Next Article in Journal
Micron-Scale Anomalous Hall Sensors Based on FexPt1−x Thin Films with a Large Hall Angle and near the Spin-Reorientation Transition
Next Article in Special Issue
Biosynthesis of Silver Nanoparticles and Their Applications in Harvesting Sunlight for Solar Thermal Generation
Previous Article in Journal
NiCo2O4/RGO Hybrid Nanostructures on Surface-Modified Ni Core for Flexible Wire-Shaped Supercapacitor
Previous Article in Special Issue
Heat Transfer Enhancement of Small-Diameter Two-Phase Closed Thermosyphon Using Cellulose Nanofiber and Hydrophilic Surface Modification
Article

Thermal-Hydraulic Analysis of Parabolic Trough Collectors Using Straight Conical Strip Inserts with Nanofluids

1
Department of Mechanical, Aerospace and Civil Engineering, School of Engineering, University of Manchester, Manchester M13 9PL, UK
2
Mechanical Technical Department, Technical Institute of Anbar, Middle Technical University, Baghdad 10066, Iraq
3
Department of Mechanical Engineering, College of Engineering, Khalifa University, Abu Dhabi 12277, United Arab Emirates
*
Authors to whom correspondence should be addressed.
Academic Editor: Javier Navas
Nanomaterials 2021, 11(4), 853; https://doi.org/10.3390/nano11040853
Received: 25 February 2021 / Revised: 17 March 2021 / Accepted: 24 March 2021 / Published: 26 March 2021
(This article belongs to the Special Issue Nanofluids for Thermal Solar Energy)
In this study, we numerically investigated the effect of swirl inserts with and without nanofluids over a range of Reynolds numbers for parabolic trough collectors with non-uniform heating. Three approaches were utilized to enhance the thermal-hydraulic performance—the variation of geometrical properties of a single canonical insert to find the optimized shape; the use of nanofluids and analysis of the effect of both the aforementioned approaches; the use of swirl generators and nanofluids together. Results revealed that using the straight conical strips alone enhanced the Nusselt number by 47.13%. However, the use of nanofluids along with the swirl generators increased the Nusselt number by 57.48%. These improvements reduced the thermal losses by 22.3% for swirl generators with nanofluids, as opposed to a reduction of only 15.7% with nanofluids alone. The investigation of different swirl generator designs showed various levels of improvements in terms of the overall thermal efficiency and thermal exergy efficiency. The larger swirl generator (H30mm-θ30°-N4) with 6% SiO2 nanofluids was found to be the optimum configuration, which improved the overall collector efficiency and thermal exergy by 14.62% and 14.47%, respectively. View Full-Text
Keywords: heat transfer; swirl generators; non-uniform heating; parabolic solar trough collectors; solar thermal energy; thermal and hydraulic performance heat transfer; swirl generators; non-uniform heating; parabolic solar trough collectors; solar thermal energy; thermal and hydraulic performance
Show Figures

Figure 1

MDPI and ACS Style

Abed, N.; Afgan, I.; Iacovides, H.; Cioncolini, A.; Khurshid, I.; Nasser, A. Thermal-Hydraulic Analysis of Parabolic Trough Collectors Using Straight Conical Strip Inserts with Nanofluids. Nanomaterials 2021, 11, 853. https://doi.org/10.3390/nano11040853

AMA Style

Abed N, Afgan I, Iacovides H, Cioncolini A, Khurshid I, Nasser A. Thermal-Hydraulic Analysis of Parabolic Trough Collectors Using Straight Conical Strip Inserts with Nanofluids. Nanomaterials. 2021; 11(4):853. https://doi.org/10.3390/nano11040853

Chicago/Turabian Style

Abed, Nabeel, Imran Afgan, Hector Iacovides, Andrea Cioncolini, Ilyas Khurshid, and Adel Nasser. 2021. "Thermal-Hydraulic Analysis of Parabolic Trough Collectors Using Straight Conical Strip Inserts with Nanofluids" Nanomaterials 11, no. 4: 853. https://doi.org/10.3390/nano11040853

Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop