3D printed smart windows for adaptive solar modulations

Vanadium dioxide (VO2) based thermochromic smart window is considered as the most promising approach for economizing building energy consumption. However, the high phase transition temperature (τc), low luminous transmission (Tlum), and solar modulation (ΔTsol) impose an invertible challenge for com...

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Main Authors: Zhou, Chengzhi, Li, Dan, Tan, Yutong, Ke, Yujie, Wang, Shancheng, Zhou, Yang, Liu, Guowei, Wu, Shaofan, Peng, Jinqing, Li, Anran, Li, Shuzhou, Chan, Siew Hua, Magdassi, Shlomo, Long, Yi
Other Authors: School of Materials Science and Engineering
Format: Article
Language:English
Published: 2020
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Online Access:https://hdl.handle.net/10356/141502
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-1415022022-11-30T09:06:34Z 3D printed smart windows for adaptive solar modulations Zhou, Chengzhi Li, Dan Tan, Yutong Ke, Yujie Wang, Shancheng Zhou, Yang Liu, Guowei Wu, Shaofan Peng, Jinqing Li, Anran Li, Shuzhou Chan, Siew Hua Magdassi, Shlomo Long, Yi School of Materials Science and Engineering School of Mechanical and Aerospace Engineering Interdisciplinary Graduate School (IGS) Singapore-HUJ Alliance for Research and Enterprise Nanomaterials for Energy and Energy Water Nexus Campus for Research Excellence and Technological Enterprise Energy Research Institute @ NTU (ERI@N) Engineering::Materials 3D Printing Energy Conservation Vanadium dioxide (VO2) based thermochromic smart window is considered as the most promising approach for economizing building energy consumption. However, the high phase transition temperature (τc), low luminous transmission (Tlum), and solar modulation (ΔTsol) impose an invertible challenge for commercialization. Currently, smart window research surprisingly assumes that the sunlight radiates in one direction which is obviously not valid as most regions receive solar radiation at various angles in different seasons. For the first time, solar elevation angle is considered and 3D printing technology is employed to fabricate tilted microstructures for modulating solar transmission dynamically. To maximize energy-saving performance, the architecture of the structures (tilt, thickness, spacing, and width) and tungsten (W) doped VO2 can be custom-designed according to the solar elevation angle variation at the midday between seasons and tackle the issue of compromised Tlum and ΔTsol with W-doping. The energy consumption simulations in different cities prove the efficiency of such dynamic modulation. This first attempt to adaptively regulate the solar modulation by considering the solar elevation angle together with one of the best reported thermochromic properties (τc = 40 °C, Tlum(average) = 40.8%, ΔTsol = 23.3%) may open a new era of real-world-scenario smart window research. 2020-06-09T01:52:35Z 2020-06-09T01:52:35Z 2020 Journal Article Zhou, C., Li, D., Tan, Y., Ke, Y., Wang, S., Zhou, Y., . . . Long, Y. (2020). 3D printed smart windows for adaptive solar modulations. Advanced Optical Materials, 8(11), 2000013-. doi:10.1002/adom.202000013 2195-1071 https://hdl.handle.net/10356/141502 10.1002/adom.202000013 2-s2.0-85082324591 11 8 2000013 (1 of 10) 2000013 (10 of 10) en Advanced Optical Materials 10.21979/N9/Y3AVVV This is the peer reviewed version of the following article: Zhou, C., Li, D., Tan, Y., Ke, Y., Wang, S., Zhou, Y., . . . Long, Y. (2020). 3D printed smart windows for adaptive solar modulations. Advanced Optical Materials, xxx, 2000013-, which has been published in final form at http://doi.org/10.1002/adom.202000013. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Materials
3D Printing
Energy Conservation
spellingShingle Engineering::Materials
3D Printing
Energy Conservation
Zhou, Chengzhi
Li, Dan
Tan, Yutong
Ke, Yujie
Wang, Shancheng
Zhou, Yang
Liu, Guowei
Wu, Shaofan
Peng, Jinqing
Li, Anran
Li, Shuzhou
Chan, Siew Hua
Magdassi, Shlomo
Long, Yi
3D printed smart windows for adaptive solar modulations
description Vanadium dioxide (VO2) based thermochromic smart window is considered as the most promising approach for economizing building energy consumption. However, the high phase transition temperature (τc), low luminous transmission (Tlum), and solar modulation (ΔTsol) impose an invertible challenge for commercialization. Currently, smart window research surprisingly assumes that the sunlight radiates in one direction which is obviously not valid as most regions receive solar radiation at various angles in different seasons. For the first time, solar elevation angle is considered and 3D printing technology is employed to fabricate tilted microstructures for modulating solar transmission dynamically. To maximize energy-saving performance, the architecture of the structures (tilt, thickness, spacing, and width) and tungsten (W) doped VO2 can be custom-designed according to the solar elevation angle variation at the midday between seasons and tackle the issue of compromised Tlum and ΔTsol with W-doping. The energy consumption simulations in different cities prove the efficiency of such dynamic modulation. This first attempt to adaptively regulate the solar modulation by considering the solar elevation angle together with one of the best reported thermochromic properties (τc = 40 °C, Tlum(average) = 40.8%, ΔTsol = 23.3%) may open a new era of real-world-scenario smart window research.
author2 School of Materials Science and Engineering
author_facet School of Materials Science and Engineering
Zhou, Chengzhi
Li, Dan
Tan, Yutong
Ke, Yujie
Wang, Shancheng
Zhou, Yang
Liu, Guowei
Wu, Shaofan
Peng, Jinqing
Li, Anran
Li, Shuzhou
Chan, Siew Hua
Magdassi, Shlomo
Long, Yi
format Article
author Zhou, Chengzhi
Li, Dan
Tan, Yutong
Ke, Yujie
Wang, Shancheng
Zhou, Yang
Liu, Guowei
Wu, Shaofan
Peng, Jinqing
Li, Anran
Li, Shuzhou
Chan, Siew Hua
Magdassi, Shlomo
Long, Yi
author_sort Zhou, Chengzhi
title 3D printed smart windows for adaptive solar modulations
title_short 3D printed smart windows for adaptive solar modulations
title_full 3D printed smart windows for adaptive solar modulations
title_fullStr 3D printed smart windows for adaptive solar modulations
title_full_unstemmed 3D printed smart windows for adaptive solar modulations
title_sort 3d printed smart windows for adaptive solar modulations
publishDate 2020
url https://hdl.handle.net/10356/141502
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