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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2007, Vol. 8 Issue (2 ): 6-    DOI: 10.1631/jzus.2007.A0197
    
Metal hydride work pair development and its application on automobile air conditioning systems
QIN Feng, CHEN Jiang-ping, ZHANG Wen-feng, CHEN Zhi-jiu
Institute of Refrigeration and Cryogenic Engineering, Shanghai Jiao Tong University, Shanghai 200030, China; Research Center, Zhejiang Yinlun Machinery Co., Ltd., Tiantai 317200, China
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Abstract  Aiming at developing exhaust gas driving automobile air conditioning systems, a hydride pair LaNi4.61Mn0.26Al0.13/ La0.6Y0.4Ni4.8Mn0.2 was developed working at 393~473 K/293~323 K/263~273 K. Property tests showed that both alloys have flat plateau slopes and small hystereses; system theoretical coefficient of performance (COP) is 0.711. Based on this work pair, a function proving automobile metal hydride refrigeration system was constructed. The equivalent thermal conductivities of the activated reaction beds were merely 1.1~1.6 W/(m∙K), which had not met practical requirement. Intermittent refrigeration cycles were achieved and the average cooling power was 84.6 W at 423 K/303 K/273 K with COP being 0.26. By altering cycling parameters, experiment data showed that cooling power and system COP increase with the growth of heat source temperature as well as pre-heating and regeneration time while decrease with heat sink temperature increment. This study confirms the feasibility of automobile metal hydride refrigeration systems, while heat transfer properties of reaction beds still need to be improved for better performance.

Key words： Metal hydride      Air conditioning      Reaction bed      Automobile      Coefficient of performance (COP)     
Received: 20 May 2006     
CLC:  TB6  
  TK91  
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QIN Feng, CHEN Jiang-ping, ZHANG Wen-feng, CHEN Zhi-jiu. Metal hydride work pair development and its application on automobile air conditioning systems. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2007, 8(2 ): 6-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2007.A0197     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2007/V8/I2 /6

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