Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Impact of BIPV windows on building energy consumption in street canyons: Model development and validation
Highlights A new parameterization scheme for BIPV window is developed and validated. The effect of BIPV window in different street canyons is quantified. Cooling effect of BIPV window on canyon air is not sensitive to canyon geometry. Energy saving by BIPV window increases in north–south orientated open canyons.
Abstract Photovoltaic components have been increasingly integrated into the façades of buildings as a means to enhance their energy efficiency in recent years, yet the impact of using building-integrated photovoltaic (BIPV) windows in street canyons has been rarely studied due to the lack of modelling tools. In this study, we developed a new parametrization scheme for BIPV windows, and incorporated it into building energy simulations coupled with a single-layer urban canopy model. Evaluation against in-situ measurements and EnergyPlus simulation suggests that the coupled model is able to reasonably capture the diurnal profiles of BIPV window temperature, building cooling load, and outdoor microclimate. A set of simulations were conducted to examine the impact of BIPV windows on summertime building energy consumption and outdoor air temperature in different street canyons. Compared to clear glass windows, BIPV windows can reduce canyon air temperature and building cooling load. Temperature reduction is found to increase with window coverage but does not change significantly with canyon geometry. Savings on cooling energy consumption vary between 9.16% and 63.71% for the studied neighbourhood in Phoenix, US, but tend to be higher for open street canyons with north–south orientation and large window-to-wall ratios. The coupled model takes into account the dynamic interactions between building energy consumption and the outdoor microclimate, thus providing insight into the benefit of using BIPV windows at the neighbourhood scale.
Impact of BIPV windows on building energy consumption in street canyons: Model development and validation
Highlights A new parameterization scheme for BIPV window is developed and validated. The effect of BIPV window in different street canyons is quantified. Cooling effect of BIPV window on canyon air is not sensitive to canyon geometry. Energy saving by BIPV window increases in north–south orientated open canyons.
Abstract Photovoltaic components have been increasingly integrated into the façades of buildings as a means to enhance their energy efficiency in recent years, yet the impact of using building-integrated photovoltaic (BIPV) windows in street canyons has been rarely studied due to the lack of modelling tools. In this study, we developed a new parametrization scheme for BIPV windows, and incorporated it into building energy simulations coupled with a single-layer urban canopy model. Evaluation against in-situ measurements and EnergyPlus simulation suggests that the coupled model is able to reasonably capture the diurnal profiles of BIPV window temperature, building cooling load, and outdoor microclimate. A set of simulations were conducted to examine the impact of BIPV windows on summertime building energy consumption and outdoor air temperature in different street canyons. Compared to clear glass windows, BIPV windows can reduce canyon air temperature and building cooling load. Temperature reduction is found to increase with window coverage but does not change significantly with canyon geometry. Savings on cooling energy consumption vary between 9.16% and 63.71% for the studied neighbourhood in Phoenix, US, but tend to be higher for open street canyons with north–south orientation and large window-to-wall ratios. The coupled model takes into account the dynamic interactions between building energy consumption and the outdoor microclimate, thus providing insight into the benefit of using BIPV windows at the neighbourhood scale.
Impact of BIPV windows on building energy consumption in street canyons: Model development and validation
Chen, Liutao (Autor:in) / Zheng, Xing (Autor:in) / Yang, Jiachuan (Autor:in) / Yoon, Jong Ho (Autor:in)
Energy and Buildings ; 249
20.06.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Building energy consumption , BIPV window , Urban canopy model , Urban heat island , A/C , Air conditioning system , BEM , Building energy model , BEM-UCM , Building energy model coupled with an urban canopy model , BIPV , Building-integrated photovoltaic , SLUCM , Single-layer urban canopy model , PV , Photovoltaic , WRF , Weather Research and Forecasting model , WWR , Window-to-wall ratio
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