A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Thermoelectric analysis of different vacuum-based photovoltaic semitransparent skylights
Highlights Three designs of photovoltaic-based skylights are proposed to save energy in buildings. The integration of vacuum glazing with photovoltaic skylights is evaluated. Using a vacuum layer at the backside of the PV layer is favorable for thermal insulation. Using a vacuum-based PV skylight reduces the total U-value from 6.3 to 1.9 W/m2.K at ASTM. Using the vacuum layer with the PV-skylight slightly decreases the power generation of the PV.
Abstract In commercial buildings with large glazing facades, transparent facades and skylights play a considerable impact on energy consumption. In this study, three different photovoltaic (PV) -based skylights are compared to save energy in these buildings. The first skylight uses a vacuum glazing sample as a substrate at the backside of the PV layers. The second design integrates a vacuum glazing layer in front of the PV layers. And lastly, the PV layers are attached to a single layer of glazing with a solar cells covers 25% of the whole area. A 3D thermal model is developed and validated with data from the literature to compare these designs. it is concluded that using a vacuum layer at the backside of the PV layer is favorable for thermal insulation and attains relatively similar power generation to the case without a vacuum layer. In more detail, replacing the single glazing PV skylight with the first skylight design reduces the total U-value of the glazing from 6.3 to 1.9 W/m2.K for a glazing sample with an area of 0.4 m by 0.4 m at ASTM boundary conditions. Furthermore, at received solar irradiance of 1000 W/m2, an ambient temperature of 25 °C, and a wind speed of 1 m/s, replacing the third skylight design with the first skylight design slightly reduced the electricity generation from 37.4 W/m2 to 36.4 W/m2, significantly decreased the heat flux transfer from 91.1 W/m2 to 50.5 W/m2 and lowers the indoor surface temperature from 32.1 °C to 27.1 °C.
Thermoelectric analysis of different vacuum-based photovoltaic semitransparent skylights
Highlights Three designs of photovoltaic-based skylights are proposed to save energy in buildings. The integration of vacuum glazing with photovoltaic skylights is evaluated. Using a vacuum layer at the backside of the PV layer is favorable for thermal insulation. Using a vacuum-based PV skylight reduces the total U-value from 6.3 to 1.9 W/m2.K at ASTM. Using the vacuum layer with the PV-skylight slightly decreases the power generation of the PV.
Abstract In commercial buildings with large glazing facades, transparent facades and skylights play a considerable impact on energy consumption. In this study, three different photovoltaic (PV) -based skylights are compared to save energy in these buildings. The first skylight uses a vacuum glazing sample as a substrate at the backside of the PV layers. The second design integrates a vacuum glazing layer in front of the PV layers. And lastly, the PV layers are attached to a single layer of glazing with a solar cells covers 25% of the whole area. A 3D thermal model is developed and validated with data from the literature to compare these designs. it is concluded that using a vacuum layer at the backside of the PV layer is favorable for thermal insulation and attains relatively similar power generation to the case without a vacuum layer. In more detail, replacing the single glazing PV skylight with the first skylight design reduces the total U-value of the glazing from 6.3 to 1.9 W/m2.K for a glazing sample with an area of 0.4 m by 0.4 m at ASTM boundary conditions. Furthermore, at received solar irradiance of 1000 W/m2, an ambient temperature of 25 °C, and a wind speed of 1 m/s, replacing the third skylight design with the first skylight design slightly reduced the electricity generation from 37.4 W/m2 to 36.4 W/m2, significantly decreased the heat flux transfer from 91.1 W/m2 to 50.5 W/m2 and lowers the indoor surface temperature from 32.1 °C to 27.1 °C.
Thermoelectric analysis of different vacuum-based photovoltaic semitransparent skylights
Radwan, Ali (author) / Olabi, Abdul Ghani (author) / Abo-Khalil, Ahmed G. (author) / Yousef, Bashria A.A. (author) / Serageldin, Ahmed A. (author) / Maghrabie, Hussein M (author) / Abdelkareem, Mohammad Ali (author)
Energy and Buildings ; 285
2023-02-17
Article (Journal)
Electronic Resource
English
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