不同通风方式的熵产数值模拟

Simulation Analysis of Entropy Generation in Different Ways of the Ventilation

利用热和流体流动控制方程,同时考虑了黏性耗散效应,以伴有温差的强迫对流空调房间为研究对象,分析讨论了不同通风方式在同一送风速度下熵产的分布情况。分析结果表明:熵产主要分布在送风口和回风口区域,最大熵产出现在送风口区域;模型1同侧上送下回通风方式的熵产的面积加权平均最小,模型3异侧下送上回通风方式的熵产的面积加权平均最大;无论哪种通风方式,在总熵产中,黏性熵产占绝对比重。

Based on the forced convection heat transfer driven by temperature difference in an air-conditioned room, by using governing equations of heat and fluidflow and considering the effect of viscous dissipation, the entropy generation distribution in different ways of the ventilation at the same velocity was analyzed. The results show that entropy generation mainly occurs on the inlet and outlet field, the maximum of entropy generation occurs on the inlet field, the weighted average of entropy generation area Sgen^· of the model 1 which is based on the fluid field of the same side in and out is the smallest, the weighted average of entropy generation area Sgen^· of the model 3 which is based on the fluid field of the different side in and out is the biggest, in any way of the ventilation, viscous entropy generation is dominant in total entropy generation.