Investigation into the Internal Flow and Temperature Characteristics for Greenhouse Ventilation Patterns using Computational Analysis
Journal Title: International Journal of engineering Research and Applications - Year 2017, Vol 7, Issue 8
Abstract
Proper ventilation of the greenhouse inhibits the excessive fluctuation of temperature and humidity, which enhances the quality and productivity of agriculture. Air flow and temperature distribution are very important. In the presentation research, thermal-fluid analysis was performed to analyze the significant factors affecting ventilation such as ventilation parameter and external wind speed. For this, model for the analysis is consistence of the greenhouse with 13 multi-coopers, and conducted to transient thermal fluid dynamics analysis. The analysis result show that the initial cooling speed was lower for forced ventilation than for the natural convection because of the air curtain phenomenon. but forced convection proved to be effective for temperature uniform distribution, which caused subsequent temperature decrease in the greenhouse after certain time. The standard deviation was introduced and applied as an evaluation criterion for temperature uniformity, and the visual effect and standard deviation method tended to agree with each other. Therefore, it is recommended that ventilation of the greenhouse is more effective when the natural ventilation is followed by forced circulation using fan after a certain time. Temperature distribution is quantitatively evaluated by applying the standard deviation method which is regarded as more efficient method.
Authors and Affiliations
Deogjae Hur, Sukhwan Jeong, Jung-Hun Noh
Keywords
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- EP ID EP392077
- DOI 10.9790/9622-0708060108.
- Views 88
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