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农学学报 ›› 2019, Vol. 9 ›› Issue (5): 62-68.doi: 10.11923/j.issn.2095-4050.cjas18100014

• 农业工程 农业机械 生物技术 食品科学 • 上一篇    下一篇

砖墙日光温室结构传热特征的监测研究

张纪涛1, 李翠2   

  1. 1.山西省农业科学院现代农业研究中心;2.太原理工大学物理与光电工程学院
  • 收稿日期:2018-10-22 修回日期:2018-12-21 接受日期:2019-01-10 出版日期:2019-05-21 发布日期:2019-05-21
  • 通讯作者: 张纪涛 E-mail:zhangjitao_xn@126.com
  • 基金资助:
    山西省重点研发计划项目(一般项目)“山西省日光温室区域标准建构方案的研究”(201603D221036-2)。

Monitoring Thermal Properties of Brick Wall Solar Greenhouse

  • Received:2018-10-22 Revised:2018-12-21 Accepted:2019-01-10 Online:2019-05-21 Published:2019-05-21

摘要: 砖墙日光温室是重要的温室类型,但建设成本高、越冬性能不佳。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,本研究监测分析了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几个结果:(1)砖墙日光温室0~20cm深度的土壤为蓄热层;0~25cm的墙体为蓄热层;(2)栽培面和墙体在白天蓄热,在夜间室内气温降低后,逐渐向室内散热,但小于通过前后屋面散失的热量,测试期间散热比放热高0.64MJ.m-1;(3)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,即实现合理的蓄热保温。本研究对促进日光温室标准化的实现有重要指导作用,进而可以促进设施建设的向现代化、标准化方向发展。

关键词: 云南, 云南, 肯尼亚, 茶树品种, 红碎茶

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 CSG-bw; (2) during the monitoring, the ratio of heat storage to the heat release 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 frontand back roof to the outdoor was 10.7 and 2.3 MJ/m, respectively, but the released heat from wall and soil was 0.64 MJ/m higher than the heat lost through front and back roof; (4) the external surface of CSG-bw kept releasing 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.

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