西北地区日光温室土墙厚度及其保温性的优化

Optimization of earth wall thickness and thermal insulation property of solar greenhouse in Northwest China

西北地区95%以上日光温室为土质墙体围护结构,各地温室墙体厚度差异较大。为寻求西北地区节能日光温室土质墙体的最佳厚度,对西北地区新疆维吾尔自治区塔城市、陕西省杨凌区、甘肃省白银市和宁夏回族自治区银川市等四省区应用面积最广的不同厚度土质墙体节能日光温室环境指标进行分析,研究墙体保温性能和传热特性。综合建造成本和土地利用率得出陕西杨凌地区的最佳厚度为1.0m,甘肃白银地区的最佳厚度为1.3m,宁夏银川地区的最佳厚度为1.5m,新疆塔城地区的最佳厚度为1.4m。这样的厚度在当地可以满足保温要求,当达到当地的最佳厚度时,再通过增加墙体厚度对提高温室室内环境温度效果不明显。

More than 95% Solar Greenhouse walls were built with earth in Northwest China, the thickness of the earth walls changed with areas. In order to find out the optimal earth wall thicknesses of Solar Greenhouse in the Northwest China, the study chose some earth wall of solar greenhouses used widely in the Northwest China from Tacheng City in Xinjiang Uigur Autonomous Region, Yangling Region in Shanxi Province, Baiyin City in Gansu Province and Yinchuan City in Ningxia Hui Autonomous Region. The environmental indexes of the regions were compared and analyzed, and the heat release at night and heat transfer characteristics were researched The results showed that the optimal thickness was 1.0 m in Yangling Region, 1.3 m in Baiyin City, 1.5 m in Yinchuan City and 1.4 m in Tacheng City, mainly based on the cost of construction and land utilization rate considered comprehensive. These thicknesses can meet the requirements of the local insulation property. It is not significant to increase the thermal insulation effect with again increasing the thickness when reached the optimization.