热泵余热回收技术的研究与发展

余热利用是目前被认为优先研究的领域之一,热泵的余热利用不仅提高了能源利用率,还减少了对环境的热污染。本文首先总结了目前国内研究较充分的余热回收热泵系统形式,并根据冷凝热回收利用程度对热回收系统进行分类。其次,讨论了热回收技术在热泵机组中的应用,围绕双冷凝器、相变蓄热及两级复叠技术展开余热回收的分析,阐述了不同热回收的原理及特点。随后,针对螺杆热泵热回收系统进行了探讨,在不同制冷剂和不同冷凝温度条件下,揭示了油冷却器的余热回收效果。本文所叙述及分析的内容,有利于促进热泵行业余热回收技术的推广应用,实现节能环保的效益。

Research and Development of Waste Heat Recovery Technology of Heat Pump

The utilization of waste heat is one of the prior research areas, and the waste heat utilization of heat pump not only improves the energy utilization, but also reduces the heat pollution to the environment. This paper firstly summarizes the types of well-studied heat pump systems which employ waste heat recovery, and classifies the heat recovery systems according to the degree of effective utilization of condensation heat recovery. Next, the application of heat recovery technology in heat pump unit is discussed, double condensers, phase change thermal storage and Two-stage overlap techniques are analyzed for the waste heat recovery, and the principles and characteristics of different heat recoveries are described. Afterwards, the paper explores the significant knowledge for the heat recovery system of screw heat pump, and the waste heat recovery effect of oil cooler is revealed while different refrigerants and condensing temperatures are employed. The contents described and analyzed in this paper are beneficial to promote the application of waste heat recovery technology in heat pump industry, and realize the benefits of both energy saving and environmental protection.