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首页> 外文期刊>Energy and Buildings >Electricity production and cooling energy savings from installation of a building-integrated photovoltaic roof on an office building
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Electricity production and cooling energy savings from installation of a building-integrated photovoltaic roof on an office building

机译：通过在办公大楼中安装建筑物集成的光伏屋顶来节省电力生产和冷却能源

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摘要

Reflective roofs can reduce demand for air conditioning and warming of the atmosphere. Roofs can also host photovoltaic (PV) modules that convert sunlight to electricity. In this study we assess the effects of installing a building integrated photovoltaic (BIPV) roof on an office building in Yuma, AZ. The system consists of thin film PV laminated to a white membrane, which lies above a layer of insulation. The solar absorptance of the roof decreased to 0.38 from 0.75 after installation of the BIPV, lowering summertime daily mean roof upper surface temperatures by about 5 ℃. Summertime daily heat influx through the roof deck fell to ±0.1 kWh/m~2 from 0.3-1.0 kWh/m~2. However, summertime daily heat flux from the ventilated attic into the conditioned space was minimally affected by the BIPV, suggesting that the roof was decoupled from the conditioned space. Daily PV energy production was about 25% of building electrical energy use in the summer. For this building the primary benefit of the BIPV appeared to be its capacity to generate electricity and not its ability to reduce heat flows into the building. Building energy simulations were used to estimate the cooling energy savings and heating energy penalties for more typical buildings.
机译：反光的屋顶可以减少对空调和气候变暖的需求。屋顶还可以容纳将阳光转化为电能的光伏（PV）模块。在这项研究中，我们评估了在亚利桑那州尤马市的一栋办公楼上安装建筑物集成光伏（BIPV）屋顶的效果。该系统由层压到白色膜上的薄膜PV组成，该膜位于绝缘层上方。安装BIPV后，屋顶的日光吸收率从0.75降低到0.38，使夏季每天的平均屋顶上表面温度降低约5℃。夏季每天通过屋顶平台的热量流入量从0.3-1.0 kWh / m〜2降至±0.1 kWh / m〜2。但是，夏季从通风阁楼进入空调空间的每日热通量受BIPV的影响最小，这表明屋顶与空调空间是分离的。夏季，每天的光伏能源产量约占建筑电能消耗的25％。对于该建筑物，BIPV的主要好处似乎是其发电能力，而不是减少流入建筑物的热量的能力。建筑能耗模拟用于估算更典型建筑的冷却能耗节省和热能损失。

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  • 来源
    《Energy and Buildings》 |2013年第1期|210-220|共11页
  • 作者

    George Ban-Weiss; Craig Wray; Woody Delp; Peter Ly; Hashem Akbari; Ronnen Levinson;

  • 作者单位

    Lawrence Berkeley National Laboratory, Environmental Energy Technologies Division, 1 Cyclotron Road, Berkeley, CA 94720, USA;

    Lawrence Berkeley National Laboratory, Environmental Energy Technologies Division, 1 Cyclotron Road, Berkeley, CA 94720, USA;

    Lawrence Berkeley National Laboratory, Environmental Energy Technologies Division, 1 Cyclotron Road, Berkeley, CA 94720, USA;

    United States Navy, Naval Facilities Engineering & Expeditionary Center, Port Hueneme, CA 93043, USA;

    Department of Building, Civil, and Environmental Engineering, Concordia University, Montreal, Quebec, Canada;

    Lawrence Berkeley National Laboratory, Environmental Energy Technologies Division, 1 Cyclotron Road, Berkeley, CA 94720, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photovoltaic; building integrated photovoltaic (BIPV); building energy; white roof; reflective roof; building heat transfer;

    机译：光伏建筑集成光伏（BIPV）;建筑能源;白色屋顶反光屋顶建筑传热;

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