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Studies on the Performance Characteristics of an Electronically Controlled $CO_2$ Air Conditioning System for Fuel Cell Electric Vehicles  

Kim, Sung-Chul (Thermal Management Research Team, KATECH)
Lee, Dong-Hyuk (Thermal Management Research Team, KATECH)
Lee, Ho-Seong (Thermal Management Research Team, KATECH)
Won, Jong-Phil (Thermal Management Research Team, KATECH)
Lee, Dae-Woong (Halla Climate Control Corporation)
Lee, Won-Suk (Doowon Climate Control Corporation)
Publication Information
Transactions of the Korean Society of Automotive Engineers / v.16, no.2, 2008 , pp. 150-157 More about this Journal
Abstract
The main objective of this paper is to investigate the performance characteristics of a $CO_2$ air conditioning system for fuel cell electric vehicles (FCEV). The present air conditioning system for FCEV uses the electrically driven compressor and electrically controlled expansion valve for $CO_2$ as a working fluid. The experimental work has been done with various operating conditions, which are quite matching the actual vehicle's driving conditions such as different compressor speed and high pressure to identify the characteristics of the system. Experimental results show that the cooling capacity and coefficient of performance (COP) were up to 6.3kW and 2.5, respectively. This paper also deals with the development of optimum high pressure control algorithm for the transcritical $CO_2$ cycle to achieve the maximum COP.
Keywords
Fuel cell electric vehicles; Air conditioning system; Transcritical $CO_2$ cycle; Electrically driven compressor; Coefficient of performance;
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