ENVA Energy GmbH
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Our ORC technology is uniquely capable to generate power profitably from low temperature heat sources (>85°C). At higher temperatures our technology allows for the use of water instead of expensive (and often dangerous) organic media.

ORC Module

ENVA Energy concerns itself with the utilization of waste heat for the generation of electricity in ways that are meaningful both economically and in energy terms. According to a study by the Fraunhofer UMSICHT Institute from the year 2006, there is a technical potential in Germany alone for the use of waste heat in a volume of 8.4 GWel. On a worldwide scale, the figure is nearly 264 GWel in terms of the following energy sources: geothermy, the combined heat and power generation sector, special gas applications, and industry.

A highly promising approach in this area is offered by ORC (Organic Rankine Cycle) technology. With this technology, instead of water, an organic medium or refrigerant is vaporized, the energy used in an expansion unit, similar to that to be found in a conventional power station, and finally condensed once more in the recooling unit. The mechanical energy produced in the process is converted by a generator into electric current, which can then be used in-house or fed into the public grid.

ORC Modul
ORC-Modul 3

ORC technology has been in use for power generation for many years, e.g. in biomass power plants, and in itself, therefore, is not a newcomer to the energy market. However, utilizing the potential of waste heat with a temperature below 90 °C for the production of electricity in a way that makes both economic and energy sense is indeed an innovation ‒ one which ENVA Energy has now succeeded in bringing to market readiness in the shape of its own in-house development, the ORC Module.

At the heart of this patented system is a special rotary piston expander of the kind also used in the ENVA Energy’s Energy Module of ENVA Energy, which has the advantage compared to conventional turbines of being able to achieve a comparatively high level of internal efficiency even at very low evaporation pressures of the working medium.

Questionnaire ENVA ORC-Module

1. What kind of heat is present?
m³/h or kg/s
m³/h or kg/s
2. At what temperature level is the heat available?
°C (T2 ~ AAT)
3. Are detailed information on the waste heat known?
4. If one of the above-mentioned Questions are not known but the thermal performance of the heat flow?
5. If its the waste heat from a CHP, please specify the the complete heat output are used for power generation:
6. Is an exhaust gas heat exchanger integrated?
7. Availability of the waste heat:
h/ year
Business contact: