Contact number +7 (495) 374 74 14

Principles of ORC System Operation

The ORC cycle assumes the long cycle in closed system with zero emissions during the operation. The system uses organic media (heat waste) to expand the refrigerant and transfer it from liquid to steamy state. The Coolant transfers its energy by rotating of the Expander rotors that generate electricity. After discharging steam in the Expander, the Coolant is condensed and passes to liquid state to return to the Evaporator for new expansion process.




Rotor profile is the most important element in the Screw Expander. Combination of digital profile calculation and high-precision grinding processing technology gives the best rotor performances and quality, which are guaranteed by the Screw Unit of ORC System. Y-profile of 2 rotors is specially designed for the Screw ORC Expander, which proved to be highly efficient, highly reliable, with low noise. Such high-tech profile enables using of semi-dry lubricant. The profile has 90% of isotropic efficiency. This is the best isotropic efficiency in the global ORC industry.

Key Remarks:

The higher isotropic efficiency of Expander, the shorter payback time of investments and the lower relative cost per the ORC Station power unit.

The higher results of isotropic efficiency, the higher thermal efficiency:

Thermal efficiency is the ratio of useful generated electricity and input cycle heat. Effective power is the ratio of power generated by the Generator to power consumption per the ORC system cycle.