CN115183497A - Cooling, heating and power supply system and cooling, heating and power supply method - Google Patents
Cooling, heating and power supply system and cooling, heating and power supply method Download PDFInfo
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- CN115183497A CN115183497A CN202210804037.4A CN202210804037A CN115183497A CN 115183497 A CN115183497 A CN 115183497A CN 202210804037 A CN202210804037 A CN 202210804037A CN 115183497 A CN115183497 A CN 115183497A
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- 238000001816 cooling Methods 0.000 title claims abstract description 77
- 238000010438 heat treatment Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000005611 electricity Effects 0.000 claims abstract description 5
- 238000010248 power generation Methods 0.000 claims description 58
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 23
- 239000003507 refrigerant Substances 0.000 claims description 10
- 238000002485 combustion reaction Methods 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 5
- 239000000446 fuel Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 description 12
- 230000008878 coupling Effects 0.000 description 5
- 238000010168 coupling process Methods 0.000 description 5
- 238000005859 coupling reaction Methods 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 5
- 230000004044 response Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000002918 waste heat Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004992 fission Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
- F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K13/00—General layout or general methods of operation of complete plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K7/00—Steam engine plants characterised by the use of specific types of engine; Plants or engines characterised by their use of special steam systems, cycles or processes; Control means specially adapted for such systems, cycles or processes; Use of withdrawn or exhaust steam for feed-water heating
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- 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
- H02S10/00—PV power plants; Combinations of PV energy systems with other systems for the generation of electric power
- H02S10/30—Thermophotovoltaic systems
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Abstract
The invention relates to the technical field of energy supply, in particular to a cooling, heating and power supply system and a cooling, heating and power supply method. The cooling, heating and power supply system comprises a photovoltaic and photo-thermal integrated device and a cooling and heating supply device, the photovoltaic and photo-thermal integrated device comprises a photovoltaic module and a photo-thermal module, the photovoltaic module is used for converting solar energy into electric energy and supplying power to a user side, and the photo-thermal module is used for converting solar energy into heat energy; the cold and heat supply device is connected with the photo-thermal assembly and the user side respectively and used for converting mechanical energy and heat energy converted by the photo-thermal assembly and supplying heat or cold to the user side. The cold, heat and electricity supply system provided by the invention can supply the heat energy converted by the photo-thermal component from the solar energy to the cold and heat supply device, and the part of the heat energy is recycled by the cold and heat supply device, so that a low-temperature heat source is provided for the cold and heat supply device, and the utilization efficiency of renewable energy is improved.
Description
Technical Field
The invention relates to the technical field of energy supply, in particular to a cooling, heating and power supply system and a cooling, heating and power supply method.
Background
The cold, heat and electricity supply system is a modern energy supply system, and compared with a traditional centralized energy supply system, the energy supply system is arranged close to the side of a user end, is flexible in arrangement and various in structure, can integrally coordinate and meet the requirements of the user end for cold, heat and electricity, and has the advantages of high energy efficiency, cleanness, environmental protection, good safety, good economic benefit and the like.
The cold and hot electricity supply system generally comprises a photovoltaic and photo-thermal integrated device and a cold and hot supply device, wherein the cold and hot supply device can supply cold or heat for a user side, the photovoltaic and photo-thermal integrated device converts solar energy into electric energy and then supplies the electric energy to the user side, and when the solar energy is converted into the electric energy, part of the solar energy can be converted into heat energy to cause resource waste.
Disclosure of Invention
Therefore, the present invention is directed to overcome the problem of wasting heat energy resources in the cooling and heating system in the prior art, and to provide a cooling and heating system and a cooling and heating method for recycling heat energy converted from solar energy.
In order to solve the above problems, the present invention provides a cooling, heating and power supply system, which includes a photovoltaic and photothermal integrated device and a cooling and heating supply device, wherein the photovoltaic and photothermal integrated device includes a photovoltaic module and a photothermal module, the photovoltaic module is used for converting solar energy into electric energy and supplying power to a user side, and the photothermal module is used for converting solar energy into heat energy; the cold and heat supply device is connected with the photo-thermal assembly and the user side respectively and used for converting mechanical energy and heat energy converted by the photo-thermal assembly and supplying heat or cold to the user side.
The invention provides a cooling, heating and power supply system, which further comprises a power generation device, wherein the power generation device is configured to convert mechanical energy into electric energy, the power generation device comprises a power output end and a heat output end, and the power output end is used for supplying power to a user end; the heat output end is connected with the cold and heat supply device.
The cold, heat and power supply system further comprises a power device, wherein the power device is used for converting chemical energy of fuel into mechanical energy, and a power output end of the power device is connected with a power input end of the power generation device and a power input end of the cold and heat supply device.
The cold, heat and power supply system further comprises a power distribution device, wherein the power device is connected with the power generation device and the cold and heat supply device through the power distribution device, and the power distribution device is used for adjusting the distribution ratio of the power output by the power device to the power generation device and the power output to the cold and heat supply device.
The cooling, heating and power supply system further comprises a feedback control device which is in communication connection with the user side and the power distribution device respectively and is suitable for adjusting the distribution proportion according to the electric load requirement and the cooling and heating load requirement of the user side.
The cold, heat and power supply system further comprises a gearbox, wherein the power device is an internal combustion engine, and the gearbox is connected between the internal combustion engine and the power distribution device.
The invention provides a cooling, heating and power supply system, wherein the cooling and heating supply device comprises:
the power input end of the compressor is connected with the power output end of the power device;
the condenser comprises a refrigerating/heating channel communicated with the user side;
and an evaporator connected with the compressor and the condenser in sequence to form a circulation passage for the circulation of the refrigerant.
In the cooling, heating and power supply system provided by the invention, the cooling and heating device further comprises a throttle valve, and the throttle valve is connected between the evaporator and the condenser.
In the cooling, heating and power supply system provided by the invention, the cooling and heating supply device further comprises a water pump, and the water pump is connected between the user side and the condenser.
The invention also provides a cooling and heating power supply method, which uses the cooling and heating power supply system to supply cooling and heating power to a user side, and the cooling and heating power supply method comprises the following steps:
the photovoltaic module of the photovoltaic and photothermal integrated device converts solar energy into electric energy and supplies power to the user side, and the photothermal module converts the solar energy into heat energy and transmits the heat energy to the cold and heat supply device;
the cold and heat supply device converts mechanical energy and the heat energy converted by the photo-thermal assembly and supplies heat or cold to the user side.
The invention has the following advantages:
1. according to the cold, heat and power supply system provided by the invention, the photovoltaic module of the photovoltaic and photothermal integrated device can supply power to the user side, the cold and heat supply device can supply heat or cold to the user side, the cold and heat supply device is respectively connected with the photothermal module and the user side, the heat energy converted from the solar energy by the photothermal module can be supplied to the cold and heat supply device, the part of heat energy is recycled by the cold and heat supply device, and the low-temperature heat source is provided for the cold and heat supply device, so that the utilization efficiency of renewable energy sources is improved. And photovoltaic light and heat integrated device and cold and hot supply device are independent each other, can adjust power supply and cold and hot supply alone, and the flexibility is higher, and system response speed is faster, and whole robustness is higher.
2. The cold, heat and power supply system further comprises a power generation device, the power generation device comprises a power output end and a heat output end, the power output end can supply power to the user side, the heat output end is connected with the cold and heat supply device, waste heat of exhaust smoke generated by the power generation device is recycled, and the utilization efficiency of renewable energy is improved.
3. The cold and heat power supply system further comprises a power device, wherein the power device can provide power for the power generation device and the cold and heat supply device, drive the power generation device to generate power and drive the cold and heat supply device to supply heat or cool.
4. The cooling, heating and power supply system further comprises a power distribution device, and the distribution proportion of power output by the power device to the power generation device and the cooling and heating supply device can be adjusted, so that the cooling, heating and power supply system can better respond to the requirements of a user side.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 shows a schematic configuration diagram of a cooling, heating and power supply system according to the present invention.
Description of the reference numerals:
1. a photovoltaic and photothermal integrated device; 2. a cold and hot supply device; 21. a compressor; 22. a condenser; 23. an evaporator; 24. a throttle valve; 25. a water pump; 3. a user side; 4. a power generation device; 5. a power plant; 6. a power distribution device; 7. a feedback control device; 8. a gearbox; 9. a coupling is provided.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example one
As shown in fig. 1, the cooling, heating and power supply system provided in this embodiment includes a photovoltaic and photothermal integrated device 1 and a cooling and heating supply device 2, where the photovoltaic and photothermal integrated device 1 includes a photovoltaic module and a photothermal module, the photovoltaic module is used for converting solar energy into electric energy and supplying power to a user terminal 3, and the photothermal module is used for converting solar energy into heat energy; the cold and heat supply device 2 is connected with the photo-thermal component and the user side 3 respectively, and is used for converting mechanical energy and heat energy converted by the photo-thermal component and supplying heat or cold to the user side 3.
Photovoltaic module of photovoltaic light and heat integrated device 1 can supply power to user's end 3, and cold and hot feeding mechanism 2 can supply heat or the cooling to user's end 3, cold and hot feeding mechanism 2 with light and heat subassembly and user's end 3 are connected respectively, can supply cold and hot feeding mechanism 2 with light and heat subassembly from the heat energy of solar energy conversion, and this part heat energy is carried out recycle by cold and hot feeding mechanism 2, provides the low temperature heat source for cold and hot feeding mechanism 2 and has improved renewable energy's utilization efficiency. And photovoltaic light and heat integrated device 1 and cold and hot supply device 2 are independent each other, can adjust power supply and cold and hot supply alone, and the flexibility is higher, and system response speed is faster, and whole robustness is higher.
In a specific embodiment, the integrated photovoltaic and photothermal device 1 may be a liquid cooling type PVT heat collector, and may also be an air cooling type PVT heat collector. The liquid cooling type PVT heat collector uses water or other media to cool the photovoltaic panel of the photovoltaic module, and the water or other media absorbs the heat energy converted from the solar energy and can be delivered to the cold and heat supply device 2.
The cooling, heating and power supply system provided by this embodiment further includes a power generation device 4, where the power generation device 4 is configured to convert mechanical energy into electrical energy, and the power generation device 4 includes a power output end and a heat output end, and the power output end is used to supply power to the user end 3; the heat output end is connected with the cold and heat supply device 2. The power output end can supply power to the user end 3, waste heat of exhaust smoke can be generated in the power generation process of the power generation device 4, the heat output end is connected with the cold and heat supply device 2, the waste heat of exhaust smoke generated by the power generation device 4 is recycled, and the utilization efficiency of renewable energy is improved. The power generation device 4 and the photovoltaic and photothermal integrated device 1 provide power for the user side 3 together, and the requirement of the user side 3 on the power is guaranteed. The power generation device 4 can increase the power supply capacity of the cooling and heating power supply system when the user side 3 has a large demand for the electrical load, and can also ensure the power supply capacity of the cooling and heating power supply system when the photovoltaic and photothermal integrated device 1 cannot supply a large amount of electrical power at night.
The power generation device 4 can be driven by a water turbine, a steam turbine, a diesel engine or other power device 5, and converts energy generated by water flow, air flow, fuel combustion or nuclear fission into mechanical energy to be transmitted to the power generation device 4, and then the mechanical energy is converted into electric energy by the power generation device 4.
The cooling, heating and power supply system of the present embodiment further includes a power device 5, the power device 5 is configured to convert chemical energy of fuel into mechanical energy, and a power output end of the power device 5 is connected to both a power input end of the power generation device 4 and a power input end of the cooling, heating and power supply device 2. The power device 5 can provide power for the power generation device 4 and the cold and heat supply device 2, drive the power generation device 4 to generate power, and drive the cold and heat supply device 2 to supply heat or cool. The power device 5 directly drives the power generation device 4 and the cold and heat power supply device, so that the cold and heat power supply device is prevented from being driven again by electric energy. Specifically, the power generation device 4 and the cold and heat supply device 2 may be equipped with at least one power device 5, respectively, and also may be equipped with at least one power device 5 to drive both the power generation device 4 and the cold and heat supply device 2.
Specifically, the photovoltaic module of the integrated photovoltaic and photothermal device 1 converts solar energy into electric energy and then directly supplies power to the user side 3, the power device 5 converts chemical energy of fuel into mechanical energy, and then the power device 4 converts the mechanical energy into electric energy and then supplies power to the user side 3, the cold and hot supply device 2 converts the mechanical energy into heat energy, and the number of times of energy conversion of the whole cold and hot power supply system is small. In addition, when the number of times of energy conversion is small, the overall energy utilization rate of the cooling, heating and power supply system can be maintained at a high level.
As an alternative embodiment, the power plant 5 may be another power plant 5 such as a water turbine or a steam turbine.
The cooling, heating and power supply system of the present embodiment further includes a power distribution device 6, the power device 5 is connected to both the power generation device 4 and the cooling and heating supply device 2 through the power distribution device 6, and the power distribution device 6 is configured to adjust a distribution ratio between the power output from the power device 5 to the power generation device 4 and the power output from the cooling and heating supply device 2, so that the cooling, heating and power supply system can better respond to the demand of the user end 3. Because power generation facility 4 and cold and hot supply unit 2 are relatively independent, so when user's end 3 electric load demand changes with the electric demand, can adjust the power supply alone, when user's end 3 cold and hot load demand changes with cold and with the hot demand, can adjust alone cold and hot supply, it is higher to adjust the flexibility, and system response speed is faster, and whole robustness is higher.
For example, when the user terminal 3 has more electrical load demand and less cooling and heating load demand, the power distribution device 6 can increase the ratio of the mechanical energy supplied to the power generation device 4 by the power device 5, and decrease the ratio of the mechanical energy supplied to the cooling and heating supply device 2 by the power device 5, that is, more mechanical energy of the power energy is supplied to the power generation device 4; on the contrary, when the user end 3 has a smaller electrical load demand and a larger cooling and heating load demand, the power distribution device 6 can decrease the ratio of the mechanical energy supplied from the power device 5 to the power generation device 4 and increase the ratio of the mechanical energy supplied from the power device 5 to the cooling and heating device 2, i.e. more mechanical energy of the power device 5 is supplied to the cooling and heating device 2.
The cooling, heating and power supply system of this embodiment further includes a feedback control device 7, which is in communication with the user end 3 and the power distribution device 6, and is adapted to adjust the distribution ratio according to the electrical load demand and the cooling and heating load demand of the user end 3.
In this embodiment, the user side 3 is provided with a terminal system, and the terminal system stores information about the electrical load demand and the cold and heat load demand of the user side 3, and the information about the demand may be relatively fixed or may be adjusted in real time. The terminal system may be a mobile terminal, or may be a controller disposed indoors or outdoors at the user end 3. The feedback control device 7 is an electronic controller, and the electronic controller is in communication connection with a data system, and can acquire the electric load demand and the cold and hot load demand information of the user terminal 3, and further feed back the demand information to the power distribution device 6, so as to control the power distribution device 6 to adjust the proportion of the mechanical energy supplied to the power generation device 4 and the cold and hot supply device 2. Illustratively, the electronic controller may be a PLC, which is not described herein since it is a prior art. Specifically, under the adjustment of the feedback control device 7, the ratio of the thermal energy output by the cold and heat supply device 2 to the electric energy output by the power generation device 4 can be adjusted within the interval of 0 to 2.3.
The cooling, heating and power supply system of the present embodiment further includes a transmission 8, the power device 5 is an internal combustion engine, and the transmission 8 is connected between the internal combustion engine and the power distribution device 6. The gearbox 8 effects a variable speed adjustment so that the rotational speed of the internal combustion engine is more matched to the power plant 4 and the cold and heat supply device 2. Preferably, the gearbox 8 is a gear gearbox 8.
The cooling, heating and power supply system of this embodiment further includes a variable coupling 9, and the transmission 8 is connected to the power distribution device 6 through the variable coupling 9. The power split device 6 may be a gear transmission device comprising one input shaft and at least two output shafts. The input shaft of the power split device 6 is connected to the transmission case 8 through a variable coupling 9.
The cold and heat supplying device 2 of the present embodiment includes a compressor 21, a condenser 22, and an evaporator 23; the power input end of the compressor 21 is connected with the power output end of the power device 5; the condenser 22 comprises a cooling/heating channel communicated with the user end 3; the evaporator 23 is connected to the compressor 21 and the condenser 22 in this order to form a circulation path through which a refrigerant flows. The compressor 21 is connected in parallel with the power generation device 4. The power input end of the compressor 21 is connected with the power output end of the power device 5.
The compressor 21 is driven by the power unit 5 to operate. The heating process of the cold and heat supplying means 2 includes the operation of the compressor 21 to compress the refrigerant into refrigerant vapor of high temperature and high pressure. The condenser 22 is connected to the compressor 21, and the refrigerant vapor from the compressor 21 can be condensed by the condenser 22, and the heat is released to the cooling/heating passage to heat the water or air at the user end 3; the evaporator 23 is used for gasifying the refrigerant and absorbing heat from the photothermal component of the integrated photovoltaic and photothermal device 1 and the heat output end of the heating device; the evaporator 23 is also connected to the compressor 21 to feed the refrigerant into the compressor 21 to form a circulation circuit. Preferably, the condenser 22 can achieve an adjustment of the output power of 0-100%. The power generation device 4 can be a generator, and the generator can realize the adjustment of 30% -100% of output power.
The cold and heat supplying device 2 of the present embodiment further includes a throttle valve 24, and the throttle valve 24 is connected between the evaporator 23 and the condenser 22. A throttle 24 is connected to the condenser 22 for throttling down the refrigerant.
The cold and heat supplying device 2 of the present embodiment further includes a water pump 25, and the water pump 25 is connected between the user terminal 3 and the condenser 22. The refrigeration/heating channel of the condenser 22 is communicated with the user terminal 3 through a water return pipeline, the water pump 25 is arranged on the water return pipeline, heat exchange water can be provided for the condenser 22 through the water return pipeline, the condenser 22 enables the heat exchange water to exchange heat with the refrigerant, hot water is obtained, the hot water is supplied to the user terminal 3 through the water pump 25, and the user terminal 3 can use the hot water conveniently.
In other embodiments, when the cold and heat supplying device 2 is used, the user terminal 3 may be directly supplied with heat through the condenser 22, and the user terminal 3 may be directly supplied with cold through the evaporator 23.
In the specific embodiment, the internal combustion engine, the gearbox 8, the variable coupling 9 and the input shaft of the power distribution device 6 are sequentially in transmission connection, one output shaft of the power distribution device 6 is in transmission connection with the power generation device 4, and the other output shaft is in transmission connection with the compressor 21 of the cold and heat supply device 2. After power transmission and distribution are realized, the power generation device 4 can obtain partial mechanical energy and directly convert the partial mechanical energy into electric energy, and then power is supplied to the user end 3 through facilities such as electric wires. The compressor 21 can convert a part of the mechanical energy into gas internal energy, and then convert the gas internal energy into heat energy through other parts of the cooling and heating device 2 to supply cooling or heating for the user terminal 3.
The embodiment further discloses a cooling and heating power supply method, which uses the cooling and heating power supply system to supply cooling and heating power to the user end 3, and specifically the cooling and heating power supply method includes: the photovoltaic module of the integrated photovoltaic, photothermal and thermal device 1 converts solar energy into electric energy and supplies power to the user side 3, and the photothermal module converts solar energy into heat energy and transmits the heat energy to the cold and heat supply device 2; the cold and heat supply device 2 converts the mechanical energy and the heat energy converted by the photothermal element and supplies heat or cold to the user side 3. The photothermal element supplies the heat energy converted from the solar energy to the cold and heat supply device 2, and the part of the heat energy is recycled by the cold and heat supply device 2, so that the low-temperature heat source is provided for the cold and heat supply device 2, and the utilization efficiency of the renewable energy is improved. And photovoltaic light and heat integrated device 1 and cold and hot supply device 2 are mutually independent, can carry out independent regulation to power supply and cold and hot supply, and the flexibility is higher, and system response speed is faster, and whole robustness is higher.
The cooling, heating and power supply method of the embodiment further comprises the following steps: the power generation device 4 converts mechanical energy into electric energy, supplies power to the user terminal 3 through the power output terminal, and supplies heat energy generated in the power generation process to the cold and heat supply device 2 through the heat output terminal.
In this embodiment, before the step of converting the mechanical energy into the electrical energy by the power generation device 4, a part of the mechanical energy is obtained by the power device 5, and another part of the mechanical energy is obtained by the cold and hot supply device 2 by the power device 5.
The cooling, heating and power supply method of the present embodiment further includes: the power feedback device adjusts the distribution ratio of the power output from the power device 5 to the power generation device 4 and the power output from the cold and hot supply device 2 according to the electric load demand and the cold and hot load demand of the user terminal 3.
At the adjustment timing, the adjustment of the above-described distribution ratio may be completed before the mechanical energy is distributed to the power generation device 4 and the cold and heat supply device 2; or the mechanical energy can be firstly distributed to the power generation device 4 and the cold and heat supply device 2 according to a certain distribution proportion and then the proportion is adjusted in the system operation process.
Example two
The present embodiment provides a cooling, heating and power supply system, which is substantially the same as the cooling, heating and power supply system provided in the first embodiment, and the main differences are as follows: the power unit 5 is provided in plurality, and the plurality of power units 5 are arranged in parallel. In the embodiment, at least one power device 5 is in transmission connection with the cold and heat supply device 2, and at least one power device 5 is in transmission connection with the power generation device 4.
When a plurality of power devices 5 are provided, the total operation number of the power devices 5 can be adjusted by independently controlling a single power device 5, so that the total output power of the plurality of power devices 5 can be more conveniently controlled, and the cooling, heating and power requirements of the user terminal 3 can be better matched. For example, when the sum of the electrical load demand and the cooling and heating load demand of the user terminal 3 is large, a large number of power units 5 can be controlled to operate, so as to ensure that the total output power of the power units 5 can ensure the demand of the user terminal 3; when the sum of the electric load demand and the cold and hot load demand of the user terminal 3 is small, a small number of power devices 5 can be controlled to operate, so that waste caused by overlarge total output power of the power devices 5 is avoided.
Furthermore, a power synthesis device is also arranged in the cooling, heating and power supply system. The power combining device is provided between the plurality of power devices 5 and the power generation device 4 and the cold and heat supply device 2, and is configured to combine the mechanical energy provided by the plurality of power devices 5 and supply the combined mechanical energy to the power generation device 4 and the cold and heat supply device 2.
In the present embodiment, the power combining device is provided upstream of the power split device 6 to supply the combined mechanical energy to the power split device 6 first, and then distribute the mechanical energy to the power generation device 4 and the cold and heat supply device 2 through the power split device 6. Preferably, the power combining means may be a power combiner, which is a planetary gear transmission including a plurality of input shafts and one output shaft.
In this embodiment, the feedback control device 7 is also connected to the plurality of power devices 5 in a communication manner. The feedback control device 7 can obtain the sum of the electric load demand and the cold and hot load demand of the user end 3, and then transmit the information to the power device 5 to adjust the operation number of the power device 5.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A cooling-heating-power supply system, comprising:
the photovoltaic and photothermal integrated device (1) comprises a photovoltaic component and a photothermal component, wherein the photovoltaic component is used for converting solar energy into electric energy and supplying power to a user side (3), and the photothermal component is used for converting the solar energy into heat energy;
and the cold and heat supply device (2) is respectively connected with the photo-thermal component and the user side (3) and is used for converting mechanical energy and heat energy converted by the photo-thermal component and supplying heat or cold to the user side (3).
2. A cold-thermal power supply system according to claim 1, further comprising a power generation device (4), said power generation device (4) being configured for converting mechanical energy into electrical energy, said power generation device (4) comprising a power output for supplying power to said user terminal (3) and a heat output; the heat output end is connected with the cold and heat supply device (2).
3. A cold-heat-electricity supply system according to claim 2, characterized by further comprising a power plant (5), said power plant (5) being adapted to convert chemical energy of fuel into mechanical energy, a power output of said power plant (5) being connected to both a power input of said power generation means (4) and a power input of said cold-heat supply means (2).
4. A cooling-heating-power supply system according to claim 3, characterized by further comprising a power split device (6), the power device (5) being connected to both the power generation device (4) and the cold-heat supply device (2) through the power split device (6), the power split device (6) being configured to adjust a split ratio of power output by the power device (5) to the power generation device (4) and power output to the cold-heat supply device (2).
5. A cold-heat-electricity supply system according to claim 4, further comprising a feedback control device (7) in communication with said user terminal (3) and said power distribution device (6), respectively, adapted to adjust said distribution ratio according to the electrical load demand and the cold-heat load demand of said user terminal (3).
6. A cold-heat-electricity supply system according to claim 4, further comprising a gearbox (8), said power plant (5) being an internal combustion engine, said gearbox (8) being connected between said internal combustion engine and said power distribution device (6).
7. A cold-heat electricity supply system according to any one of claims 3-6, wherein said cold-heat supply device (2) comprises:
the power input end of the compressor (21) is connected with the power output end of the power device (5);
a condenser (22) comprising a cooling/heating channel communicating with the user terminal (3);
and an evaporator (23) connected in series to the compressor (21) and the condenser (22) to form a circulation path through which a refrigerant flows.
8. A cold-heat-electricity supply system according to claim 7, characterized in that said cold-heat-supply device (2) further comprises a throttle valve (24), said throttle valve (24) being connected between said evaporator (23) and said condenser (22).
9. A cold-heat-electricity supply system according to claim 7, characterized in that said cold-heat-supply device (2) further comprises a water pump (25), said water pump (25) being connected between said user terminal (3) and said condenser (22).
10. A cooling and heating power supply method for supplying cooling and heating power to a user side (3) using the cooling and heating power supply system according to any one of claims 1 to 9, the cooling and heating power supply method comprising:
the photovoltaic component of the photovoltaic and photothermal integrated device (1) converts solar energy into electric energy and supplies power to the user side (3), and the photothermal component converts the solar energy into heat energy and transmits the heat energy to the cold and heat supply device (2);
the cold and heat supply device (2) converts mechanical energy and the heat energy converted by the photo-thermal assembly and supplies heat or cold to the user side (3).
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| CN202210804037.4A CN115183497A (en) | 2022-07-07 | 2022-07-07 | Cooling, heating and power supply system and cooling, heating and power supply method |
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| CN202210804037.4A CN115183497A (en) | 2022-07-07 | 2022-07-07 | Cooling, heating and power supply system and cooling, heating and power supply method |
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