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TECHNICAL PAPERS: Gas Turbines: Electric Power

A Study of On-Line and Off-Line Turbine Washing to Optimize the Operation of a Gas Turbine

[+] Author and Article Information
Meherwan P. Boyce

 The Boyce Consultancy Group, LLC, 2121 Kirby Drive, Houston, TX 77019

Francisco Gonzalez

 Enterprise Products Company, 10207 FM 1942, Mont Belvieu, TX 77580

J. Eng. Gas Turbines Power 129(1), 114-122 (Sep 28, 2005) (9 pages) doi:10.1115/1.2181180 History: Received August 25, 2005; Revised September 28, 2005

This paper highlights the procedure followed in order to establish an effective on-line and off line water wash program on a fleet of 36 small industrial turbines. To determine the efficacy of water washing, a program of tests under controlled conditions was organized. With proper condition monitoring techniques, a set of tests were developed in order to identify the proper water wash frequency and the dissolving agent used to water wash. The goal of the water wash program is to maximize turbine power, and efficiency, while minimizing maintenance labor, and material. The gas turbine compressor isentropic efficiency, the overall heat rate, and the overall thermal efficiency were used to compare the tests and evaluate the performance of different water wash frequencies and solvents. 8760 points defined each test as the data were taken over a 1yr time period, at a 1h interval.

Copyright © 2007 by American Society of Mechanical Engineers
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Figures

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Figure 1

Compressor performance map

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Figure 2

Effect of compressor efficiency drop on the overall thermal efficiency reduction

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Figure 3

Effect of compressor water wash on power output

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Figure 4

Nonrecoverable losses in a gas turbine as a function of equivalent operating hours

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Figure 5

Water wash system

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Figure 6

Gas turbine plenum showing the on-line water ring on the outside of the plenum

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Figure 7

Inside view of air plenum showing the off-line water wash ring and the on-line water wash nozzles

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Figure 12

Result of tests of different frequencies with demineralized water and water base solvents

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Figure 13

Degradation of turbine compressor efficiency

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Figure 15

Degradation of heat rate and overall turbine thermal efficiency, turbine 3

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Figure 14

Degradation of heat rate and overall turbine thermal efficiency, turbine 2

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Figure 11

Results of tests of different water base solvents

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Figure 10

Results of test of demineralized water, water base soap, and solvent base soap

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Figure 9

Results of tests of demineralized water and different soap vendors

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Figure 8

Three Centaur-solar gas turbines

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