长三角地区集中式露地农业光伏方阵夏季光热环境试验研究

EXPERIMENTAL STUDY ON PHOTOTHERMAL ENVIRONMENT OFCENTRALIZED OPEN-FIELD AGRICULTURAL PHOTOVOLTAIC ARRAY INYANGTZE RIVER DELTA REGION IN SUMMER

基于太阳照度和环境温度逐时变化,以长三角地区的集中式露地农业光伏方阵为研究对象,在跨度为6.8 m的单跨方阵中沿从南到北的跨度方向取0.65、3.40、6.15 m处的3个和长度方向共面的测试断面,即南区、中区、北区。基于此,进行夏季方阵内外的光热环境测试,分析并明确光伏组件下方区域的光热环境变化规律,为其太阳能资源合理利用、结构改进和夏季农业生产管理提供参考。结果表明,该地区光伏方阵夏季内部3个区域光热环境呈现规律性差异,整体表现为北区略优于南区,中区优于南、北两区。综合考虑作物生长的光热环境需求,一方面可通过结构改进、种植方式优化等方式改善或利用好内部光环境;另一方面基于热环境规律,分类做好内部3个区的夏季灌溉等田间管理,从而推动光伏农业发展升级。

Based on the hourly variation of solar illuminance and ambient temperature,a centralized open-ground photovoltaic square in the Yangtze River Delta region is taken as the research object.In a single-span array with a span of 6.8 m,three test sections at 0.65,3.40 and 6.15 m were taken along the span direction from south to north,namely,the southern area,the middle area and the northern area.Based on this,the test of the photothermal environment inside and outside the square in summer was carried out.In addition,the aim of this study is to analyze and clarify the variation rule of the photothermal environment in the area below the photovoltaic modules,which provides reference for efficiently utilization of solar energy resources,structural improvement and agricultural production management in summer.The results show that the photothermal environment in the three areas of the photovoltaic array presents regular differences in summer,and the overall performance is that the central area is better than the other two areas,and the northern area is slightly better than the southern area.Considering the demands of photothermal environment for crop growth,on the one hand,the internal light environment can be enhanced by improving the structure of photovoltaic modules and optimizing the planting methods;On the other hand,based on the law of thermal environment,the field management such as summer irrigation in the three internal areas should be done according to classification,therefore to promote the development and upgrading of agrivoltaics.