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Full-Text Articles in Life Sciences
Evaluating Ventilation Rates Based On New Heat And Moisture Production Data For Swine Production, Yanxi Lu, Morgan D. Hayes, John P. Stinn, Tami M. Brown-Brandl, Hongwei Xin
Evaluating Ventilation Rates Based On New Heat And Moisture Production Data For Swine Production, Yanxi Lu, Morgan D. Hayes, John P. Stinn, Tami M. Brown-Brandl, Hongwei Xin
Biosystems and Agricultural Engineering Faculty Publications
Heat and moisture production (HMP) rates of animals are used for calculation of ventilation rate (VR) in animal housing. New swine HMP data revealed considerable differences from previously reported data. This project determined new design VRs and evaluated differences from previously recommended VRs. The swine production stages evaluated included gestation, farrowing, nursery, growing, and finishing. The ranges of ambient temperature and ambient relative humidity (RH) evaluated for VR were -25°C to 15°C in 10°C increments and 15% to 75% in 15% increments, respectively. Indoor set points for temperature and RH were, respectively, 15°C, 20°C, 25°C and 60%, 70%, 80% for …
Minimum Ventilation For Modern Broiler Facilities, Richard S. Gates, Douglas G. Overhults, Shuhui H. Zhang
Minimum Ventilation For Modern Broiler Facilities, Richard S. Gates, Douglas G. Overhults, Shuhui H. Zhang
Biosystems and Agricultural Engineering Faculty Publications
New functions for whole-house broiler heat production as a function of bird age using modern straight run broiler growth rates are presented and compared to values in the literature. The approximations are based on field measurements of environmental conditions in modern broiler housing, using a technique that matches predicted to actual fuel use to estimate partitioning between latent and sensible heat. Development of a program utilizing these approximations to compute ventilation and heating requirements for temperature and humidity control in broiler housing is described. The program utilizes steady-state heat and moisture balances commonly used for design purposes, with hourly or …