TY - JOUR
T1 - Solar thermal performance of two innovative configurations of air-vacuum layered triple glazed windows
AU - Fang, Yueping
AU - Memon, Saim
AU - Peng, Jingqing
AU - Tyrer, Mark
AU - Ming, Tingzhen
N1 - Funding Information:
This work funded by the Pump-Prime project of Coventry University and the self-initiated UK China industrial research collaboration is original research which is the further development of our previous research work, does not conflict with the interest of any third parties.
Funding Information:
This work was supported by the Pump-Prime project (Ref: 13455-28 ) of Coventry University and InnovateUK project-ICURe grant (Ref: 13-14/518470120 ) 2018.
Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2020/5/1
Y1 - 2020/5/1
N2 - This study reports the optimal solar thermal performance of two innovative configurations of air-vacuum layered triple glazed window or Integrated Vacuum Window (IVW). These are when the vacuum layer of IVW is facing the warm or indoor side, i.e. IVWwarm, and when the vacuum layer of IVW is facing the cold or outdoor side, i.e. IVWcold, positions at dynamic solar insolation under winter and summer EN-ISO standard ambient conditions. A theoretically and experimentally validated finite element model is employed. The results show that in winter conditions, although the U-value of IVWwarm of 0.33 Wm−2K−1 is lower than that of IVWcold of 0.49 Wm−2K−1, the IVWcold has a higher solar heat gain. In sunny winter conditions, IVWcold provides higher energy efficiency while in winter night, IVWwarm provides higher energy efficiency than IVWcold. The results show that in summer conditions the U-value of IVWwarm and IVWcold are 0.34 Wm−2K−1 and 0.51 Wm−2K−1 respectively, while IVWwarm provides lower cooling-load and higher energy-efficiency compared to IVWcold. It is concluded that setting the vacuum gap at the indoor side position provides lower cooling-load and higher energy-efficiency compared to setting the vacuum cavity at the outdoor side position in summer ambient conditions.
AB - This study reports the optimal solar thermal performance of two innovative configurations of air-vacuum layered triple glazed window or Integrated Vacuum Window (IVW). These are when the vacuum layer of IVW is facing the warm or indoor side, i.e. IVWwarm, and when the vacuum layer of IVW is facing the cold or outdoor side, i.e. IVWcold, positions at dynamic solar insolation under winter and summer EN-ISO standard ambient conditions. A theoretically and experimentally validated finite element model is employed. The results show that in winter conditions, although the U-value of IVWwarm of 0.33 Wm−2K−1 is lower than that of IVWcold of 0.49 Wm−2K−1, the IVWcold has a higher solar heat gain. In sunny winter conditions, IVWcold provides higher energy efficiency while in winter night, IVWwarm provides higher energy efficiency than IVWcold. The results show that in summer conditions the U-value of IVWwarm and IVWcold are 0.34 Wm−2K−1 and 0.51 Wm−2K−1 respectively, while IVWwarm provides lower cooling-load and higher energy-efficiency compared to IVWcold. It is concluded that setting the vacuum gap at the indoor side position provides lower cooling-load and higher energy-efficiency compared to setting the vacuum cavity at the outdoor side position in summer ambient conditions.
KW - Low emittance coatings
KW - Solar insolation
KW - Thermal performance
KW - Vacuum
KW - Window
UR - http://www.scopus.com/inward/record.url?scp=85077329579&partnerID=8YFLogxK
U2 - 10.1016/j.renene.2019.12.115
DO - 10.1016/j.renene.2019.12.115
M3 - Article
AN - SCOPUS:85077329579
VL - 150
SP - 167
EP - 175
JO - Solar and Wind Technology
JF - Solar and Wind Technology
SN - 0960-1481
ER -
