DocumentCode :
2088662
Title :
Optimized design of hot air pipe in greenhouse based on CFD technique
Author :
Jiaoliao, Chen ; Fang, Xu ; Jiangxin, Yang ; Qinglin, Ai
Author_Institution :
Inst. of Manuf. Eng., Zhejiang Univ., Hangzhou, China
fYear :
2011
fDate :
27-29 May 2011
Firstpage :
441
Lastpage :
445
Abstract :
The greenhouse environment with Forced-air heating system affected by diameter of hot air pipe (HAP), shape, arrangement, number of exhaust outlet in pipe were simulated by computational fluid dynamics (CFD) technique. The standard k-ε 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 exhaust 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 environment in greenhouse show that heating effect of optimized structure is better than the results of other cases.
Keywords :
computational fluid dynamics; design engineering; exhaust systems; finite volume methods; flow simulation; greenhouses; heat transfer; heating; pipe flow; turbulence; CFD simulation; HAP parameters; PISO algorithm; air pressure distribution; circle profile exhaust outlet; computational fluid dynamics; design optimization; finite volume discretisation code; forced-air heating system; greenhouse environment; hot air pipe; interlaced exhaust outlet arrangement; nongray DO model; numerical simulation; numerical solution; pressure implicit with splitting of operator algorithm; radiation model; standard k-ε turbulence model; Atmospheric modeling; Computational fluid dynamics; Computational modeling; Green products; Heating; Shape; Ventilation; CFD; forced hot air pipe; greenhouse; temperature distribution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
New Technology of Agricultural Engineering (ICAE), 2011 International Conference on
Conference_Location :
Zibo
Print_ISBN :
978-1-4244-9574-0
Type :
conf
DOI :
10.1109/ICAE.2011.5943836
Filename :
5943836
Link To Document :
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