I had the opportunity to stop by the ElectraTherm In Booth an check out thier Green machine.
The basic concept is the creation of Electrical energy using waste heat, the machine can utilize heat from multiple sources and range in size from 50kw-500kw. The units can be used in parallel for projects up to 20mw’s in size.

ElectraTherm "Green Machine"
The ElectraTherm Waste Heat Generator (WHG) captures waste heat from almost any geothermal or industrial source to generate fuel-free, emission-free electricity. Built on a skid, it’s both modular and mobile, meaning it’s easy to transport and install as a single unit or in a series. Automated control systems permit unattended operation resulting in low operation and maintenance costs.
The ElectraTherm Green Machine, installed at Southern Methodist University in 2008, is the world’s first commercially viable WHG, using patented heat and pressure recovery technology that requires minimal heat (200 degrees F liquid) and is low cost, fuel-free and emissions-free. The system has exceeded expectations, reaching output well beyond its 50kW rating.
For more information Visit their Website