再生可能エネルギーを用いた水素製造システムの技術経済評価とライフサイクル評価

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:分散型水電解のLCA・TEA統合手法と感度分析の枠組みを参考にできる。

🏢実務担当者:再エネ調達と稼働率が水素コスト・炭素強度を左右する点を投資判断に活用可能。

🏛政策担当者:水素普及には低炭素・低価格電力の確保と稼働時間支援策が鍵となることを示唆。

: Distributed hydrogen production has garnered significant attention due to its potential to reduce transportation costs and utilize local renewable energy sources. This study develops a comprehensive life cycle assessment (LCA) and techno-economic analysis framework for distributed hydrogen production based on a 100 MW alkaline water electrolysis system modeled in Aspen Plus. The process simulation provides detailed mass and energy balances to quantify the system’s performance across three key dimensions: environmental, economic, and energy. Environmentally, when powered by photovoltaic electricity, the system achieves a total life cycle carbon footprint of 1.94 kg CO 2 eq/kg H 2 , with approximately 91% of emissions originating from the electrolyzer’s power consumption. Economically, the levelized cost of hydrogen (LCOH) is calculated at 25.403 CNY/kg, placing the system competitively within current green hydrogen estimates, though it remains above traditional fossil-based routes. Energetically, the system exhibits an overall energy efficiency of 56.57% and an exergy efficiency of 55.61%, revealing that system irreversibility (exergy destruction) is predominantly concentrated within the electrolyzer unit. Sensitivity analysis indicates that annual operating hours (capacity factor) and renewable power carbon intensity (electricity prices) are the most critical drivers for economic viability. Therefore, securing low-carbon, low-price renewable electricity and extending operational hours are essential to enhancing the competitiveness of distributed hydrogen production.

• semanticscholar https://www.techscience.com/files/onlinefirst/2026/10.8/TSP_EE_82598/TSP_EE_82598.pdffirst seen 2026-10-12 05:04:37 · last seen 2026-10-14 05:37:59