Title: The 700°C steam turbine power plant – status of development and outlook

Authors: Heiner Edelmann, Martin Effert, Kai Wieghardt, Holger Kirchner

Addresses: Siemens Power Generation, P.O. Box 3220, D-91050 Erlangen, Germany. ' Siemens Power Generation, P.O. Box 3220, D-91050 Erlangen, Germany. ' Siemens Power Generation, P.O. Box 101755, D-45466 Mulheim, Germany. ' Siemens Power Generation, P.O. Box 101755, D-45466 Mulheim, Germany

Abstract: This paper appraises the current development status of the 700°C steam power plant under consideration of process optimisation as well as design aspects of the steam turbine and steam generator. The results for a compact arrangement of the steam turbine and steam generator are also presented. Based on a cycle analysis, a net efficiency between 49.3% and 51.4% can be achieved with the 700°C steam power plant – depending on the implementation and based on an inland plant site. No competing development activities for the 700°C steam power plant are known from the USA or Japan.

Keywords: advanced 700°C pulverised fuel power plants; AD700; BENSON boiler; compact power islands; market development; material improvements; nickel-based alloys; steam turbines; 700°C steam power plants; process optimisation.

DOI: 10.1504/IJETP.2007.014742

International Journal of Energy Technology and Policy, 2007 Vol.5 No.3, pp.366 - 383

Available online: 06 Aug 2007 *

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