Energetic and Exergetic Performances of a Retrofitted, Large-Scale, Biomass-Fired CHP Coupled to a Steam-Explosion Biomass Upgrading Plant, a Biorefinery Process and a High-Temperature Heat Network

This paper aims at assessing the impact of retrofitting an existing, 730 MWe, coal-fired power plant into a biomass-fired combined heat and (CHP) on its energetic exergetic performances. A comprehensive thermodynamic model was developed validated against field data, resulting in less than 1% deviation between measurements for main process parameters. The then used to predict behaviour biomass CHP after retrofitting. modelled unit is coupled steam-explosion upgrading plant, biorefinery process, high-temperature network. 13 scenarios were studied. At constant boiler load, delivering considered clients can increase total energy efficiency from 44% (electricity only) 64%, while exergy decreases 39% 35%. 67% could be reached by lowering network temperature 120?C 70?C. Identifying needed could, however, represent limiting factor reach such high efficiencies. For demand, increasing load 80 100% order provide additional makes 43% 55%, 36%.