Improving performance of a trapezoidal-trough thermosyphon solar collector using peripherally wing-cut swirl generator. Issue 14 (14th November 2019)

• Record Type: Journal Article
• Authors: Murugan, M.; Vijayan, R.; Saravanan, A.
• Is Part Of: International journal of green energy. Volume 16:Issue 14(2019)
• Page Start: 1196
• Page End: 1209
• Publication Date: 2019-11-14
• Subjects: Tra-trough -- peripherally wing-cut -- trapezoidal wing -- rectangular wing -- triangular wing -- typical twist; Power resources -- Research -- Periodicals; Energy industries -- Periodicals; Energy development -- Periodicals; 333.79
• DOI: 10.1080/15435075.2019.1671395
• Languages: English
• ISSNs: 1543-5075

Abstract

ABSTRACT: In this present study, the performance of a newly modified solar collector named trapezoidal-trough solar collector (Tra-trough) has been examined using peripherally wing-cut swirl generator (PSG). The experiment has been executed at Government College of Engineering, Salem, Tamilnadu, India (Latitude: 11°66´N and Longitude: 78°15´E) with three different wing shapes including PSG with triangular wings (PSG-Tri), rectangular wings (PSG-Rec) and trapezoidal wings (PSG-Tra). The obtained results are contrasted with plain tube Tra-trough (TT-plain) solar collector under the same working condition. The experimental trials are made by keeping swirl ratio (Y = 3), wing-span ratio (b/W = 0.3) and wing-chord ratio (d/W = 0.4) as constant. The results obtained from the TT-plain are verified with the fundamental equations and found the deviations within ±11.21% for Nusselt number and ±8.24% for friction factor. From the experimental result, the PSG provides higher heat transfer rate over the TT-plain with/without typical swirl generator (TSG). The results also exposed that the PSG with trapezoidal wings (PSG-Tra) offers higher heat transfer rate and thermal efficiency than those given by other type of wing shapes. The thermal performance of trapezoidal wings (PSG-Tra) is enhanced up to 137% over the TT-plain. In addition, correlations for predicting the Nusselt number and friction factor have been developed. The deficiency of the predicted value for Nusselt number and friction factor are within ±10.31% and ±11.21%, respectively.