Show simple item record

AuthorGhani, Saud
AuthorElBialy, Esmail Mohame Ali Ahmed
AuthorBakochristou, Foteini
AuthorMahmoud, Seifelislam
AuthorGamaledin, Ahmad
AuthorRashwan, Mohammed Mohammed
Available date2021-02-08T09:14:54Z
Publication Date2017
Publication NameApplied Thermal Engineering
ResourceScopus
URIhttp://dx.doi.org/10.1016/j.applthermaleng.2016.09.142
URIhttp://hdl.handle.net/10576/17628
AbstractSafety helmets are essential Personal Protecting Equipment (PPE) in all industrial and construction sites. When temperature and humidity levels are high, users' thermal comfort is adversely affected. This paper examines the utilization of forced convection and Phase Changing Material (PCM) to control the thermal comfort of helmet users. An experimentally validated three-dimensional Computational Fluid Dynamics (CFD) model of an industrial helmet and a human head was utilized to assess the helmet thermal performance under different harsh working environments. The standard k-? turbulence model was used to investigate the helmet cooling performance and to assess the user's thermal comfort at different ambient conditions. Energy and mass conservation equations were implemented in the calculation. The effect of solar radiation, forced convection and PCM integration at different incident wind speeds on the helmet's thermal performance was assessed. The effect of sweating on mass and heat transfer of the modeled human head skin was examined. Results concluded that forced convection decreased the maximum temperature on the helmet outer surface by about 10 C. The PCM embedded in the helmet proved to prolong the thermal comfort period. Findings highlighted that the heat generated from the head is the dominant factor affecting the melting time of the PCM.
SponsorThis publication was made possible by the award [QUEX-CENG-ASPIRE-11/12-7] from the Aspire Zone Foundation, Doha, Qatar. The statements made herein are solely the responsibility of the authors.
Languageen
PublisherElsevier Ltd
SubjectCooled helmets and safety helmets
Forced convection
Phase Change Material (PCM)
Thermal comfort
TitleThe effect of forced convection and PCM on helmets' thermal performance in hot and arid environments
TypeArticle
Pagination624-637
Volume Number111
dc.accessType Abstract Only


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

Show simple item record