Performance characteristics of energy separation in a steam-operated vortex tube

Takahama, Heishiciro; Kawamura, Hitoshi; Kato, Seizo; Yokosawa, Hajime

doi:10.1016/0020-7225(79)90048-x

Cited by 27 publications

(13 citation statements)

References 4 publications

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“…Following present work (1 inlet nozzle), and a cubic fitting yields, (7) Following present work (2 inlet nozzles), and a cubic fitting yields, (8) Following present work (4 inlet nozzles), and a cubic fitting yields, (9) The above correlations can be used to help design a vortex tube system to obtain the highest temperature separation in the vortex tube with insulation.…”

Section: Empirical Correlationmentioning

confidence: 87%

“…A critical inlet Reynolds number was identified at which the separation was a maximum. Takahama et al 8 investigated experimentally the energy separation performance of a steam-operated standard vortex tube and reported that the performance worsened with wetness of steam at the nozzle outlet because of the effect of evaporation. Takahama and Yokosawa 9 examined the possibility of shortening the chamber length of a standard vortex tube by using divergent tubes for the vortex chamber.…”

Section: Introductionmentioning

confidence: 99%

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Promvonge¹,

Eiamsa-ard²

2005

ScienceAsia

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This paper describes the experimental study of the temperature separation phenomenon in a counter-flow type vortex tube. Effects of (1) the number of inlet tangential nozzles, (2) the cold orifice diameter, and (3) tube insulations on the temperature reduction and isentropic efficiency of the tube were experimentally investigated. The temperature drops of the cold air obtained from these tests were in good agreement with available data for comparison at a similar scale of operating conditions. The experimental results showed that the insulated vortex tube with 4 inlet nozzles and cold orifice diameter of 0.5D yielded the highest temperature reduction (temperature separation) and isentropic efficiency at about 30 o C and 33% respectively.

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Section: Empirical Correlationmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

Untitled

Promvonge¹,

Eiamsa-ard²

2005

ScienceAsia

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“…Studies with different fluids are required to study the effect on energy separation at low pressures. The steam or two-phase mixtures (Collins & Lovelace, 1979;Takahama, Kato, & Yokosawa, 1979) at dryness fraction <0.8 do not show any energy separation, this conclusion needs to be analysed for reasons of non-separation.…”

Section: Effect Of Working Fluidsmentioning

confidence: 98%

“…The more commonly used fluid for the experimental and numerical investigations is air. In addition, various other fluids like water (Balmer, 1998), monoatomic (Linderstr0m-Lang, 1965Gulyaev, 1966), diatomic (Baker, 1956;Aydin & Baki, 2006;Kirmaci, 2009;Agarwal, Naik, & Gawale, 2014), tri-atomic gases, twophase fluids (Collins & Lovelace, 1979;Takahama, Kato, & Yokosawa, 1979), mixtures of gases, steam and organic and inorganic refrigerants (Han, et al, 2013) have been used. Numerical studies (Farouk, Farouk, & Gutsol, 2009;Pinar, Uluer, & Kırmaci, 2009;Polat & Kirmaci, 2011;Khazaei, Teymourtash, & Jafarian, 2012;Baghdad, Ouadha, & Addad, 2012;Thakare & Parekh, 2014) are also available with different fluids mentioned above in the literature.…”

Section: Effect Of Working Fluidsmentioning

confidence: 99%

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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“…There have been a lot of researchers since then who have studied the Vortex Tube aiming to enhance its performance. Takahama et al's (1979) study resulted in several formulas for determining the performance and efficiency of VT under a variety of operating conditions, which induced the optimum ratios of VT dimensions corresponding to the highest efficiency. Silverman (1982) questioned whether the VT is a violation of the second law of thermodynamics or not.…”

Section: Introductionmentioning

confidence: 99%

Recovering Energy at Entry of Natural Gas into Customer Premises by Employing a Counter-Flow Vortex Tube

Farzaneh–Gord

Kargaran

2010

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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Résumé -Récupération d'énergie à l'arrivée du gaz naturel dans les installations des usagers grâce à l'emploi d'un tube Vortex à contre-courant -La réduction de la pression de gaz naturel entre les conduites de distribution haute pression et les installations des usagers est aujourd'hui assurée par des vannes de réduction de pression. Ce dispositif entraîne une perte importante du contenu énergétique du gaz. Les installations des usagers consommant trop peu de gaz naturel pour envisager d'avoir recours à des dispositifs d'expansion, notre étude explore les avantages potentiels de l'utilisation d'un tube Vortex pour la réduction de la pression de gaz naturel. Il s'agit de remplacer la vanne de réduction de pression par un tube Vortex dans le dispositif de réduction de la pression de gaz naturel et de tirer profit de la capacité de refroidissement produite. L'étude expérimentale avait pour objectif de déterminer l'effet du diamètre de l'orifice froid ainsi que de l'utilisation de l'air et du gaz naturel comme fluides sur la production d'énergie dans le tube Vortex à contre-courant. Le taux de récupération de l'énergie est déterminé à partir des mesures expérimentales. Abstract -Recovering Energy at Entry of Natural Gas into Customer Premises by Employing a Counter-Flow Vortex Tube -Throttling valves are currently utilised to reduce high-pressure natural gas flowing through the distribution pipeline to the working level of customers' equipment. This wastes valuable energy of the gas. Due to low natural gas consumption at customer premises, it is not feasible to utilise expansion machines. In this study, a new idea is proposed to take advantage of the Vortex Tube and natural gas pressure reduction. The idea is to replace the throttling valve with a VortexTube in the natural gas pressure reduction system and take advantage of the generated cooling capacity. An experimental investigation was made to determine the effects of the cold orifice diameter and the energy separation of the counter-flow Vortex Tube when air and natural gas are used as the fluid. The energy separation was investigated by use of the experimentally obtained data.

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Performance characteristics of energy separation in a steam-operated vortex tube

Cited by 27 publications

References 4 publications

Untitled

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Parametric Review of Ranque-Hilsch Vortex Tube

Recovering Energy at Entry of Natural Gas into Customer Premises by Employing a Counter-Flow Vortex Tube

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