농가 난방용 가축분뇨 고체연료 연소 보일러의 에너지 및 엑서지 분석
Energy and Exergy Analysis of a Livestock Manure Solid Fuel Combustion Boiler for Farm Heating
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The utilization of livestock manure as a bioresource for energy production has emerged as a promising approach, with an increasing focus on improving fuel quality and combustion efficiency. However, for the effective utilization and broader adoption of livestock manure as an energy source, research should focus on improving fuel quality and combustion efficiency and conducting system performance analysis and optimization. In this study, a numerical process model of a livestock manure solid fuel combustion boiler for farm heating was developed using Aspen plus® to perform the energy and exergy analyses. The energy and exergy flows were visualized using process stream flow diagrams, and the efficiencies of individual system components were analyzed. The simulation results indicated that the combustor exhibited the lowest exergy efficiency of 37.08% and the highest exergy destruction ratio of 69.14%, highlighting it as the most critical component for system performance improvement. Although increasing the hot- water outlet temperature could improve the exergy efficiencies of both the boiler and farm, such a change may require a different boiler type, transitioning from an atmospheric to a pressurized boiler, and could result in crop damage due to overdrying. Therefore, this issue must be considered carefully.
Abstract
The utilization of livestock manure as a bioresource for energy production has emerged as a promising approach, with an increasing focus on improving fuel quality and combustion efficiency. However, for the effective utilization and broader adoption of livestock manure as an energy source, research should focus on improving fuel quality and combustion efficiency and conducting system performance analysis and optimization. In this study, a numerical process model of a livestock manure solid fuel combustion boiler for farm heating was developed using Aspen plus® to perform the energy and exergy analyses. The energy and exergy flows were visualized using process stream flow diagrams, and the efficiencies of individual system components were analyzed. The simulation results indicated that the combustor exhibited the lowest exergy efficiency of 37.08% and the highest exergy destruction ratio of 69.14%, highlighting it as the most critical component for system performance improvement. Although increasing the hot- water outlet temperature could improve the exergy efficiencies of both the boiler and farm, such a change may require a different boiler type, transitioning from an atmospheric to a pressurized boiler, and could result in crop damage due to overdrying. Therefore, this issue must be considered carefully.