Analysis of Natural Ventilation Rates of Venlo-type Greenhouse Built on Reclaimed Lands using CFD
학회지: 한국농공학회논문집 57(6) 21 - 33 쪽
저자: 이상연, 이인복, 권경석, 하태환, 여욱현, 박세준, 김락우, 조예슬, 이승노
개요
Recently, the Korean government announced a new development plan for a large-scale greenhouse complex in reclaimed lands. Wind environments of reclaimed land are entirely different from those of inland. Many standard books for ventilation design didn’t include qualitative standard for natural ventilation. In this study, natural ventilation rates were analyzed to suggest standard for ventilation design of venlo type greenhouse built on reclaimed land. CFD (Computational Fluid Dynamics) simulation models were designed according to the number of spans, wind conditions and vent openings. The wind profile at a reclaimed land was designed using ESDU (Engineering Sciences Data Unit) code. Using the designed CFD simulation model, ventilation rates were computed using mass flow rate and tracer gas decay method. Additionally computed natural ventilation rates were evaluated by comparing with ventilation requirements. As a result of this study, ventilation rates were decreased with increasing of the number of spans. Ventilation rates were linearly increased with increasing of wind speed. When the wind speed was 1.0 m·s-1, only side vent was open and wind direction was 45°, homogeneity of ventilation rate at 0∼1 m height is the worst. Finally, chart for computing natural ventilation rate was suggested. The chart was expected to be used for establishing standard of ventilation design.
Download Link :
https://www.researchgate.net/profile/I-B_Lee/publication/288698408_Analysis_of_Natural_Ventilation_Rates_of_Venlo-type_Greenhouse_Built_on_Reclaimed_Lands_using_CFD/links/5841138408aeda696812e547/Analysis-of-Natural-Ventilation-Rates-of-Venlo-type-Greenhouse-Built-on-Reclaimed-Lands-using-CFD.pdf
http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=NGHHCI_2015_v57n6_21