<- Back to II. Mechanical Engineering & Physics Vol. 18

Read full-text

Cite the paper

THE COMPARISONS ON DISTRIBUTION BETWEEN PERPENDICULAR FLOW AND PARALLEL FLOW OF MICROCHANNEL EVAPORATORS BY THE SEPARATED MANIFOLDS Journal Article Mechanics, Materials Science & Engineering, 18 (1), 2018, ISSN: 2412-5954. |

**Authors: Congkhanh Le, Thanhtrung Dang, Batan Le, Kiencuong Giang**

**ABSTRACT. **In this paper, comparisons on distribution between perpendicular flow and parallel flow to the microchannels in separated manifolds of microchannel evaporators were investigated by the numerical simulation and the experiment. For the comparisons, two kinds of separated manifolds were designed: the perpendicular flow separated manifold and the parallel flow one. The manifolds were made of plastic and the microchannel heat sinks were made of Aluminum. The length of each microchannel is 120 mm, the depth is 0.5 mm, and the width is 0.3 mm. In this study, the results were obtained with the inlet temperature *T _{in}* = 40

^{o}C, heat power

*P*= 130 W, mass flow rate

_{source}*min*= 0.3 g/s, ambient temperature

*T*= 30°C. The results showed that the parallel flow separated manifold always has better than the perpendicular flow one. In addition, it was showed that the nucleation site and full evaporation in the parallel flow case happen sooner than the perpendicular one in both simulations and experiments which giving the better heat transfer efficiency.

_{amb}**Keywords: **perpendicular flow, parallel flow, microchannel, heat sink, manifold, evaporation

**References**

[1] Cheng-Hung Huang, Chun-Hsien Wanga, Sin Kim, A manifold design problem for a plate-fin microdevice to maximize the flow uniformity of system, International Journal of Heat and Mass Transfer, 95 (2016), pp. 22 – 34. DOI 10.1016/j.ijheatmasstransfer.2015.11.072

[2] C. Amador, A. Gavriilidis , P. Angeli , Flow distribution in different microreactor scale-out geometries and the effect of manufacturing tolerances and channel blockage, Chemical Engineering Journal, 101 (2004), pp. 379–90. DOI 10.1016/j.cej.2003.11.031

[3] H. Liu, P. Li, J. Van Lew, CFD study on flow distribution uniformity in fuel distributors having multiple structural bifurcations of flow channels, International Journal Hydrogen Energy, 35 (2010), pp. 9186–98. DOI 10.1016/j.ijhydene.2010.06.043

[4] D. Tondeur, L. Luo, Design and scaling laws of ramified fluid distributors by the constructal approach, Chemical Engineering Science, 59 (2004), pp. 1799–813. DOI 10.1016/j.ces.2004.01.034

[5] L. Luo, D. Tondeur, Optimal distribution of viscous dissipation in a multi-scale branched fluid distributor, International Journal of Thermal Sciences, (44) 2005, pp. 1131–41, DOI 10.1016/j.ijthermalsci.2005.08.012

[6] L. Luo, Z. Fan, H. Le Gall, X. Zhou, W. Yuan, Experimental study of constructal distributor for flow equidistribution in a mini crossflow heat exchanger (MCHE), Chemical Engineering and Processing: Process Intensification, (47) 2008, pp. 229–36, DOI 10.1016/j.cep.2007.02.028

[7] O-Charoen S, Srivannavit O, Gulari E, Simulation and visualization of flow pattern in microarrays for liquid phase oligonucleotide and peptide synthesis, PMC Journals, (23) 2008, pp. 755–761. DOI 10.1021/bp060363o

[8] Y. Chen, P. Cheng, Heat transfer and pressure drop in fractal tree-like microchannel nets, International Journal Heat and Mass Transfer, (45) 2002, pp. 2643–2648. DOI 10.1016/S0017-9310(02)00013-3

[9] Kandlikar SG, Garimella S, Li DQ, Colin S, King MR, Heat transfer and fluid flow in minichannels and microchannels, Elsevier Pte Ltd., 2006. DOI 10.1016/B978-0-08-044527-4.X5000-2.

Mechanics, Materials Science & Engineering Journal by Magnolithe GmbH is licensed under a Creative Commons Attribution 4.0 International License.

Based on a work at www.mmse.xyz.