Research on low-carbon energy-saving technical solutions for office buildings in Chengdu, China

Le résumé fourni par la source

To address thermal envelope deficiencies and suboptimal energy performance in existing office buildings in Chengdu, a representative city in China's hot-summer and cold-winter climate zone, this study proposes an integrated low-carbon energy-efficient retrofitting system. A rooftop solar photovoltaic system with a capacity of 193.2 kW generates an annual electricity output of 152,000 to 185,000 kWh, meeting the majority of the building's lighting demands and achieving a static payback period of 6.95 to 8.47 years. Passive techniques, including optimised envelope design, natural ventilation, and shading systems, contribute to a 36.5% reduction in the building's total energy load. A humidity-responsive flexible control strategy further reduces peak energy consumption by 62.29% in summer and 42.12% in winter. Following optimisation, the annual energy consumption per unit area decreases by 44.1%, electricity use for heating, ventilation, and air conditioning is reduced by 60%, and operational carbon emissions per unit area drop by 60.5%, equivalent to an annual total reduction of 260.2 tons. Among this reduction, 65.1% is attributed to improved system efficiency, while 34.8% stems from the substitution of grid electricity with solar photovoltaic power. This study provides a scalable and climate-adaptive solution for low-carbon retrofitting of office buildings in humid, low-solar-radiation regions.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.