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蒸发冷却是目前较为完善的发射机冷却方式,它比水冷、风冷系统先进,具有电子管屏极单位面积散热功率大、电子管能承受过荷、设备与维护简单、受外部自然条件影响少、热能可以利用、改造旧设备比较简单易行等优点。几年来,各地已有不少较大功率的发射机由水冷系统改为蒸发冷却系统,但有些地方还未采用,已采用了蒸发冷却的地方,在维护上也还存在一些问题。为了满足当前广播事业发展的需要,本刊在这里刊登三篇关于蒸发冷却的文章,比较系统地介绍蒸发冷却的原理、设计计算以及改装、维护等问题。第一篇:《蒸发冷却与蒸发冷却电子管》,对蒸发冷却原理作了简要的介绍。第二篇;《150千瓦中波自动屏调发射机的水冷却系统改为蒸发冷却系统的改机报告》,1966年曾在《广播业务》增刊上登载过一部分,在设计计算和改装、维护方面作了较全面的介绍,这次重刊前请作者作了小部分修订。第三篇:《发射机蒸发冷却中的水冷、强制风冷和空气自然对流式冷凝器的选用和计算》,着重介绍蒸发冷却系统用的各种蒸汽冷凝器的设计计算和选用方法,作为对第二篇文章的补充。
Evaporative cooling is the more complete transmitter cooling method, it is advanced than water cooling, air cooling system, with a tube screen unit power dissipation, the tube can withstand overload, equipment and maintenance is simple, less affected by external natural conditions, heat Can use, transform the old equipment is relatively simple and so on. Over the past few years, many high-powered transmitters have been changed from water-cooled systems to evaporative cooling systems in various places. However, some places have not been adopted yet. Where evaporative cooling has been adopted, there are still some problems in maintenance. In order to meet the needs of the current broadcasting business, we published three articles on evaporative cooling here systematically introducing the principles of evaporative cooling, design and calculation, as well as modification and maintenance. The first: “evaporative cooling and evaporative cooling tubes”, the principle of evaporative cooling made a brief introduction. Second; “150 kilowatts medium wave automatic screen transmitter water cooling system to evaporative cooling system change machine report”, in 1966 in the “Broadcasting Business” supplement published on a part of the design calculation and modification, maintenance Made a more comprehensive introduction, the author before the re-publication made a small part of the revision. Third: “Evaporative cooling of water cooling, forced air cooling and air natural convection condenser selection and calculation”, focusing on the evaporative cooling system with a variety of steam condenser design calculation and selection methods, as a Supplement to the second article.