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首页> 外文期刊>Applied thermal engineering: Design, processes, equipment, economics >Non-azeotropic refrigerant charge optimization for cold storage unit based on year-round performance evaluation
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Non-azeotropic refrigerant charge optimization for cold storage unit based on year-round performance evaluation

机译：基于全年绩效评估的冷藏单元非共沸制冷剂充电优化

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摘要

This investigation aims at estimating a precise range of non-azeotropic refrigerant charge for medium temperature cooling application through performance test. A sample of cold storage unit originally charged R404A is slightly modified without changing the unit structure and components but adding a parallel thermal expansion valve for charging R407A and R407F. Charging tests are operated on the sample under 4 typical work conditions from high to low ambient temperatures to conduct annual performance evaluation with both unit performance and operation safety considered at the same time. Collecting performance parameters including CC, EER and PI, considering the feedback of sub-cooling degree, super-heating degree and DT and calculating the weight of these 4 working conditions in year-round operation contribute to the concluding recommended range of refrigerant charge and refrigerant mass range in liquid reservoir in cold storage unit charged R404A, R407A and R407F respectively.
机译：该研究旨在通过性能测试估计中温冷却施用的非共沸制冷剂充电的精确范围。 冷藏单元的样品最初充电的R404A略微修改，而无需改变单元结构和部件，而是增加用于充电R407A和R407F的平行热膨胀阀。 在4个典型的工作条件下，从高到低环境温度的典型工作条件下运行充电试验，以进行每种单位性能和操作安全性的年度绩效评估。 收集包括CC，EER和PI的性能参数，考虑到子冷却度，超级加热度和DT的反馈，并在全年运营中计算这4个工作条件的重量，有助于结束推荐的制冷剂充电和制冷剂 冷藏单位液体储存器中的质量范围分别充电R404A，R407A和R407F。

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