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本文介绍国内首次将机械加工表面多孔管(E管)用于大型空调机组前的整机试验。文章首先概述了近年来提出的四种关于多孔表面强化沸腾传热的机理和这次整机试验的社会背景。并报道了以氟利昂-12为工质的在2F10标准制冷量为14000千卡/小时的压缩机组中进行的E管蒸发器与低肋管蒸发器的整机试验结果。结果表明,E管用于制冷机组的满液式蒸发器十分合适,在设计工况下运行,与低肋管比较,热流密度提高36％,可节省换热面积26％左右。根据多孔管强化沸腾传热的机理及试验结果的分析,提出了有别于常规低肋管蒸发器结构设计的有益意见。整机试验结果为把这种管型用于大型制冷与空调机组的满液式蒸发器提供了设计依据。
This article describes the first domestic mechanical surface porous pipe (E tube) for large air-conditioning unit before the whole test. The article first outlines the four proposed in recent years on the porous surface enhanced boiling heat transfer mechanism and the social context of the machine test. And reported the whole test results of the E-tube evaporator and the low-fin tube evaporator using the Freon-12 as a working medium in a 2F10 standard refrigeration unit with a capacity of 14,000 kcal / hr. The results show that the E-tube flooded evaporator is very suitable for refrigeration units and runs at design conditions with a heat flux increase of 36% compared to low-fin tubes, saving about 26% of the heat transfer area. According to the mechanism and test results of enhanced boiling heat transfer of porous tube, some useful suggestions were proposed which are different from the conventional low-temperature tube evaporator design. The complete machine test results provide the design basis for using this type of tube for the full liquid evaporator of a large refrigeration and air conditioning unit.