School of Mechanical Engineering, Yeungnam University, Gyeongsan, Gyeongbuk, South Korea.
Key Laboratory of High-efficiency and Clean Mechanical Manufacture, National Demonstration Center for Experimental Mechanical Engineering Education, School of Mechanical Engineering, Shandong University, Jinan, Shandong, China.
Environ Sci Pollut Res Int. 2022 Nov;29(52):78414-78428. doi: 10.1007/s11356-022-21263-1. Epub 2022 Jun 11.
Increasing CO emission due to the practicing of high global warming potential (GWP) refrigerant like R22 in split air conditioning (AC) units needs the best substitute to match with environment and safety protocols along with good energy efficiency. In this study, 14 alternative refrigerants have been chosen to replace R22 in a 1.5 TR capacity of split AC from the existing studies. The performance of each refrigerant has been analysed thermodynamically and compared their results with R22 by accounting for discharge temperature, power consumption, coefficient of performance (COP), total equivalent warming impact (TEWI) index, and life-time cost. Overall from this theoretical analysis, it was observed that the best refrigerant for each considered measure is not unique; for example, R290 was best in terms of refrigerant charge and discharge pressure, while R444B was chosen to be superior in terms of COP, TEWI, and life-time cost. Therefore, a multi-criteria decision-making methodology tool-based optimization has been carried out for selecting a single superior refrigerant for the future by considering thermal properties, COP, TEWI, and life-time cost. Results of the evaluation based on the distance from average solution envisage R290 and R1123 as superior and worst choices to replace R22.
由于在分体式空调 (AC) 机组中使用全球变暖潜能值 (GWP) 较高的制冷剂，如 R22，导致 CO 排放量增加，因此需要找到最佳替代品，以满足环境和安全协议以及良好能效的要求。在这项研究中，从现有研究中选择了 14 种替代制冷剂来替代 R22 在 1.5 TR 容量的分体式 AC 中的应用。对每种制冷剂的性能进行了热力学分析，并通过考虑排放温度、功耗、性能系数 (COP)、总等效变暖影响 (TEWI) 指数和生命周期成本，将其结果与 R22 进行了比较。总体而言，从理论分析来看，对于每种考虑的措施，最佳制冷剂并不唯一；例如，在制冷剂充注和排放压力方面，R290 是最佳的，而在 COP、TEWI 和生命周期成本方面，R444B 则被选为最佳的。因此，通过考虑热性能、COP、TEWI 和生命周期成本，采用基于多准则决策方法的工具对未来的单一优越制冷剂进行了优化选择。基于平均解距离的评估结果表明，R290 和 R1123 是替代 R22 的优越和最差选择。
