Long term perspectives of biomass integrated gasification with combined cycle technology. Costs and efficiency and a comparison with combustion

摘要: The project on the title subject deals with question what performance levels could be obtained Biomass Integrated Gasification Combined Cycle (BIG/CC) technology longer term. At present it is observed that BIG/CC technology, although more efficient than state-of-the-art combustion similar scale, very expensive: DFl 8,000/kWe reported for a first generation unit of 30 MWe (compared to about 4,000 biomass power plant and 1,500-1,800 natural gas fired combined cycle scales). This sharply contrasts generally favourable outlooks have been presented technology. objectives this study are identify improvement potential term, technologies or modifications R D activities required extent can compete term waste incineration as well fossil fuel based generation. It stressed objective not give detailed cost breakdown systems short included: (a) Technology assessments options implemented in time frame 15-20 years; (b) System calculations by means flowsheet modelling tool ASPEN-plus; (c) Economic analyses including scale effects operationalizing concept learning curves (cost reduction over increased experience); (d) Calculation costs electricity (and treatment costs) comparison improved sensitivity analyses. focused direct CFB gasification systems. Two fuels (clean wood refuse derived RDF) three scales (starting from 30, 60 150 MWe) considered. most important involve turbine: reheating, recuperation temperatures considerable effect electrical system efficiency. Increasing has efficiency specific investment costs. 106 refs.