| 摘要: |
| 针对日光温室墙体保温性不理想，基建周期长和建造成本高的问题，设计一种节能、环保的装配式异质复合墙体日光温室，温室由装配式钢骨架构成承重体系，墙体采用国家标准环保建材多层复合装配在钢骨架上。通过在石家庄地区进行试验，以当地常用黏土砖+酚醛板复合墙体日光温室作对照，对热性能进行分析。结果表明:试验温室墙体热阻比对照温室高67.2%，传热系数低40.5%，墙体热惰性指标仅为对照温室的约1/3，北墙温度稳定区明显小于对照温室。与对照温室比，晴天和阴天试验温室北墙体日平均有效蓄热量分别低86.3%和94.7%，日放热效率分别高23.1%和97.7%；连续3 d晴天和连续3 d阴天试验温室室内平均气温分别高4.9和2.0 ℃，夜间室内最低气温分别高0.7和1.2 ℃；连续3 d晴天上午8:30—10:30试验温室平均升温速率高3.1 ℃/h；连续3 d阴天保温被闭合期间试验温室平均降温速率高0.13 ℃/h。与黏土砖墙日光温室比，装配式异质复合墙体日光温室墙体保温性优，冬季室内平均气温和夜间最低气温高，晴天上午升温速率快，可以满足喜温蔬菜的安全越冬生产，为日光温室的更新换代提供技术储备。 |
| 关键词: 日光温室 装配式 异质复合墙体 热工性能 蓄热 放热 |
| DOI：10.11841/j.issn.1007-4333.2023.04.15 |
| 投稿时间：2022-06-15 |
| 基金项目:河北省重点研发项目(21327208D)；河北省农林科学院科技创新专项课题(2022KJCXZX-JZS-5)；国家大宗蔬菜产业技术体系石家庄综合试验站项目(CARS-23-G05)；河北省第三批“巨人计划”——蔬菜科研创新团队项目 |
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| Thermal performance analysis and evaluation on solar greenhouse with assembled heterogeneous composite wall |
|
QIE Lijuan1,HAN Jianhui1,LI Yong2*
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| (1.Institute of Cash Crops, Hebei Academy of Agriculture and Forestry Sciences, Shijiazhuang 050051, China;2.Building Energy Efficiency and Green Building Research Institute, Hebei Academy of Building Research, Shijiazhuang 050021, China) |
| Abstract: |
| Aiming at the problems of the unsatisfactory thermal insulation of wall, long time infrastructure and high construction cost in existing solar greenhouse, a solar greenhouse with assembled heterogeneous composite wall, which was energy-saving and environment-friendly, was designed in this study. Steel skeleton was assembled as the load-bearing system, and the wall was assembled on the skeleton with environment-friendly building materials that meet national standards. By taking the solar greenhouse with wall composited clay brick and phenolic plate as the control, an experiment was conducted to study thermal performance on the solar greenhouse with assembled heterogeneous composite wall in Shijiazhuang. The result showed that: The thermal resistance of the test greenhouse wall was 67. 2% higher and heat transfer coefficient was 40. 5% lower than that of the control greenhouse. The thermal inertia index of the test greenhouse wall was only about 1/3 of that of the control greenhouse, and the temperature stability zone of the north wall in the test greenhouse was obviously smaller than that in the control. Compared with the control greenhouse, on sunny day and cloudy day, the average daily effective heat storage of north wall in the test greenhouse were respectively 86. 3% and 94. 7% lower, and the daily heat release efficiency were respectively 23. 1% and 97. 7% higher. In the test greenhouse, the average indoor temperature for 3 sunny days and 3 cloudy days were 4. 9 ℃ and 2. 0 ℃ higher, respectively, and the lowest indoor temperature in the night were 4. 9 ℃ and 2. 0 ℃ higher, respectively. From 8: 30 to 10: 30 in 3 sunny days, the average temperature rise rate of the test greenhouse was 3. 1 ℃/h higher, it could provide the optimal temperature for the planted tomatoes as soon as possible and increase the photosynthetic products. In the night of 3 cloudy days, the average temperature fall rate of the test greenhouse was 0. 13 ℃/h higher. In conclusion, in the solar greenhouse with assembled heterogeneous composite wall, the insulation ability of the wall is significantly better, the indoor average temperature and the lowest temperature at night are higher, temperature rise rate are better in the sunny morning, which could meet the safe winter production of warm season vegetables, and provide a technical reserve for the upgrading of the solar greenhouse. |
| Key words: solar greenhouse assembled heterogeneous composite wall thermal performance heat storage heat release |
