Moisture balance and tracer gas technique for ventilation rates measurement and greenhouse gases and ammonia emissions quantification in naturally ventilated buildings

作者：Samer M^*; Ammon C; Loebsin C; Fiedler M; Berg W; Sanftleben P; Brunsch R

来源：Building and Environment, 2012, 50: 10-20.

DOI：10.1016/j.buildenv.2011.10.008

• CO2-balance
• Gaseous emissions
• Livestock buildings
• Moisture (H2O) balance
• Natural ventilation
• Tracer gas technique

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.

• 出版日期2012-4