A waste heat recycling automobile air conditioning system and automobile

Abstract

This disclosure provides an automotive air conditioning system and a vehicle that utilizes waste heat recovery. The automotive air conditioning system includes an air circulation cooling system and a waste heat recovery system. The air circulation cooling system includes a first compressor, a first heat exchanger, a second compressor, a second heat exchanger, a regenerator, a condenser, a water separator, a regenerator, a first turbine, a condenser, and a second turbine, all connected in sequence. The outlet of the second turbine is connected to the vehicle's passenger compartment. The waste heat recovery system includes a first motor, a generator, and a third compressor, a waste heat recovery heat exchanger, and a third turbine, all connected in sequence. The outlet of the third turbine is connected to the vehicle's passenger compartment. The first motor drives the third compressor. The output shaft of the third turbine is connected to the generator to drive the generator to generate electricity. The generator is connected to the first motor to drive the first motor. Through the embodiments of this disclosure, the engine power consumed by the automotive air conditioning system can be reduced.

Description

Technical Field

[0001] This invention relates to the field of automotive technology, specifically to an automotive air conditioning system that recovers and utilizes waste heat, and to an automotive vehicle. Background Technology

[0002] Most automotive air conditioning systems currently use vapor cycle refrigeration (VCS) systems. This involves a compressor, condenser, expansion valve, and evaporator to form a refrigeration cycle. The working refrigerant is compressed into a high-temperature, high-pressure vapor in the compressor, condensed into a liquid by the outside air in the condenser, then its pressure is reduced by the expansion valve, and finally it evaporates in the evaporator, absorbing heat from the air being processed and cooling it down. VCS systems typically use organic refrigerants such as R134a and R22 as the working refrigerant. However, the operation of an automotive VCS consumes approximately 10-15% of the engine's output power, increasing the vehicle's average fuel consumption. Summary of the Invention

[0003] In view of this, the present disclosure provides an automotive air conditioning system and an automotive vehicle that recovers and utilizes waste heat, which at least partially solves the problems existing in the prior art.

[0004] The first aspect of this disclosure provides an automotive air conditioning system for waste heat recovery and utilization, including an air circulation cooling system and a waste heat recovery system. The air circulation refrigeration system includes, in sequence, a first compressor, a first heat exchanger, a second compressor, a second heat exchanger, a regenerator, a condenser, a water separator, a first turbine, a condenser, and a second turbine. The regenerator includes a first inlet, a second inlet, a first outlet, and a second outlet. The condenser includes a third inlet, a fourth inlet, a third outlet, and a fourth outlet. The outlet of the second heat exchanger is connected to the first inlet, the first outlet is connected to the third inlet, the third outlet is connected to the inlet of the water separator, the outlet of the water separator is connected to the second inlet, the second outlet is connected to the inlet of the first turbine, the outlet of the first turbine is connected to the fourth inlet, and the fourth outlet is connected to the second turbine. The outlet of the second turbine is used to connect to the vehicle's driver's compartment. The waste heat recovery system includes a first motor, a generator, and, in sequence, a third compressor, a waste heat recovery heat exchanger, and a third turbine. The outlet of the third turbine is used to connect to the vehicle's driver's compartment. The first motor is used to drive the third compressor. The output shaft of the third turbine is connected to the generator to drive the generator to generate electricity. The generator is connected to the first motor to drive the first motor to operate.

[0005] According to one specific implementation of the present disclosure, the air circulation refrigeration system further includes a second motor, which is connected to the first compressor and is used to drive the first compressor. A generator is connected to the second motor to drive the second motor to operate.

[0006] According to one specific implementation of the present disclosure, the air circulation cooling system further includes a fan, which is used to draw in outside air so that the outside air flows sequentially through the second heat exchanger and the first heat exchanger.

[0007] According to one specific implementation of this disclosure, the fan is connected to the output shaft of the second turbine, and the output power of the second turbine is used to drive the fan to run.

[0008] According to one specific implementation of this disclosure, the output port of the first turbine is connected to the second compressor, and the output power of the first turbine is used to drive the second compressor to operate.

[0009] According to one specific implementation of the present disclosure, the automotive air conditioning system further includes a three-way valve, including a first port, a second port and a third port, wherein the outlet of the second turbine is connected to the first port, the outlet of the third turbine is connected to the second port, and the third port is used to connect to the vehicle's cockpit.

[0010] According to a specific implementation of this disclosure, the automotive air conditioning system further includes a first flow valve and a second flow valve. The first flow valve is disposed between the outlet of the second turbine and the first port, and is used to control the air flow rate of the first port. The second flow valve is disposed between the outlet of the third turbine and the second port, and is used to control the air flow rate of the second port.

[0011] A second aspect of this disclosure provides an automobile, including any of the waste heat recovery and utilization systems described in the first aspect of the present invention.

[0012] The waste heat recovery and utilization automotive air conditioning system in this embodiment includes an air circulation cooling system and a waste heat recovery system. Compared with the prior art, the air circulation cooling system and the waste heat recovery system are combined. The air circulation cooling system cools the outside air and supplies it to the vehicle's cabin through a connected structure consisting of a compressor, a first heat exchanger, a second compressor, a second heat exchanger, a regenerator, a condenser, a water separator, a first turbine, and a second turbine. In the waste heat recovery system, the outside air is first compressed by a third compressor driven by a first motor to increase its pressure and temperature. Then, it exchanges heat with the high-temperature exhaust gas from the vehicle engine in the waste heat recovery heat exchanger to increase its temperature. It then enters the third turbine for expansion and cooling, and finally supplies the air to the vehicle's cabin. The output power of the third turbine supplies power to a generator, which drives the first motor to drive the first compressor. In other words, the waste heat recovery system can obtain cooled air to supply the vehicle's cabin without consuming engine power, thereby reducing the engine power consumed by the automotive air conditioning system. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. Obviously, the drawings described below are merely some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of an automotive air conditioning system for waste heat recovery and utilization, provided as an embodiment of the first aspect of this disclosure.

[0015] Figure label:

[0016] 100. Automotive air conditioning system; 10. Air circulation refrigeration system; 101. First compressor; 102. First heat exchanger; 103. Second compressor; 104. Second heat exchanger; 105. Regenerator; 105a. First inlet; 105b. First outlet; 105c. Second inlet; 105d. Second outlet; 106. Condenser; 106a. Third inlet; 106b. Third outlet; 106c. Fourth inlet; 1 06d, Fourth outlet; 107, Water separator; 108, First turbine; 109, Second turbine; 110, Second motor; 111, Fan; 20, Waste heat recovery system; 201, First motor; 202, Generator; 203, Third compressor; 204, Waste heat recovery heat exchanger; 205, Third turbine; 30, Three-way valve; 301, First port; 302, Second port; 303, Third port; 200, Car cockpit. Detailed Implementation

[0017] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0018] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0019] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this disclosure. The drawings only show the components related to this disclosure and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0020] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0021] Most automotive air conditioning systems currently use vapor cycle refrigeration (VCS) systems. This involves a compressor, condenser, expansion valve, and evaporator to form a refrigeration cycle. The working refrigerant is compressed into a high-temperature, high-pressure vapor in the compressor, condensed into a liquid by the outside air in the condenser, then depressurized by the expansion valve, and finally evaporates in the evaporator, absorbing heat from the air being processed and cooling it down. VCS systems typically use organic refrigerants such as R134a and R22 as the working refrigerant. When an automotive VCS is running, it consumes approximately 10% to 15% of the engine's output power, increasing the vehicle's average fuel consumption. While the exhaust from the car engine has a high temperature and still has significant potential for use, current internal combustion engines directly release it into the atmosphere after their stroke, resulting in energy waste. Furthermore, VCS systems cannot directly dehumidify the air being processed; physical or chemical dehumidification methods are required after the air has cooled and released moisture, sometimes with poor results or the need for an additional dehumidification system. Furthermore, VCS uses organic refrigerants, which can damage the atmospheric environment and pose a risk of environmental pollution if leaked, thus failing to achieve green and environmentally friendly practices.

[0022] To address the aforementioned problems, this disclosure provides an automotive air conditioning system and an automotive vehicle that recovers and utilizes waste heat. The embodiments of this disclosure are described in detail below with reference to the accompanying drawings.

[0023] Please refer to Figure 1The first aspect of this disclosure discloses an automotive air conditioning system 100 for waste heat recovery and utilization, including an air circulation refrigeration system 10 and a waste heat recovery system 20. The air circulation refrigeration system 10 includes a first compressor 101, a first heat exchanger 102, a second compressor 103, a second heat exchanger 104, a regenerator 105, a condenser 106, a water separator 107, a first turbine 108, a second turbine 109, all connected in sequence. The regenerator 105 includes a first inlet 105a, a second inlet 105c, a first outlet 105b, and a second outlet 105d. The condenser 106 includes a third inlet 106a, a fourth inlet 106c, a third outlet 106b, and a fourth outlet 106d. The outlet of the second heat exchanger 104 is connected to the first inlet 105a, the first outlet 105b is connected to the third inlet 106a, and the third outlet 106b is connected to the inlet of the water separator 107. The outlet of the first turbine 105d is connected to the second inlet 105c, the second outlet 105d is connected to the inlet of the first turbine 108, the outlet of the first turbine 108 is connected to the fourth inlet 106c, the fourth outlet 106d is connected to the second turbine 109, and the outlet of the second turbine 109 is used to connect to the vehicle's driver's cabin 200; the waste heat recovery system 20 includes a first motor 201, a generator 202, and a third compressor 203, a waste heat recovery heat exchanger 204, and a third turbine 205 connected in sequence. The outlet of the third turbine 205 is used to connect to the vehicle's driver's cabin 200, and the first motor 201 is used to drive the third compressor 203; the output shaft of the third turbine 205 is connected to the generator 202 to drive the generator 202 to generate electricity, and the generator 202 is connected to the first motor 201 to drive the first motor 201 to operate.

[0024] In the air circulation refrigeration system 10, outside air is first compressed by the first compressor 101 to increase its pressure and temperature. It then flows through the first heat exchanger 102 to be cooled, and subsequently flows through the second compressor 103 for further compression. The air exiting the second compressor 103 flows into the second heat exchanger 104 for further cooling. It then flows into the first inlet 105a of the regenerator 105 and out through the first outlet 105b. Finally, it enters the condenser 106 through the third inlet 106a and exits through the third outlet 106b, further cooling the outside air. At this point, the outside air has a higher pressure and lower temperature, causing moisture to precipitate out. This moisture is then separated by the water separator 107, completing the dehumidification process. Subsequently, outside air re-enters the regenerator 105 through the second inlet 105c to raise its temperature. The heated outside air then enters the first turbine 108 to expand and cool down. After exiting the first turbine 108, the outside air enters the condenser 106 through the fourth inlet 106c to be heated. After exiting the condenser 106 through the fourth outlet 106d, the outside air enters the second turbine 109 to expand and cool down. The cooled outside air is then supplied to the car's driver's cabin 200.

[0025] In the waste heat recovery system 20, outside air is first compressed by the third compressor 203 driven by the first motor 201, increasing its pressure and temperature. It then flows through the waste heat recovery heat exchanger 204, where it exchanges heat with the high-temperature exhaust gas from the car engine, further raising its temperature. After exiting the waste heat recovery heat exchanger 204, it is expanded and cooled by the third turbine 205 before flowing into the car's passenger compartment 200. The output power of the third turbine 205 supplies electricity to the generator 202, which in turn drives the first motor 201.

[0026] The waste heat recovery and utilization automotive air conditioning system 100 provided in this application embodiment combines an air circulation cooling system 10 and a waste heat recovery system 20, compared to the prior art. The air circulation cooling system 10 cools the outside air and supplies it to the vehicle's passenger compartment 200 through a connected structure consisting of a compressor, a first heat exchanger 102, a second compressor 103, a second heat exchanger 104, a regenerator 105, a condenser 106, a water separator 107, a first turbine 108, and a second turbine 109. In the waste heat recovery system 20, the heat in the exhaust gas from the engine is converted into mechanical energy by a third turbine 205. This mechanical energy is supplied to a generator 202 to generate electricity, which in turn drives a third compressor. In other words, at least the waste heat recovery system 20 can obtain cooled air to supply to the vehicle's passenger compartment 200 without consuming engine power, thereby reducing the engine power consumed by the automotive air conditioning system 100.

[0027] In addition, the air circulation cooling system 10 can increase the pressure of the outside air, thereby increasing its dew point temperature, so that the cooled outside air can release more moisture, thus achieving a better initial effect; furthermore, the air circulation cooling system 10 does not require the use of additional refrigerant.

[0028] In some alternative embodiments, the air circulation cooling system 10 further includes a second motor 110 connected to the first compressor 101 and used to drive the first compressor 101. A generator 202 is connected to the second motor 110 to drive the second motor 110.

[0029] In these alternative embodiments, the generator 202 is connected to the second motor 110 that drives the first compressor 101 to drive the second motor 110 to improve energy utilization. In this way, the air circulation cooling system 10 can also reduce the consumption of engine power, thereby reducing the engine power occupied by the car air conditioning system 100 and reducing the car's fuel consumption.

[0030] In some alternative embodiments, the air circulation cooling system 10 further includes a fan 111, which draws in outside air so that the outside air flows sequentially through the second heat exchanger 104 and the first heat exchanger 102. The fan 111 is connected to the output shaft of the second turbine 109, and the output power of the second turbine 109 is used to drive the fan 111.

[0031] In these alternative embodiments, outside air is drawn in by fan 111 and flows sequentially through the second heat exchanger 104 and the first heat exchanger 102 as a cold side to cool the airflow that has been compressed and heated by the first compressor 101 and the second compressor 102. Fan 111 is driven by the second turbine 109, further improving energy utilization and reducing engine power consumption.

[0032] In some alternative embodiments, the output port of the first turbine 108 is connected to the second compressor 103, and the output function of the first turbine 108 is used to drive the second compressor 103 to operate.

[0033] In these alternative embodiments, the second compressor 103 is driven by the first turbine 108, which eliminates the need to consume engine power and reduces the vehicle's fuel consumption.

[0034] In some alternative embodiments, the automotive air conditioning system 100 further includes a three-way valve 30, including a first port 301, a second port 302 and a third port 303, wherein the outlet of the second turbine 109 is connected to the first port 301, the outlet of the third turbine 205 is connected to the second port 302, and the third port 303 is used to connect to the vehicle's cockpit 200.

[0035] In these alternative embodiments, a three-way valve 30 is provided to collect and mix the two streams of cold air generated by the air circulation refrigeration system 10 and the waste heat recovery system 20, and then supply them to the vehicle's cockpit 200.

[0036] In some alternative embodiments, the automotive air conditioning system 100 further includes a first flow valve and a second flow valve. The first flow valve is located between the outlet of the second turbine 109 and the first port 301 and is used to control the air flow rate of the first port 301. The second flow valve is located between the outlet of the third turbine 205 and the second port 302 and is used to control the air flow rate of the second port 302.

[0037] In these alternative embodiments, the airflow from the air circulation cooling system 10 to the three-way valve 30 is controlled by the first flow valve, and the airflow from the waste heat recovery system 20 to the three-way valve 30 is controlled by the second flow valve. The airflow through the first and second flow valves can be adjusted, thereby adjusting the mixed airflow ratio of the air circulation cooling system 10 and the waste heat recovery system 20 at the three-way valve 30. Since the airflow temperature at the outlet of the waste heat recovery system 20 is higher than that at the outlet of the air circulation cooling system 10, the airflow temperature supplied to the vehicle's passenger compartment can be adjusted by adjusting the mixed airflow ratio.

[0038] To further illustrate the automotive air conditioning system 100 of this application, the following embodiments are provided:

[0039] The environmental parameters, vehicle parameters, and gas flow rates given in the embodiments are shown in Table 1 below:

[0040] Ambient temperature (°C) 40 Ambient air pressure (Pa) 101325 <![CDATA[Moisture content of the external environment (g / kg 干 )]]> 22 Vehicle thermal load (kW) 10 Target temperature in the car cab (°C) 26 Vehicle exhaust temperature (°C) 600 Vehicle exhaust flow rate (kg / s) 0.586 Airflow rate (kg / s) of the air circulation refrigeration system 0.3 Fan air intake flow rate (kg / s) 0.6 Air flow rate (kg / s) of waste heat recovery system 0.7

[0041] Table 1

[0042] The parameters of each component of the air circulation refrigeration system 10 and the waste heat recovery system 20 given in the embodiment are shown in Table 2 below:

[0043] Efficiency of the first heat exchanger 102 0.85 Efficiency of the second heat exchanger 104 0.90 Efficiency of Regenerator 105 0.70 Efficiency of condenser 106 0.70 Efficiency of water separator 107 0.95 Efficiency of the first compressor 101 0.80 Pressure ratio of the first compressor 101 3.00 Efficiency of the second compressor 103 0.80 Pressure ratio of the second compressor 103 1.99 The efficiency of the first turbo 108 0.84 The expansion ratio of the first turbine 108 4.30 The efficiency of the second turbine 109 0.84 The expansion ratio of the second turbine 109 1.18 The power ratio of fan 111 0.10 Efficiency of the third compressor 203 0.80 Pressure ratio of the third compressor 203 4.00 The efficiency of the third turbo 205 0.80 The expansion ratio of the third turbine 205 3.90 Efficiency of waste heat recovery heat exchanger 204 0.90

[0044] Table 2

[0045] Using the above parameters, the automotive air conditioning system 100 provided in this application embodiment is calculated to obtain the following parameters:

[0046] The gas supply pressure is 101525 Pa, which has a margin of 2 kPa compared to the external atmospheric pressure.

[0047] The gas supply temperature is -7.16℃, and the cooling capacity can reach 10kW at a gas supply flow rate of 0.3kg / s.

[0048] The moisture content of the entrained air is 22.00 g / kg. 干The moisture content of the supplied gas is 1.33 g / kg. 干 The system reached 20.67 g / kg 干 Dehumidification capacity.

[0049] The power consumption of the second compressor 103 is 29.63kW, and the power output of the first turbine 108 is 29.63kW, thus balancing the two.

[0050] The power consumption of fan 111 is 3.29kW, and the output power of the second turbine 109 is 3.29kW, thus balancing the two.

[0051] The power consumption of the first compressor 101 is 51.35kW, the power consumption of the third compressor 203 is 17.09kW, and the output power of the third turbine 205 is 84.88kW. The output power of the third turbine 205 can meet the simultaneous use of the first compressor 101 and the third compressor 203.

[0052] Based on the above calculations, this embodiment effectively utilizes the waste heat from the automobile engine exhaust gas, achieving a cooling capacity of 0kW and a yield of 20.67g / kg. 干 It achieves the required dehumidification capacity while maintaining a balanced power consumption without consuming additional power from the car engine.

[0053] Accordingly, a second aspect of this application provides an automobile, including the waste heat recovery and utilization automobile air conditioning system 100 of the first aspect embodiment described above.

[0054] The vehicle has the relevant structure of the waste heat recovery and utilization vehicle air conditioning system 100 of the first aspect embodiment mentioned above. The vehicle air conditioning system 100 provided in the above embodiments can be referred to, and it has all the beneficial effects of the aforementioned waste heat recovery and utilization vehicle air conditioning system 100. To avoid repetition, it will not be described again here.

[0055] The above description is merely a specific embodiment of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A waste heat recovery and utilization automotive air conditioning system, characterized in that, include: An air circulation refrigeration system includes, in sequence, a first compressor, a first heat exchanger, a second compressor, a second heat exchanger, a regenerator, a condenser, a water separator, a first turbine, a condenser, and a second turbine. The regenerator includes a first inlet, a second inlet, a first outlet, and a second outlet. The condenser includes a third inlet, a fourth inlet, a third outlet, and a fourth outlet. The outlet of the second heat exchanger is connected to the first inlet. The first outlet is connected to the third inlet. The third outlet is connected to the inlet of the water separator. The outlet of the water separator is connected to the second inlet. The second outlet is connected to the inlet of the first turbine. The outlet of the first turbine is connected to the fourth inlet. The fourth outlet is connected to the second turbine. The outlet of the second turbine is used to connect to the vehicle's cockpit. The waste heat recovery system includes a first motor, a generator, and a third compressor, a waste heat recovery heat exchanger, and a third turbine connected in sequence. The outlet of the third turbine is used to communicate with the vehicle's driver's cabin. The first motor is used to drive the third compressor. The output shaft of the third turbine is connected to the generator to drive the generator to generate electricity. The generator is connected to the first motor to drive the first motor to operate. The automotive air conditioning system also includes a three-way valve, comprising a first port, a second port, and a third port. The outlet of the second turbine is connected to the first port, the outlet of the third turbine is connected to the second port, and the third port is used to connect to the vehicle's cockpit.

2. The automotive air conditioning system according to claim 1, characterized in that, The air circulation refrigeration system further includes a second motor, which is connected to the first compressor and is used to drive the first compressor. The generator is connected to the second motor to drive the second motor to operate.

3. The automotive air conditioning system according to claim 1, characterized in that, The air circulation cooling system also includes a fan, which is used to draw in outside air so that the outside air flows sequentially through the second heat exchanger and the first heat exchanger.

4. The automotive air conditioning system according to claim 3, characterized in that, The fan is connected to the output shaft of the second turbine, and the output power of the second turbine is used to drive the fan.

5. The automotive air conditioning system according to claim 1, characterized in that, The output port of the first turbine is connected to the second compressor, and the output power of the first turbine is used to drive the second compressor.

6. The automotive air conditioning system according to claim 1, characterized in that, The automotive air conditioning system further includes a first flow valve and a second flow valve. The first flow valve is located between the outlet of the second turbine and the first port, and is used to control the air flow rate at the first port. The second flow valve is located between the outlet of the third turbine and the second port, and is used to control the air flow rate at the second port.

7. A car, characterized in that, The vehicle includes a vehicle air conditioning system that recovers and utilizes waste heat as described in any one of claims 1 to 6.

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