Numerical simulation of cross-counter flow air-air total heat exchanger performance

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.