Control of Liquid Cooling Garments: Subjective versus Technical Control of Thermal Comfort.

1995 ◽  
Vol 14 (6) ◽  
pp. 271-278 ◽  
Author(s):  
Martin Hexamer ◽  
Jurgen Werner
Keyword(s):  
Thermal Comfort ◽  
Liquid Cooling ◽  
Technical Control ◽  
Cooling Garments

A Statistical Study to Evaluate the Performance of Liquid Cooling Garments Considering Thermal Comfort

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Weicheng Shu ◽  
Jiawen Wang ◽  
Xinfeng Zhang ◽  
Xiaobing Luo
Keyword(s):  
Thermal Comfort ◽  
Optimization Design ◽  
Working Time ◽  
Orthogonal Experimental Design ◽  
Thermal Manikin ◽  
Inlet Temperature ◽  
Liquid Cooling ◽  
Time Ratio ◽  
Key Factor ◽  
Cooling Garments

Abstract Liquid cooling garments (LCGs) are considered feasible cooling equipment to protect individuals from hyperthermia and heat-related illness when working in extremely hot and stressful environments. So far, the goals for the optimization design of LCGs are mostly from the perspective of enhancing its efficiency and working time. However, thermal comfort is the key factor that is often not considered. In fact, many situations may cause discomfort. For example, the inlet temperature of the liquid-cooling vest changes constantly resulting in the change of thermal states of the human body. So, it is very significative to develop a method to evaluate the performance of LCGs considering thermal comfort. In this paper, an uncomfortable time ratio was proposed to evaluate the performance of LCGs considering thermal comfort. A series of tests were conducted by a modified thermal manikin method to evaluate the thermal properties. According to the analyses, the duration working time was 82.77 min, while the uncomfortable time ratio was too large, up to 57.6%. It showed that the thermal comfort should be considered when optimizing the performance of LCGs. The influences of different parameters such as volume of ice, flowrate, inlet temperature on the performance of LCGs were investigated through orthogonal experimental design. The statistical analysis illustrated that the influence of the volume of ice on the uncomfortable time ratio is greater than that of flowrate and ambient temperature. It is concluded that this method is useful for the control and design of LCGs considering thermal comfort.

A Statistical Study to Evaluate the Performance of Liquid Cooling Garments Considering Thermal Comfort

2019 ◽  
Author(s):  
Weicheng Shu ◽  
Jiawen Wang ◽  
Xinfeng Zhang ◽  
Xiaobing Luo
Keyword(s):  
Thermal Comfort ◽  
Optimization Design ◽  
Working Time ◽  
Orthogonal Experimental Design ◽  
Thermal Manikin ◽  
Inlet Temperature ◽  
Liquid Cooling ◽  
Time Ratio ◽  
Key Factor ◽  
Cooling Garments

Abstract Liquid cooling garments (LCGs) are considered a feasible cooling equipment to protect individuals from hyperthermia and heat-related illness when working in extremely hot and stressful environments. So far, the goals for optimization design of LCGs are mostly from the perspective of enhancing its efficiency and duration working time. However, thermal comfort is the key factor which is often not considered. In fact, there are many situations that may cause discomfort. For example, as the ice melts, the inlet temperature of the liquid cooling vest changes constantly resulting in the change of thermal states of the human body, which lead to discomfort of human. So, it is very significative to develop a method to evaluate the performance of LCGs considering thermal comfort. In this paper, an uncomfortable time ratio was proposed to evaluate the performance of LCGs considering thermal comfort. It defined the proportion of uncomfortable time including overcooling and overheating in the entire working time. Series of tests were conducted by a modified thermal manikin method to evaluate the thermal properties. According to the analyses, the duration working time was 82.77 min, while the uncomfortable time ratio was too large, up to 57.6 %. It showed that the requirement of comfort should be considered when optimizing the performance of LCGs. The influences of different parameters such as the volume of ice, flowrate, inlet temperature on the performance of LCGs were investigated through orthogonal experimental design. The statistical analysis illustrated that the influence of the volume of ice on the uncomfortable time ratio is greater than that of flowrate and ambient temperature. It is concluded that this method is useful for the control and design of LCGs considering thermal comfort.

173. Comparing Thermal Manikin and Physiological Testing Results to Assess the Performance of Liquid Cooling Garments

2004 ◽  
Author(s):  
K. Semeniuk ◽  
J. Dionne ◽  
A. Makris ◽  
T. Bernard ◽  
C. Ashley ◽  
...  
Keyword(s):  
Thermal Manikin ◽  
Liquid Cooling ◽  
Cooling Garments

Effects of two cooling garments on post-exercise thermal comfort of female subjects in the heat

2015 ◽  
Vol 16 (6) ◽  
pp. 1403-1409 ◽  
Author(s):  
Mengmeng Zhao ◽  
Chuansi Gao ◽  
Jun Li ◽  
Faming Wang
Keyword(s):  
Thermal Comfort ◽  
Post Exercise ◽  
Cooling Garments ◽  
Female Subjects

Comparison of Shortened and Standard Liquid Cooling Garments to Provide Physiological and Subjective Comfort During EVA

2004 ◽  
Author(s):  
Victor S. Koscheyev ◽  
Gloria R. Leon ◽  
Aitor Coca ◽  
Jinny Ferl ◽  
David Graziosi
Keyword(s):  
Liquid Cooling ◽  
Cooling Garments

EFFICACY OF LIQUID COOLING GARMENTS TO MINIMIZE HEAT STRAIN DURING SPACE SHUTTLE DEORBIT AND LANDING.

1999 ◽  
Vol 31 (Supplement) ◽  
pp. S305 ◽  
Author(s):  
D. W. Rimmer ◽  
D-J. Dijk ◽  
J. M. Ronda ◽  
R. Hoyt ◽  
J. A. Pawelczyk
Keyword(s):  
Space Shuttle ◽  
Heat Strain ◽  
Liquid Cooling ◽  
Cooling Garments

scholarly journals Using a Sweating Manikin, Controlled by a Human Physiological Model, to Evaluate Liquid Cooling Garments

2005 ◽  
Author(s):  
Robert Farrington ◽  
John Rugh ◽  
Desikan Bharathan ◽  
Heather Paul ◽  
Grant Bue ◽  
...  
Keyword(s):  
Physiological Model ◽  
Liquid Cooling ◽  
Cooling Garments
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