| Title |
A Study on the Performance Characteristics of a Heat Pump System using Stack Wast Heat in Fuel Cell Vehicles |
| Authors |
Byungyong Jeon ; Wonbin Ko ; Youn Cheol Park |
| DOI |
http://dx.doi.org/10.6110/KJACR.2016.28.8.325 |
| Keywords |
열펌프시스템 ; 공기 예열기 ; 판형 열교환기 ; 자동차공조기 Heat pump system ; Air pre heater ; Plate heat exchanger ; Mobile air conditioner |
| Abstract |
This study was conducted to develop a heating system for a fuel cell-driven electric vehicle. The system consists of a compressor, an expansion device and three heat exchangers. A conventional air source heat exchanger is used as primary heat exchanger of the system, and an additional water source heat exchanger is used as a pre-heater to supply heat to the upstream air of the primary heat exchanger. On the other hand, the third heat exchanger consists of a water-to-refrigerant heat exchanger. The heat source of the pre-heater and the water-refrigerant heat exchanger is the waste heat from the fuel cell's stack. In the experiment, the indoor and the outdoor air temperature were fixed, and the compressor speed, EEV opening and waste heat temperature were varied. The results indicate that the COPh of the proposed system is 3.01 when the system is operating at a 1,200 rpm compressor speed, 50% EEV opening, and 50℃ waste heat source temperature in air pre-heater operation. However, when the system uses a water-refrigerant heat exchanger, the COPh increases to up to 9.42 at the same compressor speed and waste heat source temperature with 75% EEV openings. |