전산유체역학을 이용한 표준 오리사 설계안에 대한 환기효율성 분석
Analysis on Ventilation Efficiency of Standard Duck House using Computational Fluid Dynamics
2
조회
0
다운로드
2
인용
0
참고문헌
키워드
초록
In Korea, 69.4 % of duck farms had utilized conventional plastic greenhouses. In this facilities, there are difficulties in controlling indoor environments for raising duck. High rearing density in duct farms also made the environmental control difficult resulting in getting more stressed making their immune system weaker. Therefore, a facility is needed to having structurally enough solidity and high efficiency on the environmental control. So, new design plans of duck house have recently been conducted by National Institute of Animal Science in Korea. As a study in advance to establish standard, computational fluid dynamics (CFD) was used to estimate the aerodynamic problems according to the designs by means of overall and regional ventilation efficiencies quantitatively and qualitatively. Tracer gas decay (TGD) method was used to calculate ventilation rate according to the structural characteristics of duck houses including installation of indoor circulation fan. The results showed that natural ventilation rate was averagely 164 % higher than typically designed ventilation rate, 1 AER (min -1 ). Meanwhile, mechanically ventilated duck houses made 81.2 % of summer ventilation rate requirement. Therefore, it is urgent to develop a new duck house considering more structural safety as well as higher efficiency of environmental control.
Abstract
In Korea, 69.4 % of duck farms had utilized conventional plastic greenhouses. In this facilities, there are difficulties in controlling indoor environments for raising duck. High rearing density in duct farms also made the environmental control difficult resulting in getting more stressed making their immune system weaker. Therefore, a facility is needed to having structurally enough solidity and high efficiency on the environmental control. So, new design plans of duck house have recently been conducted by National Institute of Animal Science in Korea. As a study in advance to establish standard, computational fluid dynamics (CFD) was used to estimate the aerodynamic problems according to the designs by means of overall and regional ventilation efficiencies quantitatively and qualitatively. Tracer gas decay (TGD) method was used to calculate ventilation rate according to the structural characteristics of duck houses including installation of indoor circulation fan. The results showed that natural ventilation rate was averagely 164 % higher than typically designed ventilation rate, 1 AER (min -1 ). Meanwhile, mechanically ventilated duck houses made 81.2 % of summer ventilation rate requirement. Therefore, it is urgent to develop a new duck house considering more structural safety as well as higher efficiency of environmental control.
참고문헌 (18)
- ANSYS Fluent, "ANSYS Fluent tutorial guide, version 15.0", ~ (2013)
- Bjerg, B., "Modelling of air inlets in CFD prediction of airflow in ventilated animal houses", Computers and Electronics in Agriculture, 34, pp.223~234 (2002)
- Bjerg, B., "Modelling of ammonia emissions from naturally ventilated livestock buildings: Part 2", air change modelling Biosystems Engineering, 116, pp.246~258 (2013)
- Bjerg, B., "Modelling of ammonia emissions from naturally ventilated livestock buildings", Part 3 : CFD modelling Biosystems Engineering, 116, pp.259~275 (2013)
- Study on incidence of respiratory disease according to the configurations of structural and ventilation system using aerodynamic approaches, "Choi, H. L.", National Institute of Animal Science, ~ (2008)
- Climatization of animal houses, "CIGR", Aberdeen, ~ (1984)
- Ha, J.S., "Evaluation of natural ventilation efficiency of protected cultivation system in reclaimed land using aerodynamic simulation", 석사, pp.2015
- Hong, S.W, "Numerical simulation of ventilation efficiencies of naturally ventilated multi-span greenhouse in Korea", Transactions of the ASABE, 51, pp.1417~1432 (2008)
- 황보 종, "무창 계사의 환기 시스템이 케이지 사육 육계의 초기 생산성에 미치는 영향", 한국가금학회지, 33(1), pp.57~64 (2006), 한국가금학회
- Lee, I.B., "Evaluation of CFD accuracy for the ventilation study of a naturally ventilated broiler house", JARQ, 41(1), pp.53~64 (2007)
- Norton, T., "Optimising the ventilation configuration of naturally ventilated livestock buildings for improved indoor environmental homogeneity", Building and Environment, 45, pp.983~995 (2010)
- Sapounas, A., "Simulating the effect of forces pit ventilation on ammonia emission from naturally ventilated cow houses with CFD", The 4th European conference on Precision Livestock Farming (2009)
- Seo, I.H., "Improvement of the ventilation system of a naturally ventilated broiler house in the cold season using computational simulation", Biosystems Engineering, 104, pp.106~117 (2009)
- 송상현, "추적가스 실험을 통한 축사 내 질병 확산 분석", 한국농공학회논문집, 54(3), pp.37~45 (2012), 한국농공학회[DOI]
- Wu, W., "An assessment of a partial pit ventilation system to reduce emission under slatted floor-Part 2: Feasibility of CFD prediction using RANS turbulence models", Computer and Electronics in Agriculture, 83, pp.134~142 (2012)