Optimal DesignLayout of Steam and Gas Turbine Combined

Optimal Design/Layout of Steam and Gas Turbine Combined Cycles P M V Subbarao Professor Mechanical Engineering Department Minimization of Heat Rejection Temperatures….

Gas Turbine Exit Gas Temperature : Source for Bottoming Cycle FUEL GAS INLET AIR INLET TURBINE COMP CC G

Performance of Topping Cycle • Cost to benefit ratio of topping Cycle • Temperature of Turbine Exhaust Gas, T 5 G

Effect of Pressure Ratio : Topping Cycle

Schematic Diagram of a Simple HRSG Effectiveness of HRSG Total Thermal power available with Turbine exhaust: Thermal power transferred to Bottoming Cycle:

Layout of Simple Bottoming (Rankine) Cycle

Schematic Diagram of a Simple HRSG Thermal power transferred to Bottoming Cycle:

Anatomy of Temperature vs Heat Exchange Diagram T 4 G TG, PP T 5 G TTD S GA FLUE R TE EA R PE Pinch Point R SE I OM ON EC Tfw Design constraint: Design termination: SU EVAPORATOR H TSH

The Pinch Point & Unavailable Enthalpy

Performance of Combined Cycle • Cost to benefit ratio of combines Cycle • Temperature of Stack Exhaust Gas, T 4 G

Effect of Pressure Ratio : Combined Cycle

Simple Brayton Vs Combine Cycle

Techno-Economics of Pinch Point Re lat ive Ca pi tal cos t of Bo HR tto mi SG ng Cy cle Po we r

Effect of Bottoming Cycle Parameters : Live Steam Pressure

Effect of Bottoming Cycle Parameters : Live Steam Pressure e am Ste bin r u T put t u O nt nte o C e stur Moi HRSG Effectiveness

Effect of Bottoming Cycle Parameters : Live Steam Temperature Steam Turbine Output Mo ist ur e. C on ten t HRS G Ef fecti vene ss

Design of HRSG