叉-逆流空气-空气全热交换器的数值模拟
Numerical simulation of cross-counter flow air-air total heat exchanger performance
摘要：
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°。
Abstract：
Establishes a heat and moisture coupling transfer mathematical model between air and film, in which the moisture transfer is calculated by UDS. The model is implemented by Fluent software. Validates the model by comparing with the previous experimental results. Simulates and analyses the influence of the air supply angle on sensible heat and latent heat efficiencies and total pressure loss of dual ducts, and the influence of inlet air flow direction in the condition of different lengths of counter-flow section. Comprehensively considering the length of counter-flow section and inlet air flow directions of outdoor air and exhaust air, suggests that the length of counter-flow section is 400 mm and the inlet air flow directions of outdoor air and exhaust air are symmetrically installed at 135 degree or 45 degree with the symmetry axis of heat exchanger.
Keywords:cross-counterflow,air-airtotalheatexchanger,coupledheatandmoisturetransfer,sensibleheatefficiency,latentheatefficiency,totalpressureloss,lengthofcounter-flow