CN115626189A - Rail air conditioner control system and method integrating waste heat utilization - Google Patents
Rail air conditioner control system and method integrating waste heat utilization Download PDFInfo
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- CN115626189A CN115626189A CN202210728846.1A CN202210728846A CN115626189A CN 115626189 A CN115626189 A CN 115626189A CN 202210728846 A CN202210728846 A CN 202210728846A CN 115626189 A CN115626189 A CN 115626189A
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- 239000002918 waste heat Substances 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000000446 fuel Substances 0.000 claims abstract description 89
- 239000002826 coolant Substances 0.000 claims abstract description 38
- 239000000110 cooling liquid Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims description 52
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 31
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 238000010248 power generation Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 8
- 238000004378 air conditioning Methods 0.000 description 6
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
- B61D27/00—Heating, cooling, ventilating, or air-conditioning
- B61D27/0036—Means for heating only
- B61D27/0063—Means for heating only the heat being derived from independent means, i.e. autonomous devices, e.g. stoves
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04029—Heat exchange using liquids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04007—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids related to heat exchange
- H01M8/04067—Heat exchange or temperature measuring elements, thermal insulation, e.g. heat pipes, heat pumps, fins
- H01M8/04074—Heat exchange unit structures specially adapted for fuel cell
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/20—Fuel cells in motive systems, e.g. vehicle, ship, plane
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T30/00—Transportation of goods or passengers via railways, e.g. energy recovery or reducing air resistance
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Fuel Cell (AREA)
Abstract
The invention discloses a rail air conditioner control system integrating waste heat utilization, which comprises a fuel cell, a coolant outlet, a first two-way valve, a second two-way valve, a heat exchanger, a fuel cell radiator and a coolant inlet, wherein the first two-way valve is arranged between the coolant outlet and the heat exchanger, the second two-way valve is arranged between the coolant outlet and the fuel cell radiator, and the coolant inlet is connected with the fuel cell radiator. According to the invention, the flow distribution of the cooling liquid of the fuel cell under different power generation powers can be accurately controlled through the first two-way valve and the second two-way valve, so that the damage of the fuel cell reactor caused by uneven flow distribution of the cooling liquid is avoided. The invention also relates to a control method of the track air conditioner control system utilizing the integrated waste heat utilization, which controls the gear of the heat exchanger according to the difference value of the indoor temperature and the set temperature, improves the control effect on the temperature in the carriage and improves the comfort of passengers.
Description
Technical Field
The invention belongs to the technical field of rail transit air conditioning systems, and particularly relates to a rail air conditioning control system integrating waste heat utilization and a control method.
Background
With the rapid development of the hydrogen fuel cell, the hydrogen fuel cell tramcar is a novel rail vehicle, and has the advantages of zero emission, no pollution, high conversion efficiency and the like. The power required by the train is provided by a hydrogen fuel cell, and a cell reactor of the train can release a large amount of heat in the reaction process besides generating required electric energy. By adding the waste heat exchanger in the passenger room air conditioner, when heating in winter, high-temperature cooling liquid generated by the reaction of the fuel cell system is connected by a pipeline and flows through the heat exchanger of the rail air conditioner, and the fan blows air to the heat exchanger, so that the heat of the fuel cell can be effectively utilized to heat the interior of a carriage.
Chinese patent application publication No. CN110696591a discloses a vehicle-mounted air conditioner using waste heat of a fuel cell, which comprises a condenser and a compressor, wherein the condenser and the compressor form a circulation path through a refrigerant pipeline; the vehicle-mounted air conditioner further comprises a fuel cell radiator, wherein the fuel cell radiator is connected with the fuel cell through a cooling liquid pipeline, and the fuel cell radiator is installed in an air circulation system of the vehicle-mounted air conditioner or integrated with the condenser. This patent is used for the heating with fuel cell waste heat, has reduced whole car energy consumption, but coolant liquid flow distributes unevenly and can lead to the damage of fuel cell reactor, lacks corresponding technological means among the prior art.
The present invention has been made in view of this situation.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a rail air conditioner control system for integrating waste heat utilization by grading the flow of cooling liquid with different generated power of a fuel cell system.
The invention further aims to provide a control method of the rail air conditioner control system utilizing the integrated waste heat utilization.
In order to realize the first invention purpose, the invention adopts the following technical scheme:
the rail air conditioner control system integrating waste heat utilization comprises a fuel cell, a cooling liquid outlet, a first two-way valve, a second two-way valve, a heat exchanger, a fuel cell radiator and a cooling liquid inlet, wherein the first two-way valve is arranged between the cooling liquid outlet and the heat exchanger, the second two-way valve is arranged between the cooling liquid outlet and the fuel cell radiator, and the cooling liquid inlet is connected with the fuel cell radiator.
Further, a third two-way valve is arranged between the fuel cell radiator and the heat exchanger.
Further, the heat exchanger adopts a stainless steel tube aluminum fin heat exchanger.
In order to achieve the second object, the invention adopts the following technical scheme:
a control method of a rail air conditioner control system utilizing the integrated waste heat utilization comprises three control modes, namely a non-heating mode, a first heating mode when a fuel cell system works and a second heating mode when the fuel cell system stops;
when the heating mode is in a non-heating mode, the first two-way valve is closed, and the opening degree of the second two-way valve is automatically adjusted by the fuel cell system;
when the temperature of the cooling liquid is lower than the preset control temperature Tys of the cooling liquid, controlling the first two-way valve to be closed, and automatically adjusting the opening degree of the second two-way valve by the fuel cell system;
and when the temperature Ty of the cooling liquid is greater than or equal to the set control temperature Tys of the cooling liquid, controlling the first two-way valve to be opened, and adjusting the opening degrees of the first two-way valve and the second two-way valve according to the output power of the fuel cell.
Furthermore, the heat exchange output of the heat exchanger is divided into at least two gears, the heat exchange output of the gear 1 is 100%, and then the heat exchange output of the gear is gradually reduced.
Further, the heat exchange quantity output gear of the heat exchanger is judged according to the relation between the indoor temperature Tin and the set temperature Ts,
when Tin is more than or equal to Ts + delta T, the heat exchanger is closed;
when Tin is less than Ts, operating a gear 1;
and delta T is the temperature allowance, when Ts is less than or equal to Tin and less than Ts + delta T, the rest gears are operated, and the smaller the temperature difference between the indoor temperature Tin and the set temperature Ts is, the higher the heat exchange quantity output of the corresponding gear is.
Further, the output power of the fuel cell is divided into a plurality of gears, and the opening degrees of the first two-way valve and the second two-way valve are judged according to the gears of the output power of the heat exchanger and the fuel cell.
Furthermore, the corresponding relation between the first two-way valve and the second two-way valve and the output power gear and the heat exchanger gear of the fuel cell is stored in a control unit in advance, and the control unit adjusts the opening degrees of the first two-way valve and the second two-way valve.
Further, when the outdoor temperature Tout is less than or equal to the outdoor control temperature Tos in the first heating mode, the heat pump is prohibited from being started.
Further, when the outdoor temperature Tout is greater than the outdoor control temperature Tos and the first two-way valve is opened in the first heating mode, the difference value between the indoor temperature Tin and the set temperature Ts is judged, and if the heating rate is smaller than the preset heating rate and the indoor temperature Tin is smaller than the set temperature Ts, the heat pump system is started; and when the indoor temperature Tin reaches the set temperature Ts, closing the heat pump system.
Further, a return difference is set at the coolant setting control temperature Tys.
Further, when the heating device is in the first heating mode, the third two-way valve is opened; when the heating mode is in the non-heating mode and the second heating mode, the third two-way valve is closed.
After adopting the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. the fuel cell reactor can accurately control the flow distribution of the cooling liquid of the fuel cell under different power generation powers through the first two-way valve and the second two-way valve, and avoids the damage of the fuel cell reactor caused by uneven flow distribution of the cooling liquid.
2. The invention adopts the stainless steel tube aluminum fin heat exchanger, can reduce the ion rate of the cooling liquid of the fuel cell system and improve the stability of the fuel cell system.
3. According to the invention, the gear of the heat exchanger is controlled according to the difference value between the indoor temperature and the set temperature, so that the control effect on the temperature in the carriage is improved, and the comfort of passengers is improved.
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention, are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention to the right. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:
fig. 1 is a schematic diagram of the overall layout of the fuel cell waste heat utilization.
In the figure: 1. a fuel cell; 2. a coolant outlet; 3. a second two-way valve; 4. a first two-way valve; 5. a heat exchanger; 6. a third two-way valve; 7. a fuel cell radiator; 8. a coolant inlet.
It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, the present invention provides a rail air conditioner control system integrating waste heat utilization, which includes a fuel cell 1, a coolant outlet 2, a first two-way valve 4, a second two-way valve 3, a third two-way valve 6, a heat exchanger 5, a fuel cell radiator 7 and a coolant inlet 8, wherein the first two-way valve 4 is disposed between the coolant outlet 2 and the heat exchanger 5, the second two-way valve 3 is disposed between the coolant outlet 2 and the fuel cell radiator 7, the third two-way valve 6 is disposed between the heat exchanger 5 and the fuel cell radiator 7, and the coolant inlet 8 is connected with the fuel cell radiator 7, in fig. 1, the fuel cell 1 includes a water pump and a deionizer, and the heat exchanger 5 is installed in an air circulation system of a train air conditioner set or integrated with a condenser. The heat exchanger 5 of the invention preferably adopts a stainless steel aluminum fin heat exchanger, and because of extremely strong corrosion resistance, the ion rate of the cooling liquid of the fuel cell system can be reduced, and the stability of the fuel cell system is improved.
As shown in fig. 1, a refrigerant outlet of a compressor in the train air conditioning unit is connected with a refrigerant inlet of a condenser, a refrigerant outlet of the condenser is connected with a refrigerant inlet of an evaporator through a throttle valve, a refrigerant outlet of the evaporator is connected with a refrigerant inlet of the compressor, and the direction of an arrow of the train air conditioning unit in fig. 1 indicates the flow direction of the refrigerant.
The invention also relates to a control method of the rail air conditioner control system utilizing the integrated waste heat utilization, which comprises three control modes, namely a non-heating mode, a first heating mode when the fuel cell system works and a second heating mode when the fuel cell system stops.
In the first embodiment, when the first heating mode is performed, the third two-way valve 6 is opened, whether the first two-way valve 4 needs to be opened is determined according to the coolant temperature Ty, and when the coolant temperature Ty is lower than the coolant set control temperature Tys, the first two-way valve 4 is closed, and at this time, the coolant flows out from the coolant outlet 2, enters the fuel cell radiator 7 through the second two-way valve 3, and then enters the fuel cell 1 from the coolant inlet 8 for recycling.
When the coolant temperature Ty is greater than or equal to the coolant set control temperature Tys, the first two-way valve 4 is opened, and the second two-way valve 3 is changed from the autonomously adjusted opening degree to the determination according to the output power of the fuel cell 1. At this time, a part of the coolant enters the fuel cell radiator 7 through the second two-way valve 3, the other part of the coolant enters the heat exchanger 5 through the first two-way valve 4 and enters the fuel cell radiator 7 through the third two-way valve 6, in the process, the heat of the high-temperature coolant flowing out of the fuel cell 1 is transferred to air, the heated air enters the vehicle compartment to realize heating of the vehicle compartment, and the coolant flowing through the second two-way valve 4 and the third two-way valve 6 is collected in the fuel cell radiator 7 and enters the fuel cell 1 through the coolant inlet 8 to realize cyclic utilization.
The heat exchanger 5 is divided into different gears according to the heat exchange quantity output, the heat exchange quantity output of the gear 1 is the highest, and the heat exchange quantity outputs of the other gears are gradually reduced. For example, the gear position of the heat exchanger 5 is set to the gear position 1 and the gear position 2 according to the heat exchange amount output, the gear position 1 is 100% heating capacity output, the gear position 2 is 50% heating capacity output, further, the 100% heating capacity output corresponds to 20L/min coolant flow, and the 50% heating capacity output corresponds to 10L/min coolant flow.
In this embodiment, it is more preferable that the operating range of the heat exchanger 5 is determined according to the relationship between the indoor temperature Tin and the set temperature Ts, and the specific logic is as follows:
if Tin is more than or equal to Ts + delta T, closing the heat exchanger;
if Tin is less than Ts, starting a gear 1;
where Δ T is a temperature margin, and when Ts is less than or equal to Tin and less than Ts + Δ T, the shift position 2 is turned on, and further, Δ T is defined as 1 in this embodiment.
Or setting the gear of the heat exchanger 5 to gear 1, gear 2, gear 3 and gear 4 according to the heat exchange amount, wherein the gear 1 is 100% heating capacity output, the gear 2 is 75% heating capacity output, the gear 3 is 50% heating capacity output, and the gear 4 is 25% heating capacity output, further, the 100% heating capacity output corresponds to 20L/min cooling liquid flow, the 75% heating capacity output corresponds to 15L/min cooling liquid flow, the 50% heating capacity output corresponds to 10L/min cooling liquid flow, and the 25% heating capacity output corresponds to 5L/min cooling liquid flow.
The logic for judging the operating gear of the heat exchanger 5 according to the indoor temperature Tin and the set temperature Ts is as follows:
if Tin is more than or equal to Ts + delta T, closing the heat exchanger;
if Tin is less than Ts, starting a gear 1;
ts is more than or equal to Tin and less than Ts + delta T1, and a gear 2 is started;
the Ts + delta T1 is less than or equal to Tin and less than Ts + delta T2, and a gear 3 is started;
ts + delta T2 is more than or equal to Tin and less than Ts + delta T, and a gear 4 is started;
Δ T1, Δ T2 are the first temperature margin and the second temperature margin, respectively, and further, Δ T1 and Δ T2 may be defined as 0.3 and 0.6, respectively.
In order to avoid damage to the reactor of the fuel cell 1 caused by uneven distribution of the coolant flow of the first two-way valve 4 and the second two-way valve 3, the opening degrees of the first two-way valve 4 and the second two-way valve 3 are judged according to the real-time output power provided by the fuel cell 1 and the gear of the heat exchanger 5, so that the coolant circulation volume of the fuel cell system is prevented from being influenced by a waste heat system, the corresponding relation between the output power of the fuel cell 1 and the gear of the heat exchanger 5 and the first two-way valve 4 and the second two-way valve 3 is stored in a control unit (not shown in the figure) in advance, and the control unit adjusts the opening degrees of the first two-way valve 4 and the second two-way valve 3.
Taking the example that the output power of the fuel cell is divided into one gear every 10kW or 20kW, and the gear of the heat exchanger 5 is divided into the gear 1 and the gear 2, the corresponding relationship between the opening degree of the first two-way valve 4 and the output power P (kW) of the different fuel cells 1 and the gear of the heat exchanger 5 is as follows:
in the above table, as the output power of the fuel cell 1 increases, the coolant required by the fuel cell increases, so that the opening degree of the first two-way valve 4 corresponding to the opening degrees from A1 to A6 and from B1 to B6 gradually decreases; because the heat exchange output corresponding to the gear 1 is greater than the heat exchange output corresponding to the gear 2, when the output power of the corresponding fuel cell 1 is the same, the opening degree of the first two-way valve 4 corresponding to the gear 1 is greater than the opening degree of the first two-way valve 4 corresponding to the gear 2.
The corresponding relationship between the opening degree of the second two-way valve 3 and the output power P (kW) of different fuel cells 1 and the gear of the heat exchanger 5 is as follows:
in the above table, as the output power of the fuel cell increases, the coolant required by the fuel cell increases, so that the opening degree of the second two-way valve 3 corresponding to the opening degrees from C1 to C6 and from D1 to D6 gradually increases; because the heat exchange output corresponding to the gear 1 is greater than the heat exchange output corresponding to the gear 2, the opening degree of the second two-way valve 3 corresponding to the gear 1 is greater than the opening degree of the second two-way valve 3 corresponding to the gear 2 when the output powers of the corresponding fuel cells 1 are the same.
It should be noted that the correspondence relationship between the output power of the fuel cell 1 and the gear position of the heat exchanger 5 and the opening degrees of the first two-way valve 4 and the second two-way valve 3 is only an exemplary illustration, and is not intended to limit the invention, and when the output power gear position division of the fuel cell 1 and the gear position division of the heat exchanger 5 are different from the above table, the correspondence relationship between the output power of the fuel cell 1 and the gear position of the heat exchanger 5 and the opening degrees of the first two-way valve 4 and the second two-way valve 3 also belongs to the protection scope of the invention.
Preferably, a return difference is set at the cooling liquid set control temperature Tys, so that the influence on the comfort in the passenger room caused by frequent operation of the air conditioning system is avoided.
Preferably, when in the first heating mode, the outdoor temperature Tout and the outdoor control temperature Tos are determined, and if the outdoor temperature Tout is less than or equal to the outdoor control temperature Tos, the heat pump is prohibited from being started so as to protect the compressor; if the outdoor temperature Tout is greater than the outdoor control temperature Tos and the first two-way valve 4 is in the on state, the difference value between the indoor temperature Tin and the set temperature Ts is judged, if the heating rate is lower than the preset heating rate and the indoor temperature Tin is lower than the set temperature Ts, the heat pump system is started, and when the indoor temperature reaches the set temperature, the heat pump system is closed.
For example, in the above situation, the indoor temperature Tin is determined once every 3min, if the temperature difference between the two determinations is less than 3 ℃, the temperature rise rate is less than the preset temperature rise rate, and if the indoor temperature Tin is less than the set temperature Ts at this time, the heat pump system is started, preferably, in order to avoid frequent switching of the heat pump system caused by the indoor temperature Tin being greater than or equal to the set temperature Ts after the heat exchanger operates for a period of time, the heat pump system is started with a delay, and further, the delay of the embodiment is set to 8min.
In the second heating mode, the air conditioning unit turns on the heat pump according to the normal control logic.
In the third embodiment, when the air conditioner is in the non-heating mode, the first two-way valve 4 and the third two-way valve 6 are both closed, the opening degree of the second two-way valve 3 is automatically adjusted by the fuel cell 1, and at this time, the third two-way valve 6 is in the closed state, so that the situation that the cooling liquid at high temperature flows back to the heat exchanger 5 to affect the air conditioner cooling effect can be avoided.
The above description is only for the preferred embodiment of the present invention, and not intended to limit the present invention in any way, and although the present invention has been disclosed by the preferred embodiment, it is not intended to limit the present invention, and those skilled in the art can make various changes and modifications to the equivalent embodiment without departing from the scope of the present invention.
Claims (12)
1. The utility model provides an integrated waste heat utilization's track air conditioner control system which characterized in that: the fuel cell heat radiator comprises a fuel cell (1), a coolant outlet (2), a first two-way valve (4), a second two-way valve (3), a heat exchanger (5), a fuel cell heat radiator (7) and a coolant inlet (8), wherein the first two-way valve (4) is arranged between the coolant outlet (2) and the heat exchanger (5), the second two-way valve (3) is arranged between the coolant outlet (2) and the fuel cell heat radiator (7), and the coolant inlet (8) is connected with the fuel cell heat radiator (7).
2. The integrated waste heat utilization rail air conditioner control system according to claim 1, characterized in that: and a third two-way valve (6) is arranged between the fuel cell radiator (7) and the heat exchanger (5).
3. The integrated waste heat utilization track air conditioner control system according to claim 1 or 2, characterized in that: the heat exchanger (5) adopts a stainless steel tube aluminum fin heat exchanger.
4. A control method of a rail air conditioner control system using integrated waste heat utilization according to any one of claims 1 to 3, characterized in that: the control method comprises three control modes, namely a non-heating mode, a first heating mode when the fuel cell system works and a second heating mode when the fuel cell system is stopped;
when the heating mode is in a non-heating mode, the first two-way valve (4) is closed, and the opening degree of the second two-way valve (3) is automatically adjusted by the fuel cell system;
when the heating mode is in the first heating mode, whether the first two-way valve (4) is started or not is judged according to the temperature Ty of the cooling liquid, when the temperature Ty of the cooling liquid is smaller than the set control temperature Tys of the cooling liquid, the first two-way valve (4) is controlled to be closed, and the opening degree of the second two-way valve (3) is automatically adjusted by the fuel cell system;
and when the temperature Ty of the cooling liquid is greater than or equal to the set control temperature Tys of the cooling liquid, controlling the first two-way valve (4) to be opened, and adjusting the opening degrees of the first two-way valve (4) and the second two-way valve (3) according to the output power of the fuel cell (1).
5. The control method according to claim 4, characterized in that: the heat exchange output of the heat exchanger (5) is divided into at least two gears, the heat exchange output of the gear 1 is 100%, and the heat exchange output of the later gears is gradually reduced.
6. The control method according to claim 5, characterized in that: judging the heat exchange quantity output gear of the heat exchanger according to the relation between the indoor temperature Tin and the set temperature Ts,
when Tin is more than or equal to Ts + delta T, the heat exchanger is closed;
when Tin is less than Ts, operating a gear 1;
and delta T is the temperature allowance, when Ts is less than or equal to Tin and less than Ts + delta T, the rest gears are operated, and the smaller the temperature difference between the indoor temperature Tin and the set temperature Ts is, the higher the heat exchange quantity output of the corresponding gear is.
7. The control method according to claim 5, characterized in that: the output power of the fuel cell (1) is divided into a plurality of gears, and the opening degrees of the first two-way valve (4) and the second two-way valve (3) are judged according to the gears of the output power of the fuel cell (1) and the heat exchanger (5).
8. The control method according to claim 7, characterized in that: the corresponding relation between the first two-way valve (4) and the second two-way valve (3) and the output power gear and the heat exchanger gear of the fuel cell (1) is stored in a control unit in advance, and the control unit adjusts the opening degrees of the first two-way valve (4) and the second two-way valve (3).
9. The control method according to claim 4, characterized in that: when the outdoor temperature Tout is less than or equal to the outdoor control temperature Tos, the heat pump is prohibited from starting.
10. The control method according to claim 4, characterized in that: when the outdoor temperature Tout is greater than the outdoor control temperature Tos and the first two-way valve (4) is opened in the first heating mode, the difference value between the indoor temperature Tin and the set temperature Ts is judged, and if the heating rate is smaller than the preset heating rate and the indoor temperature Tin is smaller than the set temperature Ts, the heat pump system is started; and when the indoor temperature Tin reaches the set temperature Ts, closing the heat pump system.
11. The control method according to claim 4, characterized in that: and setting a return difference at the set control temperature Tys of the cooling liquid.
12. The control method according to any one of claims 4 to 11, characterized in that: when the heating device is in the first heating mode, the third two-way valve (6) is opened; when in the non-heating mode and the second heating mode, the third two-way valve (6) is closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210728846.1A CN115626189A (en) | 2022-06-24 | 2022-06-24 | Rail air conditioner control system and method integrating waste heat utilization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210728846.1A CN115626189A (en) | 2022-06-24 | 2022-06-24 | Rail air conditioner control system and method integrating waste heat utilization |
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| CN115626189A true CN115626189A (en) | 2023-01-20 |
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| CN202210728846.1A Pending CN115626189A (en) | 2022-06-24 | 2022-06-24 | Rail air conditioner control system and method integrating waste heat utilization |
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Citations (6)
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