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于水, 徐一嘉, 孙圣坤, 等. 严寒地区BIPV/T墙体热湿传递特性研究[J]. 太阳能学报, 2025,46(9):501-509.
于水, 徐一嘉, 孙圣坤, 等. 严寒地区BIPV/T墙体热湿传递特性研究[J]. 太阳能学报, 2025,46(9):501-509. DOI: doi:10.19912/j.0254-0096.tynxb.2024-0768.
由于建筑光伏光热一体化系统(BIPV/T)墙体在结构上与普通墙体差别较大
会导致其保温隔湿性能发生改变
该研究以严寒地区沈阳为例
建立热湿耦合的BIPV/T墙体二维数值模型
研究冬季工况下BIPV/T墙体内部热湿传递情况
并通过实验验证了该方法的有效性。将BIPV/T墙体与普通外保温墙体研究结果进行对比
结果表明:BIPV/T墙体的时间滞后因子τ=4~5 h和衰减因子f =0.064
相对于普通墙体的τ=2~4 h和f =0.151
BIPV/T墙体热工性能较好
可显著提升室内环境的热舒适性;BIPV/T墙体的内部含水量比普通墙体降低6%
并能加速墙体内含水量下降
使BIPV/T墙体内含水量维持在较低状态;BIPV/T墙体产生冻融损伤的概率比普通墙体降低61.56%
提升了建筑围护结构的耐久性;且BIPV/T墙体的空气通道可起到为光伏组件降温作用
其光电转化效率始终维持在18%以上。
As building integrated photovoltaic/thermal(BIPV/T)walls are structurally different from ordinary walls
which leads to changes in their thermal and moisture insulation performance
this study takes Shenyang
a cold region
as a case study. A two-dimensional numerical model of coupled heat and moisture transfer was established to study the internal transfer processes inside the BIPV/T walls under the winter conditions
and to experimentally validate the validity of the method. Comparing the BIPV/T wall with a conventional externally insulated wall
the results show that the time lag factor (τ=4-5 h) and attenuation factor (=0.064) of the BIPV/T wall are superior to those of the ordinary wall (τ=2-4 h
=0.151)
indicating better thermal performance. It can significantly improve the thermal comfort of the indoor environment. The internal water content of BIPV/T wall is 6% lower than that of ordinary wall
and it can accelerate the decrease of water content in the wall
keeping the moisture content within BIPV/T walls low. The probability of producing freeze-thaw damage in BIPV/T walls is 61.56% lower than that of ordinary walls
which improves the durability of the building envelope. The air channels of the BIPV/T wall can play a role in cooling down the PV modules
whose photovoltaic conversion efficiency is consistently above 18%.
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