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A dual-mode textile for human body radiative heating and cooling
- Source :
- Science Advances
- Publication Year :
- 2017
- Publisher :
- American Association for the Advancement of Science, 2017.
-
Abstract
- Dual-mode textiles made of nanoPE provide both cooling and heating, which helps humans adapt to larger temperature changes.<br />Maintaining human body temperature is one of the most basic needs for living, which often consumes a huge amount of energy to keep the ambient temperature constant. To expand the ambient temperature range while maintaining human thermal comfort, the concept of personal thermal management has been recently demonstrated in heating and cooling textiles separately through human body infrared radiation control. Realizing these two opposite functions within the same textile would represent an exciting scientific challenge and a significant technological advancement. We demonstrate a dual-mode textile that can perform both passive radiative heating and cooling using the same piece of textile without any energy input. The dual-mode textile is composed of a bilayer emitter embedded inside an infrared-transparent nanoporous polyethylene (nanoPE) layer. We demonstrate that the asymmetrical characteristics of both emissivity and nanoPE thickness can result in two different heat transfer coefficients and achieve heating when the low-emissivity layer is facing outside and cooling by wearing the textile inside out when the high-emissivity layer is facing outside. This can expand the thermal comfort zone by 6.5°C. Numerical fitting of the data further predicts 14.7°C of comfort zone expansion for dual-mode textiles with large emissivity contrast.
- Subjects :
- Materials science
Textile
Infrared
Infrared Rays
Mechanical engineering
02 engineering and technology
Heat transfer coefficient
010402 general chemistry
01 natural sciences
Body Temperature
Nanopores
Wearable Electronic Devices
Emissivity
Humans
Research Articles
Common emitter
Multidisciplinary
business.industry
Textiles
Temperature
Thermal comfort
SciAdv r-articles
Atmospheric temperature range
021001 nanoscience & nanotechnology
0104 chemical sciences
Applied Sciences and Engineering
Polyethylenes
0210 nano-technology
business
Layer (electronics)
Research Article
Subjects
Details
- Language :
- English
- ISSN :
- 23752548
- Volume :
- 3
- Issue :
- 11
- Database :
- OpenAIRE
- Journal :
- Science Advances
- Accession number :
- edsair.doi.dedup.....019e8fbf941f563797cde1885471cb87