ORC-Technology - Waste heat is converted into electricity

The ORC method is a classic vapour cycle process.

The principle known as Organic Rankine Cycle was named after the Scottish physicist and engineer William Rankine (1820-1872), who is also considered one of the inventors of thermodynamics. 

Instead of using steam, the ORC process runs with organic media like alcohols, (silicone) oils, or coolants which have more efficient thermodynamic properties than water. There is therefore the possibility of selecting the optimum fluid for each application.

The cyclical process then always runs under the same conditions. The waste heat flow from a process or from an appropriate heat source is used to vaporise an organic medium in a cyclical process at moderate pressure, and this is then relaxed in an expander at a lower pressure, fed to a condenser, and then compressed to the higher pressure by the revaporisation.

For this, DeVeTec developed a piston-based ORC vapour expansion engine with a very large single step pressure difference, which can be variably operated in the output range between 50 and 270 kWel.