日光温室作物热环境模拟及分析

Simulation and analysis of the temperature inside the sunlight greenhouse

针对日光温室实际生产管理中的气象保障问题,该文从传热学的基本原理出发,考虑了温室内作物对热环境的影响,建立了日光温室内作物生长情况下的温度预测数学模型。将温室内部系统分为5个部分,建立了5个方程,联立方程组,运用高斯主元素消去法对方程组进行求解,对各个面的温度进行模拟,并对模拟结果进行了分析。用试验温室的实测资料对模拟结果进行了验证,结果表明所建模型模拟效果较好,室内气温的平均绝对误差为0.9℃,平均相对误差为5.1%,模拟的精确度较高,可以为温室生产管理提供科学的气象依据。本文还对模型模拟误差产生的原因进行了分析。

In order to provide meteorological factors for the typical sunlight greenhouse in Beijing areas, temperature was simulated inside sunlight greenhouse. According to the method of heat balance, taking the sunlight greenhouse crop into account, mathematics model was set up to simulate the temperature inside the greenhouse with crops inside. The whole space of the greenhouse was divided into five parts. Five equations were created and results of the equations were solved using Gauss main element elimination method. The temperature inside each surface in the greenhouse was simulated and the results were analyzed. The simulated results were good and .the mean absolute difference was 0.9℃and the mean relative difference was 5.1 percent. The simulated difference was also analyzed.