空冷器环肋的熵最小化原理分析

Entropy Minimum Generation Analysis of Circular Fin for Air Cooler

运用熵最小化原理对空冷器正三角形排列换热管的环肋进行了优化,分析了迎面风速、管束宽度、换热管长度、管排数、翅片高度、翅片厚度、翅片密度以及管间距对其换热性能和电机功率消耗的影响。结果表明,低迎面风速、高薄翅片、高翅片密度、多管排数和较小的管间距造成的不可逆损失较小。这一分析结果也适用于其它类型翅片的优化设计。

Circular fin parameters for regular triangle arrangement tubes of air cooler are analyzed by EMG（entropy minimum generation） principle.The impact of face velocity,bundle width,tube length,tube rows,fin height,fin thickness,fin density and horizontal tube pitch on heat exchange performance and motor power are studied.The results show that lower face velocity,higher and thinner fin,higher fin density,more tube rows and smaller tube pitch can lead to less irreversible loss.The presentations of this paper is applicable for other type of fins optimization design.