Analysis of alternatives to high GWP refrigerants for eutectic refrigerating systems
Analysis of alternatives to high GWP refrigerants for eutectic refrigerating systems
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DOI：
10.1016/j.ijrefrig.2017.01.024
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发表时间：
2017-04
期刊：
影响因子：
--
通讯作者：
L. Vaitkus;V. Dagilis
中科院分区：
文献类型：
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作者：
L. Vaitkus;V. Dagilis
欧盟第517/2014号法规将逐步淘汰R507 A和R404 A制冷剂，因为它们的GWP值很高。正在考虑不同的替代制冷剂，研究结果可用于各种应用。本文对共晶制冷系统的运行条件进行了分析。分析了替代制冷剂在低共熔系统中的适用性，重点是部件的性能和可用性，分析的替代品是碳氢化合物、CO2和HFC/HFO混合物。碳氢化合物将是一个很好的替代品，但所需的系统组件不可用。HFC/HFO混合物是可用系统组件的替代品。使用R448 A制冷剂的直接更换测试结果表明性能显著下降。在25 °C环境温度下，下拉时间增加了24%，功耗增加了9%。此外，由于下滑和较低的蒸发压力，改造后的系统不能达到所需的蒸发温度。
The EU Regulation No 517/2014 is going to phase-out R507A and R404A refrigerants because of their high GWP values. Different alternative refrigerants are under consideration, with the research results available for various applications. However, the eutectic refrigerating system operates at specific conditions, which are analysed in the paper. The applicability of the alternative refrigerants in the eutectic systems is analysed, focusing on performance and availability of components.The analysed alternatives are hydrocarbons, CO2and HFC/HFO mixtures. The hydrocarbons would be a good alternative, but the required system components are not available. The HFC/HFO mixtures are the alternative with the available system components. The drop-in replacement test results with R448A refrigerant demonstrate significant performance degradation. At 25 °C ambient temperature the pull-down time increased by 24% and the power consumption increased by 9%. Also, due to the glide and lower evaporation pressure, the retrofitted system cannot reach the required evaporation temperatures.