In this paper, thermal-fluid modeling of nonporous/porous thermal coil filled by alumina nanofluid is discussed considering constant/variable solar heat fluxes. The fluxes are calculated for a parabolic concentrator at the solar paths for the city with a longitude of 59.20 deg and latitude of 32.87 deg in the clear sky at spring season. The governing equations are included as continuity, momentum, and energy conservations with considering variable solar flux by shadow effects of the coil on the parabolic concentrator. The numerical model is based on the finite element method by LU algorithm using the mumps solver. The results show that, in a porous medium, that the normalized temperature of the presented model has an acceptable agreement with experimental data with maximum errors of 3%. The existence of porosity significantly increases heat transfer parameters that improve transferred solar heat from the wall of the coil to nanofluid. The variable solar heat flux increases the temperature in the length of the coil rather than constant heat fluxes because of increasing exchanged heat to nanofluid.
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February 2020
Research-Article
The Modeling of Constant/Variable Solar Heat Flux Into a Porous Coil With Concentrator
Sayyed Aboozar Fanaee,
Sayyed Aboozar Fanaee
1
Department of Engineering,
Birjand 97175615,
e-mail: Sab.famech@birjand.ac.ir
University of Birjand
,Birjand 97175615,
Iran
e-mail: Sab.famech@birjand.ac.ir
1Corresponding author.
Search for other works by this author on:
Mojtaba Rezapour
Mojtaba Rezapour
Department of Engineering,
Birjand 9188715647,
e-mail: m.rezapour6624@birjand.ac.ir
University of Birjand
,Birjand 9188715647,
Iran
e-mail: m.rezapour6624@birjand.ac.ir
Search for other works by this author on:
Sayyed Aboozar Fanaee
Department of Engineering,
Birjand 97175615,
e-mail: Sab.famech@birjand.ac.ir
University of Birjand
,Birjand 97175615,
Iran
e-mail: Sab.famech@birjand.ac.ir
Mojtaba Rezapour
Department of Engineering,
Birjand 9188715647,
e-mail: m.rezapour6624@birjand.ac.ir
University of Birjand
,Birjand 9188715647,
Iran
e-mail: m.rezapour6624@birjand.ac.ir
1Corresponding author.
Contributed by the Solar Energy Division of ASME for publication in the Journal of Solar Energy Engineering: Including Wind Energy and Building Energy Conservation. Manuscript received December 27, 2018; final manuscript received June 18, 2019; published online July 23, 2019. Assoc. Editor: Dr. Gerardo Diaz.
J. Sol. Energy Eng. Feb 2020, 142(1): 011004 (9 pages)
Published Online: July 23, 2019
Article history
Received:
December 27, 2018
Revision Received:
June 18, 2019
Accepted:
June 20, 2019
Citation
Fanaee, S. A., and Rezapour, M. (July 23, 2019). "The Modeling of Constant/Variable Solar Heat Flux Into a Porous Coil With Concentrator." ASME. J. Sol. Energy Eng. February 2020; 142(1): 011004. https://doi.org/10.1115/1.4044126
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