Simulation research on airflow distribution performance of solar greenhouse heating system in northwest China

Combined with the structure of solar greenhouse, this paper proposed a new type greenhouse heating and ventilation system framework as carrier ventilation. The system’s return air mode, tuyere type, installation position aperture ratio were determined by computational fluid dynamics (CFD). results showed that: 1) When inlet wind speed was 10m/s temperature 37°C, using upper method, average crop area increases 14.7°C, which greater than 1.3°C lower 2.3°C middle air, effect best. 2) Based on nozzle slot-type tuyere, five kinds outlets designed. It found that use nozzle-type outlet could promote circulation airflow in send more heat to area. 3) controlled at 1.5, number has little effect.