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Turbine-Generator Repair Facility

Tour our state-of-the-art 250,000 square foot MD&A Turbine-Generator Repair Facility! Through over 30 years, we’ve earned a reputation as the trusted, one-stop-shop for power generators. Capabilities ranging from gas turbine repair, steam turbine repair, generator, machining, valves repair to our modern high speed balance facility. View our St. Louis Repairs Shop Tour Video below and […]

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Thermodynamic Analysis on a Steam to Combined Cycle Plant Conversion

Heat Balance Example | Thermodynamic Analysis

Mechanical Dynamics & Analysis (MD&A) experts recently performed a thermodynamic analysis to assist our client in converting their coal and natural gas plant to combined cycle operation. The customer was able to locate a gray market Gas turbine and Heat Recovery Steam Generator (HRSG). Our team modeled how each component would interact with one another, […]

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D11 Problems & Repair Solutions

D11 Bowed Rotor | D11 Problems & Repairs Solutions

The common GE® D11 steam turbine, a single-casing HP/IP design used extensively in combined cycle applications, is demanding increased focus during normal outages, and ongoing attention for reliability, efficiency, and plant safety. Fundamental reasons are intensified by market-driven calls for continued cycling and low-load operation. Units modified for higher efficiencies and compatibility with 7FA Gas […]

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D11 Retrofit Solutions in light of Early Life Expectancy 

D11 Retrofit

Relative to historical industry experiences, D11 steam turbines have come of age at an early stage in their lifecycle and are strong candidates for retrofit solutions.   The most common reasons reported to MD&A for prompting retrofit consideration include (1) reliability issues, (2) technology obsolescence and (3) changes within plant operating missions and steam cycles (e.g. […]

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Petro Vietnam’s Rapid Bearing Repair and Journal Machining

bearing repair

At Petro Vietnam Vung Ang 1 Thermal Power Plant, Mechanical Dynamics & Analysis (MD&A) experts recently repaired damaged babbitt bearings and refurbished journals for a customer on a steam turbine-generator with the unit in an assembled (rotor-in) condition. The unit was forced from service due to turbine bearing failures. In a quick turnaround, journal refurbishment […]

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Steam Turbine Reheat Stop Valves Restoration

Valves Restoration

Mechanical Dynamics & Analysis (MD&A) performed a complete reheat stop valves restoration along with one LP stop valve. These RH stop valves on a Siemens Westinghouse® unit had not been fully restored for 14 years.   Pre-outage planning took place between our team and key plant personnel.  Upgraded valve materials were designed and manufactured, and […]

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Structured Remaining Life Assessment

Structured Remaining Life Assessment

Mechanical Dynamics & Analysis (MD&A) assessed both the current condition and remaining life of a 1968 Vintage fossil-fired 445MW D8 steam turbine following 700 starts and 345,000 operating hours. The owner wanted to know if the asset was safe to continue to operate and if it could be considered for repowering for another twenty years […]

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Throttle Valve Seat Upgrade

Throttle Valve Seat Upgrade

MD&A was contracted to modify both the left and the right-hand side throttle valves on a Westinghouse® steam turbine. The work was done at the power plant and was designed to reduce distortion on the valve casing, as well as the bonnet fit, and stud threads. As the on-site work was being performed, highly skilled […]

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Mechanical Dynamics & Analysis LLC   |   19 British American Blvd., Latham, NY 12110   |   P (518) 399-3616   |   F (518) 399-3929