相变蓄热蒸发型空气源热泵系统性能实验研究

发布时间：2018-04-26 01:21

  本文选题：空气源热泵 + 相变　； 参考：《太原理工大学》2013年硕士论文

【摘要】：热泵是最重要的节能技术之一,空气源热泵具有高效节能、使用方便和绿色环保的特点,在我国空气源热泵供热替代燃煤锅炉供热具有广阔的推广应用前景。然而传统的空气源热泵长期在低温环境下运行时会出现一系列问题,基于此本文开发设计了一种相变蓄热蒸发型空气源热泵系统。相变蓄热蒸发型空气源热泵系统与传统热泵相比增加了相变蓄热器装置,实现了热泵技术和相变蓄热技术的结合。在不同的环境工况下,本热泵系统可进行供热—蓄热模式、供热—放热模式和除霜—放热模式切换运行。在环境温度高于-5℃时,系统在供热—蓄热模式下运行,解决了传统空气源热泵供热过程中存在能量供需矛盾；环境温度低于-5℃时,系统在供热—放热模式下运行,增强了空气源热泵低温运行的安全性和经济性；当环境温度较低、蒸发器结霜时,系统在除霜—放热模式下运行,实现了相变蓄热快速高效节能除霜。为了研究相变蓄热蒸发型空气源热泵系统的性能特性,本文设计组装了一台相变蓄热蒸发型空气源热泵系统实验样机,并建设了模拟室外环境的移动冷库,对热泵系统在不同环境温度和不同模式下的运行特性进行了实验测试。测试结果显示：相变蓄热蒸发型空气源热泵系统在三种模式下运行时都具有优良的性能,在超低环境温度-25℃和-30℃下运行时,制热性能系数COP分别为2.0和1.94,制热量也基本能满足供热需求,同时压缩机排汽温度显著降低。实验研究结果表明,本相变蓄热蒸发型空气源热泵系统能够解决空气源热泵在供热过程中存在的能量供需矛盾,同时提高了空气源热泵在低温运行下的各种性能,它完全可以推广应用到环境温度较低的广大北方地区。
[Abstract]:Heat pump is one of the most important energy-saving technologies. Air source heat pump has the characteristics of efficient energy saving, convenient use and green environmental protection. It has a broad prospect of popularization and application in replacing coal-fired boiler heating with air-source heat pump heating in China. However, a series of problems will arise when the traditional air source heat pump is operated in low temperature for a long time. Based on this, a phase change heat storage evaporative air source heat pump system is developed and designed. Compared with the traditional heat pump, the phase-change heat storage evaporative air source heat pump system increases the phase change accumulator device, and realizes the combination of the heat pump technology and the phase change heat storage technology. Under different environmental conditions, the heat pump system can be operated in the heat supply-storage mode, the heat supply-release mode and the defrosting-heat-release mode. When the ambient temperature is higher than -5 鈩，

本文编号：1803855