Experimental investigation of wood combustion and combustion profiles in a cylindrical combustion chamber Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/3484zm04d

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  • This study presents the results of an experimental investigation of wood combustion. Variables chosen for investigation were fuel feed rate, fuel moisture content, fuel particle size, excess air, fraction and temperature of under-fire air. Data recorded during the experiments included the composition and temperature of the combustion products in the combustion chamber, particulate emissions and combustible fraction of the particulate. Most mathematical models describing the combustion of wood particles require numerical solutions. For this investigation, an alternative model was used to generate closed form solutions for the determination of the burning times for wood particles in the combustion chamber. The model results were in good agreement with the experimental findings. The temperature profiles of combustion products within the combustion chamber were closely estimated, using an analytical model developed for this investigation. The composition profiles within the combustion chamber were estimated with the use of a chemical equilibrium model. These models were in good agreement with the experimental results for the estimation of the oxygen and carbon dioxide contents of the combustion products. The chemical equilibrium model proved to be inadequate for the determination of the NO[subscript x] and CO contents of the combustion products. Based upon the experimental data, a linear regression model was developed to investigate the variables affecting the combustion process. A computer model was used to calculate the temperature and composition of the combustion products under adiabatic conditions. Over the range of the variables considered, it was concluded that combustion efficiency and particulate emissions were most influenced by the factors that increased the volume and velocity of combustion products in the chamber. Moreover, it was also concluded that the part-load operation of the combustion unit resulted in higher particulate emissions and lower combustion efficiency.
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-02-22T18:20:26Z (GMT) No. of bitstreams: 1 Dadkhah-NikooAbbas1991.pdf: 7193717 bytes, checksum: 6881eda64774039be85a7b689c3bb5ae (MD5)
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  • description.provenance : Made available in DSpace on 2013-02-22T18:20:26Z (GMT). No. of bitstreams: 1 Dadkhah-NikooAbbas1991.pdf: 7193717 bytes, checksum: 6881eda64774039be85a7b689c3bb5ae (MD5) Previous issue date: 1991-05-02

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