摘要
面向“双碳”目标,夏热冬暖地区既有建筑因大面积单片透明玻璃,导致制冷能耗与碳排放居高不下,亟需低成本、快施工的“轻改造”技术。本文以广州一科研楼30 m^(2)西南向实验办公房间为研究对象,选用某磁控溅射金属膜,通过实测、建筑能耗模拟软件EnergyPlus模拟及碳排放因子法,评估其节能降碳效果。结果显示:贴膜后实测空调节能率30.2%,EnergyPlus模拟节能率29.9%,二者偏差小于5%,结果高度一致。全阴天0.75 m工作面光照度降至362 lx,仍满足照明规范要求。紫外线阻隔率从46.54%升至99.38%,可减缓室内家具老化。全生命周期净碳减排1577 kgCO_(2),膜材生产碳排放仅占运行减排量的1.6%。项目静态投资回收期3.8年,抗风险能力强。本研究为夏热冬暖地区既有建筑外窗节能降碳改造提供了可复制的技术路径与数据支撑。
To achieve China’s“dual-carbon”goal,existing buildings in hot-summer/warm-winter zones suffer from high cooling demand and carbon emissions caused by large areas of single-pane clear glazing.A low-cost,fast“light retrofit”solution is therefore urgently needed.A 30 m^(2) southwest-facing lab-office room in a research building in Guangzhou was retrofitted with MAYR70 magnetron-sputtered metal film(Meikale).Measured data,EnergyPlus modelling and carbon-factor analysis were combined to quantify energy and carbon savings.Post-retrofit measurements showed an air-conditioning energy reduction of 30.2%,while the simulation gave 29.9%—a difference<5%,confirming model reliability.Under overcast conditions the 0.75 m work-plane illuminance fell to 362 lx,still above the lighting-code minimum.UV rejection rose from 46.5%to 99.4%,retarding interior fading.Life-cycle assessment indicated a net CO_(2)reduction of 1587 kg,with film production accounting for only 1.6%of the operational savings.The simple pay-back period is 3.8 years,demonstrating strong economic resilience.The study provides a replicable technical route and benchmark data for retrofitting existing windows in hot-summer/warm-winter regions.
作者
潘城岿
龙连芳
Pan Chengkui;Long Lianfang(Guangzhou Building Materials Industry Research Institute Co.,Ltd.)
出处
《建设科技》
2025年第22期66-70,共5页
Construction Science and Technology
基金
广东省住房和城乡建设厅科技创新计划项目《岭南地区既有建筑低碳化改造关键技术研究与应用》(2024-K2-051765)
广州市绿色建筑和建筑节能发展资金支持项目《夏热冬暖地区既有建筑低碳化改造关键技术研究与应用》。
