Life cycle assessment and cost benefit analysis of concentrated solar thermal gasification of biomass for continuous electricity generation
Yi Fang, Xian Li, Simon Ascher, Yize Li, Leilei Dai, Roger Ruan, Siming You
Abstract
The hybridization of solar and biomass energy systems is a promising technology for mitigating the issues of energy generation-related greenhouse gas emissions and high energy prices. The global warming potential and economic feasibility of a hybrid solar-bioenergy system, comprised of a concentrated solar tower, biomass gasifier, thermal storage, and combined cycle gas turbine, have been evaluated by using cost benefit analysis and life cycle assessment respectively. Sensitivity analysis is also carried out to identify the hotspots of costs and emissions. The net present worth of the proposed system at the 30th year was calculated to be about €–0.7 billion. There are two suggestions to enhance the economic viability of the system, allowing for a payback period of less than 10 years. The first suggestion involves reducing the O&M cost of the system by 19% at 43.9 €/MWh, and the second suggestion entails increasing the overall efficiency of the system by 20%. This system can save 787.7 kg of CO2-eq/tonwaste-wood and generate a total of about 0.8 million MWh of electricity each year. The findings provide scientific evidence for the design and deployment of hybrid technology to enhance economic profitability, while reducing carbon emissions. Overall, this study highlights the potential benefits of hybrid solar-bioenergy systems and encourages the adoption of sustainable energy practices for a greener future.