CAJ | 학술논문

在设计和搭建板式换热器实验台的基础上，选取具有Marangoni效应的混合蒸气，研究了人字形板式换热器（PHE）单流程不同流道、不同浓度凝结换热系数及流量和压降之间的关系。实验结果表明随着流道数量增加，流量分配不均匀现象越来越明显。在浓度为1%时，与纯水蒸气相比，其换热系数能提高25%。但随着浓度的增大，换热系数在一定的流量下，其换热系数甚至比纯水蒸气凝结时的换热系数要低。在压降方面，水侧的压降远大于气侧的压降，并且随着板片数的增多，对应的压降有所减小。
재설계화탑건판식환열기실험태적기출상，선취구유Marangoni효응적혼합증기，연구료인자형판식환열기（PHE）단류정불동류도、불동농도응결환열계수급류량화압강지간적관계。실험결과표명수착류도수량증가，류량분배불균균현상월래월명현。재농도위1%시，여순수증기상비，기환열계수능제고25%。단수착농도적증대，환열계수재일정적류량하，기환열계수심지비순수증기응결시적환열계수요저。재압강방면，수측적압강원대우기측적압강，병차수착판편수적증다，대응적압강유소감소。
This paper experimentally studied the effect of different channel and concentration on condensa-tion heat transfer coeffcient in herringbone plate heat exchanger, the relationship between flow and pressure drop was also done. The investigation was based on apparatus which was designed and set up, mixed vapor with Marangoni effect was chosen to carry out experiments. The results indicated that flow maldistribution was obvious increasingly with increasing flow. For low ethanol concentration (1%),the coeffcient could be augmented as much as 25%as compared with pure water vapor. Mixed vapor condensation of heat transfer coeffcient was even below than pure water vapor with increasing concentration under a certain flow. Water pressure drop was far more than vapor side. Moreover, corresponding pressure drop decreased when the number of plate increased.