建物外壁ソーラーパネルの利点を解明(Chinese Scientists Highlight Benefits of Building Facade Solar Panels)

2026-03-30 中国科学院(CAS)

中国科学院の研究チームは、建物外壁に太陽光パネルを設置する「ファサード一体型太陽光発電(FIPV)」の全球的効果をモデル化し、その有効性を示した。解析の結果、FIPVは年間約732.5TWhの発電が可能で、建物の電力需要を平均8.1%削減し、冷房需要の低減にも寄与することが明らかとなった。これにより都市のエネルギー消費削減と気候適応の両面で効果が期待され、累積CO2排出量は最大で377億トン削減可能と試算された。さらに、多くの地域で電力コスト削減も見込まれるが、導入には地域特性に応じた政策や計画が必要とされる。

<関連情報>

建物の外壁に設置された太陽光発電システムは、地球規模の気候変動への耐性を高める Building façade photovoltaics enhance global climate resilience

Hou Jiang  (姜侯),Ling Yao  (姚凌),Jun Qin  (秦军),Wenli Zhao  (赵文利),Tang Liu  (刘唐),Rui Zhu  (朱瑞),Fangyu Ding  (丁方宇),Jia Wang  (王佳),Xingxing Zhang  (张星星),Fan Zhang  (张帆),Ning Lu  (吕宁),Fenzhen Su  (苏奋振) & Chenghu Zhou  (周成虎)
Nature Climate Change  Published:27 March 2026
DOI:https://doi.org/10.1038/s41558-026-02606-z

建物外壁ソーラーパネルの利点を解明(Chinese Scientists Highlight Benefits of Building Facade Solar Panels)

Abstract

Climate change is intensifying global energy demands and amplifying exposure to extreme heat. Building façade-integrated photovoltaics (FIPV) present a largely untapped opportunity to supply renewable electricity while enhancing urban climate resilience. Here we show that deployable FIPV systems worldwide could generate 732.5 ± 4.5 TWh of electricity annually, based on a global synthesis of building datasets, climate projections and façade-scale simulations, with theoretical bounds of 8.9–7,671.3 TWh under conservative-to-optimistic assumptions. Although FIPV deployment costs exceed those of conventional photovoltaics, over 80% of urban districts exhibit lifetime expenditure savings due to combined electricity generation and cooling-load reductions. Under a gradual S-curve adoption reaching upper-bound potential by 2050, FIPV could deliver cumulative emission reductions of up to 37.7 GtCO2, corresponding to 0.0519 ± 0.0111 °C of avoided warming under currently announced national policies. These results identify FIPV as a complementary mitigation–adaptation strategy, highlighting the need for targeted policies to address regional and economic disparities in climate-resilient urban transition.

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