Novel thermochromic intelligent window with adjustable emissivity

Abstract

The invention discloses a novel thermochromic intelligent window with adjustable emissivity. The novel thermochromic intelligent window with adjustable emissivity comprises a window frame, wherein a glass assembly is arranged in the window frame, and comprises a glass substrate; a metallic oxide coating for adjusting the glass substrate to have a low radiation function at an intermediate infraredarea is deposited on one side of the glass substrate, and is a layer of transparent indium tin oxide film; a solar energy adjustment high-radiation part is arranged on the other side of the glass substrate, and comprises a first polyethylene layer; and a hydroxy propyl cellulose hydrogel layer is arranged on the upper part of the first polyethylene layer, is further provided with a second polyethylene layer, and is wrapped in the middle by the first polyethylene layer and the second polyethylene layer. According to the novel thermochromic intelligent window with adjustable emissivity providedby the invention, different-waveband heat radiation and solar transmissivity can be dynamically adjusted according to the season and weather changes, so that the indoor temperature is reduced, the energy consumption is saved, and the cooling load of a building in summer and the heat loss in winter are reduced.

Description

technical field [0001] The invention relates to the technical field of heat energy recovery and utilization, in particular to a novel thermochromic smart window with adjustable emissivity. Background technique [0002] The signing of the "Paris Agreement" in 2018 emphasized the importance of setting the global warming limit at 1.5°C to reduce carbon dioxide emissions and save energy, and called on the global community to reduce carbon emissions. Since building energy consumption accounts for 40% of global energy consumption, and heating, ventilation and air conditioning application energy consumption accounts for half of building energy consumption, improving the energy efficiency of air conditioning applications has become a key task to improve building sustainability. [0003] Windows are considered the least energy efficient part of a building compared to other building components. Direct sunlight from windows is the main factor leading to higher room temperature in summ...

AI Technical Summary

Problems solved by technology

However, the properties of radiative cooling materials limit their application as smart windows

First, most radiative cooling materials have low light transmittance, while high light transmittance is critical for window applications

Secondly, the mid-infrared emissivity of most radiative cooling materials cannot be changed, and the radiative cooling effect increases the heating energy consumption in winter, which not only offsets the heating energy consumption saved in summer, but also leads to an increase in annual energy consumption

Therefore, radiative cooling materials are not advisable in winter, and its application in dynamic environments with seasonal changes is also limited.

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