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制冷学报2006年第三期摘要

2007/7/19/12:09 来源:中国制冷学会

  关于中国制冷学会 》》

阀门控制的金属氢化物制冷系统的热力学分析

  摘 要:建立了阀门控制的金属氢化物制冷系统的动态性能模型,针对阀门控制的金属氢化物制冷系统,分析了热源温度、反应器的比热、氢化物与反应器质量比、传热系数等对系统动态性能的影响。结果表明:中温热源温度的增高将会降低COP、火用效率和制冷率;反应器的比热容对COP、火用效率和制冷率影响较小;增加氢化物与反应器质量比时COP、火用效率将增加,但制冷率将下降;增加传热流体与反应床表面的传热系数将会较明显提高COP、火用效率和制冷率。根据计算结果提出了改善系统动态性能的措施

  关键词:热工学;金属氢化物;制冷循环;热力学分析

Thermodynamic Analysis of Valve-Controled Metal Hydride Refrigeration System
Zhang Jipeng☆,Fu Qinsheng,Guo Xiaokun and Zhang Zaoxiao
☆ Xi'an Jiaotong University, Xi'an,710049, China
Abstract A dynamic model of performance analysis for valve-controlled metal hydride heat pumps was established. Computing simulation was used to explore the operation of valve-controlled metal hydride heat pumps. The effects of intermediate temperature, specific heat at constant pressure, mass ratio of hydride to the beds, and heat transfer coefficient on the dynamic performances were obtained. The results show that higher intermediate temperature will reduce both COP and cooling capacity, and specific heat at constant pressure of hydride beds can not affect COP and cooling capacity greatly. Moreover, improving mass ratio of hydride to the beds can improve COP but reduce the cooling capacity. Further, improving heat transfer coefficient can improve COP and cooling capacity significantly. On the basis of our computing results, some measures were proposed to improve the dynamic performance of the system.
Keywords Pyrologys; Metal hydride;Refrigeration cycle;Thermodynamic analysis
 

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