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My experience is from the electric utility business.... Gas turbines are inherintly less efficient than reciprocating engines, even at full power. They can be cleaner burning though if properly tuned. Gas turbines are popular with utilities simply becasue you can buy a higher horsepower turbine than you can a reciprocating engine. A 10,000 hp recip weighs 550,000 lbs. A similar turbines weighs MUCH less. Besides, where would you buy a 200,000 hp reciprocating engine? As stated above, gas turbines are efficient only between 75% and 100% capacity. Under 75% their efficiency goes to pot. Remember, the death of steam was the cost of the fuel to run them, not the amount of power they put out. Turbines are inherintly more reliable and easier to maintain because they have fewer moving parts. True, the parts they have can be quite expensive, but when properly operated they are a fairly low maintenance piece of equipment. Mark in Utah
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