Design of a Hybrid Geothermal and Concentrated Solar Power System with Thermal Storage
蓄熱システムを備えた地熱・集光型太陽熱ハイブリッドシステムの設計 (AI 翻訳)
Ochieng GO, Mariach LK, Bett GK, Bett AK
🤖 gxceed AI 要約
日本語
ケニアのオルカリアIV地熱サイトを対象に、地熱発電と集光型太陽熱（CSP）および蓄熱（TES）を組み合わせたハイブリッドシステムを設計。年間0.7%の地熱出力低下をCSPで補償し、TESによりディスパッチャブル電力を実現。経済性分析では、総投資額8.87億ドルに対し、25年プロジェクトで実質LCOE 12.23¢/kWh、NPV 17.7億ドル、IRR 29.81%と高い収益性を示した。
English
This study designs a hybrid geothermal-CSP system with thermal storage at Kenya's Olkaria IV field, compensating for the 0.7% annual geothermal decline. Economic analysis over 25 years shows a real LCOE of 12.23¢/kWh, NPV of $1.77B, and IRR of 29.81% on an $887M investment, demonstrating technical and economic viability for Kenya's grid.
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
日本は地熱資源に恵まれながら開発が遅れており、本論文のハイブリッド方式（地熱＋太陽熱＋蓄熱）は、地熱の出力安定化と追加投資の経済性評価に参考となる。特に、既存地熱サイトへCSPを後付けするシナリオは、日本の地熱発電所のリパワリングに応用可能。
In the global GX context
This paper provides a rigorous techno-economic framework for integrating CSP and thermal storage with geothermal plants, relevant for global renewable hybrid projects. It offers LCOE and NPV benchmarks for dispatchable renewable power in emerging economies, supporting ISSB-aligned disclosure on transition risk and asset performance.
👥 読者別の含意
🔬研究者:A case study of geothermal-CSP hybridization with detailed economic indicators (LCOE, NPV, IRR, payback) and sensitivity analysis.
🏢実務担当者:Useful for power project developers evaluating hybrid renewable investments, especially in regions with geothermal and high solar resources.
🏛政策担当者:Provides evidence for policy support of hybrid renewable systems to ensure grid reliability and attract private investment in Kenya and similar contexts.
📄 Abstract（原文）
<title>Abstract</title> <p>The Olkaria IV geothermal site in Kenya serves as the focal point for this investigation into a hybrid renewable energy configuration that couples geothermal generation with concentrated solar power (CSP) and thermal energy storage (TES). A well-documented limitation of geothermal plants is the progressive decline of reservoir output attributable to declining reservoir pressure, temperature, and flow rates, with degradation estimates approximating 0.7% annually. CSP integration offers a thermal compensation mechanism that mitigates this decline while TES enables the system to deliver dispatchable electricity on demand. The economic performance of the proposed hybrid system was assessed through four principal indicators: LCOE, NPV, IRR, and payback period, evaluated over a 25-year project lifespan. Site-specific simulation data informed the analysis, coupled with sensitivity testing across a range of financial and environmental assumptions. The hybrid configuration requires an upfront capital investment of $886,990,336, yet produces 1,467,525,376 kWh in its first operational year. On the financial side, a real LCOE of 12.23 ¢/kWh and a real levelized PPA price of 22.01 ¢/kWh underpin a project NPV of $1,766,798,208, with an IRR of 29.81% attained at year 20. Taken together, the evidence establishes that geothermal-CSP hybridization is both technically sound and economically justified, positioning it as a credible contributor to Kenya's renewable energy expansion and national grid reinforcement goals.</p>
🔗 Provenance — このレコードを発見したソース
- Research Square https://doi.org/10.21203/rs.3.rs-10212720/v1first seen 2026-07-16 04:44:13
🔔 こうした論文の新着を逃したくない方は キーワードアラート に登録（無料・3キーワードまで）。
gxceed は公開メタデータに基づく研究支援データセットです。要約・翻訳・解説は AI 支援で生成されています。 最終的な解釈・検証は利用者が原典資料に基づいて行うことを前提とします。