Optimization of the thermochromic glazing design for curtain wall buildings based on experimental measurements and dynamic simulation

Energy Performance of Buildings with Thermochromic Windows in Mediterranean Climates

“…Among insular cities, it can be seen that Heraklion has the coldest winter season with the minimum temperature of −15.9 • C. This leads to an annual energy demand of 132.05 kWh/m 2 , while the average annual energy demand of the locations under study was 130 kWh/m 2 . Optimized thermochromic coatings applied in other Mediterranean cities yielded annual demand between 60 and 80 kWh/m 2 for south-and north-facing walls, respectively [29]. This difference in energy indicates (a) the requirement for optimization with regard to the orientation of the windows, becoming important when cost is introduced in the model, and (b) the requirement for thermochromic coatings with higher solar selectivity properties compared to the coatings utilized in this study.…”

Environmental Benefits of Thermochromic VO2Windows: Life Cycle Assessment from Laboratory Scale to Industrial Scale

“…[10] In order to fit with the smart window application, W-doped VO 2 is considered rather than VO 2 to lower the transition temperature because a transition temperature around 25 C was found to be the most efficient for building energy efficiency. [12,30] The process consists in a hydrothermal synthesis using vanadium pentoxide (V Europe without Switzerland.…”

“…[ 10 ] In order to fit with the smart window application, W‐doped VO 2 is considered rather than VO 2 to lower the transition temperature because a transition temperature around 25 °C was found to be the most efficient for building energy efficiency. [ 12,30 ] The process consists in a hydrothermal synthesis using vanadium pentoxide (V 2 O 5 ), oxalic acid (H 2 C 2 O 4 ), and ammonium tungstate ((NH 4 ) 10 [W 12 O 41 ]·5H 2 O) as precursors. [ 10 ] The first two precursors are not available in the ecoinvent database either.…”

“…[ 9 ] Moreover, the optical properties modulation is primarily in the infrared region and the transition temperature can be lowered down to 25 °C or even lower temperatures. [ 2,10 ] These features have been numerically [ 11,12 ] and experimentally [ 13,14 ] implemented in model buildings to demonstrate the energy efficiency potential gain. It has been shown to be particularly interesting for windows because the VO 2 can provide a constant transmittance in the visible region while the infrared radiation is modulated, and thus the visible light transmittance is maintained.…”

Fachadas vidriadas: cálculo de transmitancia térmica

“…A nivel internacional, se ha buscado mejorar el desempeño energético de los sistemas de fachadas integrales mediante el uso de materiales aislantes, entre ellos, ruptura de puente térmico, triple vidriado hermético, vidriado termocrómico (Arnesano et al, 2021), poliéster reforzado con fibra de vidrio (Cordero, 2015), o bien, a través del uso de una doble envolvente, donde la fachada acristalada disimula otra piel de baja transmitancia térmica (Bronwyn, 2018) o permite constituir una cámara ventilada (Saroglou, Meir y Theodosiou, 2020). La principal innovación en los sistemas de fachadas integrales es la integración de nódulos fotovoltaicos semitransparentes en las partes de la fachada que reciben más radiación solar (Mocerino, 2020;Wu y Flemmer, 2020).…”