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一、试验目的从测试日本HAU-10D型溴化锂吸收式制冷机的传热效率知道,它比国内同类机器要高出很多,其中冷凝器尤为突出,其传热系数K竟达4600大卡/米~2时℃左右,而国产同类型机器的传热系数最高仅为它的一半。根据这一情况,为了进一步摸清日本机器高效率的原因,我们进行冷凝器单管传热对比试验,将日本机器的管子与国产铜管在相同工况下作单管传热系数的比较。同时,我们又摸索了管子表面处理的工艺,对国产铜管表面进行了脱脂钝化处理,比较它们的传热效果,从而可以得出日本管是否进行了表面处理及表面处理对传热
First, the purpose of the test From the test of Japan HAU-10D lithium bromide absorption chiller heat transfer efficiency, it is much higher than similar domestic machines, including the condenser is particularly prominent, the heat transfer coefficient K actually reached 4600 kcal / m ~ 2 when the temperature around, while the domestic heat transfer coefficient of the same type of machine up to only half of it. According to this situation, in order to further understand the reasons for the high efficiency of the Japanese machine, we conducted a condenser single tube heat transfer comparison test, the tube of Japanese machines and domestic copper tubes in the same conditions for single-tube heat transfer coefficient comparison. At the same time, we also explored the pipe surface treatment process, the domestic brass surface degreasing passivation treatment, compare their heat transfer effect, which can be drawn Japanese tube whether the surface treatment and surface treatment of heat transfer