Open AccessNumerical simulation of the temperature distribution of elliptical cavity tube receivers in the parabolic trough solar collector
Author(s) -
Fei Cao,
Xianzhe Gu,
Jia-Ling Qiu,
Chun-Yuan Yang,
Tianyu Zhu
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/844/1/012001
Subject(s) - parabolic trough , tube (container) , thermal , mechanics , materials science , optics , trough (economics) , heat flux , heat transfer , physics , thermodynamics , composite material , macroeconomics , economics
The elliptic cavity tube absorber is used in the parabolic trough solar collectors to increase the optical efficiency and decrease the thermal loss. But the non-uniform heat flux distribution on the tube receiver will cause non-uniform temperature distribution, thus leading to asymmetric thermal stress and deformation of the tube receiver. In this paper, the geometric as well as thermal parameters of the elliptical cavity tube receiver are analysed through numerical simulation. The temperature distribution of the tube receiver in the single-phase liquid zone, viz. the water zone and the vapour zone, is analysed. It is found from this study that there are two extreme temperature areas in the elliptical cavity tube receiver. When the major semi-axis of the elliptical cavity is 63mm, the maximum temperature of the water zone is the largest, which occurs at (-35mm, 0mm) of the tube receiver. When the major semi-axis of the elliptical cavity is 67mm, the maximum temperature appears at (-9mm, 0mm) in the vapour zone, and the minimum temperature rise appears at (-13.88mm, 0mm).