These scientists also found that the greater the pressure created by the water in a chamber the higher the temperature at which it boiled. This gives greater energy to teh piston. The oldest form of water created energy uses the turbine principle. This says that if you attach a series of blades or paddles to a wheel and then direct water with great force the turbine will turn. In the case of water mills the force was created by the rate of the flow of a river.