‘Liquid window’ harnesses light and heat to save energy in buildings – Japan Today

A newly developed “liquid window” can block sunlight to keep a building cool but also absorb heat to be gradually released during the day or night to cut energy costs, scientists said.
The window, invented by researchers at Nanyang Technological University, Singapore (NTU), uses a hydrogel-based liquid between glass panels and was found to reduce energy consumption in buildings by up to 45% compared to traditional glass windows.
It was also about 30% more energy-efficient than commercially available…

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