DataVXAdvanced Optical MaterialsPaper
journal article·2020-06

3D Printed Smart Windows for Adaptive Solar Modulations

Chengzhi Zhou, Dan Li, Yutong Tan, Yujie Ke, Shancheng Wang, Yang Zhou, Guowei Liu, Shaofan Wu, Jinqing Peng, Anran Li, Shuzhou Li, Siew Hua Chan, Shlomo Magdassi, Yi Long

Advanced Optical Materials· Volume 8· Issue 11
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Source abstract

Abstract

Abstract 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.
Source: crossref · Quality: baseline

Research context

Materials processing

OpenAlex topics: Transition Metal Oxide Nanomaterials · Urban Heat Island Mitigation · Building Energy and Comfort Optimization

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

Energy Research Institute @ NTU Interdisciplinary Graduate School Nanyang Technological University 50 Nanyang Drive Singapore 637553 Singapore

School of Mechanical and Aerospace Engineering Nanyang Technological University 50 Nanyang Avenue Singapore 639798 Singapore

College of Civil Engineering Hunan University Changsha Hunan 410082 P. R. China

Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences Fuzhou Fujian 350002 P. R. China

Beijing Advanced Innovation Center for Big Data‐Based Precision Medicine School of Chemistry Beihang University 37 Xueyuan Road, Haidian District Beijing 100083 P. R. China

Institute of Chemistry Edmond J. Safra Campus The Hebrew University of Jerusalem Jerusalem 919040 Israel

Singapore‐HUJ Alliance for Research and Enterprise (SHARE) Nanomaterials for Energy and Energy Water Nexus (NEW) Campus for Research Excellence and Technological Enterprise (CREATE) 1 Create Way Singapore 138602 Singapore

Sino‐Singapore International Joint Research Institute (SSIJRI) Guangzhou 510000 P. R. China

Funding

National Science Foundation, United Arab Emirates

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