Experimental Study on Heat Transfer and Flow Characteristics of Air Cooling through Cross-flow Microchannel Heat Exchanger
Date of Award
Mechanical, Automotive, and Materials Engineering
Fartaj, Amir (Mechanical, Automotive, and Materials Engineering)
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Air-side heat transfer and flow characteristics were studied through an air-to-deionized water cross-flow serpentine microchannel heat exchanger during air cooling. In the single phase, twenty distinct operating conditions were maintained within the range of air and deionized water-side Reynolds number 283 í▄ Rea í▄ 1384 and 105 í▄ Rew í▄ 159 respectively, retaining the constant inlet temperatures of both fluids (Ta,i = 38 í└0.5íπC and Tw,i = 9 í└0.5íπC). Heat transfer and fluid flow key parameters were evaluated from experimental data. Heat balance performance was observed within 4% throughout the experiment, and major thermal resistance was found in the air-side, ranging from 89% - 94% of overall thermal resistance. The effects of Rew and Rea on air-side Nusselt number (Nua), Colburn factor (ja), friction factor (fa), and other parameters were examined, and general correlations were achieved. The Nua-Rea-Pra relationship of the current study is compared to other correlations, and several recommendations are proposed.
Dasgupta, Engr Sarbadaman, "Experimental Study on Heat Transfer and Flow Characteristics of Air Cooling through Cross-flow Microchannel Heat Exchanger" (2011). Electronic Theses and Dissertations. 181.