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为了研究冷冻水温度对双冷源制冷机组各部件和整个系统损的影响,本文构建以R32/R236fa(质量比:60%/40%)为循环工质的双冷源冷水机组分析模型,利用双冷源制冷机组实验平台进行多组实验,通过理论分析和实验分析对系统性能进行研究。研究了冷凝温度为32℃、高低温冷冻水分别为18℃/8℃、17℃/6℃等7组时,制冷机组的理论损和实验损的变化情况。结果表明:当高低温冷冻水出水温度分别为17℃和8℃、冷凝温度为32℃时,双冷源制冷机组的总损最小为0.68 k W。此时,损最大的为压缩机,约占总损的52.7%;其次为冷凝器,约占总损的17.4%。
In order to study the influence of chilled water temperature on the components and whole system damage of the dual cold source refrigeration unit, a double cold source chiller with R32/R236fa (mass ratio: 60%/40%) as the circulating fluid was constructed in this paper. Using multiple cold source refrigeration chiller experimental platforms to conduct multiple sets of experiments, theoretical analysis and experimental analysis were performed to investigate system performance. When the condensing temperature is 32°C and the high-low temperature chilled water is 18°C/8°C and 17°C/6°C, the theoretical damage and experimental damages of the refrigeration unit are studied. The results show that when the chilled water outlet water temperature is 17°C and 8°C, and the condensing temperature is 32°C, the total loss of the double cold source refrigeration unit is 0.68 kW. At this time, the compressor with the largest loss was about 52.7% of the total loss, followed by the condenser, which accounted for about 17.4% of the total loss.