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Compressible Flow Turbines

Compressible Flow Turbines. P M V Subbarao Professor Mechanical Engineering Department. Ideas to Utilize Natural Resources with Chemical/Nuclear Potential……. Turbines for Incompressible Flows Vs Compressible Flows. Fluid is a source of Energy & Means to Execute Thermodynamic Actions.

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Compressible Flow Turbines

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  1. Compressible Flow Turbines P M V Subbarao Professor Mechanical Engineering Department Ideas to Utilize Natural Resources with Chemical/Nuclear Potential……

  2. Turbines for Incompressible Flows Vs Compressible Flows Fluid is a source of Energy & Means to Execute Thermodynamic Actions Hydraulic Turbines & Wind Turbines Source of Energy cannot execute Thermodynamic Actions & Fluid is a Means to Execute Thermodynamic Actions Steam/Vapor Turbines & Gas Turbines

  3. Energizing Working Fluid through Mechanisms of Heat Transfer • The potential of natural resources (Fuels) is converted into Thermal Energy. • Mechanisms of Heat Transfer are implemented to transfer released thermal energy form source to working fluid. • Selection of suitable thermodynamic Process to execute Heat Transfer is highly valuable decision. • It took nearly 150 years to ………

  4. Exclusive Heat Transfer Process • Only heat transfer ….. No other actions. • Constant Volume Heat Addition using a control mass or • Constant Pressure Heat Addition using a control volume. • How to select thermodynamic parameters for heat transfer process?? • Should help in converting maximum potential of resource into Mechanical Power.

  5. i T e Ideal Compressible Flow Turbine : Isentropic Process :se=si No heat transfer. Change in kinetic and potential energies are negligible Assuming a single fluid entering and leaving…

  6. Development of Working Equation for an Ideal Compressible Flow Turbine Theoretical Equation for any thermodynamic process: A large change in pressure of the fluid is essential to convert maximum enthalpy of working fluid into mechanical power. The pressure of the entering working fluid at inlet must be higher than that of exiting fluid. Any other requirement ??????

  7. Thermo-economics of Resource Utilization Any state of working fluid which can exhibit a large change volume for a given change in in pressure will enhance the process of power generation. The thermo-economics can combine these two characteristics into a single …..

  8. Constant Pressure Heat Addition : Expenditure Vs Returns Vapour DT Liquid +Vapour Liquid Dh

  9. Steam Vs Gas as Working Fluid

  10. The Rankine/Brayton Cycle : Quantification of Energy Transactions

  11. The Rankine/Brayton Cycle : Quantification of Energy Transactions

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