Application of semitransparent photovoltaics in transportation infrastructure for energy savings and solar electricity production: Toward novel net‐zero energy tunnel design,Progress in Photovoltaics

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Application of semitransparent photovoltaics in transportation infrastructure for energy savings and solar electricity production: Toward novel net‐zero energy tunnel design
Progress in Photovoltaics ( IF 8.0 ) Pub Date : 2019-08-19 , DOI: 10.1002/pip.3182
David Sun ₁ , Andreas Athienitis ₁ , Katherine D'Avignon ₂

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Lighting subsystems account for up to 50% of the energy consumption of a typical tunnel. Day‐time lighting levels account for over two‐thirds of the total system lighting power; their periodic nature creates daily peaks in the tunnel's energy load profile. This paper studies the integration of semitransparent photovoltaic (STPV) cells into sunscreen structures installed above tunnel entrances to reduce tunnel lighting requirements and offset their day‐time lighting loads using energy generated from PVs. The electrical lighting load of a typical 1‐km length road tunnel with and without STPV sunscreen structures was modeled to establish the potential for energy savings. Using a daylighting and energy modeling plug‐in called DIVA, the transparencies and ratios of photovoltaics (PV) to glass of a STPV sunscreen that are in accordance with the luminance reduction code requirements were determined. Reduced lighting requirements over the whole tunnel length, including the threshold, transition, and interior lighting zones of the tunnel were considered, resulting in significant energy savings. The annual power production of the sections covered with STPV was then simulated using the PVsyst software. The integration of PV cells resulted in an annual energy production that reduced annual net‐energy use by up to 7% and with the potential to reduce electric lighting loads by up to 60% during the day‐time. Results also demonstrated that STPV sunscreens have the potential to meet luminance requirements if supplemented with an intelligent lighting control system.

中文翻译：

半透明光伏电池在交通基础设施中的节能和太阳能生产应用：朝着新型的净零能耗隧道设计迈进

照明子系统占典型隧道能耗的50％。白天的照明水平占系统总照明功率的三分之二以上；它们的周期性会在隧道的能量负荷曲线中产生每日峰值。本文研究将半透明光伏（STPV）电池集成到安装在隧道入口上方的防晒结构中，以减少隧道照明需求并利用PV产生的能量抵消其白天的照明负荷。对具有和不具有STPV防晒霜结构的典型1公里长的公路隧道的电气照明负荷进行建模，以建立节能的潜力。使用称为DIVA的采光和能量建模插件，确定了符合减光规范要求的STPV防晒霜的光伏（PV）与玻璃的透明度和比率。考虑到在隧道的整个长度上减少了照明要求，包括隧道的门槛，过渡和内部照明区域，从而大大节省了能源。然后使用PVsyst软件模拟了STPV覆盖的区域的年发电量。光伏电池的集成导致了每年的能源生产，从而使年度净能源使用量减少了7％，并且有可能在白天将电气照明负荷减少多达60％。结果还表明，如果添加智能照明控制系统，则STPV防晒霜有可能满足亮度要求。

更新日期：2019-08-19

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