Traditional ventilation control decisions for Chinese Solar Greenhouses (CSGs) rely primarily on farmers’ empirical judgment. With the development of a novel ventilation system (comprising bottom vents, top vents, and back roof vents), farmers lack adequate practical experience in operating such systems. To evaluate the cooling performance of the new ventilation system in CSGs, a Wireless Sensor Network (WSN) system was established using multiple wireless temperature and humidity sensors. The Ordinary Kriging (OK) interpolation method, which was developed in LabVIEW, was employed to visualize and monitor the real-time air temperature distribution under various ventilation opening configurations and vent combinations. Additionally, the cooling amplitude and temperature uniformity were comparatively analyzed. The results indicated that the synergy of multiple vents could enhance the chimney effect, achieving efficient cooling in summer. The cooling amplitudes of the dual-vent combination (bottom vent+top vent) and the three-vent configuration were 7.1°C and 10.4°C, respectively. Increasing the ventilation area improved both the cooling effect and temperature uniformity, with more open vents and a larger top vent area offering additional benefits. The findings of this study can provide a theoretical reference for farmers to optimize greenhouse ventilation management and offer data support for the application of novel ventilation systems.

Solar greenhouses have been widely developed in China. Active heat storage walls using air ducts arranged in the walls can improve the walls' thermal performance and indoor temperatures of solar greenhouses. In the present work, three kinds of air duct layouts, namely straight-up-and-down duct (Z), fork-shaped top-in- bottom-out distribution duct (DF), and “±”-shaped top-in-side-out distribution duct (CF) are designed. The effect of the three air duct layouts on the heat transfer and storage characteristics of the back wall is studied using the computational fluid dynamics (CFD) method. Results show that after the same time period, the transferred heat amount in the back wall with duct DF is the largest, while that with duct CF is slightly greater than that with duct Z. The temperature of the back walls with air ducts is higher than that without air ducts. The air duct DF is the optimal among the three kinds of air duct layouts. The greenhouse with the duct DF in the back wall shows the most obviously increased indoor average temperature, the highest temperature at night, and the most uniform temperature.