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A great amount of researches on thermodynamic cycles have been active in recent years, such as ORC (organic Rankine cycle), Kalina cycle, et al. However, the ultimate aim of such researches, which could even be traced back to more than one century ago, has not changed with a tireless pursuing to Carnot cycle. In exiting researches, the working fluid, as a medium for energy conversion, is commonly...
The application of zeotropic mixtures may lead to the occurrence of the EPTD (extreme point of temperature difference), i.e. the Pinch Point, between the working fluid and the HTF (heat transfer fluid) in heat exchangers. The positions of the EPTD are related to the system operating conditions. In this paper, the influence of the system parameters on the temperature profile of the fluid and the location...
A novel auto-cascade Rankine cycle (ARC) is proposed to reduce thermodynamics irreversibility and improve energy utilization. Like the Kalina cycle, the working fluid for the ARC is zeotropic mixture, which can improve the system efficiency due to the temperature slip that zeotropic mixtures exhibit during phase change. Unlike the Kalina cycle, two expanders are included in the ARC rather than a expander...
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