Enhancement of solar chimney performance by passive vortex generator

Yahya Sheikhnejad and Seyed Abdolreza Gandjalikhan Nassab

Renewable Energy, 2021, vol. 169, issue C, 437-450

Abstract: According to the global consensus on mitigation of greenhouse gas and human footprint as well as improvement of industrial sustainability by the exploitation of renewable energy, the mission of this study dedicated to the performance enhancement of planar solar chimneys in converting much more solar radiation into air enthalpy by vortex generation technique. For this purpose, a passive vortex generator (VG) as an inexpensive but effective approach is employed for the enhancement of heat transfer. The well-developed commercial software of COMSOL Multiphysics was used for two-way modeling and simulation of sophisticated fluid-solid interaction in transient turbulent natural convection heat transfer phenomena. An extensive comparison has been made between two configurations of solar chimney namely with and without VG. According to the numerical results, the natural vibration of elastic VG induces moving vortices into the flow field which is also responsible for the enhancement of natural convection heat transfer by mixing and reducing the thermal boundary layer. Moreover, the VG significantly improves ΔToutlet up to 300% and also decreases the temperature of the absorber surface more than 50% which is under constant heat flux. Both of these factors lead to higher performance for natural air heater.

Keywords: Solar chimney; Vortex generator; Heat transfer enhancement; Renewable energy (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S096014812100032X
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:437-450

DOI: 10.1016/j.renene.2021.01.026

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 ().