论文部分内容阅读
建立了经由用户自定义标量(UDS)计算湿传递的空气-膜热湿耦合传递数学模型,利用Fluent实现模型计算。与前人实验结果的对比验证了该计算模型的准确性。模拟分析了送风角度对叉-逆流换热器显热效率、潜热效率及双风道压损总和的影响及逆流段长度变化时入流角度对换热器性能的影响。综合考虑逆流段长度与新风、排风入流角度设置问题,建议逆流段长度应设置为400 mm,新、排风入流方向关于换热器对称轴对称设置成135°或45°。
A mathematic model of air-film heat-moisture coupling transfer through the user-defined scalar (UDS) calculation was established. Fluent was used to calculate the model. Compared with previous experimental results, the accuracy of this model is verified. The effect of air supply angle on the sensible heat efficiency, latent heat efficiency and the total pressure loss of double air duct of the cross-flow heat exchanger was simulated and analyzed, and the effect of inflow angle on the heat exchanger performance was analyzed. Considering the length of the countercurrent section and the setting of fresh air and exhaust air inflow angle, it is suggested that the length of the counter current section should be set to 400 mm. The inflow direction of new and exhaust air is symmetrically set to be 135 ° or 45 ° with respect to the symmetry axis of the heat exchanger.