Analysis on influencing factors and energy saving potential of photovoltaic curtain wall preheating fresh air system in severe cold areaXue Lv, Kailiang Huang, Guohui Feng, Jintian Xu and Dongxu ZhangsE3S Web Conf., 356 (2022) 01035DOI: https://doi.org/10.1051/e3sconf/202235601035