翻译:two pass exchanger? 英文定义: most shell-and-tube heat exchangers are either 1, 2, or 4 pass designs on the tube side. this refers to the number of times the fluid in the tubes passes through the fluid in the shell. in a single pass heat exchanger, the fluid goes in one end of each tube and out the other(the above 2nd diagram). two and four pass designs are common because the fluid can enter and exit on the same side(the above 3rd diagram is for two pass). 中文解释: 管壳式换热器中,一种流体在管内流动(管程流体),而另一种流体在壳与管束之间从管外表面流过(壳程流体),为了保证壳程流体能够横向流过管束,以形成较高的传热速率,在外壳上装有许多挡板。视换热器端部结构的不同,可采用一个或多个管程。 若管程流体在管束内只流过一次,则称为单程管壳式换热器;若管程流体在管束内流过两次,则称为双程管壳式换热器, 在双程管壳式换热器中,隔板将封头与管板的空间(分配室)等分为二,管程流体先流经一半管束,流到另一分配室后折回再流经另一半管束,最后从接管流出换热器,如动画4-1所示。同样,若流体在管束内来回流过多次,则称为多程(如四程、六程等)换热器。 动画 : http:///hgx/hgyl/huagongyuanli/flash/sc/dsz%20cr/scgkshrq/scgkshrq-3.swf 查看更多