Effects of Air Temperature, Velocity and Floor Type on Gaseous Emissions from a Scale Model of Dairy Open Lots
In typical Chinese dairy housing and manure management system, outdoor open lot is an important emission source of contaminant gases.In this study, dairy open lot scale models were built to evaluate effects of air temperature (15 to 35℃), surface velocity (0.4 to 1.2 m s-1) and floor type (unpaved soil floor or brick-paved floor) on CO2, CH4, N2O and NH3 emissions.Generally, CO2, N2O and NH3 emissions increased with the increasing of air temperature and velocity on both unpaved soil and brick-paved floors.Velocity showed different impacts on CH4emissions from different floor types.There was a drop on CH4 emissions from brick floor when velocity kept increasing and the drop would be delayed by air temperature.No similar drop was found from soil floor under the examined velocities.Except methane, other gaseous emissions were more sensible to changes at lower velocity (0.4 to 0.7 m s-1) or lower air temperature (15 to25℃).Gaseous emissions from soil floor were more sensible to velocity changes while the emissions from brick floor were more sensible to air temperature changes.Higher NH3emissions were measured on brick-paved floor.In comparison with NH3 emission, CO2 and CH4emissions were less affected by floor type.
Wind tunnel unpaved soil floor brick paved floor sensitivity analysis
Luyu Ding Guoqiang Zhang Simon Kristensen Wei Cao Zhengxiang Shi Baoming Li Chaoyuan Wang
Department of Agricultural Structure and Bioenvironmental Engineering,China Agricultural University, Department of Engineering, Aarhus University, Blichers Allé 20, P.O.Box 50, 8830 Tjele, Denmark
国际会议
The 2015 International Symposium on Animal Environment and Welfare(动物环境和福利国际研讨会)
重庆
英文
50-57
2015-10-23（万方平台首次上网日期，不代表论文的发表时间）