Title: Evaluation of characteristics and economics of a CO₂-capturing H₂O turbine power generation system utilizing waste heat from a garbage incineration plant

Authors: Pyong Sik Pak; Yutaka Suzuki; Takanobu Kosugi

Addresses: Faculty of Engineering, Osaka University, 2–1 Yamadaoka, Suita, Osaka 565, Japan ' Faculty of Engineering, Osaka University, 2–1 Yamadaoka, Suita, Osaka 565, Japan ' Cooperative Research Center for Advanced Science and Technology, Osaka University, 2–1 Yamadaoka, Suita, Osaka 565, Japan

Abstract: A CO₂-capturing, hybrid-type of power generation system with highly efficient use of waste heat from factories, was proposed and its characteristics and economics were evaluated. In the system, waste heat from factories is utilized to improve thermal efficiency and gas turbine fuel is burned in the combustor by using oxygen instead of air to make it easy to capture generated CO₂from the turbine exhaust gas. By taking a garbage incineration plant as an example of waste heat emitting factories, the net enthalply efficiency of the system was estimated to be 69.6 per cent on the basis of consumed fuel, where both the power required to produce high-pressure oxygen and to liquefy captured CO₂ is taken into account. The proposed CO₂-capturing system was estimated to be economically feasible for the reference case assumed. Sensitivity analysis on vital economic indicators in the reference case has also been performed.

Keywords: CO2; carbon dioxide; carbon capture; oxygen combustion; gas turbines; waste heat; thermal efficiency; power generation; garbage incineration plants; waste incineration; waste disposal.

DOI: 10.1504/IJGEI.1998.071447

International Journal of Global Energy Issues, 1998 Vol.11 No.1/2/3/4, pp.211 - 217

Published online: 27 Aug 2015 *

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