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Maximum Feasible Feed Water Heating

P M V Subbarao Mechanical Engineering, IIT Delhi. Maximum Feasible Feed Water Heating. P M V Subbarao Associate Professor Mechanical Engineering Department I I T Delhi. Closure of Regeneration process……. Thermodynamic Analysis of A Power Plant. HP Train. A Train of Shell & Tube HXs.

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Maximum Feasible Feed Water Heating

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  1. P M V Subbarao Mechanical Engineering, IIT Delhi Maximum Feasible Feed Water Heating P M V Subbarao Associate Professor Mechanical Engineering Department I I T Delhi Closure of Regeneration process……

  2. Thermodynamic Analysis of A Power Plant

  3. HP Train A Train of Shell & Tube HXs. LP Train

  4. T-S Diagram : Rankine Cycle with FWHs. Live Steam T 7 Dead Steam s

  5. Live Steam :15 Mpa & 5370C

  6. Optimum Number and Locations for Maximum Bleed Steam Work No Regeneration at High Pressure … Is it Ok??? Satisfied with the Optimization ? Any other Idea ?

  7. DPNL SH R H T R drum screen tubes Platen SHTR LTSH Economiser BCW pump Furnace APH Bottom ash Hardware for Realization of Constant Pressure Heat Addition

  8. Paths of Steam and Flue Gas Drum Water walls Economizer

  9. DPNL SH R H T R drum screen tubes Platen SHTR LTSH Economiser stack BCW pump Furnace APH ESP ID Fan Bottom ash Thermal Structure of A Boiler Furnace

  10. Sources of deviations of actual cycles from ideal cycle • Sources of deviations of actual cycles from ideal cycle performance include: • Heat transfer through the temperature difference between the thermal source and fluid passing through the steam generator unit; • Pressure drop in the steam generator (boiler) due to fluid frictional effects; • Pressure drops and heat losses to the surroundings associated with various components such as piping; • Pressure drops associated with throttling (e.g. for steam flow control);Fluid "frictional effects" as steam expands in the turbine; • Pressure drop in the condenser;Heat transfer through the temperature difference between fluid in the condenser and the thermal sink; • Fluid "frictional effects" where liquid is compressed in pumps; • Mixing of extracted steam and feedwater in open heaters; • Heat transfer between extraction steam and feedwater in closed heaters.

  11. Classification of Irreversibilities Internal Irreversibilities Friction & Heat Losses Ideal Cycle External Irreversibilities Heat Tranfer & Combustion

  12. RH Economizer Feed Water Thermal Structure of Steam Generator

  13. Sequence of Energy Exchange from Flue Gas to Steam FLUE GAS PLATEN SH EVAPORATOR RH PENDENT SH ECONOMIZER COVECTIVE SH

  14. Hot Flue Gas Thermal Structure SH Steam Rise in Enthalpy of Steam Convection HT Drop in Enthalpy of Flue Gas Convection & Radiation HT Mechanism of Heat Transfer Thermal Structure Sink /Demand Source/Supply Phenomenological Model

  15. Thot gas,in Thot gas,out Tcold steam,out Tcold steam,in Mechanism of Heat Transfer :Generalized Newton’s Law of Cooling • Rate of heat transfer from hot gas to cold steam is proportional to: • Surface area of heat transfer • Mean Temperature difference between Hot Gas and Cold Steam.

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