Effect of Evaporator Load on Heat Pump Operating Parameters and Performance

• 作者: Mohammed Kamil Saad Nazir
• 来源期刊: 能源与动力工程:英文版
• 学科: 工学
• 关键词: Heat PUMP EVAPORATOR COP REFRIGERATION CYCLE
• 年，卷（期）: 2019,（3）
• 页码范围: 124-129
• 页数: 6页
• 分类号: TK

摘要

This work investigates the impact of varying the evaporator load on the performance and parameter characteristics of a heat pump.A series of experiments have been done on a vapor compression cycle heat pump which is run with R134a.The evaporator in this system is a coil submerged in a water/glycol bath accommodated in a thermally insulated steel container.The load of the evaporator is changed through a heater in this bath with a capacity of 1.8 kW.The glycol bath is mixed through an electric stirrer.The results showed that system pressures and temperatures generally increase and then decrease after a certain heat load has been imposed.The same trend is for COP of the refrigeration system;hence there is an optimum load point to which the COP increases to a maximum and then starts to decline.This optimum point corresponds to the best efficiency of the system.