Performance of PV-Trombe wall in winter correlated with south façade design
Performance of PV-Trombe wall in winter correlated with south façade design
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DOI：
10.1016/j.apenergy.2010.06.002
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发表时间：
2011
期刊：
影响因子：
11.2
通讯作者：
Wei Sun;J. Ji;C. Luo;Wei He
中科院分区：
文献类型：
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作者：
Wei Sun;J. Ji;C. Luo;Wei He
PV-Trombe墙（PVTW）是Trombe墙的一种新形式。PVTW玻璃上的光伏电池可以将太阳辐射同时转化为电能和热能。南立面的窗户也可以在冬季将太阳能热量引入房间。通过实验研究了一栋带朝南窗和PVTW的建筑物的温度场。建立了一个动态数值模型，用于模拟整个建筑系统。室内空气的温度被发现是垂直分层从测量。采用节点模型计算了房间内的温度分布。模拟结果与实验数据吻合较好。数值模拟结果表明，不同的南立面设计对PVTW的热效率有显著影响。在南窗的情况下，PVTW的热效率相对降低27%。玻璃上PV覆盖率的增加可使TW的热效率降低高达17%。考虑到电转换，当玻璃被光伏电池完全覆盖时，太阳能利用的总效率最多降低5%。PVTW的电力转换效率达到11.6%，并受到南立面设计的轻微影响。
PV-Trombe wall (PVTW) is a novel version of Trombe-wall. Photovoltaic cells on the cover glazing of the PVTW can convert solar radiation into electricity and heat simultaneously. A window on the south façade can also introduce solar heat into the room in the winter season. Experiment has been conducted to study the temperature field of a building with both southern facing window and the PVTW. A dynamic numerical model is developed for the simulation of the whole building system. The temperature of the indoor air is found to be vertically stratified from the measurement. The nodal model is adopted to calculate the temperature profile in the room. The simulation results are in good agreement with the experimental data. The different south façade designs affect the thermal efficiency of the PVTW significantly from the numerical simulation. With a southern facing window, the thermal efficiency of the PVTW is reduced by 27% relatively. The increase of PV coverage on the glazing can reduce the thermal efficiency of the TW by up to 17%. By taking account of electric conversion, the total efficiency of solar utilization is reduced by 5% at most while the glazing is fully covered with PV cells. The electric conversion efficiency of the PVTW achieves 11.6%, and is slightly affected by south façade designs.