Comparative Analysis of Gas-Turbine Engine Diagnostics through Compressor Wash Wastewater Parameter Monitoring for Geregu Gas-Turbine Power Plant
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Published:
Dec 12, 2023
Keywords:
Compressor Wash Effluent, Gas Turbine Engines, Geregu Power, Gas Path Parameters, Diagnosis, Monitoring
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Abstract
This paper focuses on finding a lasting solution to the reason why offline compressor washing of unit 13 at Geregu Power plc in Ajaokuta does not restore power output lost due to fouling back to the rated output, as is the case for the other two (2) units in the plant and for several reported cases published in the literature. Monitoring of parameters closely related to the power output was carried out to find out the root causes for the low output recovery after offline compressor wash and came up with a successful diagnosis by interrelating GT13 wash effluent test results of parameters like conductivity, turbidity, and heavy metal concentration with parameters of two (2) other turbines in the plant. Using statistical tools like the mean and Pearson correlation coefficient for the four-year period, the mean comparative result indicates that the conductivity of GT13 was higher than that of GT11 and GT12 by 50% and 79%, respectively. The turbidity of GT13 was 570% and 700% higher than that of GT11 and GT12. The Pearson correlation coefficients of GT13 effluent conductivity, turbidity, and silica content relative to the power output recovery after wash were (-89.2%), (-64.4%), and (-77.3%), respectively, and the covariance of each of the three parameters relative to one another was high. Effluent Ph as a factor was discarded based on its 0% linear correlation coefficient with the output. The conclusion reached is that the co-linear relationship between conductivity, silica content, and effluent turbidity is responsible for GT13's low output recovery after the wash.
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Mohammed, A. K., Ozigis, I. I., & Lawal, N. M. (2023). Comparative Analysis of Gas-Turbine Engine Diagnostics through Compressor Wash Wastewater Parameter Monitoring for Geregu Gas-Turbine Power Plant. ABUAD Journal of Engineering Research and Development, 6(2), 192-204. https://doi.org/10.53982/ajerd.2023.0602.19-j
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References
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[4] Kurz, H., C. & Brun, K. (2014). Gas turbine degradation, in Proceeding of 43rd Turbomachinery & 30th Pump Users Symposia (Pump & Turbo 2014). September 23-25, 2014 Houston, Texas.
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[8] Gbanaibolou, J., Sampath, S. & Gray, I. (2017). Diagnostics of gasturbine system using gas path and rotordynamic response approach in Proceedings of 23rd symposium on air breathing engines, Manchester, United Kingdom.
[9] Syverud, E., Bakken, L. Bjornas, F. & Langnes, K. (2003). Gasturbine operation offshore and online compressor wash at peak load in Proceedings of ASME turbo expo on ‟power for land, sea and air June 16-19 Atlanta, Georgia.
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[11] Igie, U. (2017). Gasturbine compressor fouling and washing in Power, Aerospace and propulsion on gasturbine performance. ASME journal of Engineering for gasturbines and power. 139 (12).
[12] Abbas, O.K. (2014). Techno economic analysis of gasturbine compressor washing to combat fouling. MSc thesis, Cranfield university, United Kingdom.
[13] Agbadede, R. & Kainga, B. (2020) Investigation of wash fluid pre-heating on effectiveness of online compressor washing in industrial gasturbines. Research square, : https://doi.org/10.21203/rs.3.rs-41657/v1.
[14] Maiwada, B., Muazu, N.M., Ibrahim, S. & Musa, S.M. (2016). Impact of compressor wash on gasturbine performance. Indian journal of Engineering sciences and computing ,6 (3)
[15] Tahan, M., Tstoutsanis, E., Mohammed, M. & Abdulkarim, Z.A. (2017).Performance-based health monitoring, diagnostics and prognostics for condition-based maintenance of gas turbines. Journal of Applied energy, 198(1), 122-144.
[16] Loboda, I. (2010). Gasturbine condition monitoring and diagnostics. Gurrapa Injeti(Ed.), 120-145.
[17] Mevissen, F. & Meo, M. (2019). A review of Nondestructive test/structural health monitoring techniques .National Institute of health(.gov).https://pubmed.ncbi.nlm.nih.gov.
[18] Schadeeva, D., Shanmukh, S., Rajagoplan, V., Kaushik, A., Parayalil, C. & Reddy, R.(2018). Methods for effluent based condition assessment. International application published under patent cooperation treaty (PCT).IPN number:WO2018/004873A1.
[19] Fronapel, J.P. (1995). C-130 Engine compressor wash study. Defense Technical Information center. https://apps.dtic.mil/sti/citations/ADA299862
[20] Pirkle, P. S. (1995). Cadmium in Engine compressor wash water effluent. Defense Technical Information center.Lynn Holden 501-388-007, (DSN731)
[21] Ma, J., Wu, S., Ravi, S., Biswas, S. & Sahu, A.K. (2020). Determination of Physicochemical Parameters and Levels of Heavy Metals in Food Wastewater with Environmental Effects. Hindawi Bio-inorganic chemistry and applications journal, 8886093, 9.
[22] Sathya, K.., Nagarajan, K., Malar, G., Rajalakshmi, S. & Raja, L. P. (2022). A comprehensive review on comparison among efuent treatment methods and modern methods of treatment of industrial wastewater efuent from diferent sources .Applied Water Science Journal, 12(70), 3201-022.
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[24] Trygar, R (2013). What exactly is Ph? https://www.tpomag.com>2013/12-tpomag.com .
[25] Doyle, D. (2017). Turbine oil analysis. eSource https://www.alsglobal.com/en/News-and-publications/2022/06/esource-102-turbine-oil-analysis
[26] Stalder, J.P. (1998). Gasturbine compressor washing state of the art field experiences. American Solar turbines incorporated. American society of engineering (ASME). 123(2), 363-370.
[27] Safety Institute. (2023). Graz University of Technology.
[28] Orion Thermo Scientific™ A326 pH/Dissolved Oxygen Portable Multiparameter Meter. cohttps://www.fishersci.se/shop/products/orion-star-a326-ph-dissolved-oxygen-portable-multiparameter-meter/11601489
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[30] Drisu, C.G. Mafianna, M,O., Dirisu, G.B. & Amodu, R. (2016). Level of Ph in drinking water of an oil and gas producing community and perceived biological and health implications. European journal of basic and applied sciences. 3(3), 2059-3058
[31] Ewere, E.E., Omoigerale, M.O., Bamawo,O.E.R. & Erhunmwunse, N.O. (2014). Physio-Chemical Analysis of Industrial Effluents in parts of Edo States Nigeria. Journal of applied Science environment and Management. 18(2), 267- 272
[32] Hanson, R., Twumasi, A.K. & Boi-D (2019). Analysis of Industrial Effluent from some factories in Tema. European Journal of Earth and Environment .6( 1).
[33] Naaz, A., Swaroopa, S. & Choudry, A.K. (2017). Physico-chemical and microbial analysis of steel industry effluent. International Journal of Scientific and Research Publications, 3(7), 2250- 3153.
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[36] Srivastava, H.S. & Patel, P. (2022). Radar remote sensing of soil moisture .Radar Remote sensing Applications and challenges earth observation, 405-44, Science Direct.https://doi.org/10.1016/B978-0-12
[37] Thakur, M. (2023). Covariance Formulae. https://www.educba.com/covariance-formula/
[38] Langfill, Q. & Haselbach, L. (2016). Assessment of Lube Oil Management and Self Cleaning Oil Filter Feasibility in WSF Vessels-Final Report. (Washington State Department of Transport). 29-68.
[39] Magaroni, D. (2002). The Role of Lubricant Condition Monitoring in Maintenance Programmes. Lube -Tech 024. http://www.safety.odpm.gov.uk/fire/firesafetyindex.htm or https://www.lube -media.com., 4.
[40] Evans, J.S. (2010). Where does all that metal come from. www.wearcheck.co.za. 42, 1-6.
[41] Howarth, M. (2020). {Rochem Fyre wash) engineerlive.com/content/essentials-gas turbine-cleaning#(2020) online edition
[42] Robb, D. (2008). Power engineering int.com. https://www.gtefficiency.com power engineering.com