A Two-Factor Thermal Screen Control Strategy for Chinese Solar Greenhouses in High-Latitude Areas

Covering thermal screen on the front roof is one of most general methods to improve performance solar greenhouse in China. Thermal control, however, operator-dependent and based empirical strategies. In order more effectively manage screen, an optimal control method radiation temperature difference between indoor outdoor was established. The influence different factors systematically analyzed function calculated. formula established simulation which lasted for 62 days. As a result, two-factor can significantly air when controlled, it increase average by 0.53 °C. Comparing with difference, has greater impact screen. save 7.2% energy winter. research provide reference saving automatic Chinese greenhouse.