Share

IIR document

Heat transfer and fluid flow behavior of an economical microencapsulated phase change material slurry in turbulent flow.

Number: pap. O46

Author(s) : ALVARADO J. L., TAHERIAN H., LANGURI E. M., et al.

Summary

A microencapsulated phase change material (MPCM) slurry has been formulated as a high heat capacity heat transfer fluid (HTF) for turbulent flow conditions. The MPCM slurry consists of du-rable 5-µm microcapsules. The phase change material inside the microcapsules consists of methyl stearate. Heat transfer and fluid flow properties of the aqueous MPCM slurry in turbulent flow (3000 < Re < 6000) were determined experimentally. Heat transfer data were obtained under constant heat flux conditions using a closed heat transfer loop. The experimental system was used to determine effective heat transfer coefficient and pressure drop with and without phase change occurring inside the microcapsules. Dynamic viscosity data suggest that at relatively low mass concentrations the slurry behaves as a Newtonian fluid. The pressure drop data under turbulent flow conditions were also measured at MPCM concentrations of 7 and 11% by weight. It was found that whenever the MPCM experienced a phase change, the heat transfer coefficient of the MPCM slurry was very close to that of water. Moreover, the pressure drop of the MPCM slurry was comparable to that of water despite of the higher viscosity the slurry. A non-dimensional Nusselt number correlation is being proposed for MPCM slurries.

Available documents

Format PDF

Pages: 8 p.

Available

  • Public price

    20 €

  • Member price*

    Free

* Best rate depending on membership category (see the detailed benefits of individual and corporate memberships).

Details

  • Original title: Heat transfer and fluid flow behavior of an economical microencapsulated phase change material slurry in turbulent flow.
  • Record ID : 30005049
  • Languages: English
  • Source: 10th International Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Kobe, Japan, July 29-August 1, 2012.
  • Publication date: 2012/07/01

Links


See other articles from the proceedings (46)
See the conference proceedings

Indexing