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NESTER, RYAN TIMOTHY. Organic Rankine Cycles: A Comparative Study and Analysis of Multiple Applications.

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NESTER, RYAN TIMOTHY. Organic Rankine Cycles: A Comparative Study and Analysis of Multiple Applications. ( nester-ryan-timothy-organic-rankine-cycles-comparative-study )

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1.7 Manufacturers: Ormat is a world leader of geothermal power plant technology and has developed the Ormat Energy Converter (OEC). The OEC is essentially a commercially available ORC that is used in waste heat applications. OEC’s can be purchased in sizes ranging from 250 kW to 20 MW. The OEC can be either air-cooled or water-cooled but must have a liquid as the heat input to the OEC. The OEC turbines are moisture free and operate at about 1500 rpm with a very high efficiency. The OEC uses a dry refrigerant as the working fluid and does not incorporate a recuperator. Ormat would not divulge the operating characteristics or exactly which dry refrigerant they were using. Infinity Turbine is a small, relatively unknown company that manufactures turbines and ORC systems. Infinity Turbine sells ORC’s in the range of 1 kW up to 250 kW. The smaller systems are build/design your own system where you can purchase the components separately and build it yourself and the larger systems are almost turnkey systems where the ORC can be installed and operated. Infinity Turbine uses R-245fa as the working fluid and the operating conditions vary depending on the size of the system purchased. The ORC’s sell for about $1500/kW and require liquid as the heat input and as the cooling medium. Most of the ORC’s incorporate a recuperator. Turboden is a division of Pratt and Whitney that is devoted to clean energy production and is based out of Italy. Turboden has ORC heat recovery units available from 400 kW to 5 MW. Turboden’s ORC’s prefer thermal oil as the heat input, but can use water, and require a water-cooled condenser. All of Turboden’s units are equipped with recuperators and claim to 20

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