Journal
JOURNAL OF BUILDING ENGINEERING
Volume 58, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jobe.2022.104981
Keywords
olar; Building; PCM; Nanofluid; PVT
Funding
- Deanship of Scientific Research at King Khalid University [R.G.P.2/55/43]
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This study simulated a solar thermal panel system using the finite element method in COMSOL Multiphysics, finding that the system with centrally-holed fins could effectively utilize phase change material for energy supply.
The present study simulates a solar thermal panel using the finite element method (FEM) in COMSOL Multiphysics. A cropper pipe of a water-Al2O3 nanofluid flow was used under a solar panel. A number of elliptic fins were attached to the pipe. The fins were holed and configured in three models. The system of the pipe and fins was placed in a chamber filled with CaCl2.6H2O as a phase change material (PCM) under the panel. The proposed solar system was used on a pitched roof to partially supply the energy demand of the Boarding clinic. The energy calculations were carried out in Design Builder. It was found that PCM began to melt at t=40 min. The fins with a central hole led to 10.4% higher melted PCM than double-hole fins at t=100 min. The centrally-holed fins minimized the output flow temperature. However, they also minimized the PVT temperature. It was also found that the proposed system could supply 9.11% of the heating demand of the building in the coldest month of the year. In hot months, however, up to 33.3% of the energy required to heat water could be supplied by the PVT + PCM system.
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