Experimental comparison of micro-scaled plate-fins and pin-fins under natural convection
International Communications in Heat and Mass Transfer
© 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
The present work analyses, for the first time, the heat transfer from pin micro-fins. The scope of the present paper is comparing thermal performance of plate micro-fin and pin micro-fin arrays under natural convection conditions in air. Two fin geometries are considered: plate and pin fin arrays with the same thermal exchanging surface are tested. The investigation shows that the pin micro-fins can improve the thermal performance compared to plate micro-fin arrays. Indeed, pin micro-fins are found to have higher heat transfer coefficients and lower thermal resistances, as well as a better material usage. This makes pin micro-fins able to achieve both thermal enhancement and weight reduction. The radiative heat transfer is calculated: a new model to determine the radiative view factors of pin fins is proposed and is used in the analysis. The effect of the orientation is considered as well.
The financial support provided by the EPSRC-DST through the BioCPV project (Ref No: EP/J000345/1) is duly acknowledged
This is the final version of the article. Available from the publisher via the DOI in this record.
Vol. 75, pp.59–66