Heat balance of tube wall Power Plant Simulation Component models Boiler ġ1Flow patternsPower Plant Simulation Component models Boiler Single phase liquidBubbly flowSlug flow Annular flowAnnular flow with entrainmentDrop flowSingle phase vapor ġ2Heat transfer regimesPower Plant Simulation Component models Boiler ġ3Pressure loss calculation : additive friction factor for geometry elements : tube wall friction Power Plant Simulation Component models Boiler ġ4Control ValveGoverning equations h1 = h2ρ1 = ρ2w = f ( p1, p2, h1, y )Control valve modelPower Plant Simulation Component modelsġ5PumpPump modelPower Plant Simulation Component modelsGoverning equations po = pi + pppp = fI (Ω, q)τh = fII (Ω, q)w(ho- hi) = τH Ωġ6Steam turbinePower Plant Simulation Component modelsGoverning equationsFlow equation, stodala lawEnergy equation hi – ho = (hi – hISO )ηPower output Pm = w (hi – ho)τm = Pm / Ω Momentum balancePower Plant Simulation Component models Boiler ġ0Fundamental equations-contd.Energy balance Model structuring approach based on Representation of plant componentsInterconnections between them Physical portsTHT : Thermo-hydraulic terminalDHT : Distributed heat transfer terminalTHHT : Thermo-hydraulic & heat transfer terminalHT : Heat transfer terminalMT : Mechanical terminalInternal model descriptionSoftware packages: APROS, LEGO, DYMOLA6Object Oriented modelingPower Plant Simulation ħObject Oriented modeling-contd.Modular structure for heat exchanging systemPower Plant Simulation ĨComponent models: BoilerPower Plant Simulation Vertical heated circular tubes, risers, of evaporator Homogeneous model Fundamental equationsHeat transfer calculationsFlow patterns Heat transfer regimes Pressure loss calculation Steady state simulationThermodynamic design of water&steam cycle Design of componentsPart load behavior Pressure loss calculation Transient Simulation Start up, shutdown behaviorThermal stressMassflow oscillationsDesign and study of control conceptsAnalysis of fault events5Steady state and Transient simulationPower Plant Simulation Introduction Summary & conclusions2OutlinePower Plant Simulation ģIntroduction Schematic of a simplified fossil-fuel fired power plantPower Plant Simulation ĤCombined Cycle Gas TurbineSchematic of simplified CCGTPower Plant Simulation Introduction Köstler University of Erlangen-NurembergGermanyIndo-German Winter Academy 2007
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Power Plant SimulationPresented by: Ashish KhetanIndian Institute of Technology GuwahatiTutors: Prof.