Bourji A.,WorleyParsons in Houston |
Barnhart J.,WorleyParsons in Houston |
Winningham J.,WorleyParsons in Houston |
Winstead A.,WorleyParsons in Houston
Chemical Engineering | Year: 2010
An organic Rankine cycle (ORC) system can remove heat from a fluegas stream and utilize this waste heat to generate electricity. An ORC resembles a typical Rankine cycle, but instead of circulating water as the working fluid, an ORC uses a refrigerant, typically an organic fluid such as ethane, propane, propylene or various name-brand refrigerants. By comparison, an ORC can efficiently operate at temperatures below the boiling point of water, from 212°F to as low a temperature as desired for a given application. If properly designed, the use of an ORC system can provide a facility with an opportunity to produce additional electric power without an increase in air emissions. A typical ORC installation will usually generate a significant surplus of electricity compared to the power that its own equipment uses, so an ORC system's net utility costs are generally less than zero. An ORC system is therefore a minimal contributor to a plant's overall operating costs, which is another advantage of using ORC technology to improve both fluegas treatment and onsite power generation.