CN118189425A - Air supplementing and enthalpy increasing energy storage thermal management system for direct evaporation of intermediate refrigerant - Google Patents
Air supplementing and enthalpy increasing energy storage thermal management system for direct evaporation of intermediate refrigerant Download PDFInfo
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- CN118189425A CN118189425A CN202211605198.7A CN202211605198A CN118189425A CN 118189425 A CN118189425 A CN 118189425A CN 202211605198 A CN202211605198 A CN 202211605198A CN 118189425 A CN118189425 A CN 118189425A
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
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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
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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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
- F25B41/40—Fluid line arrangements
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/003—Filters
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- 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 provides a gas supplementing and enthalpy increasing energy storage thermal management system for directly evaporating an intermediate refrigerant, which comprises the following components: a compressor; a heat exchange device configured to be connected between the compressor and the economizer; and the economizer is configured to divide the refrigerant entering the evaporator into two parts, wherein the first part of refrigerant evaporates to take away the heat of the second part of refrigerant and then directly returns to the compressor, and the second part of refrigerant is matched with the heat exchange device to exchange heat and then returns to the compressor.
Description
Technical Field
The invention relates to the technical field of heat management, in particular to a gas supplementing and enthalpy increasing energy storage heat management system for directly evaporating an intermediate refrigerant.
Background
Current energy storage thermal management systems generally use heat pumps, cold water, or direct-cooled air conditioners (refrigerants exchange heat directly in battery cooling plates) to cool or heat. Their refrigeration or heating schematic is shown in fig. 1, in which a high-temperature and high-pressure refrigerant is condensed in a condenser to reduce the internal energy after leaving a compressor, and then the condensed refrigerant is evaporated in an evaporator to absorb heat from a cooling circuit, thereby achieving refrigeration of a coolant in the cooling circuit. The heating process is the reverse of the refrigeration process, i.e. the evaporator is followed by the condenser. However, there is still room for further improvement in the efficiency of such refrigeration or heat pump cycle.
Disclosure of Invention
The invention aims to provide a gas supplementing and enthalpy increasing energy storage heat management system for directly evaporating an intermediate refrigerant, so as to solve the problem of low energy storage heat management efficiency in the prior art.
In order to solve the technical problems, the invention provides a gas supplementing and enthalpy increasing energy storage heat management system for directly evaporating an intermediate refrigerant, which comprises the following components:
a compressor;
A heat exchange device configured to be connected between the compressor and the economizer;
and the economizer is configured to divide the refrigerant entering the evaporator into two parts, wherein the first part of refrigerant evaporates to take away the heat of the second part of refrigerant and returns to the compressor, and the second part of refrigerant exchanges heat with the heat exchange device and returns to the compressor.
Optionally, in the air supplementing and enthalpy increasing energy storage thermal management system in which the intermediate refrigerant is directly evaporated, the economizer comprises two output ends, and the compressor comprises two input ends;
the first input of the compressor is directly connected to the first output of the economizer.
Optionally, in the air supplementing and enthalpy increasing energy storage heat management system in which the intermediate refrigerant is directly evaporated, the heat exchange device comprises a first heat exchanger, and the first heat exchanger is configured to be connected between an output end of the compressor and an input end of the economizer;
The heat exchange device also includes a second heat exchanger configured to be connected between a second input of the compressor and a second output of the economizer.
Optionally, in the air-supplementing and enthalpy-increasing energy-storing heat management system for directly evaporating the intermediate refrigerant, the air-supplementing and enthalpy-increasing energy-storing heat management system for directly evaporating the intermediate refrigerant further comprises a first throttling device;
the economizer includes an input, and the first throttling device is connected between the output of the first heat exchanger and the input of the economizer; or alternatively
The economizer comprises two inputs, and the first throttling means is connected between the output of the first heat exchanger and the first input of the economizer, and the output of the first heat exchanger is directly connected to the second input of the economizer.
Optionally, in the air supplementing and enthalpy increasing energy storage thermal management system with direct evaporation of the intermediate refrigerant, the system further includes:
a second throttling device configured to be connected between an input of the second heat exchanger and a second output of the economizer;
A filter configured to be connected between the second output of the economizer and the input of the second throttling device.
Optionally, in the air supplementing and enthalpy increasing energy storage thermal management system in which the intermediate refrigerant is directly evaporated, the first throttling device is a first electronic expansion valve, and the second throttling device is a second electronic expansion valve;
Under the refrigeration working condition, the first heat exchanger is a condenser, and the second heat exchanger is an evaporator; and under the heating working condition, the second heat exchanger is a condenser, and the first heat exchanger is an evaporator.
Optionally, in the air supplementing and enthalpy increasing energy storage thermal management system with the direct evaporation of the intermediate refrigerant,
Under the refrigeration working condition, all or part of the refrigerant from the condenser enters the economizer through the first electronic expansion valve, the first part of refrigerant in the economizer is evaporated to cool the second part of refrigerant which is not evaporated, the second part of refrigerant which is not evaporated enters the evaporator through the second electronic expansion valve of the main path, the refrigerant is evaporated in the evaporator and finally returns to the air return side of the compressor, and the first part of refrigerant evaporated in the economizer enters the air supply port of the compressor through the auxiliary path as gas;
the air supplementing port of the compressor is a first input end of the compressor, and the air returning side of the compressor is a second input end of the compressor;
and determining the flow rate of the auxiliary path refrigerant according to the selected type of the economizer and the control parameter of the first throttling device.
Optionally, in the air supplementing and enthalpy increasing energy storage thermal management system for directly evaporating the intermediate refrigerant, the type of the economizer is determined according to the following method:
According to the calculated air supplementing pressure under the rated working condition and the refrigerant parameters from the condenser, selecting the type of the economizer;
wherein the air supplementing pressure is as follows:
where Pd is the discharge pressure and Ps is the suction pressure.
Optionally, in the air supplementing and enthalpy increasing energy storage thermal management system in which the intermediate refrigerant is directly evaporated, the control parameters of the first throttling device include: the superheat degree of the inlet of the auxiliary way of the compressor is 2-10 ℃ by adjusting the first throttling device.
The invention also provides a system for the heat management of the air supplementing and enthalpy increasing energy storage by directly evaporating the intermediate refrigerant, which comprises the following components:
a compressor;
A first heat exchange device and a second heat exchange device, which are respectively arranged between the compressor and the first electronic expansion valve and between the compressor and the second electronic expansion valve;
a first electronic expansion valve and a second electronic expansion valve respectively arranged between the first heat exchange device and the economizer and in the main path; and
The economizer, refrigerant in it is divided into main road and auxiliary road, wherein auxiliary road refrigerant evaporates in the economizer and takes away the partial heat of main road refrigerant and directly gets back to the compressor, and main road refrigerant gets back to the compressor after passing second electronic expansion valve and second heat transfer device.
The present inventors have found through studies that the existing refrigeration or heat pump cycle as shown in fig. 1 has the following disadvantages:
1) The existing system in the field of energy storage heat management has no intermediate cooling device and has lower efficiency;
2) The stability is poor, and the energy storage thermal management field characteristic is that the pressure ratio is low, and the compressor that uses at present all has the operation characteristic curve, has certain restriction to the pressure ratio low excessively, and when the pressure ratio was low excessively, conventional system can only avoid through the mode of reducing to the frequency or improving the super-heated degree of breathing in, influences system stability, and the temperature difference is undulant big, and efficiency further reduces.
In the air supplementing and enthalpy increasing energy storage heat management system for directly evaporating the intermediate refrigerant, the refrigerant entering the economizer is divided into two parts, wherein the first part of refrigerant is evaporated to take away the heat of the second part of refrigerant and then directly returns to the compressor, and the second part of refrigerant is matched with the heat exchange device to exchange heat and then returns to the compressor, so that the intermediate heat exchange of part of refrigerant is realized, the energy efficiency of the energy storage heat management system is improved, in addition, the intermediate heat exchange improves the pressure ratio of the compressor, and the running stability of the system is further improved.
After the intermediate cooling device is added, the supercooling degree of the refrigerant is increased, the evaporating section is increased by delta h, the delta h is related to the type selection of the economizer and the opening degree of the first throttling device, and the quantity of the refrigerant can be increased by about 10 percent, and the energy efficiency is increased as the flow capacity of the refrigerant is increased. After the intermediate cooling is added, the high pressure can be increased, the pressure ratio is increased, the operation of the compressor is more stable, and the method is more suitable for the characteristic of small pressure ratio in the field of energy storage heat management.
Drawings
FIG. 1 is a schematic diagram of a prior art stored energy thermal management system;
FIG. 2 is a schematic diagram of a system for heat management of energy storage with enhanced vapor content by direct evaporation of an intermediate refrigerant according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a system for thermal management of vapor-augmented enthalpy energy storage by direct evaporation of an intermediate refrigerant in accordance with a second embodiment of the present invention;
FIG. 4 is a schematic diagram of the vapor compression of the heat management system for vapor augmented and energy storage with direct evaporation of the intermediate refrigerant according to the first embodiment of the present invention;
Fig. 5 is a schematic diagram of the pressure-enthalpy diagram of the air-supplementing and enthalpy-increasing energy-storing heat management system for direct evaporation of the intermediate refrigerant according to the second embodiment of the invention.
Detailed Description
The invention is further elucidated below in connection with the embodiments with reference to the drawings.
It should be noted that the components in the figures may be shown exaggerated for illustrative purposes and are not necessarily to scale. In the drawings, identical or functionally identical components are provided with the same reference numerals.
In the present invention, unless specifically indicated otherwise, "disposed on …", "disposed over …" and "disposed over …" do not preclude the presence of an intermediate therebetween. Furthermore, "disposed on or above" … merely indicates the relative positional relationship between the two components, but may also be converted to "disposed under or below" …, and vice versa, under certain circumstances, such as after reversing the product direction.
In the present invention, the embodiments are merely intended to illustrate the scheme of the present invention, and should not be construed as limiting.
In the present invention, the adjectives "a" and "an" do not exclude a scenario of a plurality of elements, unless specifically indicated.
It should also be noted herein that in embodiments of the present application, only a portion of the components or assemblies may be shown for clarity and simplicity, but those of ordinary skill in the art will appreciate that the components or assemblies may be added as needed for a particular scenario under the teachings of the present application. In addition, features of different embodiments of the application may be combined with each other, unless otherwise specified. For example, a feature of the second embodiment may be substituted for a corresponding feature of the first embodiment, or may have the same or similar function, and the resulting embodiment may fall within the scope of disclosure or description of the application.
It should also be noted herein that, within the scope of the present invention, the terms "identical", "equal" and the like do not mean that the two values are absolutely equal, but rather allow for some reasonable error, that is, the terms also encompass "substantially identical", "substantially equal". By analogy, in the present invention, the term "perpendicular", "parallel" and the like in the table direction also covers the meaning of "substantially perpendicular", "substantially parallel".
The numbers of the steps of the respective methods of the present invention are not limited to the order of execution of the steps of the methods. The method steps may be performed in a different order unless otherwise indicated.
The air supplementing and enthalpy increasing energy storage heat management system for directly evaporating the intermediate refrigerant provided by the invention is further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
The invention aims to provide a gas supplementing and enthalpy increasing energy storage heat management system for directly evaporating an intermediate refrigerant, so as to solve the problem of low energy storage heat management efficiency in the prior art.
In order to achieve the above purpose, the present invention provides a system for heat management of energy storage by supplementing air and increasing enthalpy by directly evaporating an intermediate refrigerant, comprising: a compressor; a heat exchange device configured to be connected between the compressor and the economizer; and the economizer is configured to divide the refrigerant entering the evaporator into two parts, wherein the first part of refrigerant evaporates to take away the heat of the second part of refrigerant and then directly returns to the compressor, and the second part of refrigerant is matched with the heat exchange device to exchange heat and then returns to the compressor.
Fig. 2-3 provide a first embodiment of the present invention, fig. 2 shows a schematic structural diagram of a gas-supplementing enthalpy-increasing energy storage thermal management system for direct evaporation of an intermediate refrigerant, as shown in fig. 2, including: a compressor 6; a heat exchange device configured to be connected between the compressor and the economizer; the economizer 7 is configured to divide the refrigerant entering the evaporator into two parts, wherein the first part of refrigerant evaporates to take away the heat of the second part of refrigerant and then directly returns to the compressor, and the second part of refrigerant is matched with the heat exchange device to exchange heat and then returns to the compressor; wherein the economizer has one input and two outputs and the compressor has one output and two inputs.
Specifically, in the air supplementing and enthalpy increasing energy storage heat management system for directly evaporating the intermediate refrigerant, the economizer comprises two output ends, the compressor comprises two input ends, and the first input end of the compressor is directly connected with the first output end of the economizer.
The heat exchange device comprises a first heat exchanger 1 configured to be connected between an output of a compressor and an input of an economizer; the heat exchange device further comprises a second heat exchanger 2 configured to be connected between a second input of the compressor and a second output of the economizer, the first heat exchanger being a condenser and the second heat exchanger being an evaporator.
Further, the economizer comprises an input end, and the air supplementing and enthalpy increasing energy storage thermal management system for directly evaporating the intermediate refrigerant further comprises: a first throttling means 3 configured to be connected between the output of the first heat exchanger and the input of the economizer;
A second throttling means 4 configured to be connected between the input of the second heat exchanger and the second output of the economizer; a filter 5 configured to be connected between a second output of the economizer and an input of a second throttling device, said first and second throttling devices comprising electronic expansion valves.
Specifically, in the air supplementing and enthalpy increasing energy storage heat management system in which the intermediate refrigerant is directly evaporated, a first input end of the compressor is connected with a first output end of the economizer.
Further, in the air supplementing and enthalpy increasing energy storage thermal management system for directly evaporating the intermediate refrigerant, the refrigerant coming out of the condenser enters the economizer through the first electronic expansion valve, the refrigerant is split in the economizer to form two paths (a first part of refrigerant and a second part of refrigerant or called an auxiliary path and a main path), the first part of refrigerant in the economizer is evaporated to cool the second part of refrigerant which is not evaporated, the second part of refrigerant which is not evaporated enters the evaporator through the second electronic expansion valve of the main path, is evaporated in the evaporator and finally returns to the air returning side of the compressor, and the first part of refrigerant evaporated in the economizer enters the air supplementing port of the compressor through the auxiliary path as gas; the air supplementing port of the compressor is a first input end of the compressor, and the air returning side of the compressor is a second input end of the compressor.
Further, in the air supplementing and enthalpy increasing energy storage heat management system for directly evaporating the intermediate refrigerant, the flow rate of the auxiliary refrigerant is determined according to the selection of the economizer and the control parameters of the first throttling device. In the air supplementing and enthalpy increasing energy storage heat management system for directly evaporating the intermediate refrigerant, the type selection of the economizer is determined according to the following method:
According to the calculated air supplementing pressure under the rated working condition and the refrigerant parameters from the condenser, selecting the type of the economizer;
wherein the air supplementing pressure is as follows:
where Pd is the discharge pressure and Ps is the suction pressure.
Specifically, in the air-supplementing enthalpy-increasing energy storage thermal management system in which the intermediate refrigerant is directly evaporated, the control parameters of the first throttling device include: the superheat degree of the inlet of the auxiliary way of the compressor is 2-10 ℃ by adjusting the first throttling device.
As shown in fig. 3, after the intermediate cooling is added, the supercooling degree of the refrigerant is increased, the Δh is increased in the evaporation section, the flow capacity of the same refrigerant is increased, and the energy efficiency is increased by about 5%. After the intermediate cooling is added, the high pressure can be increased, the pressure ratio is increased, the operation of the compressor is more stable, and the method is more suitable for the characteristic of small pressure ratio in the field of energy storage heat management. After the intermediate cooling is added, the supercooling degree of the refrigerant is increased, the Δh is increased in the evaporation section, the flow capacity of the refrigerant is increased, and the energy efficiency is increased by about 5%. After the intermediate cooling is added, the high pressure can be increased, the pressure ratio is increased, the operation of the compressor is more stable, and the method is more suitable for the characteristic of small pressure ratio in the field of energy storage heat management.
Fig. 4-5 provide a second embodiment of the present invention, and fig. 4 shows a schematic structural diagram of a gas-supplementing enthalpy-increasing energy storage thermal management system for direct evaporation of an intermediate refrigerant, as shown in fig. 4, including: a compressor 6; a heat exchange device configured to be connected between the compressor and the economizer; the economizer 7 is configured to divide the refrigerant entering the evaporator into two parts, wherein the first part of refrigerant evaporates to take away the heat of the second part of refrigerant and then directly returns to the compressor, and the second part of refrigerant is matched with the heat exchange device to exchange heat and then returns to the compressor; wherein the economizer has one input and two outputs and the compressor has one output and two inputs.
The difference from the previous embodiment is that the economizer comprises two inputs, the first throttling means being connected between the output of the first heat exchanger and the first input of the economizer, and the output of the first heat exchanger being directly connected to the second input of the economizer. Under the refrigeration working condition, the refrigerant from the condenser is directly split into two paths (a first part of refrigerant and a second part of refrigerant, or called an auxiliary path and a main path), the first part of refrigerant enters the economizer through the first electronic expansion valve, the second part of refrigerant directly enters the economizer through the other path, the first part of refrigerant is evaporated in the economizer to cool the second part of refrigerant which is not evaporated, the second part of refrigerant which is not evaporated enters the evaporator through the second electronic expansion valve of the main path, is evaporated in the evaporator and finally returns to the air return side of the compressor, and the first part of refrigerant evaporated in the economizer enters the air supplementing port of the compressor through the auxiliary path.
The first embodiment cannot control the supercooling degree of the main path refrigerant, and the refrigerant liquid (main path) from the economizer is saturated, but the economizer has a simple structure; the embodiment can control the supercooling degree of the main path refrigerant, and control the supercooling degree of the refrigerant liquid (main path) from the economizer by controlling the opening degree of the first electronic expansion valve, so that the efficiency is further improved, and the economizer has a complex structure.
As shown in fig. 5, the economizer option can be reduced by about 5% by direct evaporation of the intermediate refrigerant; after the intermediate cooling is added, the supercooling degree of the refrigerant is increased, the evaporating section is increased by delta h, the delta h is related to the type selection of the economizer and the opening degree of the first electronic expansion valve, and the quantity of the refrigerant can be increased by about 10 percent, and the energy efficiency is increased as the flow capacity of the refrigerant is increased. After the intermediate cooling is added, the high pressure can be increased, the pressure ratio is increased, the operation of the compressor is more stable, and the method is more suitable for the characteristic of small pressure ratio in the field of energy storage heat management.
In the air supplementing and enthalpy increasing energy storage heat management system for directly evaporating the intermediate refrigerant, the refrigerant entering the economizer is divided into two parts, wherein the first part of refrigerant is evaporated to take away the heat of the second part of refrigerant and then directly returns to the compressor, and the second part of refrigerant is matched with the heat exchange device to exchange heat and then returns to the compressor, so that the intermediate heat exchange of part of refrigerant is realized, the energy efficiency of the energy storage heat management system is improved, in addition, the intermediate heat exchange improves the pressure ratio of the compressor, and the running stability of the system is further improved.
In summary, the above embodiments describe in detail different configurations of the air-supplementing and enthalpy-increasing energy storage thermal management system for direct evaporation of intermediate refrigerant, and of course, the present invention includes, but is not limited to, the configurations listed in the above embodiments, and any contents of transformation based on the configurations provided in the above embodiments fall within the scope of protection of the present invention. One skilled in the art can recognize that the above embodiments are illustrative.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the system disclosed in the embodiment, the description is relatively simple because of corresponding to the method disclosed in the embodiment, and the relevant points refer to the description of the method section.
The above description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, and any alterations and modifications made by those skilled in the art based on the above disclosure shall fall within the scope of the appended claims.
Claims (10)
1. The utility model provides a middle refrigerant direct evaporation's air supplementing increases enthalpy energy storage heat management system which characterized in that includes:
a compressor;
A heat exchange device configured to be connected between the compressor and the economizer; and
And an economizer configured such that the refrigerant introduced therein is divided into two parts, wherein the first part of the refrigerant evaporates to take away at least part of heat of the second part of the refrigerant and returns to the compressor, and the second part of the refrigerant exchanges heat with the heat exchange device and returns to the compressor.
2. The system of claim 1, wherein the economizer includes two outputs and the compressor includes two inputs; and
The first input of the compressor is directly connected to the first output of the economizer.
3. The supplemental enthalpy energy storage thermal management system for direct evaporation of an intermediate refrigerant according to claim 2, wherein the heat exchange device includes a first heat exchanger configured to be connected between an output of the compressor and an input of the economizer;
The heat exchange device also includes a second heat exchanger configured to be connected between a second input of the compressor and a second output of the economizer.
4. The system for thermal energy storage management of supplemental vapor enthalpy by direct evaporation of an intermediate refrigerant as defined in claim 3, further comprising a first throttling device; and
The economizer includes an input and the first throttling device is connected between the output of the first heat exchanger and the input of the economizer; or the economizer comprises two inputs and the first throttling means is connected between the output of the first heat exchanger and the first input of the economizer and the output of the first heat exchanger is directly connected to the second input of the economizer.
5. The system for thermal management of energy storage by vapor augmented by direct evaporation of an intermediate refrigerant as recited in claim 4, further comprising:
A second throttling device configured to be connected between an input of the second heat exchanger and a second output of the economizer;
a filter configured to be connected between the second output of the economizer and the input of the second throttling device.
6. The system of claim 5, wherein the first throttling device is a first electronic expansion valve, and the second throttling device is a second electronic expansion valve; and
Under the refrigeration working condition, the first heat exchanger is a condenser, and the second heat exchanger is an evaporator; and under the heating working condition, the second heat exchanger is a condenser, and the first heat exchanger is an evaporator.
7. The system for thermal management of energy storage by vapor enrichment and enthalpy increase by direct evaporation of an intermediate refrigerant according to claim 6,
Under the refrigeration working condition, all or part of the refrigerant from the condenser enters the economizer through the first electronic expansion valve, the first part of refrigerant in the economizer is evaporated to cool the second part of refrigerant which is not evaporated, the second part of refrigerant which is not evaporated enters the evaporator through the second electronic expansion valve of the main path, the refrigerant is evaporated in the evaporator and finally returns to the air return side of the compressor, and the first part of refrigerant evaporated in the economizer enters the air supply port of the compressor through the auxiliary path as gas;
The air supplementing port of the compressor is a first input end of the compressor, and the air returning side of the compressor is a second input end of the compressor; and
And determining the flow rate of the auxiliary path refrigerant according to the selected type of the economizer and the control parameter of the first throttling device.
8. The system for thermal management of energy storage by vapor augmented by direct evaporation of an intermediate refrigerant as recited in claim 7 wherein the economizer is selected in accordance with the following method:
According to the calculated air supplementing pressure under the rated working condition and the refrigerant parameters from the condenser, selecting the type of the economizer;
wherein the air supplementing pressure is as follows:
where Pd is the discharge pressure and Ps is the suction pressure.
9. The system of claim 8, wherein the control parameters of the first throttling device include: the superheat degree of the inlet of the auxiliary way of the compressor is 2-10 ℃ by adjusting the first throttling device.
10. The utility model provides a middle refrigerant direct evaporation's air supplementing increases enthalpy energy storage heat management system which characterized in that includes:
a compressor;
A first heat exchange device and a second heat exchange device, which are respectively arranged between the compressor and the first electronic expansion valve and between the compressor and the second electronic expansion valve;
a first electronic expansion valve and a second electronic expansion valve respectively arranged between the first heat exchange device and the economizer and in the main path; and
The economizer, refrigerant in it is divided into main road and auxiliary road, wherein auxiliary road refrigerant evaporates in the economizer and takes away the partial heat of main road refrigerant and directly gets back to the compressor, and main road refrigerant gets back to the compressor after passing second electronic expansion valve and second heat transfer device.
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| CN118457157A (en) * | 2024-07-10 | 2024-08-09 | 比亚迪股份有限公司 | Thermal management systems and vehicles |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118457157A (en) * | 2024-07-10 | 2024-08-09 | 比亚迪股份有限公司 | Thermal management systems and vehicles |
| CN118457157B (en) * | 2024-07-10 | 2024-11-15 | 比亚迪股份有限公司 | Thermal management system and vehicle |
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