FULL LIFE CYCLE ASSESSMENT OF MONOCRYSTALLINE SILICON PHOTOVOLTAIC SYSTEM

Luo Zhao; Yu Pinqin; Wang Hua; Liang Hesen; Li Jiahao; Zheng Li

doi:10.19912/j.0254-0096.tynxb.2024-1022

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Acta Energiae Solaris Sinica ›› 2025, Vol. 46 ›› Issue (10) : 237-243. DOI: 10.19912/j.0254-0096.tynxb.2024-1022

FULL LIFE CYCLE ASSESSMENT OF MONOCRYSTALLINE SILICON PHOTOVOLTAIC SYSTEM

Luo Zhao¹, Yu Pinqin¹, Wang Hua², Liang Hesen¹, Li Jiahao³, Zheng Li¹

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Abstract

In order to assess environmental impact throughout the full life cycle of the monocrystalline silicon photovoltaic system, a life cycle assessment （LCA） method was used to analyze and evaluate the energy consumption and carbon emissions of the production, transportation, operation and recycling stages of the 1 kW monocrystalline silicon photovoltaic system. The results show that the whole life cycle energy consumption of the 1 kW monocrystalline silicon photovoltaic system installed in Kunming is 992.08 kWh, with carbon emissions of 2033.24 kg. The energy payback period and carbon payback period are 0.90 and 16.96 years, respectively, both of which are shorter than the system’s operational lifespan. Energy consumption and carbon emissions are primarily concentrated in the production stage, with the production of solar-grade polysilicon having the largest share, followed by the production of balance-of-system components and monocrystalline silicon wafers. Improving the production technologies for solar-grade polysilicon, balance-of-system components, and monocrystalline silicon wafers, as well as enhancing the recycling efficiency of discarded photovoltaic systems, is key to reducing energy consumption and carbon emissions. Additionally, transportation distance and installation location can impact the energy payback period and carbon payback period.

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monocrystalline silicon / photovoltaic / life cycle assessment / energy payback period / carbon payback period

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Luo Zhao, Yu Pinqin, Wang Hua, Liang Hesen, Li Jiahao, Zheng Li. FULL LIFE CYCLE ASSESSMENT OF MONOCRYSTALLINE SILICON PHOTOVOLTAIC SYSTEM[J]. Acta Energiae Solaris Sinica. 2025, 46(10): 237-243 https://doi.org/10.19912/j.0254-0096.tynxb.2024-1022

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