The Effect of Regulating Elements on Convective Heat Transfer along Shaped Heat Exchange Surfaces

• Authors: Jozef Cernecky , Jan Koniar , Zuzana Brodnianska
• Languages of publication: EN

Abstracts

EN

The paper deals with a study of the effect of regulating elements on local values of heat transfer coefficients along shaped heat exchange surfaces with forced air convection. The use of combined methods of heat transfer intensification, i.e. a combination of regulating elements with appropriately shaped heat exchange areas seems to be highly effective. The study focused on the analysis of local values of heat transfer coefficients in indicated cuts, in distances expressed as a ratio x/s for 0; 0.33; 0.66 and 1. As can be seen from our findings, in given conditions the regulating elements can increase the values of local heat transfer coefficients along shaped heat exchange surfaces. An optical method of holographic interferometry was used for the experimental research into temperature fields in the vicinity of heat exchange surfaces. The obtained values correspond very well with those of local heat transfer coefficients αx, recorded in a CFD simulation.

Keywords

EN

heat transfer; convection; holographic interferometry

• Publisher: De Gruyter Open
• Journal: Chemical and Process Engineering
• Year: 2013
• Volume: 34
• Issue: 1
• Pages: 5-16

Dates

published

1 - 03 - 2013

online

02 - 04 - 2013

Contributors

author

Jozef Cernecky

• Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental Technology, Studentska 26, 960 53 Zvolen, Slovakia

author

Jan Koniar

• Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental Technology, Studentska 26, 960 53 Zvolen, Slovakia

author

Zuzana Brodnianska

• Technical University in Zvolen, Faculty of Environmental and Manufacturing Technology, Department of Environmental Technology, Studentska 26, 960 53 Zvolen, Slovakia

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Identifiers

DOI

10.2478/cpe-2013-0002