Optimal PV cell coverage ratio for semi-transparent photovoltaics on office building façades in central China
Optimal PV cell coverage ratio for semi-transparent photovoltaics on office building façades in central China
复制标题
华中地区办公楼外墙半透明光伏电池最佳覆盖率
DOI：
10.1016/j.enbuild.2014.03.052
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发表时间：
2014
影响因子：
6.7
通讯作者：
Xu S
中科院分区：
文献类型：
--
作者：
Xu S
本研究通过室内深度、窗墙比（WWR）和朝向等建筑变量的不同组合，研究了中国中部采用半透明光伏幕墙的办公大楼的最佳光伏电池覆盖比的总能耗。本文建立了计算单层半透明光伏幕墙光伏电池覆盖率的模型和方法，并通过现场试验对模型和方法进行了验证。然后将已建立的技术纳入Energy Plus，对不同光伏电池覆盖率对总体能耗的影响进行参数分析。结果表明，光伏电池覆盖率对电耗有显著影响，其影响受房间深度、水比和朝向的不同组合的影响。此外，选择最佳光伏电池覆盖率被认为是建筑集成光伏（BIPV）系统设计方法的一个重要因素：与最不利的光伏电池覆盖率相比，使用最佳光伏电池覆盖率可以实现总体能耗节约13%（平均）。
The present study investigates the optimal PV cell coverage ratio in terms of the overall energy consumption of office buildings in central China for which semi-transparent photovoltaic façades have been implemented, with various combinations of architectural variables including room depth, window-to-wall ratio (WWR), and orientation. Here, models and methods are established for the calculation of PV cell coverage ratio for a single-glazed semi-transparent PV façade and these models and methods are validated through field experiments. The established techniques are then incorporated into Energy Plus to perform a parametric analysis of the effects of different PV cell coverage ratios on overall energy consumption. The results show that PV cell coverage ratio has a pronounced effect on electricity consumption and that its impact is influenced by different combinations of room depth, WWR, and orientation. Moreover, the selection of an optimal PV cell coverage ratio is found to be an important element of the design approach in building-integrated PV (BIPV) systems: use of the optimal PV cell coverage ratio can achieve overall energy consumption savings of 13% (on average) compared to the least favourable PV cell coverage ratio.