“能碳双控”视角下的建筑光伏系统减碳效益分析

Analysis on Carbon Reduction Benefits of Building Photovoltaic Systems from the Perspective of"Both Energy and Carbon Control"

“双碳”背景下,绿色建筑发展面临“能碳双控”新挑战。现有建筑碳排放计算方法中未纳入对建筑所采用设备自身生产碳排放的考虑,特别是光伏组件等可再生能源系统设备产品的生命周期碳排放。针对这一现状,研究以某公共建筑作为案例,结合光伏组件各阶段的碳排放量数值,进行建筑全周期碳排放计算,并对建筑各阶段的碳排放强度进行了分析。计算结果表明,光伏部件生产阶段碳排放量占项目建材生产阶段碳排放量的比例达11.7%,光伏部件生产和运输阶段碳排放总量325.73 tCO_(2)e,占光伏组件在建筑寿命内运行期抵消碳排放量的11.8%。如忽视光伏系统产品生产阶段和运输的碳排放,将导致其对建筑全生命周期碳减排作用的高估,后续可考虑将其产品生命周期碳排放纳入建筑碳排放的全生命周期中考虑,以增强围绕建筑的跨产业协同联动,促进全行业角度形成碳减排合力。

Under the background of"Double Carbon",the development of green buildings faces the new challenge of achieving"dual control over both energy consumption and carbon emissions"!The existing building carbon emission calculation method does not include consideration of the carbon emissions from the production of the equipment used in the building,especially the life cycle carbon emissions of renewable energy system equipment products such as photovoltaic modules.In response to this situation,the study takes a public building as a case,combines the carbon emission values of photovoltaic modules at each stage to calculate the carbon emissions of the building throughout the cycle,and analyzes the carbon emission intensity of each stage of the building.The calculation results show that the carbon emissions from the photovoltaic component production stage account for 11.7% of the carbon emissions from the project building materials production stage,and the total carbon emissions from the photovoltaic component production and transportation stage are 325.73 tcO_(2)e,accounting for the photovoltaic module's operating period during the building life.Offset carbon emissions 11.8%.If the carbon emissions from the production stage and transportation of photovoltaic system products are ignored,it will lead to an overestimation of the carbon emission reduction effect of the entire life cycle of the building.Subsequently,consideration can be given to including the carbon emission during the life cycle of the building carbon emission.In order to enhance cross-industry synergy around construction and promote the formation of carbon emission reduction synergy froman industry-wide perspective.