Integrated Coal Gasification Combined Cycle Power Research Articles

Optimizing modes of a small-scale combined-cycle power plant with atmospheric-pressure gasifier

The scheme of an integrated coal gasification combined-cycle power plant with small capacity is proposed. Using the built mathematical model a feasibility study of this unit was performed, taking into account the kinetics of physical and chemical transformations in the fuel bed. The estimates of technical and economic efficiency of the plant have been obtained and compared with the alternative options.

Characteristics and economic evaluation of CO2‐capturing power generation systems using solar thermal energy and gasified coal

AbstractThis paper describes the evaluation results of CO2‐capturing power generation systems which use solar thermal energy and gasified coal as the input energy. The following two power generation systems have been proposed and evaluated from the characteristic and economic points of view: a CO2‐capturing hybrid power generation system (proposed system I), and a CO2‐capturing three‐stage heat‐utilizing power generation system (proposed system II). In evaluation, a conventional integrated coal‐gasification combined cycle power generation system (IGCC system) is adopted as the reference system. The proposed systems are assumed to be constructed in Albuquerque, U.S. and Osaka, Japan. The net coal‐to‐electricity efficiency has been estimated to be 51.0% for the proposed system I, and to be 40.1% for the proposed system II on higher heating value basis, whereas the efficiency of the conventional system is estimated to decrease from 43.7% to 32.7% when the CO2 generated is captured. Taking the IGCC system without CO2 capture as the reference system, the cost of CO2 emission reduction of the proposed systems I and II in Albuquerque are estimated to be 22,100–23,800 yen/t‐C and 21,800–23,000 yen/t‐C, respectively, and that in Osaka to be 37,000–38,700 yen/t‐C and 23,300–24,500 yen/t‐C, respectively. It has been shown that these are lower than the cost of CO2 emission reduction of the IGCC system with CO2 capture by 43,800–48,400 yen/t‐C. © 2001 Scripta Technica, Electr Eng Jpn, 138(1): 1–13, 2002

98/00670 Integrated coal gasification combined-cycle power plant using high-thermal conductivity heat exchanger and its operation

98/00670 Integrated coal gasification combined-cycle power plant using high-thermal conductivity heat exchanger and its operation

Energetic analysis and optimisation of an integrated coal gasification-combined cycle power plant

Methods are presented to analyse and optimise the energetic performance of integrated coal gasification-combined cycle (IGCC) power plants. The methods involve exergy analysis and pinch technology and can be used to identify key process parameters and to generate alternative design options for improved energetic efficiency. The methods are demonstrated by analysing the initial design of a 600 MW c IGCC power plant based on the Shell coal gasification process.