Investigation of Thermal Performance of a Large Aperture Parabolic Trough Solar Collector
In this study, effort has been made to investigate the thermal
performance of a large aperture parabolic trough solar
concentrator (PTSC). A PTSC of 9 m aperture with 110 mm
absorber tube is considered for the analysis on the basis of
manufacturing standards and availability of the receiver tube.
The numerical analysis of the receiver of PTSC performed
using ANSYS Fluent 19.0. The flux profile used for the
analysis is obtained using in house developed model by
considering limb darkening effect of the solar disk. The effect
of variation of the aperture, mass flow rate, and various HTFs
(liquid sodium, NaK78, molten salt and therminol VP1) is
studied on the thermal performance of PTSC. The thermal
gradient increases with increase of the aperture size which can
be reduced using better HTF or designing PTSC appropriately.
Out of all HTF used for the analysis liquid sodium provides
the least thermal gradient.