Analysis and application of maintenance strategies for Omnicane Thermal Energy Operations(St Aubin) Ltd
Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Maintenance costs at Omnicane Thermal Energy Operations (St Aubin) Ltd contribute a significant part ofthe unit cost of electrical energy produced and affect the profitability of the power plant. Hence it is necessaryand crucial to minimize maintenance costs by optimizing maintenance processes to make the plant morereliable and to run economically.The total maintenance cost for OTEOSAL from year 2008 to 2011 is seen to be increasing and has evendouble from 2008 to 2011. The cost of external labor during operation has increased by nearly four times dueto a lot of breakdown on different equipments and also the value of the spare parts store is seen to risebecause many spare parts are bought at random in fear of having a shut down due to unavailability of spareparts. These excess expenses contribute to a loss in profitability. With a good maintenance strategy, the totalmaintenance cost can be reduced by about 30%.Fault Tree Analysis (FTA) and Failure Mode Effect Analysis (FMEA) were done and allowed identifyingcritical equipments at the power plant and the Grate Stocker, one of the most important and criticalequipment for the plant was selected to perform a Quantitative Analysis of the FTAs. The probability offailure for the Grate Stocker is seen to be 0.98 and has reliability as low as 0.02. Quantitative Analysis of FTAand Pareto Analysis will allow having the right quantity of spare parts at the right time without overstocking.From this thesis, it can be said that combining different maintenance and management methods andstrategies based on FTA, FMEA and Pareto Analysis and all these well formalized and documented accordingto ISO 9001 will certainly allow the power plant to gain a lot like availability, reliability and even financiallyfrom maintenance and also will make OTEOSAL ready for new challenges appearing in the energy sector inMauritius.
Place, publisher, year, edition, pages
2012. , 207 p.
maintenance, reliable, analysis, strategy
Engineering and Technology Mechanical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-107167OAI: oai:DiVA.org:kth-107167DiVA: diva2:574931
Subject / course
Master of Science - Sustainable Energy Engineering
Nordstrand, Anders, Lecturer
Martin, Andrew, Assistant Professor