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The marginal efficiency of combined cycle gas turbines

Technical Report:

Abstract

The combined cycle power plant consists of a coal fired boiler with steam turbines, where the feedwater is preheated with the exhaust heat from the gas turbine. The idea behind this type of combined cycle power plant is to take the design from a normal coal fired steam power plant, redesign it by removing the steam extractions from the turbines and install a gas turbine with a heat recovery preheater for the feedwater preheating. Compared to the nominal steam power plant, with steam extraction feedwater preheating, the consequences are substantial for the steam cycle of the combined power plant. The coal fired boiler, steam turbines and the condenser receive an increased mass flow and these components have to be redesigned. The steam turbines deliver more power, which means that more electrical power is generated at the generator terminals. The study consists of a broad parametric study on the combined cycle power plant to find out the most suitable gas turbines for this purpose and performance. One important result is the marginal efficiency, which is defined to find out with what efficiency the gas is converted into electricity when the gas turbine is used in this type of combined cycle. The  More>>
Authors:
Publication Date:
Nov 01, 1994
Product Type:
Technical Report
Report Number:
LUTMDN-TMVK-5242
Reference Number:
SCA: 200104; PA: SWD-94:007520; EDB-95:013457; SN: 95001301731
Resource Relation:
Other Information: DN: Examination paper; PBD: Nov 1994
Subject:
20 FOSSIL-FUELED POWER PLANTS; COMBINED CYCLES; PARAMETRIC ANALYSIS; GAS TURBINES; EFFICIENCY; FOSSIL-FUEL POWER PLANTS; MATHEMATICAL MODELS; COAL; 200104; COMPONENTS
OSTI ID:
10105749
Research Organizations:
Lund Univ. (Sweden). Dept. of Heat and Power Engineering
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: ISSN 0282-1990; Other: ON: DE95723984; TRN: SE9407520
Availability:
OSTI; NTIS
Submitting Site:
SWD
Size:
77 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Nilsson, Pontus. The marginal efficiency of combined cycle gas turbines. Sweden: N. p., 1994. Web.
Nilsson, Pontus. The marginal efficiency of combined cycle gas turbines. Sweden.
Nilsson, Pontus. 1994. "The marginal efficiency of combined cycle gas turbines." Sweden.
@misc{etde_10105749,
title = {The marginal efficiency of combined cycle gas turbines}
author = {Nilsson, Pontus}
abstractNote = {The combined cycle power plant consists of a coal fired boiler with steam turbines, where the feedwater is preheated with the exhaust heat from the gas turbine. The idea behind this type of combined cycle power plant is to take the design from a normal coal fired steam power plant, redesign it by removing the steam extractions from the turbines and install a gas turbine with a heat recovery preheater for the feedwater preheating. Compared to the nominal steam power plant, with steam extraction feedwater preheating, the consequences are substantial for the steam cycle of the combined power plant. The coal fired boiler, steam turbines and the condenser receive an increased mass flow and these components have to be redesigned. The steam turbines deliver more power, which means that more electrical power is generated at the generator terminals. The study consists of a broad parametric study on the combined cycle power plant to find out the most suitable gas turbines for this purpose and performance. One important result is the marginal efficiency, which is defined to find out with what efficiency the gas is converted into electricity when the gas turbine is used in this type of combined cycle. The definition itself is also discussed. 5 refs. 60 figs}
place = {Sweden}
year = {1994}
month = {Nov}
}