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A comparative study of the effect of initial turbulence on the performance of an open vertical refrigerated multi-deck: a numerical study and its experimental validation.

Author(s) : CHEN Y. F., LIN H. W., HSIEH W. D., et al.

Summary

This study experimentally and numerically examines the 3D effect on the performance of an open refrigerated display cases (ORDC). Three dimensional simulation model with k-E turbulence model incorporating the buoyancy effect is carried out to compare with the results by 2D simulation model. It is found that the infiltration rate of 3D simulation is significantly larger than that of 2D simulation, indicating the importance of 3D flow field, and it should not be neglected in CFD analysis of an ORDC. The simulation also suggests that turbulence intensity cast a considerable influence on the performance of ORDC. When the turbulence intensity is reduced from 25 to 5%, the temperature difference between the first and the sixth shelf can be reduced from 11 to 5°C and the infiltration rate can be reduced by 25%. The 3D computations in terms of temperature distribution inside the shelves were compared with the measurements, and good agreement are reported.

Details

  • Original title: A comparative study of the effect of initial turbulence on the performance of an open vertical refrigerated multi-deck: a numerical study and its experimental validation.
  • Record ID : 2010-0130
  • Languages: English
  • Source: 2009 ASHRAE Annual Conference CD. Transactions papers presented at the 2009 ASHRAE Annual Conference: Louisville, KY, June 2009. Volume 115, part 2.
  • Publication date: 2009/06/21

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