ORC systems are able to give to thermal waste an economic value, often related to the industrial sector. The acronym ORC means Organic Rankine Cycle, that is, “organic fluid rankine cycle”.
Starting from the recovery of the above-mentioned thermal waste, the ORC turbines allow the production of energy for self-consumption allowing a 360° energy efficiency operation. Examples of waste heat that can be used with an ORC turbine are post-combustion fumes, iron smelting fumes – glass production – cement production and more.
Its advantages are: no water treatment plant or make up water, automated operation, competitive capital costs, leading to fast payback, high efficiency at a variety of operating temperatures and loads, fast start up and shut down, flexible placement. Applications fields are gas engines, diesel engines, biogas engines, gas turbines and compressor stations.
A heat recovery system can extract the thermal power from engine’s or turbines’ exhaust to feed the ORC module thanks to the so said intermediate fluid.
The operating principle of an ORC turbine is the same as that of a steam turbine: a fluid is evaporated with heat and is fed into a turbine; At this point the pressurized steam expands and causes a thrust on the turbine impeller blades, making them rotate.
With an electric generator mounted on the turbine shaft, the mechanical power is converted to electric power, thus generating electricity generation.
The life cycle of the vaporized organic fluid is the following: it goes through the cycle, arrives in the condenser, becomes liquid again and passes through the pump. At this time it is again at the starting point of the cycle again.
Waste heat recovery is a remarkable opportunity all of us can benefits from various point of views.
For more information http://exergy-orc.com/applications/heat-recovery-from-industrial-process