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Trap 'Water' between Glasses

32 Pages Posted: 13 Aug 2019 Publication Status: Review Complete

See all articles by Yang Zhou

Yang Zhou

Nanyang Technological University (NTU) - School of Materials Science and Engineering

Shancheng Wang

Nanyang Technological University (NTU) - School of Materials Science and Engineering

Jinqing Peng

Hunan University - College of Civil Engineering

Yutong Tan

Hunan University - College of Civil Engineering

Yi Long

Nanyang Technological University (NTU) - School of Materials Science and Engineering

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Abstract

Buildings account for 40% of global energy consumption, while windows are the least energy-efficient part of buildings. Conventional smart windows only regulate solar transmission. For the first time, we developed high thermal energy storage thermochromic smart window (HTEST smart window) by trapping the liquid hydrogel within triple-glazed glass. The outstanding specific heat capacity in liquid hydrogel together with excellent thermochromic property (90% of luminous transmittance and 68.1% solar modulation) and good thermal insulation gives the HTEST smart window excellent energy storage and conservation performance. Simulations suggested that HTEST window can save 15.3% more energy than the double-glazed low-E glass. In outdoor demonstrations, the HTEST smart window significantly lowered the room temperature ~30°C in summer compared with the double-glazed glass. Compared with conventional energy-saving glasses which need expensive equipment, the “water” trapped structure offers a disruptive strategy of easy fabrication and scale-up, which opens an avenue for energy-saving buildings and greenhouses.

Keywords: Thermal energy storage, Liquid hydrogel, Smart window, Thermochromic, Energy saving

Suggested Citation

Zhou, Yang and Wang, Shancheng and Peng, Jinqing and Tan, Yutong and Long, Yi, Trap 'Water' between Glasses (August 12, 2019). Available at SSRN: https://ssrn.com/abstract=3436232 or http://dx.doi.org/10.2139/ssrn.3436232
This is a paper under consideration at Cell Press and has not been peer-reviewed.

Yang Zhou

Nanyang Technological University (NTU) - School of Materials Science and Engineering

S3 B2-A28 Nanyang Avenue
Singapore, 639798
Singapore

Shancheng Wang

Nanyang Technological University (NTU) - School of Materials Science and Engineering

S3 B2-A28 Nanyang Avenue
Singapore, 639798
Singapore

Jinqing Peng

Hunan University - College of Civil Engineering

2 Lushan South Rd
Changsha, Hunan 410082
China

Yutong Tan

Hunan University - College of Civil Engineering

2 Lushan South Rd
Changsha, Hunan 410082
China

Yi Long (Contact Author)

Nanyang Technological University (NTU) - School of Materials Science and Engineering ( email )

S3 B2-A28 Nanyang Avenue
Singapore, 639798
Singapore

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