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Turbine Inlet Cooling: A promising option for increasing Thailand’s electrical capacity

Turbine Inlet Cooling: A promising option for increasing Thailand’s electrical capacity. Chris Greacen chris@palangthai.org March 2007. Inlet cooling for existing turbines.

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Turbine Inlet Cooling: A promising option for increasing Thailand’s electrical capacity

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  1. Turbine Inlet Cooling: A promising option for increasing Thailand’s electrical capacity Chris Greacen chris@palangthai.org March 2007

  2. Inlet cooling for existing turbines • The laws of thermodynamics dictate that Thailand’s combined cycle natural gas power plants lose capacity when the weather is hot. • Inlet air cooling is a promising solution. • Well-established technology  more than 100 power plants in hot climates • Increases capacity and efficiency. • Inlet air cooling program for 13 EGAT power plants would contribute an overall 1140 MW of capacity • without having to fight with villagers to build new power plants. • Installation in months, not years • more cost-effective than building new power plants.

  3. Turbine Inlet Air Cooling fundamentals • Turbine power output decreases with increasing inlet air temperature • Power proportional to air inlet mass flow rate • Combustion turbines admit constant volumetric flow rate • High temperatures mass flow rate decreases • Worse heat rate with increasing inlet temperatures • Compressor less efficient

  4. Greatest generation capacity loss coincides with peak demand Source: www.turbineinletcooling.org

  5. To address this… • EGAT derates its power plants • For example a power plant that would produce 793 MW at 16 deg C is considered a “700 MW” plant (34 deg C) Thailand has considerable “hidden capacity”, if only the air going into the power plants were cooler.

  6. Turbine Inlet Cooling (TIC) overcomes the “hot weather/low output” flaw by cooling ambient air as it enters turbine

  7. Thailand’s peak is highest in hot weather (air conditioning) 4°C 15°C 27°C 38°C Source: www.tas.com

  8. Benefits of inlet air cooling • increased power output • reduced capital cost per unit of power plant output capacity • increased fuel efficiency • improved predictability of power output by eliminating the weather variable

  9. Hundreds of Examples • Database of over 100 inlet cooling installations. www.turbineinletcooling.org • hot weather power enhancement of up to 60%(average 31%) • Installations began in 1970s • Locations: • USA, Australia, Malaysia, Brazil, Mexico, Saudi Arabia,Portugal, India, Ecuador, Bolivia, Colombia, Iraq, NicaraguaThailand

  10. EGAT turbine inlet cooling plan:Absorption chillers fired by new CHP

  11. Inlet air cooling http://www.upcomillas.es/catedras/crm/descargas/2005-2006/Gas%20tubine%20Power%20Enhancement.pdf

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