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Research Papers: Gas Turbines: Industrial & Cogeneration

Study and Field Tests of the Novel Low Pressure Fogger System for Industrial Gas Turbine

[+] Author and Article Information
Y. Levy

 Israel Institute of Technology, Haifa 32000, Israellevyy@aerodyne.technion.ac.il

V. Sherbaum, V. Ovcharenko

 Israel Institute of Technology, Haifa 32000, Israel

Y. Sotsenko

 Israel Electric Company, Haifa 31000, Israel

I. Zlochin

 Optiguide Ltd., Yokneam 29062, Israel

J. Eng. Gas Turbines Power 130(1), 012002 (Jan 09, 2008) (7 pages) doi:10.1115/1.2770487 History: Received February 07, 2006; Revised May 20, 2007; Published January 09, 2008

Based on three patented innovations (air-assist atomizer, wetness sensor, and closed loop programmable logic controller (PLC)), a new low-pressure power gas turbine augmentation system was developed. Two modifications of air-assist atomizer were tested in the Jet Engine Laboratory of the Technion. The tests were performed to investigate influence of thermodynamic parameters on spray characteristics, as droplet size and velocity distribution of the spray. The system as a whole has passed field test in a gas turbine of a power station. Droplet characteristics, conceptual design aspects, and test results are described. It was found that the droplet sauter mean diameter was 20μm. The field tests demonstrated that the power augmentation system operates safely and reliably. Wetness sensors and closed loop PLC proved to be a safe method for power augmentation, which prevents droplet penetration into the compressor inlet.

Copyright © 2008 by American Society of Mechanical Engineers
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References

Figures

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Figure 1

Effect of air velocity on maximum droplet diameter for different critical Weber numbers

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Figure 2

Schematic drawing of tested atomizer: (1) narrow tube, (2) acceleration chamber, and (3) helical channel

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Figure 3

Dependence of water capacity on input water pressure at an input air pressure of 6bars (gauge)

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Figure 4

Experimental setup

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Figure 5

Droplet size distribution along spray radius for various pressure drop values, atomizer No. 1

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Figure 6

Droplet size distribution along spray radius, distance from nozzle exit 100mm and 300mm, atomizer No. 1

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Figure 7

Droplet axis velocity distribution along spray radius, atomizer No. 1

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Figure 8

Droplet size distribution along spray radius, distance from nozzle exit 100mm and 300mm, atomizer No. 2

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Figure 9

Droplet axis velocity distribution along spray radius, distance from nozzle exit 100mm and 300mm, atomizer No. 2

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Figure 10

Radial volume flux distribution, distance from nozzle exit 100mm

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Figure 11

Comparison of velocity values and velocity distribution along spray radius for atomizer Nos. 1 and 2

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Figure 12

Spray geometry at atomizer No. 1 exit. Input air pressure is equal to 6bars (gauge).

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Figure 13

Dependence of droplet velocity (along spray axis) on SMD at the maximal concentration point for atomizer Nos. 1 and 2

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Figure 14

Recovery of GT power out on hot day as function of cooling potential

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Figure 15

Recovery of GT efficiency on hot day as function of cooling potential

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Figure 16

Installed nozzles

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Figure 17

Distorted filter cartridge ribs

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Figure 18

Performance of two-stage power augmentation system

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