金刚线切割工艺已经成为当今光伏产业硅片生产的主流技术。该文采用生命周期分析方法,以1 kW多晶硅太阳电池光伏发电系统为模型,研究使用金刚线切割工艺替代原来的砂浆切割技术后,这一技术更新所带来的光伏产品的能耗和碳排放量的降低效应。计算表明：应用金刚线切割工艺的光伏系统生命周期碳排放为1358.53 kg/kW,金刚线切割工艺较砂浆切割工艺减少碳排放290.83 kg/kW,相当于砂浆切割工艺总碳排的17.6%,减少了电力消耗和资源耗费。以年日照时数1800 h/a计算,基于金刚线切割技术的光伏系统全生命周期碳排放回收期可缩短至1.62 a。
Abstract
Diamond wire sawing （DWS） technology has become the mainstream technology in silicon wafer production in today’s photovoltaic industry. In this paper, the life cycle analysis method is adopted to study the energy consumption and greenhouse gas （GHG） emission reduction with a 1 kW polysilicon cell photovoltaic power generation system model while diamond wire cutting technology replacing the original mortar cutting technology. The results show that the life cycle GHG emissions of photovoltaic systems using the diamond cutting process are 1358.53 kg/kW. Compared with the mortar cutting process, the GHG emission reduction is 290.83 kg/kW, which is equivalent to 17.6% of the total GHG emissions of the mortar cutting process, reducing power consumption and resource consumption significantly. Taking the annual solar hours as 1800 h/year, the full life cycle carbon recovery period of photovoltaic systems based on diamond cutting technology can be shortened to 1.62 years.
关键词
光伏 /
生命周期分析 /
多晶硅 /
太阳电池 /
金刚线切割 /
碳排放
Key words
PV /
life cycle analysis /
polysilicon /
solar cells /
diamond wire saw /
carbon emission
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基金
国家自然科学基金面上项目（21875199）; 双一流建设重点高校项目（0290-X2100502）; 福建省高校产学合作科技重大项目（2018H6021）; 能源学院发展基金项目（2017NYFZ05）
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