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IIR document

Working gases characteristics' influence on energy separation of the vortex tube.

Number: pap. n. 223

Author(s) : WU K., WANG Z., HAN X., et al.

Summary

The vortex tube is an effective energy separation device, which is structurally simple and has no moving parts. At present, the research of working gases' influence ,especially for HFCs, on energy separation of vortex tube is few. Based on this, a vortex tube performance device is designed. In the experiment, R728, R744, R32, R22, R161, R134a are selected as working fluids. The inlet pressure of the vortex tube is changed from 0.2MPa to 0.8 MPa(abs), and the inlet temperature of the vortex tube is controlled about 12°C. The performance of the vortex tube for cooling, heating and energy separation with different working fluids is tested. When R728 and R744 is chose as working gas, it is found that the value of temperature separation and outlet pressure increase with the rise of inlet pressure, but there is an extreme value for R744 when inlet pressure is about 1.1 MPa. Through comparing experimental data of different working gases, three fluid characteristics: thermal diffusivity, kinematic viscosity, thermal conductivity are considered as the main influence factors of energy separation in the vortex tube. The isenthalpic throttling effect of working fluid itself will also affect the cooling effect of vortex tube. In addition, the wall temperature of vortex tube hot-side is measured, the phenomenon of the cold end in vortex tube is observed, conditions for the liquefying phenomenon using HFCs are discussed and roughly given.

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Pages: 8 p.

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Details

  • Original title: Working gases characteristics' influence on energy separation of the vortex tube.
  • Record ID : 30004534
  • Languages: English
  • Subject: HFCs alternatives
  • Source: 10th IIR-Gustav Lorentzen Conference on Natural Working Fluids (GL2012). Proceedings. Delft, The Netherlands, June 25-27, 2012.
  • Publication date: 2012/06/25

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