Experimental investigation and exergy analysis of the performance of a counter flow Ranque–Hilsch vortex tube with regard to nozzle cross-section areas

Dinçer, Kevser; Avcı, Ahmet; Baskaya, Senol; Berber, Adnan

doi:10.1016/j.ijrefrig.2010.03.009

Cited by 67 publications

(25 citation statements)

References 26 publications

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“…The turbulent flow behaviour has been reported in the investigations of the flow pattern in a vortex tube and was clearly shown by the turbulent intensity of the flow, particularly by the peak value of the intensity in the central area of the tube [1,41,46]. The increased entropy of the system also results in a loss of total energy, which has been noticed in previous investigations [18,31,35,36,42,45,[47][48][49][50]. A free expansion process is typically achieved by allowing the gas to expand into a vacuum.…”

Section: Discussionmentioning

confidence: 56%

The Expansion Process in a Counter-flow Vortex Tube

2015

J Vortex Sci Technol

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The process of temperature separation in a Ranque-Hilsch vortex tube is dependent on a multitude of factors, such as the pressure gradients, flow stagnation and mixture, energy transfer between different flow layers and heat transfer between the tube and the ambient air. The pressure gradient in an expansion process within a vortex tube has been proposed as the dominating reason for the temperature drop. However, at present, there is no general agreement within the research community for the expansion process itself, primarily due to the complexity of the internal flow conditions in the tube. Therefore, in the present article, a deeper insight into the separation mechanism within a vortex tube is presented, based on an analytical analysis using different expansion models, including isentropic expansion, free expansion and Joule-Thomson expansion. It was observed that the isentropic expansion is the only possible expansion process within a vortex tube. This was confirmed through comparison with experimental results obtained from different sources. The Expansion Process in a Counter

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Section: Discussionmentioning

confidence: 56%

The Expansion Process in a Counter-flow Vortex Tube

2015

J Vortex Sci Technol

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“…Researchers have obtained varying results for effect of nozzle numbers on energy separation. Some of these (Saidi & Valipour, 2003;Kirmaci, 2009;Dincer, Avci, Baskaya, & Berber, 2010;Avci, 2013) have observed the decay in performance with increase in nozzle number, the reason of decay is increase in turbulence of the flow. While few (Promvonge & Eiamsa-ard, 2005;Eiamsa-ard, 2010;Bovand, Rashidi, & Esfahani, 2016) have mentioned that increase in nozzle number enhances the energy separation.…”

Section: Effect Of Nozzle Number and Nozzle Geometry (Nn)mentioning

confidence: 99%

“…Similarly, common nozzle geometry is circular and square slot along with the other geometries as seen in Experimental work has been performed by these (Saidi & Valipour, 2003;Promvonge & Eiamsaard, 2005;Dincer, Tasdemir, Baskaya, & Uysal, 2008;Takahama & Soga, 1966;Kirmaci, 2009;Dincer, Avci, Baskaya, & Berber, 2010;Eiamsa-ard, Wongcharee, & Promvonge, 2010;Chang, Li, Zhou, & Qiang, 2011;Mohmmadi & Farhadi, 2013) with regard to nozzle number (Avci, 2013;Bovand, Rashidi, & Esfahani, 2016) and nozzle geometry. Researchers have obtained varying results for effect of nozzle numbers on energy separation.…”

Section: Effect Of Nozzle Number and Nozzle Geometry (Nn)mentioning

confidence: 99%

“…Experimental (Saidi & Allaf Yazdi, 1999;Kirmaci, 2009;Dincer, Avci, Baskaya, & Berber, 2010;Dincer, Yilmaz, Berber, & Baskaya, 2011) and numerical (Baghdad, Ouadha, & Addad, 2012;Mischner & Bespalov, 2002) exergy analysis is performed to present cooling and heating performance in terms of exergy. Exergy efficiency of the tube is the capacity to utilise the available energy.…”

Section: Exergy Studiesmentioning

confidence: 99%

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Parametric Review of Ranque-Hilsch Vortex Tube

Devade¹,

Pise²

2017

AJHMT

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Vortex tube is the device that separates pressurized fluid into hot and cold fluid streams simultaneously. The scientific community has done extensive experimental and theoretical studies since invention of vortex tube to augment the performance of the tube by varying geometrical and operational parameters; the paper deals with parametric review of all such work. The review takes into account effect of almost 14 parameters on performance of vortex tube. It includes developments in tube geometry like L/D ratio, number of nozzles; hot end valve angle and cold orifice diameter etc. are discussed along with different fluids and operational parameters like CMF and stagnation point etc. The focus of most of the theoretical and experimental studies was to investigate mechanism of thermal separation and geometry optimization. The main objective of this review is to discuss efforts made in order to enhance the refrigeration effect so that, missing links could help for future research.

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“…This study was performed using O 2 and air as pressurised inlet gas. Dincer et al (2010) carried out an experimental study about exergy analysis of the performance of a counter-flow RHVT with regard to nozzle cross-section area. Markal et al (2012) analysed a vortex tube thermodynamically.…”

Section: Figure 1 Schematic Drawing Of a Counter Flow Vortex Tubementioning

confidence: 99%

Entropy and exergy analysis of a Ranque-Hilsch vortex tube with two vortex chambers

Sepehrianazar

Khalilarya

2016

IJEX

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Abstract:In this paper, entropy and exergy of a vortex tube with two vortex chambers is studied. Computational fluid dynamics (CFD) analysis of a three-dimensional, steady state, compressible and turbulent flow is carried out through a vortex tube. The standard k-turbulence model is used to analyse highly rotating complex flow field. The entropy, inlet and outlet exergies, destruction of exergy and exergy efficiency are studied. Results show that for different inlet pressures, there is an optimum distance for placing second chamber to have maximum exergy efficiency. Placing second chamber at the axial interval of Z = 1.5-5 mm leads to have minimum cold temperature, maximum hot temperature and maximum exergy efficiency, in comparison with one chamber.

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Experimental investigation and exergy analysis of the performance of a counter flow Ranque–Hilsch vortex tube with regard to nozzle cross-section areas

Cited by 67 publications

References 26 publications

The Expansion Process in a Counter-flow Vortex Tube

The Expansion Process in a Counter-flow Vortex Tube

Parametric Review of Ranque-Hilsch Vortex Tube

Entropy and exergy analysis of a Ranque-Hilsch vortex tube with two vortex chambers

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