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Title: Evaluating the effectiveness of cooling vest in a hot and humid environment
Authors: Yi, W 
Zhao, YJ 
Chan, APC 
Keywords: Construction workers
Hybrid cooling vest
Issue Date: 2017
Publisher: Oxford University Press
Source: Annals of work exposures and health, 2017, v. 61, no. 4, p. 481-494 How to cite?
Journal: Annals of work exposures and health 
Abstract: Objective: This study aims to evaluate the effectiveness of a newly designed hybrid cooling vest for construction workers in alleviating heat stress. Method: Two types of cooling vests, namely, a commonly worn Vest A and a newly designed Vest B, were tested in a climatic chamber environment (34.0 degrees C temperature, 60% relative humidity, and 0.4 m s(-1) air velocity) using a sweating thermal manikin. Four test scenarios were included: fan off with no phase change materials (PCMs) (Fan-off), fan on with no PCMs (Fan-on), fan off with completely solidified PCMs (PCM + Fan-off), and fan on with completely solidified PCMs (PCM + Fan-on). Result: Test results showed that Vests A and B provided a continuous cooling effect during the 3-h test. The average cooling power for the torso region of Vest B was 67 W, which was higher than that of Vest A (56 W). The addition of PCMs offered a cooling effect of approximately 60 min. Ventilation fans considerably improved the evaporative heat loss compared with the Fan-off condition. Conclusion: The newly designed hybrid cooling vest (Vest B) may be an effective means to reduce heat strain and enhance work performance in a hot and humid environment.
ISSN: 2398-7308
EISSN: 2398-7316
DOI: 10.1093/annweh/wxx007
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