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Experimental Study about Heating and Cooling Performance of Parallel Connected Ranque-Hilsch Vortex Tubes: Nozzle number and material effect and exergy analysis

[+] Author and Article Information
Hüseyin Kaya

Bartın University, 1Bartin University, Faculty of Engineering, Mechanical Engineering, 74100, Bartin, Turkey
hkaya@personel.bartin.edu.tr

Fahrettin Günver

Bartın University, 2Bartin University, Graduate School of Natural and Applied Sciences, Mechanical Engineering, 74100, Bartin, Turkey
fgunver42@gmail.com

Onuralp Uluer

Gazi University, 3Gazi University, Faculty of Technology, Manufacturing Engineering, 06503 Ankara, Turkey
uluer@gazi.edu.tr

Volkan Kirmaci

Bartın University, 1Bartin University, Faculty of Engineering, Mechanical Engineering, 74100, Bartin, Turkey
volkankirmaci@gmail.com

1Corresponding author.

ASME doi:10.1115/1.4040707 History: Received March 07, 2018; Revised June 21, 2018

Abstract

An experimental analysis for parallel connected two identical counter flow Ranque-Hilsch vortex tubes with different nozzle materials and numbers was conducted by using compressed air as a working fluid in this paper. Heating and cooling performance of vortex tube system (circuit) and the results of exergy analysis are researched comprehensively according to different inlet pressure, nozzle numbers and materials. Nozzles made of polyamide plastic, aluminum and brass were mounted into the vortex tubes individually for each case of experimental investigation with the numbers of nozzles 2,3,4,5 and 6. The range of operated inlet pressure 150 kPa - 550 kPa with 50 kPa variation. The ratio of length - diameter (L/D) of each vortex tube in the circuit is 14 and the cold mass fraction is 0.36. Coefficient of performance (COP) values, heating and cooling capacity of the parallel connected RHVT system were evaluated. Further an exergy analysis was carried out to evaluate the energy losses and second law efficiency of the vortex tube circuit. The greatest thermal performance was obtained with aluminum-six-nozzle when taking into account all parameters such as temperature difference, COP values, heating and cooling capacity and exergy analysis.

Copyright (c) 2018 by ASME
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