在温室结构中引入光伏组件会对温室内部的光、热环境产生积极影响,为探究各季节屋顶光伏对温室内部环境的影响,获得最佳覆盖率,进而在改善光伏温室内光热环境的同时提高光伏发电量,建立温室内辐射得热模型并通过实验验证模型的准确性。结合所提出的光伏温室系统,对典型日下对某顶部面积为420 m2的光伏温室在不同光伏组件覆盖率下的室内辐照量、室内气温及光伏发电量进行模拟分析。结果表明,与不铺设光伏组件相比,光伏组件的覆盖率每增加12.5%,春分日、夏至日、秋分日、冬至日的室内辐照量分别降低2.79%、5.8%、2.90%、0.70%,白天室内气温分别降低1.19%、0.54%、0.49%、1.12%。通过对植物生长所需的光、温条件进行分析,得出各典型日的最佳光伏组件覆盖率分别为62.5%、50%、62.5%、25%。
Abstract
The introduction of PV modules in the greenhouse structure positively affects the light and heat environment of the greenhouse. In order to investigate the effect of rooftop photovoltaics on the internal environment of greenhouses in all seasons and to obtain the optimal coverage,improve the light and heat environment of the PV greenhouse while increasing the PV power generation,a radiative heat gain model in the greenhouse is developed in this paper, and the accuracy of the model is verified through experiments. Under different coverage rates of PV modules,the proposed PV greenhouse system is used to simulate the indoor irradiance, indoor air temperature and PV power generation for a greenhouse with a top area of 420 m2 on a typical day. The results show that for every 12.5% increase in PV module coverage compared to no PV modules, the indoor irradiation on the equinox, summer solstice, fall solstice, and winter solstice days was reduced by 2.79%, 5.8%, 2.90%, 0.70%, and daytime indoor air temperatures were reduced by 1.19%, 0.54%, 0.49%, and 1.12%, respectively.By analyzing the light and temperature conditions required of plant growth, the optimal PV module coverage rates for each typical day was 62.5%, 50%, 62.5%, and 25%, and the corresponding PV power generation was 222.80, 228.57, 224.00, and 36.05 kWh.
关键词
太阳能 /
光伏温室 /
辐射得热模型 /
覆盖率 /
光伏发电量 /
静态投资回收期
Key words
solar energy /
photovoltaic greenhouse /
radiant heat gain model /
coverage /
photovoltaic power generation /
static payback period
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基金
国家重点研发计划（2021YFE0194500）; 北京市自然科学基金（3222042）
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