Humidity-Controlled Smart Window with Synchronous Solar and Thermal Radiation Regulation
Guozheng Li1, Xiaofeng Jiang1, Hafiz Asfahan1
1Key Laboratory for Intelligent Nano Materials and Devices of Ministry of Education, and Institute for Frontier Science, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, China.
None:
Dynamic and continuous regulation of both solar and thermal radiation through windows is critical for enhancing building energy efficiency. However, achieving such adaptive regulations within a single window remains a formidable challenge. In this study, a humidity-responsive polytetrafluoroethylene (PTFE)/ polyvinyl alcohol (PVA) composite membrane is developed with a nanoporous structure and integrated between two layers of glass to engineer a humidity-controlled smart window. By modulating the humidity level between the glass layers, the smart window enables the dynamic and coordinated modulation of solar and thermal radiation via the reversible adsorption and desorption of water vapor by the PTFE/PVA composite. The results indicate that the humidity-controlled smart window demonstrates superior capabilities in solar modulation (54.4%) and thermal radiation modulation (51.4%). Statistical analysis reveals that compared to ordinary windows and low emissivity (Low-E) windows, PTFE/PVA windows reduce total annual energy consumption by ≈25% and 40%, respectively. This broadband dynamic continuous regulation mechanism may offer groundbreaking insights into the advancement of smart window technologies.
More Related Videos
Related Concept Videos
Heating and Cooling Curves
For instance, the addition of heat raises the temperature of a solid; the amount of heat absorbed depends on the heat capacity of the solid (q = mcsolidΔT). According to thermochemistry, the relation between the amount of heat absorbed or released by a substance, q, and its...
Thermal Insulation in Masonry Walls
External insulation can be applied using an Exterior Insulation and Finish System (EIFS), which involves affixing panels of plastic foam to the wall and covering them with a polymeric stucco reinforced with glass fiber mesh....
Insulation Coordination
Masonry Curtain Walls
Conduction, Convection and Radiation: Problem Solving
In order to solve a problem related to heat transfer, first of all, the situation needs to be examined to determine the type of heat transfer involved. This could...
Masonry in Cold and Hot Weather Conditions
Other key practices include keeping masonry units...


