Session: 33-01 Deposition, erosion and fouling in gas turbine engines

Paper Number: 152186

Impact of Shift in Frequency of Online Water Washes on Corrected Isentropic Efficiency of Compressor of Heavy-Duty Gas Turbine 

Frequent online water washes of Gas turbine compressor are a critical activity to sustain the site-corrected compressor isentropic efficiency after each offline water wash in dusty environments of Middle East. At one of the CCPP sites of ACWA Power, HDGT OEM requested to change the online water wash frequency from thrice a week to once a week. The reason behind this request was compressor blade erosion due to higher droplet sizes of online water wash spraying circuit. This investigation is an effort to estimate how the frequency of online Water wash impacts the isentropic efficiency of compressor for two different scenarios having different frequencies of online water wash. The first scenario was only one-time online water wash per week with water rinsing cycle only and once in month with detergent cycle. The second scenario was with three online water washes per week, while two with water rinsing cycle and one with detergent cycle. Various parameters related to compressor and GT performance compared e.g., compressor discharge temperature, compressor inlet temperature, compressor pressure ratio, site -corrected compressor efficiency and site corrected heat rate. During the investigation, it identified that the higher frequency of online water wash contributes to sustain the compressor efficiency for 2-3 months, however, with less frequency of online water wash the compressor efficiency starts dropping within one-month after off-line water wash.

Presenting Author: Muhammad Adnan Saroosh ACWA POWER

Presenting Author Biography: Adnan’s highest qualification is master’s in mechanical engineering from Korea Advance Institute of Science &Technology (KAIST, South Korea) with Bachelor of engineering from University of Engineering & Technology (UET, Lahore, Pakistan). Adnan is a licensed Charted Engineer from Institute of Mechanical Engineers U.K., and he is also a PMP® Certified professional. Adnan has more than 18 years of experience in Power and Energy Sector and has managed multi-million value engineering projects. Adnan’s areas of expertise are design, development and performance engineering of Heavy-duty Gas Turbines, HRSG’s, Steam turbines, CCPP, ISCC, thermal plants, CSP and Cogens. Adnan served ACWA Power COE for more than 3 years as a consultant appointed by GE Gas Power Engineering where he contributed towards thermal performance improvement of various CCPP sites. Before that, Adnan was part of GE Gas Power Engineering team under Hot & Harsh COE. Currently, Adnan is Director of Energy analytics and Solutions (Thermal) at ACWA Power Center of Excellence (COE)

Authors:

Muhammad Adnan Saroosh ACWA POWER
Muhammad Azhar Janjua ACWA Power
Yahya Zafar Iqbal Acwa Power
Jalal Hunain Zia ACWA Power
Mathew York ACWA Power