【摘要】 为明确砖墙日光温室结构蓄放热特点,为日光温室标准化设计提供指导,本研究监测分析砖墙日光温室热环境及结构的蓄放热特征。通过不同时段的监测分析得到以下结果:(1)砖墙日光温室0～20 cm深度的土壤为蓄热层,0～25 cm的墙体为蓄热层。(2)监测期间,单位面积的墙体和栽培面放热量为蓄热量的58.5%、42.8%。(3)白天日光温室的墙体和栽培面蓄热,夜间室内气温降低后逐渐向室内散热。监测期夜间,墙体和栽培面向室内放热量分别为3.5、6.9 MJ/m,通过前屋面、后屋面平均散失热量分别为10.7、2.3 MJ/m;蓄放热高于散热量为0.64 MJ/m。(4)日光温室外表面一直处于散热状态。在不考虑其他散热损失的条件下,前屋面、后屋面、后墙、侧墙在夜间(18:00—次日8:00)的散热分别占总散热量的76.1%、10.7%、11.5%、1.7%。通过以上结果分析,改善日光温室热环境应采用综合的工程方法,以控制整体建设成本,实现合理的蓄热保温。更多还原

【Abstract】 The paper aims to understand the thermal properties of Chinese solar greenhouse with brick wall(CSG-bw) and provide support for the standardized design of CSG. The temperature and heat flux of CSG-bw of different time were analyzed. The results showed that:(1) the soil of 0-20 cm and the brick wall of 0-25 cm were the heat storage layer in the CSGrelease per unit area for brick wall and soil was 58.5% and 42.8%, respectively;(3) the soil and wall of the CSG-bw could store heat during the day and release heat to the air indoor during the night, the released heat from the brick wall and soil to the indoor air was 3.5 and 6.9 MJ/m, respectively; the released heat from front and back roof to the outdoor was 10.7 and 2.3 MJ/m, respectively, but the released heat from wall and soil was0.64 MJ/m higher than the heat lost through front and back roof;(4) the external surface of CSGreleasing heat during the day, the ratio of heat released was 76.1%, 10.7%, 11.5% and 1.7% of the total heat released for the front, back roof, back wall and side wall at night, respectively, without considering other heat loss pathway. Base on the above results, it is proposed that the comprehensive engineering method should be used to improve thermal environment, which can reduce the cost of building of CSG-bw and store the heat reasonably.更多还原