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Moisture balance and tracer gas technique for ventilation rates measurement and greenhouse gases and ammonia emissions quantification in naturally ventilated buildings
Abstract Experiments were performed to study the ventilation rates in a naturally ventilated animal building through four summer seasons and three winter seasons. The ventilation rates were determined using moisture (H2O) balance, tracer gas technique (TGT) and CO2-balance. The statistical analyses were correlation analysis, regression model and t-test. Continuous measurements of gaseous concentrations (NH3, CH4, CO2 and N2O), temperature and relative humidity inside and outside the building were performed. The H2O-balance showed reliable results through winter seasons and acceptable results to some extent through summer seasons. The CO2-balance showed unexpected high differences to the other methods in some cases. The TGT showed reliable results compared to H2O-balance and CO2-balance. The air exchange rates (AERs) were 37.2, 61.6 and 63 h−1 through summer seasons, and 40.3, 38.9 and 60.5 h−1 through winter seasons subject to H2O-balance, TGT and CO2-balance, respectively. The emission rates through summer seasons, subject to TGT, were 191, 855, 73,877 and 45.6 g d−1 AU−1; and through winter seasons were 88, 463, 55,976 and 47.3 g d−1 AU−1, for NH3, CH4, CO2 and N2O, respectively.
Highlights ► The H2O-balance showed reliable results through winter seasons and slightly acceptable results through summer seasons. ► The CO2-balance showed unexpected high differences to the other methods in some cases. ► The tracer gas technique showed reliable results compared to H2O-balance and CO2-balance.
Moisture balance and tracer gas technique for ventilation rates measurement and greenhouse gases and ammonia emissions quantification in naturally ventilated buildings
Abstract Experiments were performed to study the ventilation rates in a naturally ventilated animal building through four summer seasons and three winter seasons. The ventilation rates were determined using moisture (H2O) balance, tracer gas technique (TGT) and CO2-balance. The statistical analyses were correlation analysis, regression model and t-test. Continuous measurements of gaseous concentrations (NH3, CH4, CO2 and N2O), temperature and relative humidity inside and outside the building were performed. The H2O-balance showed reliable results through winter seasons and acceptable results to some extent through summer seasons. The CO2-balance showed unexpected high differences to the other methods in some cases. The TGT showed reliable results compared to H2O-balance and CO2-balance. The air exchange rates (AERs) were 37.2, 61.6 and 63 h−1 through summer seasons, and 40.3, 38.9 and 60.5 h−1 through winter seasons subject to H2O-balance, TGT and CO2-balance, respectively. The emission rates through summer seasons, subject to TGT, were 191, 855, 73,877 and 45.6 g d−1 AU−1; and through winter seasons were 88, 463, 55,976 and 47.3 g d−1 AU−1, for NH3, CH4, CO2 and N2O, respectively.
Highlights ► The H2O-balance showed reliable results through winter seasons and slightly acceptable results through summer seasons. ► The CO2-balance showed unexpected high differences to the other methods in some cases. ► The tracer gas technique showed reliable results compared to H2O-balance and CO2-balance.
Moisture balance and tracer gas technique for ventilation rates measurement and greenhouse gases and ammonia emissions quantification in naturally ventilated buildings
Samer, M. (author) / Ammon, C. (author) / Loebsin, C. (author) / Fiedler, M. (author) / Berg, W. (author) / Sanftleben, P. (author) / Brunsch, R. (author)
Building and Environment ; 50 ; 10-20
2011-10-15
11 pages
Article (Journal)
Electronic Resource
English
Greenhouse gas emissions from naturally ventilated freestall dairy barns
| Elsevier | 2014