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METHODS OF INCREASING NET WORK OUTPUT OF ORGANIC RANKINE CYCLES FOR LOW-GRADE WASTE HEAT RECOVERY WITH A DETAILED ANALYSIS USING A ZEOTROPIC WORKING FLUID MIXTURE AND SCROLL EXPANDER PDF

680 Pages·2015·12.7195 MB·other
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Preview METHODS OF INCREASING NET WORK OUTPUT OF ORGANIC RANKINE CYCLES FOR LOW-GRADE WASTE HEAT RECOVERY WITH A DETAILED ANALYSIS USING A ZEOTROPIC WORKING FLUID MIXTURE AND SCROLL EXPANDER

Description:
An organic Rankine cycle (ORC) is a thermodynamic cycle that is well-suited for waste heat recovery. It is generally employed for waste heat with temperatures in the range of 80 °C – 300 °C. When the application is strictly to convert waste heat into work, thermal efficiency is not recommended as a key performance metric. In such an application, maximization of the net power output should be the objective rather than maximization of the thermal efficiency. Two alternative cycle configurations that can increase the net power produced from a heat source with a given temperature and flow rate are proposed and analyzed. These cycle configurations are 1) an ORC with twophase flash expansion and 2) an ORC with a zeotropic working fluid mixture (ZRC).
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