Re: Heat engines
Natural gas generators can get close to 60% efficiency because they're a 2 step process.
1: Gas turbine engine and attached generators
2: Bog standard steam plant driven from the turbine's waste heat.
That's why they're called cogeneration systems. Standalone peaking plants are called OCGT (open cycle Gas turbines) and hideously inefficient, although cogen plants can provide some peaking capacity on the turbine side.
Biting the hand that feeds IT
