基于板式蒸发器水蒸汽冷凝传热实验,对人字形板式蒸发器水蒸汽冷凝侧的传热和压降性能进行分析.使用两相流冷凝模型预测本文人字形板式蒸发器冷凝侧的换热性能,采用多元线性回归方法拟合得出人字形板式蒸发器水蒸汽冷凝换热实验关联式.实验得出沿单位长度人字形波纹板的压降随水蒸汽流速的增大不断增大;比较了几种人字形板式蒸发器水蒸汽冷凝侧压降模型,并拟合推导出摩擦因子与当量雷诺数的实验关联式.
The characteristics of heat transfer and pressure drop of the steam condensation in plate evaporator were analyzed based on experiment platform of the steam condensation test. The properties of heat transfer of steam condensation in herringbone plate evaporator were predicted by using the two-phase flow condensation model. A correlation of steam condensation heat transfer coefficient in herringbone plate evaporator was fitted by the multiple linear regression analysis method. Pressure drop per unit length along herringbone plate increased with the velocity of steam. Several pressure drop models of steam condensation in herringbone plate evaporator were compared. The experimental correlation between steam condensation friction factor and the equivalent Reynolds number was derived.