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Abstract
The severity of climate change and the urgency of ecological environment protection make the transformation of coal power imperative. In this paper, the relevant policies of coal-biomass co-firing power generation are combed, and the technical and economic evaluation of coal-biomass co-firing power generation technology is carried out using Levelized Cost of Electricity (LCOE) model. The result is that the LCOE of coal-biomass indirect co-firing power generation project is significantly higher than that of the pure coal-fired unit, with the LCOE rising by nearly 8%. Through sensitivity analysis, the LCOE will increase by 10.7% when it combusts 15% biomass, and increase by 19.1% when it combusts 20% biomass. The LCOE corresponding to wood chips increased by 5.71% and the LCOE to rice husks decreased by 6.06%. Finally, this paper puts forward some relevant policy suggestions, hoping to provide some reference for the promotion of coal-biomass co-firing power generation in China.
Highlights
With the growth of total energy consumption and the increasing proportion of electric power in energy consumption, the constraints of climate change and ecological environment protection are becoming increasingly tight, so the transformation of coal power is imperative
Coal-biomass co-firing power generation technology combines the utilization of coal-fired power plants and biomass to complement each other’s advantages
A comparative analysis is made between the coal-biomass co-firing power generation technology and the pure biomass power generation technology from application situation, fuel, unit type, efficiency, power generation investment, floor space and economical efficiency
Summary
With the growth of total energy consumption and the increasing proportion of electric power in energy consumption, the constraints of climate change and ecological environment protection are becoming increasingly tight, so the transformation of coal power is imperative. Biomass co-firing with coal can help to reduce greenhouse gas emissions and can act as a low-cost stepping-stone for developing biomass supply infrastructures [5]. Biomass can be co-fired with coal to reduce the impact of fossil-fuel power plants on the environment [7].To help in the transition to fully replace fossil fuels, co-firing of coal and biomass provides a less expensive means [8]. Through LCOE models, Agbor et al [11] studied 60 different scenarios involving various biomass feedstocks (wood chips, wheat straw, and forest residues) co-fired with coal in a 500 MW subcritical pulverized coal plant to determine their technical potential and costs, as well as to determine environmental benefits. LCOE model is proposed to analyze the economic feasibility of coal-biomass co-firing power generation technology, appropriate proportion of co-combustion and the LCOE of different types of biomass
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