恒壁温时管内强化传热性能的用经济分析

Exergy-economic Analysis of Enhanced Heat Transfer Performance through a Duct with Constant Wall Temperature

通过对管内受迫对流换热过程的经济分析，提出了一项管内强化传热性能评价指标：强化前后单位传热量，总传热费用比小分析结果表明，η不仅能反映采用强化传热措施后换热能力的改善和流动阻力的增大，而且能反映出强化传热管加工制造成本的增加。

Exergy-economic analysisk is carried out on con vection heat transfer through aduct with constant wall temperature, At the same time,η criterion which is defined as heat transferexpense ratio before and after heat transfer enhancement is recommended and employed to evaluatethe enhanced heat transfer performance through a duct.It is shown that η can illustrate not only theaugmentation heat transfer ability and the increase in flow resistan ce but also the increase in heattransfer tube cost after heat transfer enhancement is adopted.