LUmber Kiln Voc Testing Using the Water Mass Balance APproach

摘要

Two lumber dryign kilns were tested for volatile organic compounds using the water mass balance approach. The objective of the testing was to measure the emisison factor for total hydrocarbons, methanol, and formadehyde fro msouthern Yellow Pine dimensional lumber during the drying cycle. The WMB approach was selected as the most appropriate method due to the kiln construction nad operation. The WMB approach relates parameter emission rates to the moisture content fo the vented gas. The approach theory and calculations are described. Reference test methodology was used for all measurements. The WMB approach provides a viable procedure to measure lumber drying kiln VOC emissins. The greaterst variability is in measuring the lumber moisture loss during drying. The testing produced results comparable to those reported in the open literature for similar wood species. Results fro mthe water mass balance approach compared favorably with the carbon mass balance appraoch on the direct-fired kiln. The moisture loss measurements were more variable than expected.