Optimized Design of Hot Air Pipe in Greenhouse Based on CFD Technique
The greenhouse environment with Forced-air heating system affected by diameter of hot air pipe (HAP), shape, ar-rangement, number of exhaust outlet in pipe were simulated by computational fluid dynamics (CFD) technique. The stan-dard k-e turbulence model, and the Non-gray DO model of radiation model were applied. The numerical solution was made by use of a finite volume discretisation code with the pressure implicit with splitting of operators (PISO) algorithm. Compared with CFD simulation results of 8 cases, the HAP parameters are chosen in the experimental greenhouse, which is a 300mm diameter, circle profile exhaust outlet and 12 ex-haust outlets of interlaced arrangement. According to the air pressure distribution in the HAP, the structure is optimized by adjusting the distance of exhaust outlet, which value is used by 1.05. The simulation and experimental results of heating -envi-ronment in greenhouse show that heating effect of optimized structure is better than the results of other cases.
CFD greenhouse temperature distribution forced hot airpipe
Chen Jiaoliao Xu Fang Yang Jiangxin At Qinglin
Institute of Manufacturing Engineering Zhejiang University Hangzhou, China Key Laboratory ofE&M, Min Key Laboratory ofE&M, Ministry of Education & Zheji-ang Province Zhejiang University of Technology, Institute of Manufacturing Engineering Zhejiang University Hangzhou, China
国际会议
山东淄博
英文
441-445
2011-05-27（万方平台首次上网日期，不代表论文的发表时间）