Dispersion Modeling of SO2 Emissions from a Lignite Fired Thermal Power Plant using CALPUFF

Paingduan Khamsimak, Sirichai Koonaphapdeelert and Nakorn Tippayawong

Energy and Environment Research, 2012, vol. 2, issue 2, 127

Abstract: In this work, dispersion of sulfur dioxide (SO2) in the vicinity of Mae Moh power plant, the largest fossil fuel power plant in northern Thailand, was investigated using well known air dispersion model. The area of 2,500 km2 around the plant was studied, with spatial resolution of 200 x 200 m2. Publicly available MM5 and CALMET software were used to provide meteorological conditions within the study domain, while CALPUFF was used to simulate the patterns of SO2 dispersion, based on actual plant operations in winter, summer and rainy seasons of the year 2009. Comparison against measurements from monitoring stations was made. Simulated results were found to agree qualitatively and quantitatively well with measured data. Root mean squared errors were found in the range between 2.19 to 8.32 µg/m3. The CALPUFF model can be used for SO2 dispersion prediction with satisfactory accuracy.Â

Date: 2012
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