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港湾脱炭素化のための統合マルチエネルギーマイクログリッド：系統制約下におけるCHPベースの陸電供給の技術経済評価

Integrated Multi-Energy Microgrids for Port Decarbonization: A Techno-Economic Assessment of CHP-Based Cold Ironing Under Grid Constraints (原題)

Guelfi D, Pivatello A, Chiesa V

Research Squareプレプリント2026-09-02#エネルギー転換Origin: EU経営インパクト: コスト削減対象セクター: transport
DOI: 10.20944/preprints202609.0132.v1
原典: https://doi.org/10.20944/preprints202609.0132.v1

🤖 gxceed AI 要約

日本語

本研究は、系統容量が限られた港湾における陸電供給（コールドアイアニング）の代替案として、CHP、太陽光、蓄電池、熱回収を統合したマイクログリッドを評価。ケーススタディでは、従来の船内発電と比較してLCOEを約22%削減し、年間CO2排出量を約36%削減できることを示した。また、24時間の系統停電時にも島嶼運転で運用継続が可能。コージェネレーションが港湾をマルチエネルギーハブとして統合する鍵となることを示唆。

English

This study evaluates an integrated microgrid combining CHP, PV, battery storage, and heat recovery as an alternative to conventional shore power for cold ironing in grid-constrained ports. In a case study, the proposed configuration achieves a 22% reduction in LCOE and a 36% reduction in annual CO2 emissions compared to onboard auxiliary engine generation, while maintaining operational continuity during a 24-hour grid outage via island-mode operation. The findings highlight cogeneration as an enabling technology for transforming ports into multi-energy hubs.

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

日本の港湾では、SSBJ開示やカーボンニュートラルポート政策により陸電供給の導入が進むが、系統容量の制約が課題。本研究成果は、系統増強が困難な港湾におけるCHPベースのマイクログリッド導入の技術経済的根拠を提供し、港湾管理者や電力事業者にとって有用。

In the global GX context

Globally, ports face pressure to decarbonize under tightening regulations and IMO targets. This study provides evidence that CHP-based microgrids can enable cold ironing where grid reinforcement is constrained, offering a cost-effective and resilient solution. It contributes to the literature on ports as multi-energy hubs and informs infrastructure planning for shore power.

👥 読者別の含意

🔬研究者:Provides a techno-economic framework for evaluating CHP-based microgrids for port decarbonization, with quantitative results on LCOE and emissions.

🏢実務担当者:Offers a viable alternative for ports facing grid constraints, enabling cold ironing with lower costs and emissions, and ensuring resilience.

🏛政策担当者:Highlights the potential of integrated microgrids to support port decarbonization without costly grid reinforcement, informing policy on shore power incentives.

📄 Abstract（原文）

The decarbonization of port operations is becoming increasingly important due to tightening environmental regulations and the growing adoption of shore power solutions. However, the large-scale deployment of conventional onshore power supply (OPS) systems often is constrained by limited grid capacity, high infrastructure costs, and variability in the environmental performance of grid electricity. This study investigates whether an integrated port microgrid can provide a viable alternative for enabling cold ironing in grid-constrained ports. A case study is developed for a commercial port characterized by a maximum grid import capacity of 3 MW and a peak shore power demand of approximately 20 MW. Two alternative configurations are evaluated: conventional onboard auxiliary engine generation and an integrated microgrid incorporating combined heat and power (CHP) units, photovoltaic generation, battery energy storage, and thermal integration through heat recovery. Results indicate that the integrated microgrid can satisfy the required shore power demand while significantly reducing both costs and emissions compared with onboard generation under the assumptions of the case study. The proposed configuration achieves a levelized cost of energy (LCOE) of 0.157 €/kWh, corresponding to a reduction of approximately 22% compared to the conventional onboard auxiliary engine generation, and a reduction in annual CO₂ emissions of about 36%. The system also maintains operational continuity during a simulated 24-hour grid outage through island-mode operation under an N+1 redundancy criterion. Beyond the quantitative benefits, the findings highlight the role of cogeneration as an enabling technology for integrating multiple energy vectors within port infrastructures. By coupling electricity generation, thermal recovery, renewable energy, and storage within a coordinated microgrid architecture, the proposed solution transforms grid capacity limitations into opportunities for energy system optimization. The study contributes to the growing literature on ports as multi-energy hubs and provides evidence that integrated CHP-based microgrids can represent a technically feasible and economically competitive pathway for supporting cold ironing in ports where grid reinforcement is constrained, delayed, or costly under the conditions examined in this study.

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