異なる電源構成下における系統連系太陽光発電システムのライフサイクルGHG排出量のシナリオベース評価
Scenario-Based Assessment of Life-Cycle GHG Emissions from Grid-Connected Photovoltaic Systems under Different Electricity Mixes (原題)
María E. Raygoza-Limón, Gabriel Trujillo-Hernández, José García, Abelardo Mercado-Herrera, Juan Carlos Ling-López, F. N. Murrieta-Rico
🤖 gxceed AI 要約
日本語
系統連系PVシステムのライフサイクルGHG排出を、電源構成別の3シナリオで評価した研究。1MWp・30年の参照システムで、回避排出量と純GHG便益は炭素集約的な電源ほど大きいが、全シナリオで正の便益が維持される。長期的な改善にはクリーンな製造・低炭素サプライチェーン・循環経済・適切な廃棄処理が鍵となる。
English
This study assesses life-cycle GHG emissions of grid-connected PV systems across three electricity-mix scenarios. Using a 1 MWp, 30-year reference system, it finds avoided emissions and net GHG benefits are largest in carbon-intensive grids but remain positive across all scenarios. Long-term gains depend on cleaner manufacturing, low-carbon supply chains, circular economy, and end-of-life management.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本では再エネ導入拡大と電源構成の脱炭素化がGX政策の中心課題であり、PVの実質的な排出削減効果を電源構成別に示す本知見は、企業の再エネ調達・Scope2削減戦略や政策評価に資する。
In the global GX context
As grids decarbonize globally, this scenario work clarifies that PV's marginal mitigation value declines with grid cleanliness, informing corporate renewable procurement strategy and the accounting of Scope 2 / avoided emissions under evolving disclosure frameworks.
👥 読者別の含意
🔬研究者:電源構成別のPVライフサイクルGHG評価手法と限界削減効果のシナリオ比較に関心を持つ研究者に有用。
🏢実務担当者:再エネ調達やScope2削減目標の設計において、系統炭素強度に応じたPV導入効果を理解する材料となる。
🏛政策担当者:再エネ導入政策の脱炭素効果を電源構成の違いに応じて評価する際の参考になる。
📄 Abstract（原文）
This study evaluates the carbon-related performance of grid-connected photovoltaic (PV) systems under different electricity-generation mixes using a literature-based, scenario-oriented life-cycle GHG emissions assessment. A 1 MWp utility-scale crystalline-silicon PV reference system was defined with an annual electricity generation of 1,640 MWh, a 30-year lifetime, and an annual degradation rate of 0.5%, resulting in a projected cumulative electricity output of 45,793.99 MWh. The analysis considered three benchmark electricity-mix scenarios: a high-carbon grid, a transitioning grid, and a low-carbon benchmark grid. The gross life-cycle GHG burden of the PV system was interpreted using a literature-based range of 10-36 g CO2e/kWh, with 19 g CO2e/kWh adopted as the median reference case. Results show that scenario-estimated avoided emissions and net GHG benefits are highest in carbon-intensive electricity systems and decrease progressively as grid carbon intensity declines. Nevertheless, the net GHG benefit remains positive across all benchmark scenarios and across the tested PV emission-factor range. The findings indicate that PV deployment provides the greatest immediate GHG mitigation in fossil-intensive grids, while long-term improvements depend on cleaner manufacturing, low-carbon supply chains, circular economy strategies, and responsible end-of-life management. Because the analysis relies on literature-derived PV emission factors and average grid carbon-intensity benchmarks, the results should be interpreted as comparative scenario estimates rather than as outputs from a full process-based LCA model.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://www.lidsen.com/journals/jept/jept-08-03-018/jept.2603018.pdffirst seen 2026-09-15 05:04:44 · last seen 2026-09-22 05:09:49
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