Control And Simulation Of Greenhouse Temperature Environment In Cold Arid Regions

With the development of China's agricultural production, the large modern greenhouse has become an important means of nurturing vegetables, fruits, seedlings and saplings. In particular, the greenhouse plays the very important role in cold-arid areas whose weather conditions are disadvantage for agricultural production. Understanding temperature environment. It is of great significance to reducing energy consumption and improves plant production and quality.It summarize temperature changes along time and the vertical and horizontal distribution of temperature in Holland Venlo greenhouse of cold-arid areas by measuring and analyzing the temperature of different locations in automatic control greenhouse regularly during autumn rainy season. The results show that temperature in Greenhouse changes sharply during day and it becomes slow at night; the vertical temperature was a significant gradient distribution; and the horizontal temperature has a trend that the south temperature is lower than the north temperature. And the middle temperature is higher than the east and west one of the distribution trends. In the containable cloudy days. we can maintain a high temperature by raising it. It can be more uniform by using heat sink close the east,west and south of green house to raise the temperature. This study provide reference for the structural design of the greenhouse and optimal control for the greenhouse environment.