Heat transfer analysis of different thermal oils in parabolic trough solar collectors with longitudinal sinusoidal internal fin

Year 2019, Volume: 23 Issue: 5, 848 - 858, 01.10.2019

Burak Kurşun

https://doi.org/10.16984/saufenbilder.493707

Abstract

Parabolic
trough solar collectors (PTSC) plays an important role in the heating of
fluids and in the generation of electricity . In
this study, heat transfer and temperature distribution analysis was carried out
for the use of internal longitudinal fins with different geometries in a
parabolic trough solar collector.
 Numerical analyzes were carried out for
different Reynolds (Re) numbers (2x10⁴-8 x10⁴) at
steady-state conditions and three different thermal oils were used as heat
transfer fluid (HTF). The use of the internal fin with sinusoidal lateral
surface for all types of thermal oil increased the heat transfer and made the
temperature distribution in the fluid more uniform. The
highest thermal enhancement factor was occurred for Syltherm 800 oil and
sinusoidal fin geometry. With the use of Syltherm 800 oil, the thermal
enhancement factor () increased by 40% and 44% respectively
according to the Therminol VP1 and D12 oil type for the case with sinusoidal
fin.

Keywords

Longitudinal fin, Parabolic trough, Sinusoidal fin, Thermal oil

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