지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
이용수
초록· 키워드
오류제보하기
The tracer gas method has an advantage that can estimate total and local ventilation rate by tracing air flow. However, the field measurement using tracer gas has disadvantages such as danger, inefficiency, and high cost. Therefore, the aim of this study was to evaluate ventilation rate in pig house by using the thermal distribution data rather than tracer gas. Especially, LMA (Local Mean Age), which is an index based on the age of air theory, was used to evaluate the ventilation rate in pig house. Firstly, the field experiment was conducted to measure micro-climate inside pig house, such as the air temperature, CO2 concentration and wind velocity. And then, LMA was calculated based on the decay of CO2 concentration and air temperature, respectively. This study compared between LMA determined by CO2 concentration and air temperature; the average error and root mean square error were 3.76 s and 5.34 s. From these results, it was determined that thermal distribution data could be used for estimation of LMA. Finally, CFD (Computational fluid dynamic) model was validated using LMA and wind velocity. The mesh size was designed to be 0.1 m based on the grid independence test, and the Standard k-ω model was eventually chosen as the proper turbulence model. The developed CFD model was highly appropriate for evaluating the ventilation rate in pig house.
목차
등록된 정보가 없습니다.
참고문헌 (17)
참고문헌 신청
De Jong, T. / 1990 / Natural ventilation of large multi-span greenhouses: Proefschrift Wageningen
Goedhart, M. / 1983 / Methods and instruments for ventilation rate measurements III / International Symposium on Energy in Protected Cultivation 148
Han, H. T. / 2009 / Estimation of local mean ages of air in a room with multiple inlets : 148 ~ 153
Hong, S. W. / 2008 / Numerical simulation of ventilation efficiencies of naturally ventilated multi-span greenhouses in Korea / Transactions of the ASABE 51 (4) : 1417 ~ 1432
Kwon, K. S. / 2011 / Analysing ventilation efficiency in a test chamber using age-of-air concept and CFD technology / Biosystems Engineering 110 (4) : 421 ~ 433
Goedhart, M. / 1983 / Methods and instruments for ventilation rate measurements III / International Symposium on Energy in Protected Cultivation 148
Han, H. T. / 2009 / Estimation of local mean ages of air in a room with multiple inlets : 148 ~ 153
Hong, S. W. / 2008 / Numerical simulation of ventilation efficiencies of naturally ventilated multi-span greenhouses in Korea / Transactions of the ASABE 51 (4) : 1417 ~ 1432
Kwon, K. S. / 2011 / Analysing ventilation efficiency in a test chamber using age-of-air concept and CFD technology / Biosystems Engineering 110 (4) : 421 ~ 433
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