| PERFORMANCE CHARACTERISTICS OF A SUPPLEMENTARY STACKCOOLING SYSTEM FOR FUEL-CELL VEHICLES USING A CARBON DIOXIDE AIR-CONDITIONING UNIT |
| S. C. KIM1, J. C. PARK2, M. S. KIM3 |
1Korea Automotive Technology Institute
2Hyundai-Kia Motors
3Seoul National University |
|
|
|
|
|
| ABSTRACT |
|
In fuel-cell-powered vehicles, the fuel-cell system requires a thermal-management subsystem to dissipate heat released during the reaction of hydrogen with oxygen. When the stack generates power at a high rate, a large amount of heat is also generated. If cooling by the radiator is insufficient, a supplementary stack-cooling system is needed to maintain a safe operating temperature. In this study, the performance of a CO2 air-conditioning unit for stack cooling was investigated under various conditions, and the relationship between cabin cooling and stack cooling was also studied. The coefficient of performance (COP) increased from 1.9 to 2.4, with an increase in cabin-air inlet flow rate from 0 to 8 m3/min. When the airconditioning unit was turned off, the cooling capacity of the stack cooler was increased; correspondingly, as the cabin-cooling capacity was increased, that of the stack cooler decreased. With an increase in ambient-air inlet temperature from 38 |
| Key Words:
Fuel-cell vehicle, Stack-cooling system, Air-conditioning unit, Carbon dioxide, Coefficient of performance (COP) |
|
|
|
Preview
Full text via DOI
Download Citation 
Print 
