Title: A dual-mode textile for human body radiative heating and cooling

Abstract

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. As a result, numerical fitting of the data further predicts 14.7°C of comfort zone expansion for dual-mode textiles with large emissivity contrast.

Authors:

Hsu, Po -Chun  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-6509-9377"

Liu, Chong ^[1]; Song, Alex Y.  ^[1];

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• Search DOE PAGES for ORCID "0000-0003-0307-2184"

Zhang, Ze  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-3019-0138"

Peng, Yucan  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-7852-1541"

Xie, Jin  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-6270-1465"

Liu, Kai ^[1]; Wu, Chun -Lan  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-7124-1520"

Catrysse, Peter B.  ^[1];

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• Search DOE PAGES for ORCID "0000-0002-2389-6044"

Cai, Lili ^[1]; Zhai, Shang ^[1]; Majumdar, Arun ^[1]; Fan, Shanhui ^[1]; Cui, Yi  ^[2]

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• Search DOE PAGES for ORCID "0000-0002-6103-6352"

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+ Show Author Affiliations

1. Stanford Univ., Stanford, CA (United States)
2. Stanford Univ., Stanford, CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Publication Date:

Fri Nov 10 00:00:00 EST 2017

Research Org.:

SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Org.:

USDOE Advanced Research Projects Agency - Energy (ARPA-E)

OSTI Identifier:

1418218

Grant/Contract Number:  

award321725; AR0000533; AC02-76SF00515

Resource Type:

Accepted Manuscript

Journal Name:

Science Advances

Additional Journal Information:

Journal Volume: 3; Journal Issue: 11; Journal ID: ISSN 2375-2548

Publisher:

AAAS

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE