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Simplified correlation equations of heat transfer coefficient during phase change flow inside tubes filled with porous media.

Number: pap. n. 11.2

Author(s) : HAMMAD M., TARAWNEH M., ALSHQIRATE A.

Summary

In this work an easy to use, simple and direct equations for heat transfer coefficients of phase change fluid flow were were formulated and tested. The considered fluid flow encountered convection heat flux inside rigid tubes filled with porous media. During the flow, evaporation and condensation processes were assumed. An analytical method using exponential non dimensional analysis was used. The Buckingham p theorem and method of indices was used to obtain simplified formulae for the convection heat transfer coefficient. As a case study, carbon dioxide was used. Resulted values were compared to the experimental values for validation purposes. Results also were compared to published values and found in the same range of values. The formulae obtained can be used to calculate the mean heat transfer coefficients and heat flux.. Enhancement in heat transfer by increasing heat flux was due to the existence of the porous media inside the tube. Using these correlations may enhance heat exchanger design as well especially condensers and evaporators. Better energy use and higher effectiveness factors may result following this method.

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Pages: 15 p.

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Details

  • Original title: Simplified correlation equations of heat transfer coefficient during phase change flow inside tubes filled with porous media.
  • Record ID : 30006160
  • Languages: English
  • Source: 4th Jordanian IIR International Conference on Refrigeration and Air Conditioning. Proceedings: Amman, Jordan, September 10-12, 2012.
  • Publication date: 2012/09/10

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