Heat engines convert heat into work—for example, moving a piston in a certain direction. For an engine to be 100% efficient, when the process is reversed—the piston returns to its original state—there ...

LiquidPiston's XTS-210 rotary engine is about the size of a basketball but could replace generator engines several times larger. A Connecticut-based company is on contract with the Army and Air Force ...

Combustion engines, the engines in gas-powered cars, only use a quarter of the fuel's potential energy while the rest is lost as heat through exhaust. Now, a study demonstrates how to convert exhaust ...

There's that relief that follows when power goes out and the sound of a generator kicks on. In just a few seconds, your lights are back, your A/C and fridge are up and running, and you don't have to ...

This weekend's heat wave could strain the power grid. Get ahead of potential power outages with power station deals from ...