237-喷射式高温热泵节能循环系统研究.pdfVIP

喷射式高温热泵节能循环系统研究1 * 杨兴洋 ，曹雪臣，马致远，王金羽，管可立 南京工业大学 摘 要：随着人们生活水平的提高，电冰箱、空调、冷水机组和热泵等压缩式制冷设 备的使用日益广泛。与此同时，大量使用压缩制冷设备带来的能耗呈持续上升趋势，从而 加重了电网的负荷，因此，提高压缩式制冷设备系统效率、优化系统设计、节约能源、降 低成本，已成为压缩式制冷循环系统发展的当务之急。以此为目的提出一种喷射式高温热 泵节能系统，并且建立一种恒压两相喷射模型，研究工质成分和工作条件的影响。本模型 选择使用 R134a 与 R143a 组成的混合工质，结果表明，R134a/R143a 的组分为 0.9/0.1 时， 系统的 COP 最大为 2.11，且在 R134a 与 R143a 混合比为 0.9/0.1 的条件下，喷射式高温热 泵系统的 COP 与压缩式高温热泵系统的 COP 相比提高了 22.83%。 关键词：喷射式制冷循环；非共沸工质；引射率；两相喷射器 The ejector-expansion heat pump cycle system of high temperature Yang Xingyang, Cao Xuechen, Ma Zhiyuan, Wang Jinyu,Guan Keli School of energy science and engineering,Nanjing Tech University Abstract: With the improvement of peoples living standard, the use of refrigeration equipment such as refrigerators, air conditioners, chillers and heat pumps is becoming more and more widespread. Extensive use of compression refrigeration equipment, meanwhile, the rising trend of energy consumption, thus increase the load of power grid, therefore, improve the efficiency of compression refrigeration equipment system, optimization of system design, save energy, reduce cost, has become the priority of compression refrigeration cycle system development. In this paper, an energy saving system for high temperature heat pump is proposed for the purpose of this paper, and a constant pressure two-phase injection model is established to study the effects of the composition and working conditions of the two phases.This model chooses to use R134a and R143a mixed working medium,The simulation results show that the maximum of COP 2.11 in the high-temperature condition of R134a and R143a in the high temperature of 0.9/0.1 mixing, and the COP of ejector-expansion heat pump system is 22.83% higher than COP of compression heat pump system. Key words: ejector refrigeration cycle ；zeotropic mixtures ；ejector rate ；two-phase ejector 0 引 言 热泵技术作为一种节能技术, 能够提供比驱