A numerical investigation of a diffusion absorption refrigerator operating with the binary refrigerant for low temperature applications

A numerical investigation of a diffusion absorption refrigerator operating with the binary refrigerant for low temperature applications
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使用二元制冷剂进行低温应用的扩散吸收制冷机的数值研究

DOI:
10.1016/j.applthermaleng.2011.02.021
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发表时间:
2011-07
影响因子:
6.4
通讯作者:
[7] Wang Q., Gong L., Wang, J.P., Sun T.F., Cui K.
[7] Wang Q., Gong L., Wang, J.P., Sun T.F., Cui K.
中科院分区:
工程技术2区
文献类型:
--
作者:
[7] Wang Q., Gong L., Wang, J.P., Sun T.F., Cui K.

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本文研究了以R23/R134 a为工质、DMF为吸收剂、氦气为辅助气体的扩散吸收式制冷机。结果表明,在给定的发生温度、环境温度和热源温度下,系统的性能系数(COP)主要由系统压力、富液组成、精馏器的精馏效果和氦/混合工质比等参数决定。在给定的富液组成、精馏器的精馏效果和氦气与混合工质的比例下,当冷热工质的热容比在制冷剂循环器中达到总体匹配时,系统压力达到最佳,COP最大。详细研究了影响COP的因素,包括上述参数以及发生温度(110-160 °C)、环境温度(10-28 °C)和热源温度(−15至−45 °C)。二元制冷剂在DAR中的应用可以提供一种利用低品位热能获得−40 °C制冷温度水平的新途径,这对于电力短缺的低温应用非常有前途。
This paper investigated a diffusion absorption refrigerator (DAR) operating with the binary refrigerant R23/R134a, the absorbent DMF and auxiliary inert gas helium. The results show that the coefficient of performance (COP) is mainly determined by the following parameters at the specified generating temperature, ambient temperature and heat source temperature: system pressure, composition of the rich solution, rectifying effect of the rectifier and ratio of helium to the mixed refrigerant. The optimum system pressure corresponding to the maximum COP achieves when the heat capacity rates of the hot and cold working fluids reach an overall match in the refrigerant recuporator at the specified composition of rich solution, rectifying effect of the rectifier and ratio of helium to the mixed refrigerant. The factors that influence COP are investigated in detail, which include the above parameters as well as the generating temperature (110–160 °C), ambient temperature (10–28 °C) and heat source temperature (−15 to −45 °C). The application of binary refrigerant in the DAR can provide a new way to obtain the refrigerating temperature level of −40 °C using low-grade thermal energy, which is very promising to low temperature applications where the electricity is shorted.
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