迈向青藏高原零碳医疗建筑：建筑与光伏系统协同优化方法

Abstract The extremely harsh climatic conditions in the Qinghai-Tibet Plateau region necessitate urgent enhancements of the health care infrastructure to safeguard population health outcomes. Given the scarcity of conventional energy and the high energy consumption of medical buildings, solar-driven solutions are essential for achieving zero-carbon emissions in the region. An optimization method synergistically integrating architectural–photovoltaic system design was developed to fully utilize solar energy and rapidly determine zero-carbon design strategies. Under this framework, a multi-objective model incorporating life-cycle carbon emissions , investment payback periods, and useful daylight illuminance was developed. The reliability of the method was verified by comparing computational accuracy and time required for obtaining optimal design solutions, with validation conducted through a hospital project in Lhasa. The synergistic optimization method limits the investment increase to under 20% while reducing life-cycle carbon emissions by 12.2% and increasing useful daylight illuminance by 4.6%. Furthermore, the proposed method can save at least 21.7% of the runtime compared with the sequential optimization method. These findings demonstrate that prioritizing morphological strategies alongside full rooftop photovoltaic integration can facilitate zero-carbon medical buildings in the Qinghai-Tibet Plateau, addressing both energy security and health care equity challenges.