바이오매스 합성가스 적용을 위한 LPG 엔진발전기 개조 및 성능평가
Modification of an LPG Engine Generator for Biomass Syngas Application
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Syngas, also known as synthesis gas, synthetic gas, or producer gas, is a combustible gas mixture generated when organic material (biomass) is heatedin a gasifier with a limited airflow at a high temperature and elevated pressure. The present research was aimed at modifying the existing LPG enginegenerator for fully operated syngas. During this study, the designed gasifier-powered woodchip biomass was used for syngas production to generatepower. A 6.0 kW LPG engine generator was modified and tested for operation on syngas. In the experiments, syngas and LPG fuels were tested astest fuels. For syngas production, 3 kg of dry woodchips were fed and burnt into the designed downdraft gasifier. The gasifier was connected to ablower coupled with a slider to help the air supply and control the ignition. The convection cooling system was connected to the syngas flow pipefor cooling the hot produce gas and filtering the impurities. For engine modification, a customized T-shaped flexible air/fuel mixture control devicewas designed for adjusting the correct stoichiometric air-fuel ratio ranging between 1:1.1 and 1.3 to match the combustion needs of the engine. Thecomposition of produced syngas was analyzed using a gas analyzer and its composition was; 13∼15 %, 10.2∼13 %, 4.1∼4.5 %, and 11.9∼14.6 %for CO, H2, CH4, and CO2 respectively with a heating value range of 4.12∼5.01 MJ/Nm3. The maximum peak power output generated from syngasand LPG was recorded using a clamp-on power meter and found to be 3,689 watts and 5,001 watts, respectively. The results found from the experimentshow that the LPG engine generator operated on syngas can be adopted with a de-ration rate of 73.78 % compared to its regular operating fuel.
Abstract
Syngas, also known as synthesis gas, synthetic gas, or producer gas, is a combustible gas mixture generated when organic material (biomass) is heatedin a gasifier with a limited airflow at a high temperature and elevated pressure. The present research was aimed at modifying the existing LPG enginegenerator for fully operated syngas. During this study, the designed gasifier-powered woodchip biomass was used for syngas production to generatepower. A 6.0 kW LPG engine generator was modified and tested for operation on syngas. In the experiments, syngas and LPG fuels were tested astest fuels. For syngas production, 3 kg of dry woodchips were fed and burnt into the designed downdraft gasifier. The gasifier was connected to ablower coupled with a slider to help the air supply and control the ignition. The convection cooling system was connected to the syngas flow pipefor cooling the hot produce gas and filtering the impurities. For engine modification, a customized T-shaped flexible air/fuel mixture control devicewas designed for adjusting the correct stoichiometric air-fuel ratio ranging between 1:1.1 and 1.3 to match the combustion needs of the engine. Thecomposition of produced syngas was analyzed using a gas analyzer and its composition was; 13∼15 %, 10.2∼13 %, 4.1∼4.5 %, and 11.9∼14.6 %for CO, H2, CH4, and CO2 respectively with a heating value range of 4.12∼5.01 MJ/Nm3. The maximum peak power output generated from syngasand LPG was recorded using a clamp-on power meter and found to be 3,689 watts and 5,001 watts, respectively. The results found from the experimentshow that the LPG engine generator operated on syngas can be adopted with a de-ration rate of 73.78 % compared to its regular operating fuel.
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