Benefits investigation of electronic expansion valve in electric vehicle thermal system as compared to thermal expansion valve with shut-off valve
| Autor: | Xiaolu Li, Zhang Genxiang, Edwin J. Stanke, Sun Xiangli, Lu Yingchong, Rongrong Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Chiller
Materials science business.industry 020209 energy Mechanical Engineering 02 engineering and technology Building and Construction Safety shutoff valve 021001 nanoscience & nanotechnology Automotive engineering Flow control valve Refrigerant Thermal expansion valve Air conditioning 0202 electrical engineering electronic engineering information engineering Water cooling 0210 nano-technology business Evaporator |
| Zdroj: | International Journal of Refrigeration. 100:404-413 |
| ISSN: | 0140-7007 |
| DOI: | 10.1016/j.ijrefrig.2019.02.018 |
| Popis: | Typical electric vehicle thermal management system with air conditioning and battery cooling is introduced with different refrigerant flow control devices. Electronic expansion valve (EXV) and thermal expansion valve integrated with shut off valve (TXV+SOV) are adopted in such a dual evaporators cooling system as refrigerant flow control valve to investigate the benefits of EXV compared to TXV+SOV by testing. Test result shows the EXV has significant benefits of proper refrigerant distribution with less system fluctuation to avoid the dissatisfaction of customer. With the TXV+SOV control, due to mal-distributed refrigerant flow between air conditioner evaporator and battery chiller, air conditioner blow off temperature variation can reach 8 °C which will significantly affect the comfort of passenger cabinet. While with EXV control, air conditioner blow off temperature is very stable. Stable control of EXV also contributes to system efficiency improvement than the TXV+SOV by saving the energy up to 20%. |
| Databáze: | OpenAIRE |
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