AZEP Gas Turbine Combined Cycle Power Plants - Thermo-economic Analysis

Yıl 2006, Cilt: 9 Sayı: 1, 21 - 28, 01.03.2006

Björn Möller Tord Torisson Mohsen Assadi Sven Sundkvist Mats Sjödin Ake Klang Knut Asen Kjersti Wilhelmsen

Öz

Conventional power plants based on fossil fuel without CO2 capture produced flue gas streams with concentrations of CO2 between 3% and 15%, contributing to the threat of increasing global warming. Existing capture technologies such as post-combustion flue gas treatments using chemical absorption, pre-combustion carbon removal or combustion in O2/CO2 atmospheres suffer from significant efficiency penalties as well as major increases in investment costs. A less energy intensive concept for oxygen production is a mixed conducting membrane (MCM) reactor which produces pure oxygen from compressed air. The MCM reactor is best integrated into a conventional gas turbine combined cycle, called advanced zero emissions plant (AZEP), to provide an efficient and cost-effective power plant altogether. In this paper the economic performance of four different combined cycle alternatives in two different gas turbine sizes are evaluated; two of the combined cycles being based on the AZEP concept. The results show that the AZEP concept presents a more competitive system in terms of efficiency and economy compared to traditional capture systems.

Anahtar Kelimeler

CO2 capture, zero emissions, combined cycles, thermo-economy