Title: Development of a lignite-fired power plant concept with integrated pressurised fluidised-bed drying and fuel cells

Authors: F.U. Leidich, R. Breitenfelder, H. Mandel, J. Krautz, M. Gniazdowski

Addresses: ALSTOM Power Generation AG, Boveristrasse 22, 68309 Mannheim, Germany. ' ALSTOM Power Generation AG, Boveristrasse 22, 68309 Mannheim, Germany. ' Vattenfall Europe Generation AG & Co KG, Vom-Stein-Strasse 39, 03050 Cottbus, Germany. ' Brandenburgische Technische Universitat Cottbus, Karl-Jannack-Straße 3, 03044 Cottbus, Germany. ' Babcock-Borsik Service GmbH, Duisburger Straße 375, 46049 Oberhausen, Germany

Abstract: In the coming decades, lignite will become one of the most important fuels for power production in Germany. In the last five years, Vattenfall Europe and RWE have put power plants of the 800–1000 MW class with efficiency of up to more than 43% into service. Four to five per cent efficiency can further be gained by using pre-dried lignite as fuel (BOA plus concept of RWE). Additional steps are possible if the lignite-drying process and combustion are operated under pressure. This paper describes the first steps based on the A.M. technology whereby the waste heat of fuel cells is used for operation of the lignite dryer to achieve highest efficiency levels.

Keywords: lignite fired power plants; pressurised fluidised bed dryer; fuel cells; waste heat; lignite drying; power generation.

DOI: 10.1504/IJETP.2005.006768

International Journal of Energy Technology and Policy, 2005 Vol.3 No.1/2, pp.39 - 49

Published online: 05 Apr 2005 *

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