Techno-economic Analysis of Supercritical Coal-Fired Power Plant Coupled with Biomass Pyrolysis System
摘要
An efficient strategy to increase the volume of biomass treatment, reduce coal consumption, and lower carbon dioxide emissions is to co-fire biomass and coal. In this paper, a system model that a 600 MW supercritical coal-fired power plant coupled with biomass fast pyrolysis is established and simulated, using process simulation software. According to the results of process simulation, the energy efficiency, fixed capital investment, internal rate of return, payback period are calculated, which aimed to analyze the thermodynamic and economic performance of the coupling system. The results show that while the coupling technical retrofitting of the system reduces energy efficiency and worsens economic performance, the decrease of energy efficiency is not significant. Additionally, the internal rate of return is higher than the discount rate, and the investment can be returned during the project’s life. These findings indicate that the pyrolysis-based co-firing system is technically feasible and economically viable.