Modelling and Simulation of On-Board Hydrogen Production Using Ammonia as A Feed For 2 x 1200 HP Marine Tugboat
アンモニアを原料とした2×1200 HP海洋タグボート用オンボード水素製造のモデリングとシミュレーション (AI 翻訳)
Aniq Luthfi, Y. Budhi
🤖 gxceed AI 要約
日本語
本研究では、アンモニア分解による水素を利用した2×1200HP燃料電池ベースの船舶推進システムを設計し、Aspen Plusでシミュレーションを行った。最適な反応器寸法（長さ0.5m、直径0.1m、管数30）を特定し、燃料構成の異なる2つのシステムを比較。システムA（水素44%、アンモニア56%）はGHG排出量が低い（15.63 ppm）が、システムB（ディーゼル比率高）の方がピーク効率が高い（40.62%）。水素比率を上げるとNOx排出が増加し効率が低下する。また、アンモニアと水素はディーゼルよりも体積要件が大きい。
English
This study designs a 2x1200 HP fuel-cell marine propulsion system using hydrogen from ammonia decomposition, simulated in Aspen Plus. Optimal reactor dimensions (0.5m length, 0.1m diameter, 30 tubes) were found. Two fuel configurations were compared: System A (44% H2, 56% NH3) had lower GHG emissions (15.63 ppm) while System B (higher diesel fraction) achieved higher peak efficiency (40.62%). Increasing hydrogen fraction increased NOx and reduced efficiency. Ammonia and hydrogen require larger volumes than diesel.
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
日本では海運業界の脱炭素化が急務であり、アンモニア・水素燃料の実用化が進んでいる。本シミュレーションは、具体的な船型（タグボート）を対象としたシステム設計の知見を提供し、日本船主や造船所の技術検討に資する。
In the global GX context
Ammonia and hydrogen are key alternative fuels for maritime decarbonization globally. This study provides a system-level simulation for a specific vessel type (tugboat), offering insights into reactor sizing and trade-offs between efficiency and emissions that are relevant to IMO regulations and shipyard design.
👥 読者別の含意
🔬研究者:Provides simulation methodology and optimal reactor parameters for ammonia-to-hydrogen marine propulsion.
🏢実務担当者:Useful for ship designers and maritime fuel system engineers evaluating ammonia/hydrogen retrofits or new builds.
🏛政策担当者:Highlights the technical feasibility and trade-offs of ammonia/hydrogen as marine fuels, informing decarbonization pathways.
📄 Abstract（原文）
Hydrogen and ammonia have emerged as promising alternative fuels to decarbonize the maritime sector, although issues such as hydrogen storage and the endothermic decomposition of ammonia pose significant implementation challenges. This study designs a 2×1200 HP fuel cell-based marine propulsion system using hydrogen from ammonia decomposition, aiming to identify the optimal configuration for maximum efficiency and minimal emissions. To achieve the objective, simulations were conducted in Aspen Plus V.14 in two stages: (1) Kinetic analysis of the ammonia decomposition reactor (RPLUG model) with varied dimensions to optimize cracking efficiency, and (2) Comparison of two system alternatives with differing proportions of NH3, H2 and diesel fuel to analyse the efficiency and emission produced by both systems. The result is (1) Optimum reactor parameters were determined as 0.5 m length, 0.1 m diameter, and 30 tubes, and (2) The highest NOx emission of both system were observed at 698.54 ppm (fuel fractions: XH2 = 0.44), System A (XH2 = 0.44, XNH3 = 0.56) yielded lower GHG emissions (15,63 ppm) than System B (86,057.45 ppm; XH2 = 0, XNH3= 0.17, Xdiesel oil = 0.83). However, System B achieved higher peak efficiency (40.62% vs. 40.06% at XH2 = 0). Increasing XH2 to 0.44 reduced efficiency to 39.81% and increasing NO, NO2 and N2O in both systems. Route-based fuel consumption analysis demonstrated higher fuel requirements for NH3 = 220,448 kg and H2 = 30,883 kg compared to diesel = 50,635 kg. Spatial assessments indicated that both NH3 and liquid H2 systems demand greater volume than conventional diesel.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1088/1742-6596/3195/1/012019first seen 2026-06-29 06:23:45
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