Abstract
Maintenance is essential for preserving gas turbine engineering system functionality during equipment life cycle. Heavy-duty gas turbine (HDGT) engineering systems are often quite complex to maintain. Therefore an effective condition based maintenance (CBM) program is vital to reduce downtime, improve equipment reliability and cost optimization. It is estimated that 50 to 75% of gas turbine maintenance cost is related to the replacement and repair of hot section parts. Furthermore, the maintenance intervals of the engine is governed by the hot section material durability, and the replacement of these components is the largest contributor to determining maintenance related equipment availability. This paper investigate multiple thrust bearing failures on gas turbine driven centrifugal compressor application in a liquefied natural gas (LNG) plant. A root cause failure analysis (RCFA) approach was conducted to determine the failure mode and its consequencies. Process instability is believed to be the cause of several thrust bearing failures. Downtime analysis is presented to estimate the the loss of production (LPO).
Published Version
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