Building integrated photovoltaic(BIPV)windows impact building performance by balancing daylighting availability,visual comfort,solar power generation,and building energy consumption.Optimizing this balance is crucial ...Building integrated photovoltaic(BIPV)windows impact building performance by balancing daylighting availability,visual comfort,solar power generation,and building energy consumption.Optimizing this balance is crucial for improving overall building energy efficiency and indoor environment quality.This study introduces a novel curved photovoltaic window design aimed at increasing daylight transmittance while maintaining the same photovoltaic area as a flat PV window.The annual daylighting availability,visual comfort and building energy performance of three types of flat/curved PV windows(180°,120°,0°-flat)in a reference office room was comparatively studied across five different climate zones in China(Xiamen,Harbin,Nanjing,Kunming,and Beijing).The PV model was validated by the experimental data.The results showed that the room with curved PV windows had significantly higher daylighting availability compared to flat windows,with the growth rates of the spatial useful daylight illuminance ranging of 3.94%–4.78%and 5.56%–5.94%,respectively,for the curved PV windows at central angles of 120°and 180°across different climate zones.The 120°curved PV windows achieved the lowest net energy used intensity(Net_EUI),suggesting the advantages of curved PV windows and proposed the existence of an optimal curvature for achieving the lowest Net_EUI.展开更多
In the search for façade solutions that meet requirements for energy efficiency and office space use comfort,it seems promising to apply a combination of photovoltaic(PV)technology with switchable glazing.It is b...In the search for façade solutions that meet requirements for energy efficiency and office space use comfort,it seems promising to apply a combination of photovoltaic(PV)technology with switchable glazing.It is believed that the merging of these two technologies might benefit the cooperation between regulated solar protection and energy efficiency.This article provides a design outlook on the use of PV-EC,PV-SPD,and PV-LCD technologies in terms of their utility for office buildings in moderate climates.This study concerns thermal,optical-visual,energetic,and technical issues,and a comparative method was applied.Based on current scientific research,the results of the analysis were juxtaposed with the requirements of the office working environment:natural lighting,thermal protection,glare protection,privacy control,energy efficiency,and technical reliability.The juxtaposition of these aspects revealed the advantages and disadvantages of a given solution from an architectural point of view.PV-EC technology in a side-by-side system was found to be the most appropriate solution and the results may be applied to make preliminary design decisions.展开更多
基金supported by the National Natural Science Foundation of China(No.52108098,No.52078443 and No.52308120)the Fundamental Research Funds for the Central Universities(No.20720220115 and No.20720240072)XMU Training Program of Innovation and Entrepreneurship for Undergraduates(No.S202410384553).
文摘Building integrated photovoltaic(BIPV)windows impact building performance by balancing daylighting availability,visual comfort,solar power generation,and building energy consumption.Optimizing this balance is crucial for improving overall building energy efficiency and indoor environment quality.This study introduces a novel curved photovoltaic window design aimed at increasing daylight transmittance while maintaining the same photovoltaic area as a flat PV window.The annual daylighting availability,visual comfort and building energy performance of three types of flat/curved PV windows(180°,120°,0°-flat)in a reference office room was comparatively studied across five different climate zones in China(Xiamen,Harbin,Nanjing,Kunming,and Beijing).The PV model was validated by the experimental data.The results showed that the room with curved PV windows had significantly higher daylighting availability compared to flat windows,with the growth rates of the spatial useful daylight illuminance ranging of 3.94%–4.78%and 5.56%–5.94%,respectively,for the curved PV windows at central angles of 120°and 180°across different climate zones.The 120°curved PV windows achieved the lowest net energy used intensity(Net_EUI),suggesting the advantages of curved PV windows and proposed the existence of an optimal curvature for achieving the lowest Net_EUI.
文摘In the search for façade solutions that meet requirements for energy efficiency and office space use comfort,it seems promising to apply a combination of photovoltaic(PV)technology with switchable glazing.It is believed that the merging of these two technologies might benefit the cooperation between regulated solar protection and energy efficiency.This article provides a design outlook on the use of PV-EC,PV-SPD,and PV-LCD technologies in terms of their utility for office buildings in moderate climates.This study concerns thermal,optical-visual,energetic,and technical issues,and a comparative method was applied.Based on current scientific research,the results of the analysis were juxtaposed with the requirements of the office working environment:natural lighting,thermal protection,glare protection,privacy control,energy efficiency,and technical reliability.The juxtaposition of these aspects revealed the advantages and disadvantages of a given solution from an architectural point of view.PV-EC technology in a side-by-side system was found to be the most appropriate solution and the results may be applied to make preliminary design decisions.
