摘要
大型冷水机组的蒸发器型式主要有满液式蒸发器、干式蒸发器和降膜式蒸发器三种。目前以干式蒸发器的作为蒸发器的冷水机组控制最为成熟,应用最多。干式蒸发器由节流装置直接控制液体制冷剂进入蒸发器铜管,制冷剂液体在管内完全转变为气体,而被冷却的介质则在铜管外流动。如果系统水阻力过大,流动会过慢,换热效率降低;如果水阻力过小,流动过快,同样降低换热效率。影响干式蒸发器水阻力的因素很多,分析各种因素的变化,就容易系统地优化干式蒸发器水阻力所产生的影响。
Large-scale water chilling unit evaporator mainly has three kinds, which are full liquid type evaporator, dry evaporator, and falling-film evaporator. The control of water chiller with dry type evaporator is the most mature, and has the most applications at present. In dry typ e evaporator, liquid refrigerant is directly controlled by throttling gear, and then enters into copper pipe. The refrigerant liquid is totally transformed into gas in the pipe, and the cooling medium flows outside the cooper pipe. If the system water resistance is too large, velocity is slow, heat exchange efficiency will be reduce; and if the system water resistance is too small, velocity is fast, heat exchange efficiency will also be reduced. There are many factors that influence the water resistance of dry type evaporator. Through analyzing the changes of these factors, the effects caused by water resistance of dry type evaporator are easily systematically optimized.
出处
《日用电器》
2016年第11期42-46,51,共6页
ELECTRICAL APPLIANCES
关键词
干式蒸发器
制冷剂液体
水阻力
dry evaporator
refrigeration liquid
water resistance
