During a major overhaul of a 30 MW geothermal turbine for the electricity sector of Mexico, a new rotor and new diaphragms were provided to recovery the power rate of the unit. Recuperation of the horizontal joint of upper and lower casings was required, as well as the inner diameter for diaphragm lodgings in both casings. The Geothermal steam turbines in Mexico suffer of accelerate degradation due mainly to high levels of sulphidric acid in the geothermal steam flow. Corrosion and dust particles are often present in the flow path turbine components affecting the performance and maintenance. In addition, the paper includes topics for on-site rehabilitation which include complex activities and challenges that must be taken into account for a successful rehabilitation process. The mapping process for horizontal joint casing, the processes used for recovery of planarity, the post weld heat treatments used for these components, and the machining process used for recovery inner diameters of casings.
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ASME 2009 Power Conference
July 21–23, 2009
Albuquerque, New Mexico, USA
Conference Sponsors:
- Power Division
ISBN:
978-0-7918-4350-5
PROCEEDINGS PAPER
Topics for On-Site Rehabilitation of a 30 MW Geothermal Turbine Available to Purchase
Alejandro Herna´ndez Rossette,
Alejandro Herna´ndez Rossette
Electrical Research Institute, Cuernavaca, MOR, Mexico
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Zdzislaw Mazur C.
Zdzislaw Mazur C.
Electrical Research Institute, Cuernavaca, MOR, Mexico
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Alejandro Herna´ndez Rossette
Electrical Research Institute, Cuernavaca, MOR, Mexico
Zdzislaw Mazur C.
Electrical Research Institute, Cuernavaca, MOR, Mexico
Paper No:
POWER2009-81027, pp. 305-309; 5 pages
Published Online:
September 22, 2010
Citation
Herna´ndez Rossette, A, & Mazur C., Z. "Topics for On-Site Rehabilitation of a 30 MW Geothermal Turbine." Proceedings of the ASME 2009 Power Conference. ASME 2009 Power Conference. Albuquerque, New Mexico, USA. July 21–23, 2009. pp. 305-309. ASME. https://doi.org/10.1115/POWER2009-81027
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