Evaluating the Performance of a Rotary Vane Expander for Small Scale Organic Rankine Cycles Using CFD tools

Montenegro, Gianluca; Torre, Augusto Della; Fiocco, Marco; Onorati, Angelo; Benatzky, Christian; Schlager, Gerd

doi:10.1016/j.egypro.2014.01.119

Cited by 30 publications

(9 citation statements)

References 13 publications

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“…Although the influence of the lubricating oil and the leakage flow was not considered. Simplified porous media approach was used to model tip leakage flow in the 3D CFD model for a rotary vaned expander presented by Gianluca et al [7]. The model allowed to estimate the effect of the leakage flow on volumetric efficiency.…”

Section: Introductionmentioning

confidence: 99%

A Simplified Modeling Approach for Rolling Piston Compressors

Farkas

Szente

Suda

2015

Period. Polytech. Mech. Eng.

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A new type of thermodynamic machine was designed and prepared for testing to evaluate its capability in extracting mechanical energy from low enthalpy heat sources. The system was completed with a newly designed rotary piston compressor and expander to improve efficiency. A numerical model was set up using commercially available CFD code ANSYS Fluent to evaluate the performance of the compressor and to identify the fluid dynamic related loss sources. In attempt to increase computational efficiency 3D and 2D computations were compared to find the simplest model which provides sufficient information to capture the important heat transfer and fluid mechanical features.

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Section: Introductionmentioning

confidence: 99%

A Simplified Modeling Approach for Rolling Piston Compressors

Farkas

Szente

Suda

2015

Period. Polytech. Mech. Eng.

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“…The interesting results of the numerical and analytical modeling of multi-vane expanders operation in ORCs were presented in [89,90] In [89], the authors presented a modeling of a multi-vane expander featuring an elliptical cross-section of a cylinder designed for application in small-scale ORC systems, which took place at Politecnico di Milano (Italy) in cooperation with the Magna Powertain Company (Austria). Modeling was carried out using OpenFOAM software.…”

Section: University Of Nottingham (England)mentioning

confidence: 99%

Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities

Kolasiński

2019

Energies

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This paper reviews the applications of the multi-vane expanders in ORC (organic Rankine cycle) systems. The operating principle and design of the ORC systems are addressed in the introduction. Then, there is a brief review of the expanders applied in small-power and micro-power ORCs, and a discussion of the multi-vane expander design and operating principle as an introduction to a comprehensive review on the applications of the multi-vane expanders in ORC systems. The different features of the multi-vane expanders—i.e., the design of the expander, its geometrical dimensions and operating conditions, durability, applied working fluid, obtained power output, and efficiency—are analyzed in this paper. This review clearly indicates that multi-vane expanders are a promising alternative to the different types of the expanders applied in ORC systems.

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“…The idea of Rotary Vane Expanders for ORC application is not new. However, only few recent published papers present experimental measurement and evaluations of Rotary Vane machines [25,26]. The existing primary models difference be inherent in the vane thickness calculations.…”

Section: Rotary Vane Overviewmentioning

confidence: 99%

Expander selection for an on board ORC energy recovery system

Pantano

Capata

2017

Energy

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This paper deals with the comparison between volumetric expanders (screw, scroll and rotary vane) and an Inlet Forward Radial (IFR) micro turbine for the exploitation of an on board Organic Rankine Cycle (ORC) energy recovery system. The sensible heat recovered from a common bus engine (typically 8000cc) feeds the energy recovery system that can generate sufficient extra power to sustain the airconditioning system and part of the auxiliaries. The concept is suitable for all kind of thermally propelled vehicles, but the application considered here is specific for an urban bus. The ORC cycle performance is calculated by a Process Simulator (CAMEL Pro) and the results are discussed. A preliminary design of the considered expanders is proposed using ad-hoc made models implemented in MATLAB; the technical constraints inherent to each machine are listed in order to perform the optimal choice of the expander based on efficiency, reliability and power density. Last step will be the selection of the expander that suites the specific technical and design requests. The final choice relapsed on the screw motor, for it is the best compromise in terms of efficiency, lubrication and reliability.

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Evaluating the Performance of a Rotary Vane Expander for Small Scale Organic Rankine Cycles Using CFD tools

Cited by 30 publications

References 13 publications

A Simplified Modeling Approach for Rolling Piston Compressors

A Simplified Modeling Approach for Rolling Piston Compressors

Application of the Multi-Vane Expanders in ORC Systems—A Review on the Experimental and Modeling Research Activities

Expander selection for an on board ORC energy recovery system

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