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IIR document

Improvement of thermosyphon performance by employing nanofluid.

Number: pap. n. TP-014

Author(s) : BUSCHMANN M. H., FRANZKE U.

Summary

The presented study aims to make nanofluids applicable for thermosyphons. Experiments employing a vertical thermosyphon are carried out utilising deionised water and H2O / TiO2-nanofluids with different concentrations as working fluids. A maximal reduction of the thermal resistance of about 24 % can be achieved when nanofluids are employed. However, an optimum is reached at nanoparticle concentrations between 0.2 vol. % and 0.3 vol. %. At higher concentrations the thermal resistance remains either unchanged or increases again. Long term experiments carried out with 0.3 vol. % indicate a massive aging of the porous layer built of nanoparticles on the evaporator surface.

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Pages: 133-140

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Details

  • Original title: Improvement of thermosyphon performance by employing nanofluid.
  • Record ID : 30008093
  • Languages: English
  • Source: 4th IIR Conference on Thermophysical Properties and Transfer Processes of Refrigerants
  • Publication date: 2013/06/17

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