EXPERIMENTAL INVESTIGATION OF THE EFFECT OF NUMBER OF LAYERS AND FLOW ARRANGEMENT ON THE PERFORMANCE OF A MICROCHANNEL HEAT SINK SYSTEM | ||||
| The International Conference on Applied Mechanics and Mechanical Engineering | ||||
| Article 51, Volume 18, 18th International Conference on Applied Mechanics and Mechanical Engineering., April 2018, Page 1-13 PDF (1.42 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/amme.2018.34994 | ||||
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| Authors | ||||
| H. Abdel Aty1, 2; O. Hassan3; M. Abdelgawad3; N. Y. Abdel-Shafi3 | ||||
| 1Mechanical Engineering Department, Assiut University, Assiut 71516, Egypt.+ | ||||
| 2Corresponding Author. | ||||
| 3Mechanical Engineering Department, Assiut University, Assiut 71516, Egypt. | ||||
| Abstract | ||||
| ABSTRACT This paper presents experimental investigation of the effect of number of layers as well as the flow arrangement on the performance of a microchannel heat sink system (MCHS). The effect of flow rate on pressure drop, temperature uniformity, and outlet temperature in single and double layers MCHS under the effect of uniform heat flux condition was investigated. The MCHS used had micro channels with rectangular cross section. The heat flux applied during the experiments was varied from 5.0 to 13.68 W/cm2. The results of single layer MCHS were compared with theoretical predictions in order to validate the results of the present test rig. From the obtained results it was observable that the outlet temperature was highly dependent on the mass flow rate until a certain value after which change in the outlet temperature was minor. On the other hand, the pressure drop increased almost linearly with the increase in mass flow rate due to laminar nature of the flow. When multilayer systems were tested, the main observation was a significant reduction in the pressure drop compared to the single layer case for the same mass flow rate. Moreover, flow arrangement was found to have an impact on pressure drop which was smaller in the case of counter flow arrangement compared to parallel flow arrangement case. Flow configuration (parallel, counter, or cross-flow) had a significant effect on temperature uniformity over the heat sink area with counter-flow arrangement giving best temperature uniformity followed by the cross-flow arrangement. Change in the outlet temperature in the case of multilayer and single layer systems was not significate which may be due to the fact that the same mass flow rate was applied to all tested cases. | ||||
| Keywords | ||||
| Micro channel heat sink; multi-layer; flow arrangement; Experimental Investigation | ||||
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