空冷器板翅式传热元件翅片高度的优化计算

为了探究板翅式传热元件翅片高度对传热、压降的影响,以某装置冷却项目为工程实例,采用板翅式空冷器进行设计,应用数学解析方法,经计算比较,翅片高度为14 mm时,单台设备的传热系数与换热面积的乘积达到最大,节省投资;翅片高度为22 mm时,单台设备的空气侧单位压降的总传热系数最大,操作费用较低。翅片高度的选取需综合考虑初期设备投资和后期操作费用的关系。

Optimization Calculation of Fin Height of Plate Fin Type Heat Transfer Element Used in Air Cooler

To study how heat transfer and pressure drop were affected by fin height of plate fin type heat transfer element, in a specific cooling engineering, plate fin type air cooler and mathematics method were introduced. By computing and comparison we knew that when fin height was 14 ram, product of heat trans- fer coefficient and area in a single equipment was maximized and initial unit investment was reduced; when 22 ram, heat transfer coefficient per pressure drop in air side in a single equipment was maximized and operation cost was reduced. Fin height selection is related to initial investment and operation cost.