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介绍了国外空调冷冻设备中采用的一种新型商用表面增强型蒸发强化传热管 ,并对其进行了实验研究。发现对使用R134a环保制冷工质 ,在低热流密度的条件下 ,表面增强型蒸发强化传热管具有十分优异的强化效果。在实验的换热工况下 ,保持进口水温不变而改变管内水流速 ,这种强化管的总换热性能是普通低翅蒸发强化管的 2 .2到 2 .6倍 ,管外换热系数是普通低翅蒸发强化管的 1.3～ 1.9倍。
Introduced a new type of commercial surface enhanced evaporative heat transfer tubes used in air conditioning refrigeration equipment in foreign countries, and carried out experimental studies. It is found that the use of R134a green refrigerant, at low heat flux density conditions, the surface enhanced evaporative heat transfer tube has a very good strengthening effect. In the experimental heat transfer conditions, to maintain the constant inlet water temperature to change the flow of water in the tube, the total heat transfer enhancement of this tube is ordinary low-wing evaporative tube 2.2 to 2.6 times the tube heat transfer The coefficient is 1.3 ~ 1.9 times of ordinary low-wing evaporative tube.