what type of engine is the most efficient?

I think that depends what you call an engine.

 

If it is somthing that generates useable power for you to do work. Then I would say any kind of free power like water and solar.

The most efficient theoretical heat engin is something called the carnot cycle:

 

http://en.wikipedia.org/wiki/Carnot_cycle

 

Although in reality we have not achived anything close to this ideal...

The most efficient theoretical heat engin is something called the carnot cycle:

 

http://en.wikipedia.org/wiki/Carnot_cycle

 

Although in reality we have not achived anything close to this ideal...

 

 

is this engine possible to be made? and if its theoretical then has carnot himself tried to produce such and engine, and does any body have any ideas on being able to make energy out of nothing?

is this engine possible to be made? and if its theoretical then has carnot himself tried to produce such and engine, and does any body have any ideas on being able to make energy out of nothing?

 

It is probably not possible to make it.

 

People have attempted to make very efficient engins and not done too well.

 

You cannot make energy out of nothing you can only change one type of energy into another type of energy.

i would like to think body as a human engine can someone help me to figure out efficient human body ?