海水淡化用小型热泵系统的变工况分析

在某些特殊场合需要一种以维生为目的的小型海水淡化装置,热泵技术因其既能制冷又能制热,且高效节能的特点而被选用。这种小型的海水淡化热泵装置以3.6kg/h的淡水产出率为设计参数。针对不同的运行工况(冷凝温度和蒸发温度发生变化),计算了系统中各换热器的传热系数、适宜的换热器的面积和毛细管的长度。在这些数据基础上,分析了冷凝、蒸发温度和这些参数的关系,为完成小型海水淡化热泵系统的实际加工、装配和调试奠定了基础。

ANALYZING OF DIFFERENT WORKING CONDITIONS ON SMALL STYLE HEAT PUMPS WHICH ARE USED IN DESALINATION

In some special places, some small style desalinating units are needed for living, and heat pump may be considered to carry out it because of its efficiency and saving energy. For designing the small desalinating heat pumps system, it is a basic aim that the units can provide 3.6 kg pure water in an hour. According to different working conditions (condensation temperature and evaporation temperature being changed), heat transfer coefficient in heat exchangers and heat transfer area of heat exchangers are computed, besides of those, length of capillary tube is calculated too, and some relationships among condensation temperature, evaporation temperatures and those parameters are analyzed and presented. Those results are helpful to machining and assemble of the small desalinating heat pumps.