CN113720039A - Heating and refrigerating system based on forward and reverse cycle coupling - Google Patents
Heating and refrigerating system based on forward and reverse cycle coupling Download PDFInfo
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- CN113720039A CN113720039A CN202111038349.0A CN202111038349A CN113720039A CN 113720039 A CN113720039 A CN 113720039A CN 202111038349 A CN202111038349 A CN 202111038349A CN 113720039 A CN113720039 A CN 113720039A
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- 230000008878 coupling Effects 0.000 title claims abstract description 26
- 238000010168 coupling process Methods 0.000 title claims abstract description 26
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 26
- 238000010438 heat treatment Methods 0.000 title claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000005057 refrigeration Methods 0.000 claims abstract description 37
- 239000003507 refrigerant Substances 0.000 claims description 30
- 230000006835 compression Effects 0.000 claims description 13
- 238000007906 compression Methods 0.000 claims description 13
- 239000007788 liquid Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 230000008569 process Effects 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 2
- 230000007246 mechanism Effects 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 239000002803 fossil fuel Substances 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
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- 239000000463 material Substances 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 238000012986 modification 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
- 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
- F25B27/00—Machines, plants or systems, using particular sources of energy
- F25B27/002—Machines, plants or systems, using particular sources of energy using solar energy
- F25B27/005—Machines, plants or systems, using particular sources of energy using solar energy in compression type systems
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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Abstract
The invention discloses a heat supply and refrigeration system based on positive and negative cycle coupling. The heat collected by the solar heat collection unit is transferred to a generator in the organic Rankine cycle unit, an organic working medium in the generator is evaporated to form steam and enters an expander, mechanical energy output by the expander in the organic Rankine cycle unit in a working mode is transferred to a compressor of the heat supply and refrigeration unit through a direct drive shaft to drive the heat supply and refrigeration unit, the evaporator in the heat supply and refrigeration unit absorbs heat, the water temperature in the cold water tank is lowered, meanwhile, a condenser in the heat supply and refrigeration unit releases heat, water in the hot water tank is heated, the system does not need extra electric energy to drive the compressor, and low-grade solar energy can be fully utilized to achieve refrigeration and heat supply.
Description
Technical Field
The invention relates to the technical field of heating and refrigeration, in particular to a heating and refrigeration system based on forward and reverse cycle coupling.
Background
The heat pump has the advantages of energy conservation, environmental protection, reliable performance and the like, the refrigeration and heat supply unit absorbs energy in cold water, the heat is converted into heat under the action of the compressor and transferred into the hot water tank, meanwhile, low-temperature chilled water losing a large amount of energy is conveyed to a space needing to be cooled, the refrigeration and heat supply unit has the function and effect of one machine with multiple purposes, but the compressor in the steam compression circulation needs to be driven by electric energy to realize the heat supply and refrigeration functions, the electric energy for driving the steam compression circulation mainly comes from combustion of fossil fuels, and energy pollution caused by combustion of the fossil fuels mainly comprising coal is the main cause of haze.
Solar energy is not only a primary energy source, but also a renewable energy source, has rich resources, can be used freely, does not need transportation, and has no pollution to the environment. Solar energy, instead of electrical energy converted from fossil fuels, has become an important component of energy used by human beings, and is continuously developed, so that the use of electrical energy can be effectively reduced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a heat supply and refrigeration system based on forward and reverse cycle coupling, which realizes the double functions of refrigeration and heat supply by using solar energy to replace electric energy converted from fossil fuel to drive a compressor in a vapor compression cycle.
In order to achieve the purpose, the invention adopts the following technical scheme:
a heating and cooling system based on forward and reverse cycle coupling, comprising:
a solar heat collection unit for absorbing solar energy and converting the solar energy to generate heat energy while storing the heat energy;
the organic Rankine cycle unit is used for heating the liquid organic working medium of the organic Rankine cycle unit to form a gaseous organic working medium by utilizing the heat energy stored by the solar heat collection unit; and the number of the first and second groups,
and the heat supply and refrigeration unit is used for simultaneously realizing refrigeration and heat supply processes by utilizing the physical state change of the refrigerant of the heat supply and refrigeration unit, wherein the organic working medium of the gas applies work and drives the heat supply and refrigeration unit to operate through a transmission mechanism.
The heating and refrigerating system based on the forward-reverse cycle coupling further comprises a solar heat collector, a heat accumulator, a first water pump, a generator and a second water pump, wherein,
the solar heat collector, the heat accumulator and the first water pump are connected in sequence through pipelines to form a heat collection first loop; the heat accumulator, the generator and the second water pump are connected in sequence through pipelines to form a heat collection second loop;
the heat energy stored in the heat collection first loop is absorbed by the heat collector second loop through the heat accumulator.
The heating and refrigerating system based on the positive and reverse cycle coupling further comprises the organic Rankine unit, a generator, an expander, a condenser and a working medium pump, wherein,
the generator, the expander, the condenser and the working medium pump are sequentially communicated and connected through a pipeline to form an organic Rankine cycle loop, the organic working medium absorbs heat energy of the heat accumulator in the generator, the organic working medium is heated to form superheated steam, and the superheated steam enters the expander to do work.
The heating and refrigerating system based on the forward-reverse cycle coupling as described above, further, the heating and refrigerating unit includes a compressor, a condenser, a throttle valve, an evaporator, a hot water pump, a hot water tank, a cold water pump, and a cold water tank, wherein,
the compressor, the condenser, the throttle valve and the evaporator are connected in sequence through pipelines to form a vapor compression circulation loop;
the condenser, the hot water pump and the hot water tank are connected in sequence through pipelines to form a hot water circulation loop;
the evaporator, the cold water tank and the cold water pump are sequentially connected through pipelines to form a cold water circulation loop;
the steam compression circulation loop is connected with the hot water circulation loop through the condenser;
the vapor compression circulation loop is connected with the cold water circulation loop through the evaporator;
the compressor compresses the vapor-state refrigerant in the first temperature and pressure state to form vapor-state refrigerant in the second temperature and pressure state, and the vapor-state refrigerant in the second temperature and pressure state is condensed in the condenser to release heat to hot water to form liquid-state refrigerant in a third temperature and pressure state, so that the heat supply process of the system is realized; meanwhile, the liquid refrigerant in the third temperature and pressure state from the condenser enters the evaporator after being throttled by the throttle valve to form a gas-liquid mixture, and the gas-liquid mixture in the evaporator absorbs the heat of cold water to become the vapor refrigerant in the first temperature and pressure state, so that the refrigeration process of the system is realized.
According to the heating and refrigerating system based on the forward and reverse cycle coupling, further, two adjacent coupling channels of the generator respectively flow water and organic working media, and the flow direction of the water is opposite to that of the organic working media at least in part of time; two adjacent coupling channels of the condenser respectively flow through the refrigerant and the hot water, and the flow direction of the refrigerant is opposite to that of the hot water at least in part of time; two adjacent coupling channels of the evaporator respectively flow refrigerant and cold water, and the flow direction of the refrigerant is opposite to that of the cold water at least in part of time.
Compared with the prior art, the invention has the beneficial effects that:
1. the expander in the organic Rankine cycle unit is connected with the compressor of the heat supply and refrigeration unit through the direct drive shaft, so that the power transmission efficiency of the system is improved;
2. the expander in the organic Rankine cycle unit directly drives the compressor of the heat supply and refrigeration unit, extra electric energy is not needed to drive the compressor, and the conversion loss between mechanical energy and electric energy is reduced.
3. Mechanical energy output by an expander in the organic Rankine cycle unit in a working mode is transmitted to a compressor of the heat supply and refrigeration unit through the direct drive shaft to drive the heat supply and refrigeration unit, an evaporator in the heat supply and refrigeration unit absorbs heat, the water temperature in the cold water tank is lowered, meanwhile, a condenser in the heat supply and refrigeration unit releases heat, water from the hot water tank is heated, the double functions of refrigeration and heat supply are synchronously achieved, and the energy saving and emission reduction effects of the system are obvious.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a heating and cooling system based on a forward-reverse cycle coupling according to the present invention.
In the figure: 1; a solar heat collector; 2; a heat accumulator; 3; a first water pump; 4; a generator; 5; a second water pump; 6; an expander; 7; a condenser; 8; a working medium pump; 9; directly driving a shaft; 10; a compressor; 11; a condenser; 12; a throttle valve; 13; an evaporator; 14; a cold water pump; 15; a cold water tank; 16; a hot water pump; 17; a hot water tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example (b):
it should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. Furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; 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 in specific cases to those skilled in the art.
Referring to fig. 1, fig. 1 is a schematic diagram of a heating and cooling system based on a forward-reverse cycle coupling according to the present invention. The invention provides a heat supply and refrigeration system based on forward and reverse cycle coupling, which realizes double functions of refrigeration and heat supply by using solar energy to replace electric energy converted from fossil fuel to drive a compressor in a vapor compression cycle.
As shown in fig. 1, the embodiment of the heating and cooling system based on the forward-reverse cycle coupling provided by the invention comprises:
the heat supply and refrigeration system based on positive and negative cycle coupling is composed of a solar heat collection unit, an organic Rankine cycle unit, a heat supply and refrigeration unit and a control unit; the solar heat collection unit is connected with the organic Rankine cycle unit through the generator 4, and the organic Rankine cycle unit is connected with the heat supply and refrigeration unit through the direct-drive shaft 9.
Preferably, the solar heat collection unit comprises a solar heat collector 1, a heat accumulator 2, a first water pump 3, a generator 4 and a second water pump 5, wherein the solar heat collector 1, the heat accumulator 2 and the first water pump 3 are sequentially connected through a pipeline to form a heat collection first loop, the heat accumulator 2, the generator 4 and the second water pump 5 are sequentially connected through a pipeline to form a heat collection second loop, and the heat collection first loop is connected with the heat collection second loop through the heat accumulator 2.
Furthermore, the organic Rankine unit comprises a generator 4, an expander 6, a condenser 7 and a working medium pump 8, and the generator 4, the expander 6, the condenser 7 and the working medium pump 8 are sequentially communicated and connected through a pipeline to form an organic Rankine cycle loop.
Preferably, the heating and refrigerating unit comprises a compressor 10, a condenser 11, a throttle valve 12, an evaporator 13, a hot water pump 16, a hot water tank 17, a cold water pump 14 and a cold water tank 15, wherein the compressor 10, the condenser 11, the throttle valve 12 and the evaporator 13 are sequentially connected through a pipeline to form a vapor compression circulation loop, the condenser 11, the hot water pump 16 and the hot water tank 17 are sequentially connected through a pipeline to form a hot water circulation loop, the evaporator 13, the cold water tank 15 and the cold water pump 14 are sequentially connected through a pipeline to form a cold water circulation loop, and the vapor compression circulation loop is connected with the hot water circulation loop through the condenser 11; the vapor compression circulation circuit is connected to the cold water circulation circuit through the evaporator 13.
Furthermore, adjacent channels of the generator 4 respectively flow water and organic working medium, and the flow direction of the water is generally opposite to that of the organic working medium; the adjacent channels of the condenser 11 are respectively flowed through by refrigerant and hot water, and the refrigerant flow direction is generally opposite to the hot water flow direction; adjacent channels of the evaporator 13 pass refrigerant and cold water, respectively, with the refrigerant flow direction being generally opposite to the cold water flow direction.
Preferably, the solar heat collector 1 absorbs solar energy and converts the solar energy into heat energy, the solar heat collector 1 transmits and stores the converted heat energy in the heat accumulator 2 through a water medium under the action of the first water pump 3, the heat accumulator 2 transmits the heat energy to the generator 4 through the water medium under the action of the second water pump 5, an organic working medium absorbs the heat energy of the heat accumulator 2 in the generator 4 and heats up to form superheated steam, the steam enters the expander 6 to do work, mechanical energy output by the expander 6 doing work is transmitted to the compressor 10 of the heat supply and refrigeration unit through the direct drive shaft 9, the compressor 10 compresses low-temperature and low-pressure refrigerant steam into high-temperature and high-pressure steam, the high-temperature and high-pressure steam in the condenser 11 releases condensation heat to hot water to be condensed into high-pressure liquid, the heat supply function of the system is realized, and the high-pressure refrigerant liquid from the condenser 11 enters the throttle valve 12 after throttling and flows into the high-pressure refrigerant liquid The evaporator 13 forms a gas-liquid mixture, and the gas-liquid mixture in the evaporator 13 absorbs the heat of cold water to become low-pressure refrigerant gas, thereby realizing the refrigeration function of the system.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention accordingly, and not to limit the protection scope of the present invention accordingly. All equivalent changes or modifications made in accordance with the spirit of the present disclosure are intended to be covered by the scope of the present disclosure.
Claims (5)
1. A heating and cooling system based on positive and negative cycle coupling is characterized by comprising:
a solar heat collection unit for absorbing solar energy and converting the solar energy to generate heat energy while storing the heat energy;
the organic Rankine cycle unit is used for heating the liquid organic working medium of the organic Rankine cycle unit to form a gaseous organic working medium by utilizing the heat energy stored by the solar heat collection unit; and the number of the first and second groups,
and the heat supply and refrigeration unit is used for simultaneously realizing refrigeration and heat supply processes by utilizing the physical state change of the refrigerant of the heat supply and refrigeration unit, wherein the organic working medium of the gas applies work and drives the heat supply and refrigeration unit to operate through a transmission mechanism.
2. A heating and cooling system based on forward-reverse cycle coupling according to claim 1, wherein the solar heat collecting unit comprises a solar heat collector, a heat accumulator, a first water pump, a generator and a second water pump, wherein,
the solar heat collector, the heat accumulator and the first water pump are connected in sequence through pipelines to form a heat collection first loop; the heat accumulator, the generator and the second water pump are connected in sequence through pipelines to form a heat collection second loop;
the heat energy stored in the heat collection first loop is absorbed by the heat collector second loop through the heat accumulator.
3. The positive-reverse cycle coupling-based heating and cooling system according to claim 1, wherein the organic Rankine unit includes a generator, an expander, a condenser, and a working fluid pump, wherein,
the generator, the expander, the condenser and the working medium pump are sequentially communicated and connected through a pipeline to form an organic Rankine cycle loop, the organic working medium absorbs heat energy of the heat accumulator in the generator, the organic working medium is heated to form superheated steam, and the superheated steam enters the expander to do work.
4. A heating and cooling system based on forward-reverse cycle coupling according to claim 1, wherein the heating and cooling unit comprises a compressor, a condenser, a throttle valve, an evaporator, a hot water pump, a hot water tank, a cold water pump and a cold water tank, wherein,
the compressor, the condenser, the throttle valve and the evaporator are connected in sequence through pipelines to form a vapor compression circulation loop;
the condenser, the hot water pump and the hot water tank are connected in sequence through pipelines to form a hot water circulation loop;
the evaporator, the cold water tank and the cold water pump are sequentially connected through pipelines to form a cold water circulation loop;
the steam compression circulation loop is connected with the hot water circulation loop through the condenser;
the vapor compression circulation loop is connected with the cold water circulation loop through the evaporator;
the compressor compresses the vapor-state refrigerant in the first temperature and pressure state to form vapor-state refrigerant in the second temperature and pressure state, and the vapor-state refrigerant in the second temperature and pressure state is condensed in the condenser to release heat to hot water to form liquid-state refrigerant in a third temperature and pressure state, so that the heat supply process of the system is realized; meanwhile, the liquid refrigerant in the third temperature and pressure state from the condenser enters the evaporator after being throttled by the throttle valve to form a gas-liquid mixture, and the gas-liquid mixture in the evaporator absorbs the heat of cold water to become the vapor refrigerant in the first temperature and pressure state, so that the refrigeration process of the system is realized.
5. A heating and refrigerating system based on forward-reverse cycle coupling according to any one of claims 1 to 4, wherein two adjacent coupling channels of the generator respectively flow water and organic working medium, and the flow direction of the water is at least partially opposite to that of the organic working medium; two adjacent coupling channels of the condenser respectively flow through the refrigerant and the hot water, and the flow direction of the refrigerant is opposite to that of the hot water at least in part of time; two adjacent coupling channels of the evaporator respectively flow refrigerant and cold water, and the flow direction of the refrigerant is opposite to that of the cold water at least in part of time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111038349.0A CN113720039A (en) | 2021-09-06 | 2021-09-06 | Heating and refrigerating system based on forward and reverse cycle coupling |
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| CN202111038349.0A CN113720039A (en) | 2021-09-06 | 2021-09-06 | Heating and refrigerating system based on forward and reverse cycle coupling |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032912A (en) * | 2013-01-21 | 2013-04-10 | 中国科学院广州能源研究所 | Solar integrated Rankine-Rankine system floor heating device |
| CN204141889U (en) * | 2014-09-29 | 2015-02-04 | 邵振华 | Organic Rankine-absorption-compression formula the refrigeration system of Driven by Solar Energy |
| CN106958963A (en) * | 2017-05-05 | 2017-07-18 | 天津城建大学 | Solar cold co-generation unit based on organic Rankine bottoming cycle and lithium bromide refrigerating |
| CN113048030A (en) * | 2021-04-08 | 2021-06-29 | 湘潭大学 | Solar energy gradient phase-change heat storage and fractional condensation fractional distillation type variable concentration regulation Rankine-heat pump system and operation method |
| CN215983321U (en) * | 2021-09-06 | 2022-03-08 | 中国科学院广州能源研究所 | Heating and refrigerating system based on forward and reverse cycle coupling |
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- 2021-09-06 CN CN202111038349.0A patent/CN113720039A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032912A (en) * | 2013-01-21 | 2013-04-10 | 中国科学院广州能源研究所 | Solar integrated Rankine-Rankine system floor heating device |
| CN204141889U (en) * | 2014-09-29 | 2015-02-04 | 邵振华 | Organic Rankine-absorption-compression formula the refrigeration system of Driven by Solar Energy |
| CN106958963A (en) * | 2017-05-05 | 2017-07-18 | 天津城建大学 | Solar cold co-generation unit based on organic Rankine bottoming cycle and lithium bromide refrigerating |
| CN113048030A (en) * | 2021-04-08 | 2021-06-29 | 湘潭大学 | Solar energy gradient phase-change heat storage and fractional condensation fractional distillation type variable concentration regulation Rankine-heat pump system and operation method |
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