平均有效传热温差Mn=T-t=M,-△ 理论传热温差Mn=T-T 总温差损失△=△+△"+△m △’=f·△。∫=0.0162 △"=T-TK P+ 2 0.5~1.5°C
平均有效传热温差 tm = T − t = t r − 理论传热温差 r T TK t = − 总温差损失 = + + C gl T T K P P r T f f pm m K = = − = + = = 0.5 ~ 1.5 2 0.0162 2 0