山东理工大学学报（自然科学版）2025，Vol.39Issue(5)：66-72,7.
喷气增焓型中高温热泵参数影响分析及优化
Parametric analysis and optimization of the vapor injection medium/high temperature heat pump
摘要
Abstract
Vapor injecting could effectively improve thermodynamic performance for heat pump with high temperature rise.The performance of medium/high temperature air-source heat pump using vapor injection need to be conducted.A simulation model of the vapor injection heat pump with an economizer is established to analyze influence of parameters(temperature,injection ratio)on cycle performance.Parameter optimization and comparative evaluation of three typical medium-and high-temperature working conditions are carried out under different cycle temperature spans.The results indicate that vapor injection could increase the heat rejection and COP of heat pump,but it has limited effect on reducing compressor exhaust temperature for isentropic working fluids.There exists an optimal branch evaporation temperature that maximizes the COP of the system.The optimal value is greatly influenced by the cycle temperature span and is less affected by the type of working fluid.The corresponding injection pressure is equivalent to the arithmetic square root of the cycle high and low pressures.Increasing the injection ratio is beneficial to improving cycle performance,but the maximum upper limit of the injection ratio is re-stricted by the heat transfer temperature difference of the economizer,and the type of working fluid and cycle temperature span have a significant impact on the maximum allowable injection ratio.The perform-ance improvement effect of vapor injection on large cycle temperature span is more significant.Under condensing temperature of 60℃ and 90 ℃,COP is improved by 4％and 16％for R1234ze(E),re-spectively.关键词
空气源中高温热泵/喷气增焓/喷气参数/优化分析Key words
air-source medium/high temperature heat pump/vapor injection/injection parameters/op-timization analysis分类
能源科技引用本文复制引用
邢佳婧,陈虎,李成宇..喷气增焓型中高温热泵参数影响分析及优化[J].山东理工大学学报（自然科学版）,2025,39(5):66-72,7.基金项目
山东省自然科学基金项目(ZR2022QE166) （ZR2022QE166）
山东省科技型中小企业创新能力提升工程项目(2022TSGC2262) （2022TSGC2262）
