing as follows has:
⑴ the utility model discloses use photovoltaic system to supply power for whole air conditioning system, can make air conditioning system work under the state of leaving the net or not having electrical storage system, whole system's energy consumption "nearly zero", realize energy-concerving and environment-protective purpose.
⑵ because the utility model discloses whole air conditioning system adopts from the net mode, and no electric wire netting absorbs the burden, convenient to use, simple high efficiency.
⑶ the utility model discloses a heat storage system adopts heat accumulation material to carry out heat accumulation and cold-storage, has improved whole air conditioning system's the efficiency ratio of heating, and heat accumulation density of heat storage system is big, the constancy of temperature, and occupation space is little.
⑷ the utility model can supply cold and heat simultaneously, and can meet the demands of various cold and/or heat supplies of the air conditioning system terminal.
⑸ the utility model discloses the heat accumulation and the cold-storage total capacity of heat accumulation system are more than 3 times of the total daily work of air conditioning system terminal, and the air conditioning system can supply with the control range of temperature range big.
⑹ the utility model has simple composition, energy saving, environmental protection, strong practicability and wide application.
Drawings
The following provides a more detailed description of the present invention with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic view of the structure of the present invention;
fig. 2 is a schematic structural view of the heat storage device of the present invention.
Detailed Description
As shown in fig. 1 and 2, it is the utility model relates to an off-grid photovoltaic energy storage formula air conditioning system, it includes control system, the photovoltaic system who links to each other with control system respectively, heat pump system and heat accumulation system, heat pump system mainly comprises a plurality of heat pumps, in this embodiment, the heat pump adopts the air energy heat pump, heat accumulation system mainly comprises a plurality of heat storage devices, heat storage device adopts the heat accumulation material heat accumulation, photovoltaic system provides electric power for whole air conditioning system, photovoltaic system, heat pump system and heat accumulation system link to each other in proper order, take place the heat transfer and store in wherein by heat accumulation system between heat pump system and the heat accumulation system, so that provide air conditioning system terminal to use.
The photovoltaic system is provided with a voltage regulating and power storage and supply device, the power is preferentially supplied to the heat pump system for use, and the residual power is stored in the power storage and supply device, so that the maximum power generation and transmission efficiency of the photovoltaic system is realized.
In this embodiment, the utility model discloses off-grid photovoltaic energy storage formula air conditioning system can realize refrigeration and heat supply and use, satisfies the user demand of air conditioning system terminal customer simultaneous heating and cooling. One part of air in the heat pump system can be heated by the heat pump, the other part of air can be cooled by the heat pump, or the heat pump alternately cools or heats in time intervals. One part of the heat storage devices in the heat storage system stores heat, the other part of the heat storage devices stores cold, the air energy heat pump for heating is connected with the heat storage device for storing heat, and the air energy heat pump for refrigerating is connected with the heat storage device for storing cold, so that the air conditioning system supplies heat and cold to the air conditioning system terminal at the same time.
The air energy heat pump mainly comprises an air heat exchanger, a compressor, a water heat exchanger and an expansion valve. The heating energy efficiency ratio of the air energy heat pump is more than 4.
The heat supply principle of the air energy heat pump is as follows: during heating, liquid refrigerant is vaporized in the air heat exchanger to absorb heat in air, low-temperature and low-pressure gaseous refrigerant is compressed by the compressor and then is changed into high-temperature and high-pressure gas to be sent to the water heat exchanger, the refrigerant is cooled from the gaseous state to the liquid state due to the fact that the temperature of the refrigerant is higher than the temperature of water, the liquid refrigerant enters the air heat exchanger under the action of pressure after being throttled by the expansion valve, and the low-pressure gas refrigerant is vaporized again to complete one cycle. In this cycle, heat transfer from the air side to the water side is achieved with the change in the state of the refrigerant.
Air energy heat pump refrigeration principle: during refrigeration, the liquid refrigerant is vaporized in the water heat exchanger, so that the water temperature is reduced. The low-temperature low-pressure gaseous refrigerant is compressed by the compressor to be changed into high-temperature high-pressure gas, the high-temperature high-pressure gas enters the air heat exchanger, the refrigerant transfers heat to air due to the fact that the temperature of the refrigerant is higher than the temperature of the air, the refrigerant is condensed into high-pressure liquid through the gas, the high-pressure liquid refrigerant enters the water heat exchanger after being throttled by the expansion valve, the low-pressure liquid refrigerant is vaporized again, and a. During this cycle, heat is transferred from the water side to the air side as the refrigerant state changes.
In summer, the heat pump is started to heat firstly, absorbs heat from the air to store, and then carries out refrigeration; in non-summer time, the heat pump starts refrigeration first and then heats.
The heat pump is provided with a liquid working medium inlet 7 and a liquid working medium outlet 8, a heat storage pipeline 5 (or a cold storage pipeline) in which a first liquid working medium flows and a heat release pipeline 6 (or a cold release pipeline) in which a second liquid working medium flows are arranged in the heat storage device 4, two ends of the heat storage pipeline 5 (or the cold storage pipeline) are respectively connected with the liquid working medium inlet and the liquid working medium outlet, the heat storage device with the heat storage pipeline 5 is connected with the heat pump for heating, the heat storage device with the cold storage pipeline is connected with the heat pump for refrigerating, the first liquid working medium and a heat storage material in a phase change product 3 in the heat storage device 4 perform heat exchange, and the heat storage material absorbs heat or absorbs cold and stores; the second liquid working medium in the heat release pipeline 6 (or the cold release pipeline) exchanges heat with the heat storage material, absorbs heat or cold and provides heat and cold required by the air conditioning system terminal 9. In fact, the heat storage pipe 5 (or cold storage pipe) and the heat release pipe 6 (or cold release pipe) in the heat storage device 4 occupy the internal space of the heat storage device 4, respectively, and the heat storage pipe 5 and the heat release pipe 6 are staggered together (they are not in contact), instead of being heat storage pipes on one side and heat release pipes on the other side of the closed container as in fig. 2. Which liquid is specifically used for the first liquid working medium and the second liquid working medium is determined according to the heat transfer effect to be realized by the system and the heat transfer efficiency of the liquid working medium.
In the present embodiment, the thermal storage device is mainly composed of a closed container 1, a heat transfer medium 2 and a phase change product 3 in the closed container 1, the heat transfer medium 2 and the phase change product 3 fill the entire inner space of the closed container, and the heat transfer medium 2 is preferably water. The shape of the phase change product 3 (in fig. 2, the phase change product 3 is sketched as a circle) may be square, cylindrical, spherical, or the like. The phase change product 3 is mainly composed of a packing material with a closed space and a heat storage material filled in the closed space of the packing material. The packing material can be plastic sausages, stainless steel barrels, plastic bags or plastic balls and the like. The heat storage material for absorbing heat can be a composite material mainly composed of any two or more of aluminum ammonium sulfate, aluminum potassium sulfate, sodium acetate, calcium chloride and paraffin. The heat storage material for cold accumulation can be a composite material mainly composed of any two or more of water, carbon tetradecane paraffin and sodium chloride solution. The liquid working media in the heat storage pipeline 5 and the heat release pipeline 6 (or the cold storage pipeline and the cold release pipeline) exchange heat with the phase change product 3 through the heat transfer medium 2. In other embodiments, the liquid working mediums in the heat storage pipeline 5 and the heat release pipeline 6 (or the cold storage pipeline and the cold release pipeline) can also directly exchange heat with the phase-change products. Insulating layers are laid on the outer walls of the closed container 1 and all the pipelines in the closed container 1.
Heat storage process of the heat storage device (heat storage pipe 5): in a water heat exchanger of an air energy heat pump, high-temperature and high-pressure gaseous refrigerant transfers heat to water to form hot water, the hot water is output from the air energy heat pump, and the lowest temperature M of the hot water (the lowest temperature reached by heating of the air energy heat pump) is obtained; the phase change temperature of the heat storage material in the heat storage device does not exceed the minimum temperature M, and the larger the difference between the phase change temperature of the heat storage material and the output temperature of water is, the larger the power and the efficiency are; when water (first liquid working medium) flows through the heat storage pipeline, the water exchanges heat with the heat storage material, and the heat storage material absorbs the heat of the water and stores the heat.
Heat release process of the heat storage device (heat release line 6): when water (the second liquid working medium) flows through the heat release line 6, if the temperature of the water is lower than the minimum temperature M, i.e. lower than the phase change temperature of the heat storage material, the water absorbs heat from the heat storage material, which is a heat release process.
The cold accumulation process of the heat accumulation device: water is used as a first liquid working medium, the low-temperature first liquid working medium is output from the heat pump, the highest temperature ML of the first liquid working medium is higher than or equal to the phase change temperature of a heat storage material in the cold storage system, and for example, the heat storage material is a sodium chloride solution; when water flows through the cold absorption pipeline, the water exchanges heat with the heat storage material, heat transfer occurs, and the heat storage material transfers heat to the water, so that the water releases heat and stores cold.
The cooling process of the heat storage device is as follows: when water (second liquid working medium) flows through the cold discharge pipeline, if the temperature of the water is higher than the maximum temperature ML, namely higher than the phase change temperature of the heat storage material, the water releases heat into the heat storage material, and the temperature of the water is reduced, which is a cold discharge process.
The utility model discloses whole air conditioning system's theory of operation: the photovoltaic system sends the power generation state to the control system in real time, when the photovoltaic system generates power, the heat pump system receives the command of the control system and operates according to the date, time, environment temperature and the stock condition of the heat storage and cold accumulation system according to a set program; the heat and cold storage system instantly feeds back temperature, running time and state signals to the control system, and starts heat or cold supply devices (such as a pump and a fan) under the command of the control system. The air conditioning system terminal (the household cold and hot (warm) end) starts to use heat or cold according to the self requirement, and when the ambient temperature reaches a preset limit, the control system controls to close the corresponding heat storage supply. The control system is provided with a photovoltaic system for generating or storing electricity. The photovoltaic system, the heat pump system and the air conditioning system terminal are designed and matched in more than one power, the continuous use of the air conditioning system terminal can be met, and the total capacity matching of heat storage and cold storage is more than 3 times of the total daily work of the air conditioning system terminal.
The utility model discloses whole air conditioning system's constitution and power design: according to the area and heat preservation condition of the building and the requirement of using heat and cold, the heating power and the cooling power of the building are determined, and the total power is obtained. And selecting the maximum power, and determining the total power of the photovoltaic array according to the local sunshine hours and the system efficiency. And determining the power of the heat pump according to the power of the battery array. According to the heating power and the refrigerating power of the heat pump, the capacity of the heat storage and cold storage system and the heat storage and heat storage power are determined, the capacity of the heat storage and cold storage system is at least 3 times larger than the total quantity of heat and cold demands of the building on the same day, and the heat release or cold release of the heat storage and cold storage system is not lower than the determined power of the heat and cold demands on the same day. The heat supply system in the building comprises a floor heating system or a wind heating system, domestic water and the like, and the cold supply system in the building comprises a wind cooling system, an ice storage cabinet and the like.
In other embodiments, the heat pump system transfers heat to a thermal storage system, which stores heat and provides heat to the air conditioning system terminals; or the heat pump system transfers cold to the heat storage system, and the heat storage system stores cold and supplies cold for the air conditioning system terminal.
The embodiment of the present invention is not limited to this, according to the above-mentioned content of the present invention, according to the common technical knowledge and the conventional means in this field, without departing from the basic technical idea of the present invention, the present invention can also make other modifications, replacements or changes in various forms, all fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides an off-grid photovoltaic energy storage formula air conditioning system which characterized in that: the air conditioning system comprises a control system, a photovoltaic system, a heat pump system and a heat storage system, wherein the photovoltaic system, the heat pump system and the heat storage system are respectively connected with the control system, the heat pump system mainly comprises a plurality of heat pumps, the heat storage system mainly comprises a plurality of heat storage devices, the heat storage devices adopt heat storage materials for heat storage, the photovoltaic system provides power for the whole air conditioning system, the photovoltaic system, the heat pump system and the heat storage system are sequentially connected, heat transfer occurs between the heat pump system and the heat storage system and is stored in the heat storage system so as to be provided for the air conditioning system for terminal.
2. The off-grid photovoltaic energy-storing air conditioning system according to claim 1, wherein: the heat pump system transfers heat to the heat storage system, and the heat storage system stores heat and supplies heat to the air conditioning system terminal.
3. The off-grid photovoltaic energy-storing air conditioning system according to claim 1, wherein: the heat pump system transfers cold to the heat storage system, and the heat storage system stores cold and supplies cold for the air conditioning system terminal.
4. The off-grid photovoltaic energy-storing air conditioning system according to claim 1, wherein: one part of the heat pump in the heat pump system heats, the other part of the heat pump refrigerates, or the heat pump alternately refrigerates or heats in periods; one part of the heat storage devices in the heat storage system stores heat, the other part of the heat storage devices stores cold, the heat pump for heating is connected with the heat storage device for storing heat, the heat pump for refrigerating is connected with the heat storage device for storing cold, and heat supply and cold supply to the air conditioning system terminal are achieved by shunting at the same time.
5. The off-grid photovoltaic energy-storing air conditioning system according to claim 4, wherein: the heat pump is provided with a liquid working medium inlet and a liquid working medium outlet, a heat storage pipeline in which a first liquid working medium flows and a heat release pipeline in which a second liquid working medium flows or a cold storage pipeline in which the first liquid working medium flows and a cold discharge pipeline in which the second liquid working medium flows are arranged in the heat storage device, and two ends of the heat storage pipeline or the cold storage pipeline are respectively connected with the liquid working medium inlet and the liquid working medium outlet, wherein the heat storage device with the heat storage pipeline is connected with the heat pump for heating, the heat storage device with the cold storage pipeline is connected with the heat pump for refrigerating, the first liquid working medium and a heat storage material in a phase change product in the heat storage device perform heat exchange, and the heat storage material absorbs heat or absorbs cold and stores the heat; and the second liquid working medium in the heat release pipeline or the cold release pipeline exchanges heat with the heat storage material, absorbs heat or cold and provides heat and cold required by the air conditioning system terminal.
6. The off-grid photovoltaic energy-storing air conditioning system according to claim 5, wherein: the heat storage device mainly comprises a closed container, a heat transfer medium and a phase change product, wherein the heat transfer medium and the phase change product are positioned in the closed container, the inner space of the whole closed container is filled with the heat transfer medium and the phase change product, and liquid working media in the heat storage pipeline and the heat release pipeline or the cold storage pipeline and the cold release pipeline are subjected to heat exchange with the phase change product through the heat transfer medium or directly.
7. The off-grid photovoltaic energy-storing air conditioning system according to claim 6, wherein: the phase change product mainly comprises a packaging material with a closed space and a heat storage material filled in the closed space of the packaging material.
8. The off-grid photovoltaic energy-storing air conditioning system according to claim 7, wherein: insulating layers are laid on the outer walls of the closed container and all pipelines in the closed container; in summer, the heat pump is started to heat firstly, absorbs heat from the air to store, and then carries out refrigeration; in non-summer time, the heat pump starts refrigeration first and then heats; the photovoltaic system is provided with a voltage regulating and power storage and supply device, electric power is preferentially supplied to the heat pump system for use, and residual electricity is stored in the power storage and supply device, so that the maximum power generation and transmission efficiency of the photovoltaic system is realized.
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| CN201920022035.3U CN210014498U (en) | 2019-01-07 | 2019-01-07 | Off-grid photovoltaic energy storage type air conditioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681993A (en) * | 2019-01-07 | 2019-04-26 | 河北创实新材料科技有限公司 | A kind of off-network photovoltaic energy storage formula air-conditioning system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109681993A (en) * | 2019-01-07 | 2019-04-26 | 河北创实新材料科技有限公司 | A kind of off-network photovoltaic energy storage formula air-conditioning system |
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