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Preliminary Design and Economic Analysis of a Biomass Fed Micro-Gas Turbine Plant for Decentralised Energy Generation in Tuscany

[+] Author Affiliations
David Chiaramonti, Giovanni Riccio, Francesco Martelli

University of Florence, Florence, Italy

Paper No. GT2004-53546, pp. 79-86; 8 pages
  • ASME Turbo Expo 2004: Power for Land, Sea, and Air
  • Volume 7: Turbo Expo 2004
  • Vienna, Austria, June 14–17, 2004
  • Conference Sponsors: International Gas Turbine Institute
  • ISBN: 0-7918-4172-3 | eISBN: 0-7918-3739-4
  • Copyright © 2004 by ASME


Biomass is a significant renewable energy source in Tuscany. A GIS-based software model, jointly developed by the Energetics Department of the University of Florence (DEF), the Agriculture and Forestry Economic Department of the University of Florence (DEEAF) and Energia Trasporti Agricoltura (ETA) in the framework of a LIFE supported project (BIOSIT) has been used to estimate the available resources in the Tuscany region. In this context, a gas turbine cycle based on a dual combustion system has been considered (DCGT, Dual Combustion Gas Turbine). The size of the plant (∼100 kWe) targets small decentralised power generation. The DCGT system aims at achieving a great flexibility through both internal and external firing. In fact, the adoption of an external combustion chamber makes possible to adapt the plant to various types of solid biomass without affecting significantly the thermodynamic cycle and therefore the performances. The technical analysis of available industrial components (gas turbine, heat exchanger, biomass combustor) has been carried out. The computation of the thermodynamic performances was carried out by a dedicate in-house developed software. The economic analysis was performed for the proposed system, and a sensitivity analysis on the critical parameters elaborated. The use of natural gas and bioethanol was also compared in the dual combustion mode.

Copyright © 2004 by ASME



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