Journal Article10.1016/J.APENERGY.2014.10.052
Design and performance prediction of radial ORC turboexpanders
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TL;DR: In this article, a zero-dimensional model for the design of radial turbo-expanders for ORC applications is discussed, with special reference to the estimation of losses and efficiency; a comparison between different fluids (R134a, R1234yf, R236fa, R245fa, Cyclohexane, N-Pentane) is presented and discussed, referring to a typical small-size application (50kW).
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About: This article is published in Applied Energy. The article was published on 15 Jan 2015. The article focuses on the topics: Design tool & Specific speed.
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Citations
Small Scale Organic Rankine Cycle (ORC): A Techno-Economic Review
TL;DR: In this paper, the state-of-the-art of the organic rankine cycle (ORC) technology for small-scale power plants is presented from a technical and economic perspective.
160
Design guidelines for the choice between single and dual pressure layouts in organic Rankine cycle (ORC) systems
TL;DR: In this article, the dual pressure layout is compared against the single pressure one at subcritical conditions in the utilization of a geothermal heat source in the range 100-200°C, and considering a set of working fluids wide enough to take advantage of the features of both layouts.
115
Predicting the optimum design of single stage axial expanders in ORC systems: Is there a single efficiency map for different working fluids?
TL;DR: In this paper, the authors provide a design criterion of axial flow turbines which gives a reliable estimate of their efficiency for a wide range of operating duty specifications and working fluids, and a generalized efficiency map is obtained which can be easily integrated into a comprehensive thermodynamic cycle analysis and optimization to account for the real turbine performance.
79
HFOs as substitute for R-134a as working fluids in ORC power plants: A thermodynamic assessment and thermal stability analysis
TL;DR: In this paper, the potential replacement of HFC-134a in ORC applications by two low-GWP refrigerant fluids, namely HFO-1234yf and HFO1234ze(E), was investigated.
74
Design of micro radial turboexpanders for ORC power cycles: From 0D to 3D
TL;DR: In this article, the 3D design and analysis of a 5'kW micro turbo expanders for small, distributed ORC power units is proposed, starting from a recently developed 0D design tool, which was initially applied to 50'kw radial turbines.
70
References
•Book
Fluid mechanics, thermodynamics of turbomachinery
S.L. Dixon
- 01 Nov 1966
TL;DR: The Fluid Mechanics and Thermodynamics of Turbomachines (FLMTH) as discussed by the authors is a classic text in the field of turbomachines, which has been used as a core text in both undergraduate and graduate level courses.
869
Energetic and economic investigation of Organic Rankine Cycle applications
TL;DR: The use of organic working fluids for the realization of the so-called organic rankine cycle (ORC) has been proven to be a promising solution for decentralized combined heat and power production (CHP) as discussed by the authors.
536
Internal Combustion Engine (ICE) bottoming with Organic Rankine Cycles (ORCs)
Iacopo Vaja,Agostino Gambarotta +1 more
TL;DR: In this article, a specific thermodynamic analysis in order to efficiently match a vapour cycle to that of a stationary Internal Combustion Engine (ICE) is presented. But the analysis is limited to the case of a single-cylinder engine.
458
Turbomachines—A Guide to Design Selection and Theory
O. E. Balje,David Japikse +1 more
Abstract: Keywords: turbomachines ; conception Reference Record created on 2005-11-18, modified on 2016-08-08
Exergy based fluid selection for a geothermal Organic Rankine Cycle for combined heat and power generation
TL;DR: In this paper, the authors compared series and parallel circuits of an ORC and an additional heat generation for geothermal resources at a temperature level below 450 k. The results showed that due to a combined heat and power generation, the second law efficiency of a geothermal power plant can be significantly increased in comparison to a power generation.
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