I&MS Pakistan

System Comparision

DIESEL ENGINE GAS ENGINE GAS TURBINE
Thermal Efficiency <65% <65% Up to 90% (in case of Cogen)
Reliabilty >95% <95% >99%
Maintenance/Inspection Frequent Frequent Normally once in a year
Maintenance Cost High High Medium
Emission (NOx-O2 :15%) High Medium <30 ppm (in case od DLE model)
Maintenance Organization 10 - 20 people 10 - 20 people Neglible
Electricity Unstable and Hi Distortion Unstable and Hi Distortion Stable and Low Distortion
Instantaneous Load Application Up to 40% 10% - 25% 100% (for Smaller GT)
Vibration High High Low
Lube Oil Consumption High High Low
Noise Level High High Low (<85dBA)
Startup Time

Short

Long Medium
Layout Bi and Heavy Big and Heavy Compact and Light
Low Load Opera-ability >50% >50% As Low as 0%
Variety of Fuels Liquid Fuel Gaseous Gaseous and Liquid Fuel
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