Title page for ETD etd-06102012-040555

Type of Document Master's Thesis
Author Moscahlaidis, George
URN etd-06102012-040555
Title Investigation of air control on chunkwood combustor
Degree Master of Science
Department Agricultural Engineering
Advisory Committee
Advisor Name Title
Cundiff, John S. Committee Chair
Jaasma, Dennis R. Committee Member
Mason, J. P. Jr. Committee Member
  • Combustion
Date of Defense 1989-03-05
Availability restricted
Many small scale agricultural operations such as greenhouses, peanut drying and tobacco curing,

use significant quantities of thermal energy. Direct combustion of biomass is a potential source of heat energy for those agricultural applications to substitute for the electricity or fossil fuels (principally LP gas) currently used. However, small scale combustion equipment often operates with low efficiency and high emissions.

A prototype chunkwood combustor was installed and tested. The basis for controlling heat output,

was the modulation of air supplied to the primary and secondary combustors. Exhaust gas CO and

CO2 concentrations, combustor efficiency, and useful heat output were measured. The cleannest

burn was achieved during a forty minute test, where 50 percent of stoichiometric air was introduced

at the primary, and 170 percent at the secondary, for a total of 220 percent stoichiometric. The

overall average CO/CO2 ratio for this test was 0.084, and 0.1 is considered to be an average rating for a combustion in a wood stove. Moreover, the efficiency during this test was 52 percent.

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