Temperature-adaptive radiative coating for all-season household thermal regulation

Author:

Tang Kechao123ORCID,Dong Kaichen12ORCID,Li Jiachen24ORCID,Gordon Madeleine P.45ORCID,Reichertz Finnegan G.6ORCID,Kim Hyungjin27ORCID,Rho Yoonsoo8ORCID,Wang Qingjun12ORCID,Lin Chang-Yu1ORCID,Grigoropoulos Costas P.8,Javey Ali27ORCID,Urban Jeffrey J.5ORCID,Yao Jie12ORCID,Levinson Ronnen9ORCID,Wu Junqiao124ORCID

Affiliation:

1. Department of Materials Science and Engineering, University of California, Berkeley, CA 94720, USA.

2. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

3. Key Laboratory of Microelectronic Devices and Circuits (MOE), School of Integrated Circuits, Peking University, Beijing 100871, P. R. China.

4. Applied Science and Technology Graduate Group, University of California, Berkeley, CA, 94720, USA.

5. The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

6. East Bay Innovation Academy, 3800 Mountain Blvd., Oakland, CA 94619, USA.

7. Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA.

8. Department of Mechanical Engineering, University of California, Berkeley, CA 94720, USA.

9. Heat Island Group, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA.

Abstract

A passive turnoff Passive radiative cooling technology uses the infrared atmospheric window to allow outer space to be a cold sink for heat. However, this effect is one that is only helpful for energy savings in the warmer months. Wang et al . and Tang et al . used the metal-insulator transition in tungsten-doped vanadium dioxide to create window glass and a rooftop coating that circumvents this problem by turning off the radiative cooling at lower temperatures. Because the transition is simply temperature dependent, this effect also happens passively. Model simulations suggest that these materials would lead to energy savings year-round across most of the climate zones in the United States. —BG

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference104 articles.

1. US Energy Information Administration “Annual Energy Review 2020” (2020); https://www.eia.gov/totalenergy/data/annual/

2. US Energy Information Administration “2015 Residential Energy Consumption Survey” (2015); https://www.eia.gov/consumption/residential/

3. A Subambient Open Roof Surface under the Mid-Summer Sun

4. Nighttime radiative cooling in hot and humid climates

5. Radiative cooling efficiency of white pigmented paints

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