Operation And Maintenance Of Diesel Power Generating Plants

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PresentsOperation and Maintenance ofDiesel PowerGenerating Plantswww.idc-online.comidc@idc-online.com

CopyrightAll rights to this publication, associated software and workshop are reserved. No part ofthis publication or associated software may be copied, reproduced, transmitted or storedin any form or by any means (including electronic, mechanical, photocopying, recordingor otherwise) without prior written permission of IDC Technologies.DisclaimerWhilst all reasonable care has been taken to ensure that the descriptions, opinions,programs, listings, software and diagrams are accurate and workable, IDC Technologiesdo not accept any legal responsibility or liability to any person, organization or otherentity for any direct loss, consequential loss or damage, however caused, that may besuffered as a result of the use of this publication or the associated workshop andsoftware.In case of any uncertainty, we recommend that you contact IDC Technologies forclarification or assistance.TrademarksAll terms noted in this publication that are believed to be registered trademarks ortrademarks are listed below:IBM, XT and AT are registered trademarks of International Business MachinesCorporation. Microsoft, MS-DOS and Windows are registered trademarks of MicrosoftCorporation.AcknowledgementsIDC Technologies expresses its sincere thanks to all those engineers and technicians onour training workshops who freely made available their expertise in preparing thismanual.

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PrefaceMost industries relying on electric power for their operation prefer to source their electrical supplyfrom the local power utility grid. But those who require a reliable alternate source of power opt for anin-plant generating source to ensure an adequate backup to the grid supply. This has become an issueeven in countries where reliable power has normally been taken for granted. As the complexity ofpower grids increases, instances of cascaded tripping and total system collapse seem to be happeningmore frequently than ever before.There are several options for establishing an in-plant power backup source. Generating sets with adiesel engine as the prime mover is one of the most preferred options in industries today, particularlyin those industries where prolonged power outages may cause equipment damage, create unsafeconditions, require long process restarting time, and result in extensive disruption of production andconsequently failed delivery schedules and loss of customer goodwill.In addition, most power utilities themselves set up generating plants based on diesel engines forvarious purposes. These include: meeting peak power demands by having generating sets which can bestarted and brought in quickly; having a reliable self-starting power source to restart otherconventional steam generating plants (which always require another power source for start-up); as acritical power source to prevent equipment damage/unsafe conditions in large conventional generatingplants and ensure safe plant shutdown during major grid outages, and so on.In this book, we will deal with the fundamentals of diesel engines and engine-based powergenerating sets. We will discuss various liquid and gaseous fuel options available and fuel storagerequirements for different fuels. We will cover the principles involved in planning the plant layout fora typical diesel power generating station. We will also touch upon the care and maintenance of dieselgenerating plant equipment and various tests that need to be performed right from the acceptance ofequipment at the supplier’s works, to commissioning tests and further periodic tests during the plantoperational phase.People who will find this book useful include: Consulting Engineers Electrical Engineers Utility engineers Data Systems Planners and Managers planning standby generation capacity Building Service Designers Power System Engineers Maintenance Engineers Electrical Inspectors Electrical Contractors ElectriciansYou will gain knowledge on the following: The basics of electricity generation Internal combustion engines as prime movers Diesel engines as a versatile prime mover for energy generation Fuels used in Diesel power generating plants Generators and engine-generator assemblies Layout configurations of engine based power plants Testing and commissioning Operation and maintenance

PrefaceWe assume basic electrical engineering knowledge as well as some preliminary knowledge of powergeneration and use. However, the subject is dealt with from fundamentals and therefore even thosewith no exposure or experience in these specific topics should be able to understand the issues and beable to apply them to their work needs.

Table of ctionEnergy sourcesAC and DC powerSingle phase and three-phase AC powerPrime moversPower plant components/typesEngine typesDiesel power plantsAdvantages of Diesel power generationSummaryEngine Technology and ClassificationsEngine ProcessesReciprocating EnginesTypes of Ignition EnginesSpark and Compression Engines - ComparisonDual Fuel EnginesFuels used in enginesSpeed ClassificationsService ClassificationsSummaryEngine Design and ISO Ratings1133611131518192121222529323335363839Design CharacteristicsBasic FormulaeAmbient Conditions on PerformanceTurbocharger SchemesJacket Water Heating SystemISO StandardsPerformance and Efficiency EnhancementsSummary3941434346474950Fuels for DG sets and Fuel oil system51Fuels in Power Plants51

.116.12Crude oil (CRO)Diesel fuelEconomics of fuel selectionTypical pressure and temperatures of the CRO systemViscosityDensity and TemperatureSpecific Heat and TemperatureViscosity conversionFuel FiltersFuel nozzles and ignitersEmission ControlStorage RequirementsSystem layoutsSummary5254565659616162636566676769Lube oils and lubrication systems of Diesel engines 71Lube oil functions and definitionsLube oil SpecificationsLube Oil TypesLubrication system schematicsViscosity Temperature ConversionSummaryGeneratorsPrinciple of operationGenerator ComponentsAC Generator TypesGenerator ConstructionInsulationLV and MV generatorsTypical circuitryLoad types and Generator sizingGenerator earthingFaults and protectionPerformance evaluation and 103109109

Diesel generating set assembliesCoupling RequirementsMounting RequirementsLayout RequirementsParalleling of multiple DG setsStandard Control panelsSynchronization PanelsSummaryOther componentsEngine starting methodsStarting CharacteristicsStep load requirementsStandby RequirementsGenerator sizingStarting-battery sizingAuto start and Auto transfer schemesAuto Transfer Switch (ATS)SummaryDG power plant layout planningLayout planning and its importanceDiesel generator configurationsSpecific requirements in layout design for DG plantsTypical layout configurations of DG plantsFuel storage systemAir Intake SystemExhaust SystemAuxiliary power systemSummaryTesting and commissioning of DG power plantsIntroductionFactory TestsPre-commissioning checksPre-commissioning TestsPerformance 156158160162

11.1011.11Fuel and Lube oil Consumption TestsElectrical system testsSummaryOperation and maintenance of DG power plantsSafety RequirementsMaintenance TechniquesOperation MonitoringMaintenance PhilosophyMaintenance Planning and schedulingSpares and inventory ManagementMaintenance toolsInspection, overhaul and repairTraining of O&M 73177178180180182188189191Appendix AQuality Assurance checklists193Appendix BCourse Exercises207

1IntroductionIn this introductory chapter, we will discuss various sources of energy, the generation ofelectric power and the prime movers for power generation. We will briefly discuss thetypes of engines used, in particular the diesel engine and its advantages when used asprime mover in power generating plants.Learning objectives 1.0Energy sourcesThe choice between AC and DC powerSingle phase vs. three-phase AC powerPrime movers used for power generationPower plant components/typesTypes of engines used in power generationDiesel engine and its advantages in power generation applicationsEnergy sourcesThe pioneering experimental work of Michael Faraday on electromagnetism and thedynamo (electrical generator), which he invented, paved the way for today’s electricalpower systems. The invention of the electric lamp by Thomas Edison was a majorbreakthrough in promoting the use of this new energy form for residential andcommercial applications. The development of electric motors, which could be used as thedrive for machinery, gave a further boost to its widespread use in all types of industrialapplications. All these led to the establishment of centralized power generation facilitiesto produce electricity in an efficient way and carry it to human settlements for enhancingthe standards of living and quality of life.Electricity is produced in many different ways in today’s world. The generation ofelectric power primarily involves conversion of some naturally available form of energy(such as chemical energy in a fuel) into electrical energy. It was in the year 1903, justover hundred years ago, that the first steam turbine generator, pioneered by Charles Curtiswas put into operation at the Newport Electric Corporation in Newport, Rhode Island.

2 Diesel power generating plantsSteam still remains the main energy transfer medium in many power plants where it isproduced by heating water in Steam Generating Units (commonly called ‘Boilers’) usinga variety of fuels. Coal is still one of the major

In this book, we will deal with the fundamentals of diesel engines and engine-based power generating sets. We will discuss various liquid and gaseous fuel options available and fuel storage requirements for different fuels. We will cover the principles involved in planning the plant layout for a typical diesel power generating station.

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