摘要
设计了适用于CO2热泵热水器的喷射器。分析了喷射器内部CO2流体压力、速度的变化趋势。建立了基于等压混合理论的喷射器模型,并对带喷射器的CO2热泵热水器系统进行热力学计算和火用损失分析。对带喷射器的热泵系统和带热力膨胀阀的传统热泵系统进行性能比较。考查了喷射系数、气体冷却器出口温度、蒸发温度等参数对系统制热系数的影响。
An ejector was designed for CO2-heat pump water heater. The distributions of pressure and velocity of CO2 fluid in the ejector is analyzed. A constant pres sure mixing model for ejcctor is e stablished to perform the thermodynamic model o fth e C 02-heat pump water heater The exergylosses of the system are analyzed, The results are compared to that o fa conventional system with an expansion valve. The effect on heating-COP for entrainment ratio, the re frigerant temperature at the gas cooler exit and evaporation temperature etc. is discussed.
出处
《工程建设与设计》
2013年第2期127-132,共6页
Construction & Design for Engineering
