日光温室土质墙体内温度与室内气温的测定分析

为研究日光温室土质墙体的保温性及室内温度环境特征,对日光温室的后墙、地面、空气进行了不同层次的温度监测和理论分析.结果表明:日光温室后墙在传热过程中,由内向外随墙体厚度的增大传入热量逐渐减少.在后墙垂直方向内表层0.2 m处,墙体中下部温度最高,顶部和基部温度较低;3月份一日内墙体表面温度平均比地表面温度高3.3℃;夜间放热时间比地面长约3 h,且单位面积墙体比单位面积地面放热多.白天,在温室南北方向由北向南气温逐渐增高;垂直方向气温由下到上逐渐升高;夜间,在南北方向由北向南气温逐渐降低,垂直方向气温没有明显变化.无论白天夜间,日光温室内南北方向气温差异比垂直方向气温差异大.

Determination and Analysis of the Temperature in Soil Wall and Solar Greenhouse

In order to study the thermal insulation property of soil wall and the characteristics of temperature in solar greenhouse, the experiment monitored and theoretically analysized the temperature that in the back wall, on land surface and in the air at different levels. The result showed that in the process of heat-transferring, with the increase of the thickness of the back wall, the heat reduced gradually from the inside to the out. In vertical direction 0. 2 m on surface layer, the lower part of the back wall has the highest temperature, while the top and the base part have a comparatively low temperature. The average temperature on the surface wall during a day in March is 3. 3℃ higher than that of land surface, and the heat transfer duration of the wall is about 3 hours longer than that of the land surface at night, and per unit wall area releases more heat than that of land surface. During the day, the temperature rises from north to south in north and south direction, while in vertical direction, the temperature rises gradually from bottom to top. During the night, the temperature decreases from north to south in north and south direction, and there is no obvious change in vertical direction. Regardless of daytime and at night, the temperature difference in the north and south direction is bigger than that in the vertical direction in the greenhouse.