Energetic and exergetic efficiency analysis of a v-corrugated solar air heater integrated with twisted tape inserts

Ammar A. Farhan, Aljubury Issam M.Ali and Hamdi E. Ahmed

Renewable Energy, 2021, vol. 169, issue C, 1373-1385

Abstract: The present study provides an analytical and numerical investigation of the energy and exergy analysis of a v-corrugated solar air heater (VCSAH) integrated with twisted tape insert (TTI). The TTI is placed in the air passages formed by the absorber and backplates. The effect of design parameters such as twisted tape ratio (Y) and the number of channels (N) on the thermo-hydraulic performance is examined for a wide range of Reynolds number (Re) under realistic weather conditions data. The results reveal that as the Y decreases, the thermo-hydraulic efficiency of VCSAH-TTI is first rises to a specific value of Re to reach the peak value, and then drops down. The optimal number of channels that provides maximum thermo-hydraulic efficiency is N = 5 when the TTI is implemented. The maximum thermal and thermo-hydraulic efficiencies of VCSAH-TTI observed are 17.5 and 17%, respectively, compared to the VCSAH without TTI. Besides, the thermal efficiency is directly proportional to the number of channels. At Re = 10,000, the thermal efficiency is found to be 69.3% and 76.7% for N = 4 and N = 14, respectively. The accumulated useful heat gain of the proposed design is 17% higher than VCSAH without TTI.

Keywords: Energetic efficiency; Exergetic efficiency; Twisted tape; V-corrugated absorbing plate; Solar air heater (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0960148121001166
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:renene:v:169:y:2021:i:c:p:1373-1385

DOI: 10.1016/j.renene.2021.01.109

Access Statistics for this article

Renewable Energy is currently edited by Soteris A. Kalogirou and Paul Christodoulides

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