Case Study 6 - Gas based IPP

Waste Heat Recovery for Power Generation from Hot Gases exhaustedby Natural Gas fired three IC Engines of 6 MW capacity each making it total 18 MW IPP

System Description

Initial situation

• The Natural Gas fired IC Engines exhausts huge quantity of flue gas at high temperature.
• The flue gases from these engines were going directly to the stack.
• The large amount of heat contained in flue gas was being wasted into the atmosphere.

Challenges

• Design a waste heat recovery power generation system with limited allowable pressure drop in existing System.
• Provide a steam condenser with least amount of water consumption, for condensation of exhaust steam from Steam Turbine as the water was scarcely available at site.

Solution offered

• Waste Heat Recovery Boilers are installed on exhaust gases from the Natural Gas fired IC Engines.
• Heat is recovered from the exhaust gases and used for generation of the superheated steam.
• The superheated steam drives Steam Turbine Generator to produce electric power.
• The exhaust steam is condensed in Air cooled condenser, hence no water is consumed in condensation of steam.

Process Schematic

Results

Installation Photograph