Using a ray-tracing model to design a greenhouse with maximized transmission during winter

被引:0
作者
Swinkels, G. L. A. M. [1 ]
Kempkes, F. L. K. [1 ]
Hemming, S. [1 ]
机构
[1] Wageningen UR Greenhouse Hort, Wageningen, Netherlands
来源
V INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF MODELLING AS AN INNOVATIVE TECHNOLOGY IN THE HORTICULTURAL SUPPLY CHAIN - MODEL-IT 2015 | 2017年 / 1154卷
关键词
ray tracing; model; greenhouse; transmission; winter;
D O I
10.17660/ActaHortic.2017.1154.23
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
During winter, natural light limits crop growth, and it is therefore important to use all the available sunlight for crop production. Important factors that influence light transmission are the structure of the greenhouse (construction elements, orientation, roof slope, symmetrical or asymmetrical design) and the greenhouse roof material (base material, coating(s), diffuse or clear). A project was started to maximize light transmission during winter by optimizing these factors. In the first phase of the project, a simulation model was used to analyze a number of promising new concepts. To validate the simulation model, a practical experiment with scale models in the open field was carried out. During winter, the transmission of these scale models was measured. Despite a number of factors that could not be controlled or modelled, such as rain and condensation, in general there was a good match between measured and calculated values. As an overall conclusion, the simulation model showed no consistent differences from the measurements. An asymmetric cover (saw tooth) in combination with diffuse glass did not contribute significantly to light transmission in comparison with a Venlo type cover. This supported the decisions made during the design of the final full-scale demonstration greenhouse in the follow-up project.
引用
收藏
页码:179 / 183
页数:5
相关论文
共 10 条
[1]  
Gieling Th.H., 2013, 1277 WAG UR, P100
[2]  
Hemming S., 2004, 100 AGR FOOD INN, P155
[3]  
Hemming S., 2006, 130 WAG UR GLAST, P59
[4]  
Janssen E. G. O. N., 2004, 2004BCR0060 TNO
[5]  
NEN, 1990, 2675 NEN
[6]   Performance of a concentrated photovoltaic energy system with static linear Fresnel lenses [J].
Sonneveld, P. J. ;
Swinkels, G. L. A. M. ;
van Tuijl, B. A. J. ;
Janssen, H. J. J. ;
Campen, J. ;
Bot, G. P. A. .
SOLAR ENERGY, 2011, 85 (03) :432-442
[7]   Feasibility study for combining cooling and high grade energy production in a solar greenhouse [J].
Sonneveld, P. J. ;
Swinkels, G. L. A. M. ;
Bot, G. P. A. ;
Flamand, G. .
BIOSYSTEMS ENGINEERING, 2010, 105 (01) :51-58
[8]  
Sonneveld P. J., 2005, 20 EUR PHOT SOL EN C
[9]  
Stanghellini C., 2010, 1025 GTB WAG UR GLAS, P50
[10]   Improvement of greenhouse insulation with restricted transmission loss through zigzag covering material [J].
Swinkels, GLAM ;
Sonneveld, PJ ;
Bot, GPA .
JOURNAL OF AGRICULTURAL ENGINEERING RESEARCH, 2001, 79 (01) :91-97