AUB ScholarWorks

Body cooling methods for improving endurance in hot environments at minimal energy.

Show simple item record Itani, Mariam Mounir 2020-03-27T16:54:35Z 2020-03-27T16:54:35Z 2018 2018
dc.identifier.other b22058412
dc.description Dissertation. Ph.D. American University of Beirut. Department of Mechanical Engineering, 2018. ED:98
dc.description Advisor : Dr. Nesreen Ghaddar, Professor, Mechanical Engineering ; Members of Committee : Dr. Kamel Ghali, Professor, Mechanical Engineering ; Dr. Fadl Moukalled, Professor, Mechanical Engineering ; Dr. Mohammad Ahmad, Chemical and Petroleum Engineering ; Dr. Djamel Ouahrani, Assistant Professor, Architecture and Urban Planning, Qatar University ; Dr. Kalev Kuklane, Associate Professor, Design Sciences, Lund University.
dc.description Includes bibliographical references (leaves 103-110)
dc.description.abstract Personal cooling vests that incorporate phase change material (PCM) have been used to improve thermal sensation of people working outdoors in different fields (firefighting, construction, military, police, etc.). It is proposed in this study to investigate by modeling and experimentation the effect of applying different strategies to enhance the cooling effect of PCM vests and comfort of workers through: 1) targeting torso sensitive areas that trigger comfort; 2) using two PCM melting temperatures in one cooling vest and the possibility of reducing vest weight and 3) applying a two-bout strategy while reducing energy use, carried weight and material cost. A fabric-PCM model is developed and integrated with a bio-heat model to predict human thermal responses and comfort levels. Experiments on human subjects are done to validate the predictions of the integrated model and perform simulations to improve the PCM vest performance and apply the different proposed strategies. Since the PCM cooling vests have some disadvantages that involve the risk of condensation at their low temperature surface and the hindrance of moisture transport from the microclimate air near the skin to the environment, a PCM-Desiccant packet is proposed for use in cooling vests. A fabric-PCM-Desiccant model is developed and validated with experiments on a wet clothed heated cylinder. The different vest models are integrated with a bio-heat model to assess at which ambient conditions and human activity the different systems would provide enhanced cooling.
dc.format.extent 1 online resource (xviii, 110 leaves) : illustrations (some color)
dc.language.iso eng
dc.subject.classification ED:000098
dc.subject.lcsh Heat -- Transmission -- Mathematical models.
dc.subject.lcsh Human beings -- Experiments.
dc.subject.lcsh Textile fabrics.
dc.subject.lcsh Thermal properties.
dc.subject.lcsh Clothing workers.
dc.subject.lcsh Cooling.
dc.subject.lcsh Mathematical optimization.
dc.title Body cooling methods for improving endurance in hot environments at minimal energy.
dc.type Dissertation
dc.contributor.department Department of Mechanical Engineering
dc.contributor.faculty Maroun Semaan Faculty of Engineering and Architecture
dc.contributor.institution American University of Beirut

Files in this item

This item appears in the following Collection(s)

Show simple item record

Search AUB ScholarWorks


My Account