Operation & Maintenance of Power Plants 


and MTU’s expertise in the design, development, production and repair of the aircraft engines from which they are derived. Whether as part of a long-term service agreement or as a stand-alone mission, MTU offers the following on-site services: availability – 24 hours/365 days, 24-hours hotline for trouble shooting, local field service representatives in North America, South America and Asia-Pacific; inspections – periodic inspections and individual preventive maintenance concepts for reduced downtime; spare parts supply and management – complete range of GE LM-series spares available and rotable units and tooling available; vibration services – on-site trim balancing and vibration data analysis and laser alignment; combustor mapping and controls services – combustion and emission surveys, hardware upgrades/software updates, and controls services. An extensive testing service covers proof of actual


and true MW output, extensive combustor mapping capabilities and more.


Construction and decommissioning Similarly, RWE Power International’s specialist services cover every aspect of operations and maintenance, from construction and commissioning to eventual decommissioning. Te company offers gas turbine services, risk assessment processes, power plant information systems, environmental management and power station maintenance management. It also provides plant rehabilitation, power generation training and asset development. In terms of power plant operations and maintenance, RWE provides fully integrated power plant operations and maintenance services to optimise plant performance and generate higher profits. Its worldwide experience has been acquired on more than 45 000MW of power plant encompassing hard coal, lignite, gas, oil and nuclear power generation,


Maintaining accessories


T


edeco is a specialist in the early and real-time detection of failure in propulsion and mechanical


transmissions in the power generation and other industries. Its products include real-time failure


detectors for transmission and gas turbine engine gears and bearings, on-line lube system wear particle monitors, chip collectors and detectors, plus various sensing and gauging products. A particular speciality is on-line


debris monitoring, which Tedeco says is 24 www.engineerlive.com


cogeneration and renewables. Its technical support group (TSG) provides a broad spectrum of engineering services to the power industry and other heavy industries. Te extensive workshop facilities include state-of-the-art machinery, which coupled with its long experience, enables TSG to offer a comprehensive, high quality service that includes: workshop services and support for plant refurbishment, including: overhaul, repair or modification of existing plant and machinery; manufacturing of new components, spare parts and assemblies; outage management and delivery; on-site machining; CNC and general machining; and gas turbine services. In addition, RWE says that its plant rehabilitation engineers are specialists in evaluating and upgrading generation plants to prolong asset life and improve performance. Tey have experience in refurbishing power stations around the world and can devise and implement investment strategies that deliver enhanced asset value. In terms of training, the company says it can meet the staff training and development needs of power plant operators, using state-of-the-art learning approaches. It offers development programmes in all aspects of power generation and mining, whether on-site or at our training facilities in the UK and Germany.


Gas turbines Turbine Services (TS) is a total provider to owners and operators of industrial gas turbines worldwide, with particular specialisation in the heavy-duty frame range of gas turbines designed by GE. Te company’s products and services include: spare


and replacement parts; component manufacture and repair; turbine blade repair and coatings; rotor repair and overhaul; complete gas turbine refurbishment; field maintenance and engineering services; condition monitoring and diagnostics; and training services. In terms of spare parts, TS maintain a substantial


particularly important in the diagnosis of three major problems: spalling, bearing cage failure and skidding. Spalling occurs as a result of sub-surface


cracks in gear teeth or bearing rollers, balls or races which propagate just under the work hardened surfaces; where these microscopic cracks intersect the surface, flakes begin to form. The flakes are generated in very small quantities, early in the failure cycle. Failure to halt this process will eventually result in cracked ball, roller, cage or race and potential catastrophic failure. Bearing cage failure results from


overloaded bearings, misalignment, excessive heat, particulate contamination, or poorly toleranced components.


Whatever the cause, small fractures result in bending, melting or cracking of the bearing cage, leading to generation of ferrous and non-ferrous debris. Early detection of these particles could prevent the bearing cage from catastrophic failure. Skidding results from lightly loaded


bearings or poorly toleranced bearing components where there is a type of sliding motion between the balls/rollers, raceway and cage. This can generate very fine, almost chalk-like, debris particles that grind away at the bearing element surfaces. Eventually, this grinding results in a loss of tolerance and eventually, warns the company, bearing seizure and subsequent catastrophic failure. l


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