Heat to Power – Organic Rankine Cycle (ORC) System


Around 90% of the electrical energy used by a compressor, is lost to the atmosphere in the form of heat at a low temperature, especially through the lubricant oil cooling process.


In 2016-2017 D&T developed for a leading European compressor manufacturer a heat to power (H2P) system able to recover energy from the hot oil of the compressor lubrication circuit throug the Organic Rankine Cycle (ORC) generating electrical energy from the wasted heat.

A unique control system developed by D&T allowed the system perform optimally at broad range of the variable heat source parameters.


The package was built by the client, extensively tested and exibited at ComVac 2017.

Architecture Closed loop ORC system with pump, expander, evaporator, condenser and regenerator
Process media R236fa
Oil temperature 80-100°C
Oil flow rate Up to 160l/min
Cooling water temperature 15-17°C
Cooling Water flow rate 50l/min
Electrical output Power 2.5-4kW
Compliance EN 50438:2013

Note: TPG D&T business was dissolved in 2017. Its core Technical Team, who pioneered this project formed C2 Technology, to continue D&T’s business of developing innovative technologies for energy industry.

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