Performance of a single-stage Linde-Hampson refrigerator operating with binary refrigerants at the temperature level of −60 °C
Performance of a single-stage Linde-Hampson refrigerator operating with binary refrigerants at the temperature level of −60 °C
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DOI：
10.1631/jzus.a0900208
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发表时间：
2010-01
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影响因子：
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通讯作者：
Qin Wang;K. Cui;T. Sun;Fusheng Chen;Guangming Chen
中科院分区：
文献类型：
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作者：
Qin Wang;K. Cui;T. Sun;Fusheng Chen;Guangming Chen
采用一种新的方法，在-60 °C温度水平下，对使用6种不同的二元制冷剂（R23/R134 a，R23/R227 ea，R23/R236 ea，R170/R290，R170/R600 a和R170/R600）的单级Linde-Hampson制冷机（LHR）进行了性能优化。在这些二元制冷剂中，R23摩尔分数为0.55和0.6的R23/R236 ea分别是最有希望用于中、低吸入压力压缩机的不燃工质。对于这两种压缩机，R170/R600的R170摩尔分数分别为0.6和0.65，是最有前途的低全球变暖潜能值的二元制冷剂。压力水平的优化结果表明，最佳的低压力值的性能系数（COP）时，最小的温差发生在热端和冷端的回热器在指定的组成和压力比。引入了单位回热熵产和回热量与压缩机功率消耗之比两个新的参数来分析回热器的（火用）损比。在本文中采用的新方法也表明了一个有前途的应用，甚至多组分制冷剂的性能优化。
The optimization of the performance of a single-stage Linde-Hampson refrigerator (LHR) operating with six different binary refrigerants (R23/R134a, R23/R227ea, R23/R236ea, R170/R290, R170/R600a and R170/R600) with ozone depletion potentials (ODPs) of zero was conducted using a new approach at the temperature level of −60 °C. Among these binary refrigerants, the 0.55 and the 0.6 mole fractions of R23 for R23/R236ea are the most prospective nonflammable ones for the medium and low suction pressure compressors, respectively. For these two kinds of compressors, the 0.6 and the 0.65 mole fractions of R170 for R170/R600, respectively, are the most prospective binary refrigerants with low global warming potentials (GWPs). The results of optimization of pressure levels indicate that the optimum low pressure value for coefficients of performance (COP) is achieved when the minimum temperature differences occur at both the hot and the cold ends of the recuperator at a specified composition and pressure ratio. Two useful new parameters, the entropy production per unit heat recuperated and the ratio of heat recuperating capacity to the power consumption of the compression, were introduced to analyze the exergy loss ratio in the recuperator. The new approach employed in this paper also suggests a promising application even to the optimization of the performance with multi-component refrigerants.