农业光伏局地气候效应研究

罗小林; 罗久富; 罗忠新; 吴赛男; 隋欣

doi:10.19912/j.0254-0096.tynxb.2023-0133

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太阳能学报 ›› 2024, Vol. 45 ›› Issue (5) : 450-457. DOI: 10.19912/j.0254-0096.tynxb.2023-0133

农业光伏局地气候效应研究

罗小林^1,2, 罗久富^1,2, 罗忠新^1,2, 吴赛男^1,2, 隋欣^1,2

作者信息 +

AGROPHOTOVOLTAICS EFECTS ON LOCAL MICROAGROCLIMATE

Luo Xiaolin^1,2, Luo Jiufu^1,2, Luo Zhongxin^1,2, Wu Sainan^1,2, Sui Xin^1,2

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文章历史 +

摘要

光伏场区农林土地综合利用亟需探索局地气候（含农田小气候）特征与变化规律。利用光伏电站自动气象观测系统,基于1个自然年阵列下方种植区、阵列上方、场外对照区逐30分钟连续高精度气象观测数据,开展地-气-农林-光伏复合项目局地气候效应研究。结果表明：光伏阵列显著削弱阵列上方净辐射,阵列下方种植区白昼净辐射为负值,并以有效辐射形式损失热量;阵列下方种植区反照率为0.32~0.45,比场外对照区显著提高;光伏阵列具有增温、增湿作用,日均升温0.23 ℃,白昼升温最高达0.83 ℃,日均增湿2%;但是,阵列下方种植区秋季气温日较差降低可高达5.06 ℃,不利于作物有机质和糖分积累,因此农林复合型光伏土地综合利用需关注阵列下方农田小气候气温日较差的改善。采用静风频率定量识别光伏阵列对风场的影响,结果表明阵列下方和阵列上方静风频率分别比场外对照区提高50%和7%。上述研究成果可为农林复合型光伏项目土地综合利用提供科技支撑。

Abstract

The effects of agrophotovoltaics （APV） system on the local microclimate （e.g. field microclimate） are poorly understood although rapid increasing APV in the world. A meteorological observation system had be integrated for monitoring radiation and meteorological factors at three sites inside and outside of the PV plant （i.e. 1.5 m above the PV arrays inside, under the PV arrays inside, 100 m distance away outside PV station boundary as a reference site）. From October 2021 to September 2022, synchronization microclimate data at the three sites were continuously measured and collected at the interval of 30 minutes. Our results showed that during the day, PV arrays caused net radiation changed into opposite direction under the PV arrays and net radiation above the PV arrays weakened by 7% compared to the reference site. Specially, the albedo under the PV arrays was 0.32-0.45, bigger than that at the reference site. The PV arrays could promote air temperature and humidity. The daily air temperature under the PV arrays is averagely risen by 0.23 ℃ compared with the reference site. Further, air temperature change under the PV arrays could maximally rise up to 0.83 ℃ during the day. We also found the daily relative humidity under the PV arrays was up to 2.0% wetter than that at the reference site. However, the daily temperature range （DTR） under the PV arrays in autumn decreased by up to 5.06 ℃, possibly leading to less accumulation of organic matter and sugar in crops. These data provided evidence to support positive agricultural measures to avoid the narrowed DTR’s negative effect on the crops. The static wind frequency （SWF） was used as an indicator to identify PV arrays impact on the flow field. SWF under and above the PV arrays were 50% and 7%, both higher than SWF at the reference site, respectively. The results can provide technological support for the APV’s development and management.

导出引用

罗小林, 罗久富, 罗忠新, 吴赛男, 隋欣. 农业光伏局地气候效应研究[J]. 太阳能学报. 2024, 45(5): 450-457 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0133

Luo Xiaolin, Luo Jiufu, Luo Zhongxin, Wu Sainan, Sui Xin. AGROPHOTOVOLTAICS EFECTS ON LOCAL MICROAGROCLIMATE[J]. Acta Energiae Solaris Sinica. 2024, 45(5): 450-457 https://doi.org/10.19912/j.0254-0096.tynxb.2023-0133

中图分类号： TM615

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