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Optical selective coating for solar absorbers

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Energy-efficient windows are being used to increase the thermal insulation of a fa & ccedil;ade. Such insulating windows contain an ultra-thin, multilayered, transparent silver coating that acts as an infrared mirror which significantly reduces thermal los ...

2024

Solar radiation reaching the surface of the earth for a period of one hour contains more energy than that consumed by mankind over an entire year. Some of this solar energy is already collected by photovoltaic cells to cover the electricity needs of buildi ...

EPFL2023

Facades are the primary interface controlling the flow of solar energy in buildings and affecting their energy balance and environmental impact. Recently, large-scale 3D printing (3DP) of translucent polymers has been explored as a technique for fabricatin ...

WILEY2023

Transparent nanomeshes for smart windows

Andreas Schueler, Jérémy Jacques Antonin Fleury

Conventional selective low-e coatings for windows of residential buildings have a cut-off frequency in the near infrared spectral region NIR, limiting the resulting solar heat gain coefficient to g ≈ 0.5. By structuring the coating into nanomeshes, the sel ...

Swiss Federal Office of Energy SFOE2021

Thermochromic solar absorber coatings with elevated transition temperature

Anna Krammer

Due to their simple design and operation, solar thermal collectors for domestic hot water gener-ation and space heating are one of the most common solar energy harvesting systems in use today. Dur-ing cold periods all the absorbed energy is useful. During ...

EPFL2020

With the advent of a new generation of switchable absorber coatings, overheating and the resulting stagnation of solar thermal collectors – until recently a common problem even in central European latitudes – can be successfully overcome. Based on thermoch ...

EPFL LESO-PB2020

Eco-Sim: A Parametric Tool to Evaluate the Environmental and Economic Feasibility of Decentralized Energy Systems

Jean-Louis Scartezzini, Dasaraden Mauree, Amarasinghage Tharindu Dasun Perera, Karni Siraganyan

Due to climate change and the need to decrease the carbon footprint of urban areas, there is an increasing pressure to integrate renewable energy and other components in urban energy systems. Most of the models or available tools do not provide both an eco ...

2019

Thermochromic coatings for overheating protection of solar thermal collectors - Towards industrial implementation - Annual Report 2019

Andreas Schueler, Anna Krammer

2019

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A new generation of solar collectors is based on thermochromic thin film technology, where the remarkable optical changes of vanadium dioxide, through its reversible semiconductor-to-metal phase transition, are exploited. This study reports on the infrared ...

ISES2018

Thermochromic coatings for overheating protection of solar thermal collectors - novel type of doping (TARGET95)

Andreas Schueler, Anna Krammer

Overheating and the resulting stagnation of solar thermal collectors is a common problem even in central European latitudes. During stagnation, high temperatures lead to water evaporation, glycol degradation and stresses in the collector with increasing va ...

2018