Energy Conversion and Management, ( ISI ), Volume (88), No (12), Year (2014-9) , Pages (129-138)

Title : ( Performance analysis of a minichannel-based solar collector using different nanofluids )

Authors: Omid Mahian , Ali Kianifar , ََAhmet Z. Sahin , Somchai Wongwises ,

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Abstract

In this paper, an analytical analysis has been performed to evaluate the performance of a minichannel-based solar collector using four different nanofluids including Cu/water, Al2O3/water, TiO2/water, and SiO2/water. The analysis of first and second laws is conducted for turbulent flow by considering the constant mass flow rate of nanofluid. The results are presented for volume fractions up to 4% and nanoparticle size of 25 nm where the inner diameter of the risers of flat plate collector is assumed to be 2 mm. Analysis of the first law of thermodynamics reveals that Al2O3/water nanofluids show the highest heat transfer coefficient in the tubes while the lowest value belongs to SiO2/water nanofluids. The highest outlet temperature is provided by Cu/water nanofluids, and after that TiO2/water, Al2O3/water, and SiO2/water nanofluids are in ranks of second to fourth. The results of second law analysis elucidate that Cu/water nanofluid produces the lowest entropy generation among the nanofluids. It is found that although the effective thermal conductivity of TiO2/water nanofluids is less than Al2O3/water nanofluids, but the entropy generation of TiO2/water is lower than Al2O3/water. Finally, some recommendations are given for future studies on the applications of nanofluids in solar collectors.

Keywords

Minichannel solar collector; Entropy generation; Nanofluids; Efficiency
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@article{paperid:1042966,
author = {Mahian, Omid and Kianifar, Ali and ََAhmet Z. Sahin and Somchai Wongwises},
title = {Performance analysis of a minichannel-based solar collector using different nanofluids},
journal = {Energy Conversion and Management},
year = {2014},
volume = {88},
number = {12},
month = {September},
issn = {0196-8904},
pages = {129--138},
numpages = {9},
keywords = {Minichannel solar collector; Entropy generation; Nanofluids; Efficiency},
}

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%0 Journal Article
%T Performance analysis of a minichannel-based solar collector using different nanofluids
%A Mahian, Omid
%A Kianifar, Ali
%A ََAhmet Z. Sahin
%A Somchai Wongwises
%J Energy Conversion and Management
%@ 0196-8904
%D 2014

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