Experimental study on using PCMs of different melting temperatures in one cooling vest to reduce its weight and improve comfort

Ouahrani, Djamel; Itani, Mariam; Ghaddar, Nesreen; Ghali, Kamel; Khater, Beatrice

doi:10.1016/j.enbuild.2017.09.057

Cited by 33 publications

(9 citation statements)

References 52 publications

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“…The PCM vest contributed to a maximum skin temperature and body heat storage reduction of 5.45°C and 64 W, respectively. Thermal comfort with a PCM vest was reported to be 2.0, which was found to be within the acceptable level compared with subjects without a PCM vest of 3.67 146 …”

Section: Impact Of Pcm‐embedded Vest On Personal Thermal Comfortmentioning

confidence: 83%

“…Thermal comfort with a PCM vest was reported to be 2.0, which was found to be within the acceptable level compared with subjects without a PCM vest of 3.67. 146 Current research has revealed that wearing a PCM vest could improve the well-being of the most vulnerable people during physical activities, especially among those with underlying chronic health conditions. 23,138 An example of such a health problem is paraplegia (PA), which refers to impaired spinal cord function due to injuries, where people with such conditions become prone to thermal stress levels during active physical exercises.…”

Section: Personal Cooling Effect Of Pcm During Physical Activitymentioning

confidence: 99%

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Influence of phase change materials on thermal comfort, greenhouse gas emissions, and potential indoor air quality issues across different climatic regions: A critical review

Amoatey

Al‐Jabri

Al‐Saadi

2022

Intl J of Energy Research

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There has been growing interest in applying phase change materials (PCMs) in buildings owing to their energy conservation/latent heat storage properties and potential to improve thermal comfort. Various reviews have extensively discussed the thermophysical properties of PCMs and their energy-saving potential in buildings. However, comprehensive reviews on the indoor thermal/ personal comfort behavior of PCMs under different climates remain limited. Therefore, this study aims to present a comprehensive state-of-the-art review of the impact of PCMs on indoor thermal comfort levels in buildings located in cities within different subclimate zones and their personal cooling effect when integrated with clothing (vest). In addition, greenhouse gas (GHG) mitigation potentials and indoor air pollutant emission properties of PCM-enhanced buildings were also reviewed. Hundreds of published articles of PCMs in PubMed and Scopus databases, including a manual search approach, were utilized. The results from this state-of-the-art study have shown that incorporating PCMs in buildings satisfactorily reduced the indoor air temperature of most buildings located in hot climate (BSh, BWh) zones, but very limited studies have been performed in the cold (Dfc, BSk) environments. In general, there was an improvement in the thermal comfort levels of the PCM-enhanced buildings. However, these were mostly assessed using indices such as predicted mean vote, predicted percentage of dissatisfied, comfort index, and total discomfort change, without any comprehensive survey studies (eg, based on

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Section: Impact Of Pcm‐embedded Vest On Personal Thermal Comfortmentioning

confidence: 83%

Section: Personal Cooling Effect Of Pcm During Physical Activitymentioning

confidence: 99%

Influence of phase change materials on thermal comfort, greenhouse gas emissions, and potential indoor air quality issues across different climatic regions: A critical review

Amoatey

Al‐Jabri

Al‐Saadi

2022

Intl J of Energy Research

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“…The chance of risky behaviors increased concomitantly with environmental temperatures above 24 • C [3]. Personal cooling is one of the methods suggested for decreasing heat stress and improving thermal comfort of outdoor workers; since, in such conditions, air-conditioning systems are not effective [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Efficacy of a Novel Personal Cooling Vest Incorporated with Phase Change Materials and Fans

Yao

Zhang

et al. 2020

Materials

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In recent years, personal cooling has aroused much attention because it can achieve both localized high-level thermal comfort and build energy savings. In this study, a novel hybrid personal cooling vest (PCV) incorporated with phase change materials (PCMs) and ventilation fans was developed, and its efficacy was investigated by human trials in a hot-humid climate chamber. Three generally accepted indices (thermal load, Q; thermal sensation, TS; and physiological strain index, PSI) and a new proposed index (cumulative heat storage, CHS) during human trials were comparatively studied between the two human trial groups, i.e., the PCV group (wearing the PCV) and the CON group (without PCV). Results found that TS, PSI, and CHS were significantly reduced by the PCV, which suggests that the PCV can significantly improve both the perceptual and physiological strain. In addition, a strong linear relationship (r2 = 0.8407) was found between the proposed index of CHS with PSI, which indicates the applicability and reliability of CHS for assessing physiological heat strain.

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“…Several different techniques and procedures have been used in the past for developing an efficient cooling vest, the method for developing a cooling vest varies from material to material. The techniques used in past includes Fluid cooling garments (FCGs) [11], Phase change materials (PCMs) [6,12,13], and evaporative techniques [14,15]. The cooling technique should be selected based on ambient conditions (temperature, type of attire, work severity) along with operating conditions (cooling period, the weight of vest, mobility, and compactness) and type of system (area of cooling i.e.…”

Section: Introductionmentioning

confidence: 99%

Study on an Evaporative Cooling Vest for Farm Workers

Maqsood¹,

Mahmood²,

Mahmood³

et al. 2020

Proceedings of International Exchange and Innovation Conference on Engineering &Amp; Sciences (IEICES)

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The prolonged manifestation of workers working in warm and moist atmospheric conditions results in their decreased labour work productivity, excessive sweating, and heat stress. Flexible and comfortable cooling vests are an appropriate solution to enhance labour work productivity. The study aims to determine the cooling efficiency of the material. A model is developed work on the principle of indirect evaporative cooling (IDEC) provides cooled air without adding humidity i.e. latent heat of vaporization is transferred to working air, which makes more doable over the direct evaporative cooling (DEC). The performance of three different hygroscopic materials is evaluated on the base of the following parameters including ambient air temperature, primary and secondary air temperature, and relative humidity. This study shows that aspen pads have proven to be the most appropriate hygroscopic material in achieving a minimum temperature difference of 7° at ambient temperature and relative humidity.

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Experimental study on using PCMs of different melting temperatures in one cooling vest to reduce its weight and improve comfort

Cited by 33 publications

References 52 publications

Influence of phase change materials on thermal comfort, greenhouse gas emissions, and potential indoor air quality issues across different climatic regions: A critical review

Influence of phase change materials on thermal comfort, greenhouse gas emissions, and potential indoor air quality issues across different climatic regions: A critical review

Experimental Study on the Efficacy of a Novel Personal Cooling Vest Incorporated with Phase Change Materials and Fans

Study on an Evaporative Cooling Vest for Farm Workers

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