【摘要】 本文着眼于采用蒸发式凝汽器代替传统发电系统凝汽器和冷却塔,以总传热系数αtot最大为目标函数,以总换热量和空气侧压降作为约束条件,以板间距Sa、高度H和长度L为优化变量对其进行了结构优化,编写了板壳蒸发式冷凝器的结构优化程序。优化结果表明,蒸发式凝汽器板间距的选择11～22.5mm,换热板高度0.7～1.6m,长度选择大于7m是合适的;本文优化结果为在L=8m,Sa=22mm,H=0.8m时总传热系数最大为578.3 W/(m2.℃);在总传热量一定的情况下,在影响板壳蒸发式凝汽器总传热系数的三个结构变量当中,敏感系数由大到小依次为L>H>Sa。更多还原

【Abstract】 The maximum heat transfer coefficient was present as the objective function,total heat exchange quantity and air-side pressure drop as constraint conditions,plate space Sa,height of plate H and length of evaporative condenser L as variables to optimize,composing the structural optimization process and providing reference to engineering design.The results show that suitable choise are plate spacing 11 ～ 22.5mm,plate height 0.7 ～ 1.6m,length more than 7m;when L = 8m,Sa = 22mm,H = 0.8m the heat transfer coefficient becomes the max of 578.3W /(m2.℃);when the the heat transfer cooefficient is constant,the sensitivity of coefficient is L > H > Sa。更多还原