Exergy Analysis and Human Body Thermal Comfort Conditions: Evaluation of Different Body Compositions

PurposeDesign of bedding textiles that contact the human body affects the sleep quality. Bedding textiles contribute to comfort sense during the sleep duration, in addition to ambient and bed microclimate. The purpose of this study is to evaluate the effects of different layer properties on the compression recovery and thermal characteristics of multilayer bedding textiles.Design/methodology/approachIn this study, woven and knitted multilayer bedding textiles were manufactured from fabric, fiber, sponge and interlining, respectively. Different sponge thickness, fiber and interlining weight were used in the layers of samples. Later, the pilling resistance, compression and recovery, air permeability and thermal conductivity of multilayer bedding textiles were investigated.FindingsThe results indicated that samples with the higher layer weight and thickness provide better compression recovery and lower air permeability properties. It was also found that knitted surfaces show the higher air permeability than the woven surfaces depending on the fabric porosity. Layer properties have insignificant effect on the thermal conductivity values.Originality/valueWhile researchers mostly focus on thermal comfort properties of garments, there are limited studies about comfort properties of bedding textiles in the literature. Furthermore, compression recovery properties of bedding textiles have also a great importance in terms of comfort. Originality of this study is that these properties were analyzed together.

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Analysis of EEG, Cardiac Activity Status, and Thermal Comfort According to the Type of Cooling Seat during Rest in Indoor Temperature

Applied Sciences ◽

10.3390/app11010097 ◽

2020 ◽

Vol 11 (1) ◽

pp. 97

Author(s):

Yunchan Shin ◽

Minjung Lee ◽

Honghyun Cho

Keyword(s):

Thermal Comfort ◽

Human Body ◽

Cold Water ◽

Cardiac Activity ◽

Satisfaction Level ◽

Water Cooling ◽

Indoor Temperature ◽

Sensorimotor Rhythm ◽

Electroencephalogram Eeg ◽

Wave Reduction

In this study, electroencephalogram (EEG) and cardiac activity status of the human body while using various types of seats during rest were analyzed in indoor summer conditions. Thermal comfort was also evaluated through a subjective survey. The EEG, cardiac activity status, and subjective survey during rest indicated that the use of ventilation and cold water-cooling seats was effective. This effectiveness was because of the θ-wave and α-wave activation, sensorimotor rhythm, β-wave reduction, and left hemisphere activation, demonstrating that the conditions applied were suitable for rest. According to the analysis of the subjective questionnaire survey, the use of ventilation and cold water-cooling seats provided a more pleasant state than the basic seat, improving the subject’s warmth and comfort, and also the concentration. In addition, the use of a cold water-cooling seat provided the highest satisfaction level, being the most favorable condition for rest.

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A generalized model of human body radiative heat exchanges for optimal design of indoor thermal comfort conditions

Solar Energy ◽

10.1016/j.solener.2018.10.052 ◽

2018 ◽

Vol 176 ◽

pp. 556-571 ◽

Cited By ~ 4

Author(s):

Concettina Marino ◽

Antonino Nucara ◽

Giorgia Peri ◽

Matilde Pietrafesa ◽

Gianfranco Rizzo

Keyword(s):

Optimal Design ◽

Thermal Comfort ◽

Human Body ◽

Radiative Heat ◽

Generalized Model ◽

Indoor Thermal Comfort ◽

Heat Exchanges

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Design and Optimization of Air Supply System to Satisfy the Thermal Comfort of Human Body

10.1007/978-981-16-5963-8_83 ◽

2021 ◽

pp. 609-616

Author(s):

Jue Qu ◽

Hongjun Xue ◽

Wei Wang ◽

Sina Dang ◽

Xiaoyan Zhang

Keyword(s):

Thermal Comfort ◽

Human Body ◽

Supply System ◽

Design And Optimization ◽

Air Supply

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