New experimental investigation of the circumferential temperature uniformity for a PTC absorber

Mohammed Halimi, Aumeur El Amrani and Choukri Messaoudi

Energy, 2021, vol. 234, issue C

Abstract: In this work, an experimental investigation of non-uniform circumferential temperature distribution (CTD) of a PTC absorber is done. Indeed, to evaluate the absorber CTD, a new method is reported by using real IR thermography profiles. The effects of focal length, absorber diameter, and outer glass cover (OGC) on the CTD are investigated. Moreover, a data visualization and statistical analysis are carried out. The most uniform and profitable flux distribution is found for a diameter of 0.042 m and a focal distance of 0.19 m. For this configuration, the highest ηO obtained in the cases with and without OGC is of about 57.16% and 60.87%, respectively. We notice that the temperature gradients and peaks increase gradually with the distance; a maximum temperature gap (ΔTmax) of 72 °C is reached for the distance of 0.26 m. In the case of OGC, the ΔTmax is only of about 63.6 °C (i.e., a difference of 8.4 °C). Thus, in the case of non-OGC, the highest mean and median temperatures of about 73.15 °C and 70.20 °C, respectively, are reported for a distance of 0.19 m. However, for the OGC case, the highest temperature values of about 80.8 °C and 76.8 °C, respectively, are reported for a distance of 0.22 m. In addition, the highest CTD uniformity is reported for a distance of 0.19 m, where an increase in the uniformity of about 2% is observed for the OGC use.

Keywords: Parabolic trough collectors; IR thermography; Flux distribution; Temperature distribution; Outer glass cover; Statistical analysis; Uniformity (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054422101536X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:234:y:2021:i:c:s036054422101536x

DOI: 10.1016/j.energy.2021.121288

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().