EXPERIMENTAL STUDY OF HEAT TRANSFER IN A HEAT EXCHANGER WITH RECTANGULAR MINI CHANNELS

DOI: 10.1615/ICHMT.2009.CONV.140
9 pages

Mahmoud Hammami
LETTM, Faculty of Sciences of Tunis, 2092 El Manar 2, Tunisia

Akrem Ben Said
LETTM, Faculty of Sciences of Tunis, 2092 El Manar 2, Tunisia

Rejeb Ben Maad
University Tunis El Manar, Faculty of Sciences of Tunis, Department of Physics, Laboratory of Energizing and Thermal and Mass Transfers, 2092 El Manar II, Tunis, Tunisia

Mourad Rebay
University of Reims Champagne-Ardenne GRESPI / Faculte des Sciences PB 1039, 51687 Reims, France

Résumé

This paper presents the results of an experimental study related to characterisation of a mini channel heat exchanger. Such heat exchanger may be used in water cooling of electronic components. The results obtained show the efficiency of this exchanger even with very low water flow rates. Indeed, in spite of the importance of the extracted heat fluxes which can reach about 50 Kw/m², the temperature of the cooled Aluminium bloc remained always lower than the tolerated threshold of 80°C in electronic cooling. Moreover, several thermal characteristics such as equivalent thermal resistance of the exchanger, the average internal convective heat transfer coefficient and the increase in the temperature of the cooling water have been measured. The results presented have been obtained with in "quinconce" rectangular mini-channel heat exchanger, with a hydraulic diameter D_h = 2 mm.