Multi-Objective Optimization of Semi-Isolated Green Energy Cchp System(Sige-Cchp)Under Uncertain Co-Combustion Ratio

Abstract

This paper introduces a SIGE-CCHP system to study the performance of CCHP systems under different optimization objectives for natural gas and biomass gas co-combustion equipment. The focus is on daily operation and maintenance costs and carbon emissions. As the proportion of biomass gas increases, carbon emissions decrease but operation and maintenance costs rise. When optimizing for operation and maintenance costs, the system performs best. When optimizing for carbon emissions, the system becomes a carbon absorption system, absorbing up to 2021.86 kg of CO2. The optimal mixing ratio is 1:1, reducing operation and maintenance costs slightly while increasing carbon emissions. As the proportion of natural gas decreases, carbon emissions decrease but operation and maintenance costs rise. This research provides a theoretical basis for further optimizing the operation of natural gas and biomass gas co-combustion equipment.

Keywords: CCHP, operation cost, carbon emission, mixed combustion, biomass gas