应用R236fa作为制冷剂的喷射制冷系统性能分析

分析了R236fa工作介质的特点,研究了其作为喷射制冷系统制冷剂的适用性.通过对系统的热力学分析计算,比较R141b、R123、R134a和R236fa作为喷射制冷系统制冷剂的工作特性,得出了R236fa作为喷射制冷系统工作介质的优点和特点.给出了以R236fa作为制冷剂的喷射制冷系统在不同工作条件下的运行性能.重点分析了以R236fa作为工作介质的喷射制冷系统的泵功率、COP和喷射器关键几何尺寸.当系统制冷量为1 000kW时,最大泵功率仅为58kW,混合室直径仅为152 mm,COP最大可达到0.35.研究结果表明,以R236fa作为制冷剂的喷射制冷系统具有更好的经济性,并且在大型化制冷系统的设计、加工和制造中具有明显的优势.

Performance analyses of ejector refrigeration system with R236fa

The characteristics of R236fa and its feasibility as refrigerant of ejector refrigeration system are studied. Through the thermodynamic analyses on the ejector refrigeration system, the operation efficiencies with R141b, R123, R134a and R236fa as working fluid respectively are compared, and the advantages and characteristics of R236fa as refrigerant in ejector refrigeration system are drawn. The operation system performance of the ejector refrigeration system with R236fa in different working conditions is analyzed, and the pump power consumption, the COP and the ejector critical geometric dimensions are analyzed. When the cooling capacity of system is 1 000 kW, the maximum pump power is 58 kW, the diameter of the mixing chamber is 152 mm, COP reaches 0.35 maximally. The research results show that the ejector refrigeration system with R236fa has better economical benefits and outstanding advantages in the design and manufacture of the large-scale refrigeration system.