Estimation of THI Index to Evaluate Thermal Stress of Animal-occupied Zone in a Broiler House Using BES Method
학회지: 한국농공학회 60(2), 75-84쪽
저자: 하태환, 권경석, 홍세운, 최희철, 이준엽, 이동현, 우샘이, 양가영, 김락우, 여욱현, 이상연, 이인복
개요
Thermal stress of livestock has been issued due to recent climate change trends and this causes reproductive disorders, decreased feed consumption, immunosuppression, and increased mortality of animals. Concept of THI has been widely used to quantitatively evaluate the degree of thermal stress for
animals, however use of this concept is restricted for animals living in the enclosed facilities such as mechanically ventilated broiler houses. In this study, time-based internal energy flow and variation trends of temperature and humidity were analyzed based on BES technique. Local weather data, insulation
characteristics of building materials, heat and moisture generation rate from broilers according to age, algorithm of ventilation operation were adopted for boundary condition of the model to accurately compute THI values inside the mechanically ventilated broiler house. From the BES computation, excess frequency of THI threshold in Jeju city was highest on the assumption that air conditioning equipments were not installed. When general raising density (39 kg m-2 ) was adopted, total 2,191 hours were exceeded. Excess hours of THI threshold were strongly related to the cumulative air temperature (R2 =0.87).
Download Link : https://doi.org/10.5389/KSAE.2018.60.2.075