Power plants are more efficient at generating electricity, mechanical work, etc. than small generators. They are certainly not more efficient at generating heat than just burning the gas is.
Why not? When you use a stove, look how much of the flame is open, and take note of how much heat is being thrown off and not going into your food. When gas is burned in a plant, much more of that heat is captured.
But it’s really a moot point, because the goal is to change the power plants to clean energy sources anyway.
But it’s really a moot point, because the goal is to change the power plants to clean energy sources anyway.