Performance analysis of a diffusion absorption refrigeration cycle working with TFE―TEGDME mixture
Performance analysis of a diffusion absorption refrigeration cycle working with TFE―TEGDME mixture
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DOI：
10.1016/j.enbuild.2012.12.003
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发表时间：
2013-03
影响因子：
6.7
通讯作者：
Zhen Long;Yong-ming Luo;Huashan Li;X. Bu;W. Ma
中科院分区：
文献类型：
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作者：
Zhen Long;Yong-ming Luo;Huashan Li;X. Bu;W. Ma
TFE-TEGDME二元混合物具有良好的热物理性能，已被许多吸收式制冷机和热泵研究人员所研究。然而，以TFE-TEGDME为工质的扩散吸收制冷（DAR）系统的研究报道很少。本文数值研究了TFE-TEGDME在两种冷却介质，即水（32°C）和空气（35°C）的DAR系统中使用的潜力。研究发现，在吸收效率为0.8的情况下，风冷TFE-TEGDME雷达系统的最佳发电温度在170℃左右，相应的性能系数（COP）可达0.45。相比之下，水冷系统的性能更好，最佳发电温度在130℃左右，COP较高，达到0.56。参数化研究分析了冷却介质、产生温度、蒸发温度和吸收器效率对系统性能的影响。最后，比较了TFE-TEGDME和NH3-H2O两种DAR循环的COP和循环比。综上所述，TFE-TEGDME混合物是DAR循环的良好工质。
The binary mixture of TFE–TEGDME has good thermo-physical properties and been investigated by many absorption chiller and heat pump researchers. However, few studies have been reported on the diffusion absorption refrigeration (DAR) system using TFE–TEGDME as the working fluid. The present article numerically investigates the potential of TFE–TEGDME used in the DAR system with two cooling mediums, viz. water (32°C) and air (35°C). It is found that with the absorber effectiveness of 0.8, the optimum generation temperature for the air-cooled TFE–TEGDME DAR system is around 170°C, and the corresponding coefficient of performance (COP) is up to 0.45. In comparison, the performance of the water-cooled system is better with a lower optimum generation temperature around 130°C and a higher COP reaching 0.56. Parametric studies are also conducted to analyze the effects of the cooling medium, generation temperature, evaporation temperature and absorber effectiveness on the system performance. Finally, the performance of the TFE–TEGDME and NH3–H2O DAR cycles is compared in terms of the COP and circulation ratio. Overall, it can be concluded that the TFE–TEGDME mixture is a good working fluid for the DAR cycle.