CN110579043A - Heat pump system capable of regulating non-azeotropic refrigerant and system optimization method - Google Patents
Heat pump system capable of regulating non-azeotropic refrigerant and system optimization method Download PDFInfo
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- CN110579043A CN110579043A CN201910709078.3A CN201910709078A CN110579043A CN 110579043 A CN110579043 A CN 110579043A CN 201910709078 A CN201910709078 A CN 201910709078A CN 110579043 A CN110579043 A CN 110579043A
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- 230000001105 regulatory effect Effects 0.000 title claims abstract description 12
- 239000003507 refrigerant Substances 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 title claims abstract description 9
- 238000005457 optimization Methods 0.000 title claims abstract description 8
- 239000007788 liquid Substances 0.000 claims description 133
- 239000012071 phase Substances 0.000 claims description 49
- 238000000926 separation method Methods 0.000 claims description 49
- 229920006395 saturated elastomer Polymers 0.000 claims description 37
- 239000011555 saturated liquid Substances 0.000 claims description 21
- 239000007791 liquid phase Substances 0.000 claims description 12
- 230000001502 supplementing effect Effects 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 2
- 230000001276 controlling effect Effects 0.000 abstract description 6
- 238000012546 transfer Methods 0.000 abstract description 3
- 239000000306 component Substances 0.000 description 19
- 239000012533 medium component Substances 0.000 description 10
- 238000009835 boiling Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001932 seasonal effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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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
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
-
- 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
- F25B41/31—Expansion valves
-
- 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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention relates to the technical field of energy control, in particular to a heat pump system capable of regulating and controlling a non-azeotropic refrigerant and a system optimization method. The invention utilizes the non-azeotropic working medium combined with the component regulation and control device to improve the heat transfer performance of the working medium and reduce the average heat exchange temperature difference of the heat pump system, so that the working medium temperature and the heat source temperature have higher matching degree, thereby reducing the systemAnd (4) loss.
Description
Technical Field
The invention relates to the technical field of energy control, in particular to a heat pump system capable of regulating and controlling a non-azeotropic refrigerant and a system optimization method.
Background
Heat pump systems are becoming mature day by day, and conventional heat pump systems are composed of four parts: compressor, condenser, expansion valve, evaporimeter. In the four parts, the heat supplied to the room is the heat released by the high-temperature and high-pressure working medium in the condenser and is influenced by the evaporation pressure at the evaporator side. In the traditional heat pump system adopting single working medium, the evaporation pressure is reduced when the external environment temperature is reduced, so that the heat supplied to the indoor space is sharply attenuated, and the indoor heat load and the heat pump load have only a unique balance point at different environment temperatures, so that different balance points at different environment temperatures cannot be met, thereby not only causing energy waste, but also being not beneficial to the improvement of the human body comfort.
Therefore, it is the research direction of those skilled in the art how to maintain the heat balance of the indoor environment at different ambient temperatures.
disclosure of Invention
The invention overcomes at least one defect in the prior art and provides a heat pump system capable of regulating and controlling non-azeotropic refrigerant and a system optimization method, which utilize a non-azeotropic working medium combined with a component regulating and controlling device to improve the heat transfer performance of the working medium and reduce the average heat exchange temperature difference of the heat pump system, so that the working medium temperature and the heat source temperature have higher matching degree, thereby reducing the systemAnd (4) loss.
In order to solve the technical problems, the invention adopts the technical scheme that: the heat pump system capable of regulating and controlling the non-azeotropic refrigerant comprises a compressor, a liquid separating condenser, an expansion valve and an evaporator which are sequentially connected to form a loop, wherein a gas-liquid separation system is arranged between the liquid separating condenser and the evaporator as well as between the liquid separating condenser and the compressor.
In one embodiment, the gas-liquid separation system is provided with a liquid separation branch, the liquid separation branch comprises a gas-liquid separator, a passage is arranged between the gas-liquid separator and the liquid separation condenser, a passage is arranged between a saturated liquid phase working medium outlet of the gas-liquid separator and the evaporator, and a passage is arranged between a saturated gas phase working medium outlet of the gas-liquid separator and the compressor.
The compressor, divide liquid condenser, the expansion valve, the evaporimeter connects gradually and forms the route, divide liquid branch intercommunication branch liquid condenser and evaporimeter of component regulation and control system, the gas-liquid separator of branch liquid carries out gas-liquid separation to the non-azeotropic working medium in the branch liquid condenser, utilize gas-liquid separation device to make the system can change the component of working medium in the heat exchanger along with the change of external environment temperature and load, increase the adaptability of heat pump system to the environment, can also reduce the loss of heat pump system available energy, reduce the energy consumption, improve energy utilization efficiency.
In one embodiment, the passage between the gas-liquid separator and the liquid separation condenser is provided with an expansion valve.
In one embodiment, the passage between the saturated liquid phase working medium outlet of the gas-liquid separator and the evaporator is provided with an expansion valve.
Preferably, three groups of liquid separating branches are arranged, the heat pump system is further provided with a gas mixing device, a passage is arranged between a saturated gas-phase working medium outlet of a gas-liquid separator of the three groups of liquid separating branches and the gas mixing device, and a passage is arranged between the gas mixing device and the compressor.
Preferably, the gas mixing device is a gas tank.
In one embodiment, the compressor is a compressor with air-supplementing and enthalpy-increasing functions, and a low-pressure stage air suction port and an intermediate air supplement port are arranged.
Preferably, divide liquid condenser including the header, the header is equipped with and divides liquid baffle and divide the liquid export, divides liquid exit linkage regulating pipe, and the branch road is divided in the connecting of regulating pipe.
The heat pump system optimization method comprises the following steps:
s1: a gas-liquid separation system is arranged between a liquid separation condenser and an evaporator in the heat pump system;
S2: the saturated liquid phase working medium in the liquid separation condenser enters a gas-liquid separation system, and the saturated gas phase working medium in the liquid separation condenser is continuously condensed in the liquid separation condenser;
S3: after the saturated liquid phase working medium is expanded and depressurized, part of the working medium is gasified into a saturated gas phase working medium, and the saturated gas phase working medium and the saturated liquid phase working medium enter a gas-liquid separator;
s4: in the gas-liquid separator, the saturated gas-phase working medium is separated from the saturated liquid-phase working medium, the saturated gas-phase working medium flows to the middle gas supplementing port of the compressor, and the saturated liquid-phase working medium flows to the evaporator.
Compared with the prior art, the invention has the following characteristics:
The scheme of the invention combines a component regulation and control system by using the non-azeotropic working medium and uses the gas-liquid separation device to ensure that the system can change the components of the working medium in the heat exchanger along with the change of the external environment temperature and load. The heat transfer performance of the working medium is improved and the average heat exchange temperature difference of the heat pump system is reduced by changing the proportion of the non-azeotropic working medium components, so that the working medium temperature and the heat source temperature have higher matching degree, and the heat pump system is reducedAnd (4) loss. The adaptability of the heat pump system to the environment is improved, the loss of available energy of the heat pump system is reduced, the energy consumption is reduced, the energy utilization efficiency is improved, the economical efficiency and the seasonal energy efficiency ratio of the operation of the heat pump system are improved, and the energy-saving development of the heat pump system is promoted.
drawings
fig. 1 is a schematic diagram of the system as a whole in the embodiment of the present invention.
Fig. 2 is an overall schematic diagram of the system in the embodiment of the invention.
Fig. 3 is a schematic diagram of a liquid separation condenser in an embodiment of the invention.
FIG. 4 is a schematic view of the structure of the adjusting pipe and the header in the embodiment of the present invention.
Detailed Description
The drawings are for illustration purposes only and are not to be construed as limiting the invention; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the invention.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Example 1:
As shown in fig. 1, the present invention provides a heat pump system capable of regulating and controlling a non-azeotropic refrigerant, wherein a compressor 101, a liquid separation condenser 102, an expansion valve 103, and an evaporator 104 are sequentially connected to form a loop, a gas-liquid separation system is arranged between the liquid separation condenser 102 and the evaporator 104 and the compressor 101, the gas-liquid separation system is provided with a liquid separation branch, the liquid separation branch comprises a gas-liquid separator 106, a part of working medium components in the liquid separation condenser 102 enter the gas-liquid separator 106, and by regulating the components and the flow rate of a saturated liquid phase working medium entering the liquid separation branch, the components of the remaining working medium in the liquid separation condenser 102 are changed, the physical parameters thereof are changed, the dryness of the working medium is improved, and finally, the.
A passage with an expansion valve 105 is arranged between the gas-liquid separator 106 and the liquid separating condenser 102, the gas-liquid separator 106 performs gas-liquid separation on working medium components, and the gas-liquid separator 106 is provided with two outlets, namely a saturated gas-phase working medium outlet and a saturated liquid-phase working medium outlet.
A passage with an expansion valve 107 is arranged between the saturated liquid phase working medium outlet of the gas-liquid separator 106 and the evaporator 104, a passage is arranged between the saturated gas phase working medium outlet of the gas-liquid separator 106 and the compressor 101, and the saturated gas phase working medium enters the compressor 101.
in this embodiment, the compressor 101 has a low-pressure air inlet and a middle air supplement port, and has the functions of supplementing air and increasing enthalpy.
in the liquid separating condenser 102, the overheated working medium which just enters the liquid separating condenser 102 is firstly cooled to the corresponding saturation temperature, and then begins to be condensed into a saturated liquid phase working medium, the overheated working medium is firstly condensed into a liquid phase working medium at the initial end of the liquid separating condenser 102 because the boiling point of the high boiling point working medium is higher, the overheated working medium is firstly condensed into a liquid phase because the boiling point of the low boiling point working medium is low, the condensation amount in the initial end of the condenser is small, and the component proportion of the high boiling point working medium in the liquid phase working medium which is firstly condensed out. Along with the advance of the condensation process, the condensation amount of the low boiling point working medium is gradually increased, and the specific gravity of the low boiling point components occupied at the moment is also gradually increased. Therefore, the positions of the liquid separating outlets are reasonably arranged, the saturated liquid-phase working medium which completes heat exchange is quantitatively extracted, the components of the residual part of the working medium in the liquid separating condenser 102 can be changed, the flow of the extracted liquid is adjusted by adjusting the opening degree of the expansion valve of each liquid separating outlet, and the purpose of adjusting the components is finally realized.
The heat pump system optimization method comprises the following steps:
S1: a gas-liquid separation system is arranged between a liquid separation condenser and an evaporator in the heat pump system;
s2: the saturated liquid phase working medium in the liquid separation condenser enters a gas-liquid separation system, and the saturated gas phase working medium in the liquid separation condenser is continuously condensed in the liquid separation condenser;
S3: after the saturated liquid phase working medium is expanded and depressurized, part of the working medium is gasified into a saturated gas phase working medium, and the saturated gas phase working medium and the saturated liquid phase working medium enter a gas-liquid separator;
S4: in the gas-liquid separator, the saturated gas-phase working medium is separated from the saturated liquid-phase working medium, the saturated gas-phase working medium flows to the middle gas supplementing port of the compressor, and the saturated liquid-phase working medium flows to the evaporator, so that the circulation of the heat pump system is realized.
Example 2:
as shown in fig. 2, the heat pump system of the present invention provides a controllable non-azeotropic refrigerant, wherein a compressor 101, a liquid separating condenser 102, an expansion valve, and an evaporator 104 are sequentially connected to form a loop, the heat pump system includes a component control system, the component control system is provided with three liquid separating branches, each liquid separating branch includes a gas-liquid separator 106, a part of working medium components in the liquid separating condenser 102 enters the gas-liquid separator 106, and the components and flow rate of a saturated liquid phase working medium entering the liquid separating branch are adjusted, such that the components of the remaining working medium in the liquid separating condenser 102 are changed, physical parameters thereof are changed, dryness of the working medium is improved, and finally, heat exchange capacity of the liquid separating condenser 102 is effectively improved.
as shown in fig. 3 and fig. 4, the liquid separating condenser 102 includes a header 11, the header 11 is provided with a liquid separating partition plate 12, the header 11 is provided with an outlet 14 and an inlet 15 of working medium components, and three liquid separating outlets are also provided, each liquid separating outlet is connected with an adjusting pipe 13, the flow of saturated liquid phase working medium components of the liquid separating outlet is adjusted by adjusting the pipe diameter of the adjusting pipe 13, each adjusting pipe 13 is connected with a group of liquid separating branches, the three group of liquid separating branches divide the working medium components in the liquid separating condenser 102 in a coordinated manner, so as to change the residual working medium components in the condenser and improve the dryness of the working medium.
A passage with an expansion valve 105 is arranged between the gas-liquid separator 106 and the liquid separating condenser 102, the gas-liquid separator 106 performs gas-liquid separation on working medium components, and the gas-liquid separator 106 comprises two outlets, namely a saturated gas-phase working medium outlet and a saturated liquid-phase working medium outlet.
A passage with an expansion valve 107 is arranged between the saturated liquid phase working medium outlet of the gas-liquid separator 106 and the evaporator 104, a passage is arranged between the gas-liquid separator 106 in the three-component liquid branch and the gas mixing device 114, or alternatively, one gas mixing device 114 can be respectively arranged in each component liquid branch, and the three-component liquid branch corresponds to the three gas mixing devices 114.
The gas-liquid separator 106 separates the working medium components to generate a saturated liquid phase working medium and a saturated gas phase working medium, the saturated liquid phase working medium and the saturated gas phase working medium respectively enter the evaporator 104 and the gas mixing device 114, a passage is arranged between the gas mixing device 114 and the compressor 101, and the saturated gas phase working medium is buffered by the gas mixing device 114 and enters the compressor 101.
The gas mixing device 114 is a gas tank, and the gas tank mixes the saturated gas-phase working medium separated by the gas-liquid separator 106 and introduces the saturated gas-phase working medium into the compressor 101.
In this embodiment, the compressor 101 has a low-pressure air inlet and a middle air supplement port, and has the functions of supplementing air and increasing enthalpy.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. 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. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. The heat pump system capable of regulating non-azeotropic refrigerant includes compressor, liquid separating condenser, expansion valve and evaporator connected successively to form loop,
The air-liquid separator is characterized in that a gas-liquid separation system is arranged between the liquid separating condenser and the evaporator as well as between the liquid separating condenser and the compressor.
2. The heat pump system of claim 1, wherein the gas-liquid separation system comprises a liquid separation branch comprising a gas-liquid separator, a passage is provided between the gas-liquid separator and the liquid separation condenser, a passage is provided between a saturated liquid phase working medium outlet of the gas-liquid separator and the evaporator, and a passage is provided between a saturated gas phase working medium outlet of the gas-liquid separator and the compressor.
3. the system of claim 2, wherein the path between the vapor-liquid separator and the liquid separation condenser is provided with an expansion valve.
4. The adjustable zeotropic refrigerant heat pump system according to claim 3, wherein the path between the saturated liquid phase working medium outlet of the gas-liquid separator and the evaporator is provided with an expansion valve.
5. The heat pump system of claim 4, wherein the liquid separating branch comprises three groups, the heat pump system further comprises a gas mixing device, a passage is provided between the saturated gas phase working medium outlet of the gas-liquid separator of the three groups of liquid separating branches and the gas mixing device, and a passage is provided between the gas mixing device and the compressor.
6. The variable control zeotropic refrigerant heat pump system of claim 5, wherein the gas mixing device is a gas tank.
7. The system of claim 1, wherein the compressor is a gas-supplementing enthalpy-increasing compressor having a low pressure stage suction port and an intermediate gas-supplementing port.
8. the system of any one of claims 2 to 6, wherein the liquid separation condenser comprises a header, the header is provided with a liquid separation partition and a liquid separation outlet, the liquid separation outlet is connected with an adjusting pipe, and the adjusting pipe is connected with a liquid separation branch.
9. The heat pump system optimization method is characterized by comprising the following steps:
S1: a gas-liquid separation system is arranged between a liquid separation condenser and an evaporator in the heat pump system;
S2: the saturated liquid phase working medium in the liquid separation condenser enters a gas-liquid separation system, and the saturated gas phase working medium in the liquid separation condenser is continuously condensed in the liquid separation condenser;
s3: after the saturated liquid phase working medium is expanded and depressurized, part of the working medium is gasified into a saturated gas phase working medium, and the saturated gas phase working medium and the saturated liquid phase working medium enter a gas-liquid separator;
s4: in the gas-liquid separator, the saturated gas-phase working medium is separated from the saturated liquid-phase working medium, the saturated gas-phase working medium flows to the middle gas supplementing port of the compressor, and the saturated liquid-phase working medium flows to the evaporator, so that the circulation of the heat pump system is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201910709078.3A CN110579043A (en) | 2019-08-01 | 2019-08-01 | Heat pump system capable of regulating non-azeotropic refrigerant and system optimization method |
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| CN201910709078.3A CN110579043A (en) | 2019-08-01 | 2019-08-01 | Heat pump system capable of regulating non-azeotropic refrigerant and system optimization method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111706412A (en) * | 2020-06-10 | 2020-09-25 | 广东工业大学 | ORC system component regulation and control system and regulation and control method |
| CN111947302A (en) * | 2020-08-28 | 2020-11-17 | 中原工学院 | Concentration-variable directly-heated heat pump water heater with flash evaporator and working method thereof |
| CN111964261A (en) * | 2020-08-28 | 2020-11-20 | 中原工学院 | Concentration-adjustable wide-temperature-area directly-heated heat pump water heater and working method thereof |
| CN113531696A (en) * | 2020-04-13 | 2021-10-22 | 青岛海尔空调电子有限公司 | Air-cooled heat pump air conditioning system capable of efficiently heating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111706412A (en) * | 2020-06-10 | 2020-09-25 | 广东工业大学 | ORC system component regulation and control system and regulation and control method |
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| CN111964261A (en) * | 2020-08-28 | 2020-11-20 | 中原工学院 | Concentration-adjustable wide-temperature-area directly-heated heat pump water heater and working method thereof |
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