Highly efficient electricity generation from biomass by integration and hybridization with combined cycle gas turbine (CCGT) plants for natural gas
Artikel i vetenskaplig tidskrift, 2010

Integration/co-firing with existing fossil fuel plants could give near term highly efficient and low cost power production from biomass. This paper presents a techno-economical analysis on options for integrating biomass thermal conversion (optimized for local resources 50 MW) with existing CCGT (combined cycle gas turbine) power plants (800-1400 MWth). Options include hybrid combined cycles (HCC), indirect gasification of biomass and simple cycle biomass steam plants which are simulated using the software Ebsilon Professional and Aspen Plus. Levelized cost of electricity (LCoE) is calculated with cost functions derived from power plant data. Results show that the integrated HCC configurations (fully-fired) show a significantly higher efficiency (40-41%, LHV (lower heating value)) than a stand-alone steam plant (35.5%); roughly half of the efficiency (2.4% points) is due to more efficient fuel drying. Because of higher investment costs, HCC options have cost advantages over stand-alone options at high biomass fuel prices (>25 EUR/MWh) or low discount rates (<5%). Gasification options show even higher efficiency (46-50%), and the lowest LCoE for the options studied for fuel costs exceeding 10 EUR/MWh. It can be concluded that clear efficiency improvements and possible cost reductions can be reached by integration of biomass with CCGT power plants compared to stand-alone plants.

fuels

systems

eucalyptus-globulus

Gasification

bioenergy

heat

Hybrid combined cycles

power

poland

Integration

energy evaluation

Biomass

Modeling

Författare

Erik Pihl

Chalmers, Energi och miljö, Energiteknik

Stefan Heyne

Industriella energisystem och -tekniker

Henrik Thunman

Chalmers, Energi och miljö, Energiteknik

Filip Johnsson

Chalmers, Energi och miljö, Energiteknik

Energy

0360-5442 (ISSN)

Vol. 35 4042-4052

Ämneskategorier

Energiteknik

DOI

10.1016/j.energy.2010.06.008