摘要
建立日光温室室内光辐射环境模型,通过模拟不同设计方案的室内光环境,评价和选择合理的设计方案,是提高日光温室设计水平和技术性能的可行途径。建立了反映温室建设地点的地理方位、室外光辐射、温室朝向和建筑参数、屋面形状和覆盖材料等多种因素的日光温室光辐射环境模型,可以模拟任意时刻温室内各表面中的任意点的光辐射照度。采用针对日光温室内计算点,以光线逆向回溯的方法,建立了计算点与屋面日光入射点间的对应关系,进而确定计算点的直接光辐射;根据天空等辉度假设,采用计算点对屋面及室外可视天空的视角比例确定其散射辐射。该模型考虑了阴、晴各种天气条件对室内光辐射环境的影响;建立了室内直接辐射与散射辐射的模拟计算方法;模型中还考虑了透明覆盖材料的雾度对直射与散射光辐射影响等问题。对这些问题的处理使模型更加接近实际和更加准确。
Establishing inside light environment model in Chinese solar greenhouse is one of possible ways to improve a solar greenhouse design and technical performance, by simulating and evaluating inside light environment of different design schemes, and selecting the reasonable design scheme. A light environment model in solar greenhouse was established in the paper, in which many factors of the greenhouse were reflected, such as the geographical position, outside lighting, azimuth, construction parameters, shape of the roof surface and cover material, and the light intensity at any point in the greenhouse at any time can be simulated. In order to determine the direct radiation on a calculated point in the solar greenhouse, a relation between the calculated point and corresponding sunlight incident point of roof was established, by using a method of backtracking for sunlight ray. According to the assumption of constant brightness in the sky everywhere, the diffuse radiation on a calculated point was determined, by the visual angle of roof and outdoor sky from the position of the calculated point. The impact of different kinds of weather conditions on the inside lighting environment was considered, and a simulation calculation method for inside direct radiation and diffuse radiation was established in the model. The impact of the haze of transparent cover material on the direct and the diffuse radiation was taken into account too. By these methods, the model was become more realistic and more accurate.
出处
《沈阳农业大学学报》
CAS
CSCD
北大核心
2013年第5期513-517,共5页
Journal of Shenyang Agricultural University
基金
现代农业产业技术体系建设项目(CARS-25-D-04)
“十一五”国家科技支撑计划项目(2009BADA4B04)
公益性行业(农业)科研专项项目(201203002)
高效设施农业标准化工程技术集成示范项目(201130104-4)
关键词
日光温室
光环境模型
地理方位
太阳辐射照度
温室朝向
solar greenhouse
light environment model
geographical position
solar radiation
azimuth of greenhouse
