The Rankine Cycle is a thermodynamic cycle that converts thermal heat into mechanical work (that is converted into electricity), using water as working fluid. ORC or Organic Rankine Cycle technology uses an organic working fluid instead of water, in order to profit low-temperature heat sources.

The ORC thermodynamic cycle starts at the pump, where the working fluid is pumped to the evaporator. There, the working fluid recieves the heat from the heat source. The gas at the outlet of the evaporator is sent to the expander, where by its expansion is used to produce mechanical work (and then electricity by means of a generator). To increase the efficiency of the syste, the expanded working fluid is used to preheat the liquid at the inlet of the evaporator by means of a regenerator heat exchanger. The condensation of the vapor, where low temperature heat is released (which can be used conforming a cogeneration system) closes the cycle.

Rank® ORC machines use non-toxic and non-flammable working fluids, with low values of global warming potential (GWP) and zero ozone depletion potential (ODP). Rank® ORC products use high quality components and present high efficiency even at partial loads, increasing power produced and operational hours. Rank® equipment has plug-and-play connections for easy installation and user-friendly interface for easy operating and remote connection, with a control system that ensure maximized efficiency.