The world needs a new source of energy, an unspillable source.

Generating power directly from heated water?

I fully understand the concept of a steam driven turbine to generate electricity (use of steam to turn turbine, which drives a generator to produce electricity), however is there a way of directly harnessing the potential energy in heated water (i.e. water in a supercritical state) without the use of turbines? If there are no current technologies available is anyone aware of any advanced research in to this field?