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Title: Screening evaluation of novel power cycles integrated with gasification plants. Final report

Abstract

This report presents the results of a screening study on power cycles integrated with a coal gasification plant. Three basic plant configurations are studied: (1) the Condensing Combined Cycle, the most common combined cycle, which includes combustion turbines, gas expanders and condensing steam turbines. This configuration should be considered as the base case; (2) the Single Cycle, which is comprised of combustion turbines and gas expanders, but no steam turbines; (3) the Non-Condensing Combined Cycle, which utilizes combustion turbines, gas expanders and a non-condensing steam turbine. The gasifier used throughout is the Texaco entrained, coal slurry-fed, air blown gasification system along with a scrubber, sulfur removal system and a tail gas treater. The combustion turbines are advanced types. Nominal turbine inlet temperature in all cases is 2400/sup 0/F but pressure ratios vary depending upon the particular example. The turbine cooling method is thermal barrier, and both air and steam cooling is applied. Performance and water requirements are compared among the various cycles. The results show that efficient power plants integrated with a coal gasification system are possible and do not necessarily require the condensing steam turbine that is characteristic of combined cycle systems. The most efficient plant configuration studied includedmore » a non-condensing steam turbine. The best plant heat rate calculated for this configuration is 7956 Btu/Kwh which compares very favorably to the 8287 Btu/Kwh calculated for the condensing combined cycle. The best system that did not include steam turbines yielded a heat rate of 8039 Btu/Kwh.« less

Authors:
;
Publication Date:
Research Org.:
Westinghouse Electric Corp., Eddystone, PA (USA)
OSTI Identifier:
6273227
Alternate Identifier(s):
OSTI ID: 6273227
Report Number(s):
EPRI-AF-1002
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
20 FOSSIL-FUELED POWER PLANTS; COMBINED-CYCLE POWER PLANTS; COMPARATIVE EVALUATIONS; THERMAL EFFICIENCY; THERMODYNAMIC CYCLES; WATER REQUIREMENTS; GAS TURBINES; COOLING; COAL GASIFICATION; HEAT EXCHANGERS; STEAM TURBINES; TEXACO GASIFICATION PROCESS; EFFICIENCY; GASIFICATION; POWER PLANTS; THERMAL POWER PLANTS; THERMOCHEMICAL PROCESSES; TURBINES; TURBOMACHINERY 200102* -- Fossil-Fueled Power Plants-- Power Cycles

Citation Formats

Foster-Pegg, R.W., and Garland, R.V. Screening evaluation of novel power cycles integrated with gasification plants. Final report. United States: N. p., 1979. Web.
Foster-Pegg, R.W., & Garland, R.V. Screening evaluation of novel power cycles integrated with gasification plants. Final report. United States.
Foster-Pegg, R.W., and Garland, R.V. Thu . "Screening evaluation of novel power cycles integrated with gasification plants. Final report". United States.
@article{osti_6273227,
title = {Screening evaluation of novel power cycles integrated with gasification plants. Final report},
author = {Foster-Pegg, R.W. and Garland, R.V.},
abstractNote = {This report presents the results of a screening study on power cycles integrated with a coal gasification plant. Three basic plant configurations are studied: (1) the Condensing Combined Cycle, the most common combined cycle, which includes combustion turbines, gas expanders and condensing steam turbines. This configuration should be considered as the base case; (2) the Single Cycle, which is comprised of combustion turbines and gas expanders, but no steam turbines; (3) the Non-Condensing Combined Cycle, which utilizes combustion turbines, gas expanders and a non-condensing steam turbine. The gasifier used throughout is the Texaco entrained, coal slurry-fed, air blown gasification system along with a scrubber, sulfur removal system and a tail gas treater. The combustion turbines are advanced types. Nominal turbine inlet temperature in all cases is 2400/sup 0/F but pressure ratios vary depending upon the particular example. The turbine cooling method is thermal barrier, and both air and steam cooling is applied. Performance and water requirements are compared among the various cycles. The results show that efficient power plants integrated with a coal gasification system are possible and do not necessarily require the condensing steam turbine that is characteristic of combined cycle systems. The most efficient plant configuration studied included a non-condensing steam turbine. The best plant heat rate calculated for this configuration is 7956 Btu/Kwh which compares very favorably to the 8287 Btu/Kwh calculated for the condensing combined cycle. The best system that did not include steam turbines yielded a heat rate of 8039 Btu/Kwh.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1979},
month = {2}
}

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