高温蒸汽是加热、清洗等工艺流程的重要原料，采用热泵-压缩机联合系统是制备小规模高温蒸汽的有效手段。基于此建立了一个带经济器和内部换热器的热泵-压缩机联合蒸汽发生系统数学模型，选用R245fa、R600和R601作为热泵循环的工质。分析了热源温度(60-80℃)、冷凝温度(110-130℃)和蒸汽发生侧给水温度(25-45℃)对系统性能的影响，另外还分析了系统的运行经济性与环境效益。结果表明，系统COP随热源温度的升高而升高，但随冷凝温度和给水温度的升高而降低，采用R601工质的系统COP最高，最大COP为2.59，相较于R245fa和R600分别提升了约3.4%和3.9%。单位耗功产汽量随热源温度和给水温度的升高而增大，随冷凝温度的升高而降低，其中使用R601工质的系统单位耗功产汽量最大，为3.57 kg/kWh。系统总功耗随热源温度升高而降低，随冷凝温度升高而升高。系统的运行经济性与燃煤锅炉相近，但明显优于燃气锅炉，环境效益优于燃煤锅炉。

High-temperature steam is an important raw material for heating, cleaning and other processes, and the use of a heat pump-compressor combined system is an effective means of generating high-temperature steam on a small scale. Based on this, a mathematical model of a heat pump-compressor combined steam generation system with economizer and internal heat exchanger was established, and R245fa, R600 and R601 were selected as the working fluids of the heat pump cycle. The effects of heat source temperature (60-80°C), condensing temperature (110-130°C) and steam generation side feed water temperature (25-45°C) on the performance of the system were analyses, in addition to the operating economy and environmental benefits of the system. The results show that the system COP increases with the heat source temperature but decreases with the condensing temperature and feed water temperature, and the system with R601 working fluid has the highest COP, with a maximum COP of 2.59, which is about 3.4% and 3.9% higher compared to R245fa and R600, respectively. The steam generation per unit of power consumption increases with the increase of heat source temperature and feed water temperature, and decreases with the increase of condensing temperature, in which the system using R601 working fluid has the largest steam generation per unit of power consumption, which is 3.57 kg/kWh. The total power consumption of the system decreases with the increase of heat source temperature, and increases with the increase of condensing temperature. The operating economy of the system is comparable to that of the coal-fired boiler, but significantly better than the gas-fired boiler, and the environmental benefits are better than those of the coal-fired boiler.

TK12

国家自然科学基金项目（面上项目，重点项目，重大项目）