日前,板(ban)(ban)式换热(re)(re)器怎样进(jin)步传(chuan)热(re)(re)服(fu)从(cong)?冷热(re)(re)流(liu)体是(shi)通过换热(re)(re)器板(ban)(ban)片传(chuan)热(re)(re),流(liu)体与(yu)板(ban)(ban)片直接(jie)打仗,传(chuan)热(re)(re)方法为(wei)热(re)(re)传(chuan)导和对传(chuan)播(bo)热(re)(re)。进(jin)步板(ban)(ban)式换热(re)(re)器传(chuan)热(re)(re)服(fu)从(cong)的要害(hai)是(shi)进(jin)步传(chuan)热(re)(re)系数(shu)(shu)和对数(shu)(shu)均匀温差。
进(jin)步对(dui)数(shu)(shu)均(jun)匀(yun)(yun)温(wen)(wen)差:板式换(huan)热(re)器流型有逆流、顺(shun)流和(he)混(hun)淆(xiao)流型。在雷同工况(kuang)下,逆流时(shi)对(dui)数(shu)(shu)均(jun)匀(yun)(yun)温(wen)(wen)差最(zui)大,顺(shun)流时(shi)最(zui)小,混(hun)淆(xiao)流型介于二(er)者之(zhi)问。进(jin)步换(huan)热(re)器对(dui)数(shu)(shu)均(jun)匀(yun)(yun)温(wen)(wen)差的方(fang)法(fa)为尽大概接纳(na)逆流或(huo)靠近(jin)逆流的混(hun)淆(xiao)流型,尽大概进(jin)步热(re)侧(ce)流体的温(wen)(wen)度,低落冷(leng)侧(ce)流体的温(wen)(wen)度。
进步换(huan)热(re)(re)器传(chuan)热(re)(re)系(xi)数(shu)只有同时进步板片冷热(re)(re)两侧的外貌传(chuan)热(re)(re)系(xi)数(shu),减小(xiao)污垢层热(re)(re)阻,选用热(re)(re)导率高的板片,减小(xiao)板片的厚度,才气有用进步换(huan)热(re)(re)器的传(chuan)热(re)(re)系(xi)数(shu)。
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