Maritime Transportation in the Blue Economy and Green Shipping Technology

Topic Information

Dear Colleagues,

The global shipping industry, which is responsible for transporting over 80% of the world’s goods, is currently undergoing a critical transformation to address its significant environmental impact—the industry accounts for approximately 3% of global greenhouse gas emissions. As international climate targets become more ambitious, the sector is rapidly adopting advanced green shipping technologies, alternative fuels, and digital innovations to reduce its environmental footprint and ensure long-term viability. Recent years have seen the International Maritime Organization (IMO) set a course for net-zero greenhouse gas emissions from shipping by or around 2050, with mandatory marine fuel standards and global emissions pricing frameworks to be implemented from 2027. These regulatory measures are driving the adoption of cleaner fuels, energy-efficient ship designs, and smart shipping solutions across the industry. This Topic explores the pivotal role of maritime transportation in advancing the blue economy worldwide, highlighting the integration of green shipping technologies, successful implementation case studies, and the economic and operational challenges encountered during this transition. By showcasing global leadership and fostering collaboration among key stakeholders, the Topic aims to accelerate the adoption of sustainable solutions and reinforce the shipping industry’s central position in shaping a sustainable future for global trade.

Dr. Chungkuk Jin
Dr. Junghwan Choi
Prof. Dr. Won-Ju Lee
Prof. Dr. Hokeun Kang
Topic Editors

Keywords

Participating Journals

Journal Name	Impact Factor	CiteScore	Launched Year	First Decision (median)	APC
Coasts coasts	-	-	2021	31.2 Days	CHF 1000	Submit
Energies energies	3.2	7.3	2008	16.2 Days	CHF 2600	Submit
Journal of Marine Science and Engineering jmse	2.8	5.0	2013	15.6 Days	CHF 2600	Submit
Sustainability sustainability	3.3	7.7	2009	19.3 Days	CHF 2400	Submit
Future Transportation futuretransp	1.7	3.8	2021	33.4 Days	CHF 1200	Submit

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Published Papers (2 papers)

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All Coasts Energies JMSE Sustainability Future Transportation

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20 pages, 2512 KB  

Open AccessArticle

Operational Strategies for CII Under Short Voyages: Hybrid Denominator Correction and CPP Mode Optimization

by Ji-Woong Lee, Quang Dao Vuong and Jae-Ung Lee

J. Mar. Sci. Eng. 2025, 13(10), 2010; https://doi.org/10.3390/jmse13102010 - 20 Oct 2025

Viewed by 174

Abstract

This study addresses structural distortions in the IMO Carbon Intensity Indicator (CII) for short-voyage training vessels and proposes corrective strategies combining denominator adjustments with controllable pitch propeller (CPP) mode optimization. Using 2024 operational data from a training ship, we computed monthly [...] Read more.

This study addresses structural distortions in the IMO Carbon Intensity Indicator (CII) for short-voyage training vessels and proposes corrective strategies combining denominator adjustments with controllable pitch propeller (CPP) mode optimization. Using 2024 operational data from a training ship, we computed monthly and annual CII values, identifying significant inflation when time-at-sea fractions are low due to extensive port stays. Two correction methods were evaluated: a hybrid denominator approach converting port-stay CO₂ to equivalent distance, and a Braidotti functional correction. The CPP operating maps for combination and fixed modes revealed a crossover point at approximately 12 kn (~50% engine load), where the combination mode shows superior efficiency at low speeds and the fixed mode at higher speeds. The hybrid correction effectively stabilized CII values across varying operational conditions, while the speed-band CPP optimization provided additional reductions. Results demonstrate that combining optimized CPP mode selection with hybrid CII correction achieves compliance with required standards, attaining a B rating. The integrated framework offers practical solutions for CII management in short-voyage operations, addressing regulatory fairness while improving operational efficiency for training vessels and similar ship types. Full article

(This article belongs to the Topic Maritime Transportation in the Blue Economy and Green Shipping Technology)

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17 pages, 2827 KB  

Open AccessArticle

Empirical Research to Design Rule-Based Strategy Control with Energy Consumption Minimization Strategy of Energy Management Systems in Hybrid Electric Propulsion Systems

by Seongwan Kim and Hyeonmin Jeon

J. Mar. Sci. Eng. 2025, 13(9), 1695; https://doi.org/10.3390/jmse13091695 - 2 Sep 2025

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Abstract

Equivalent energy consumption minimization methods of energy management systems have been implemented as a rule-based strategy to enhance electric propulsion system efficiency. This study compares the efficiencies of different systems by applying variable- and constant-speed generators with battery hybrid systems, measuring fuel consumption. [...] Read more.

Equivalent energy consumption minimization methods of energy management systems have been implemented as a rule-based strategy to enhance electric propulsion system efficiency. This study compares the efficiencies of different systems by applying variable- and constant-speed generators with battery hybrid systems, measuring fuel consumption. In the same scenario, the variable-speed operation showed a notable improvement of 10.36% compared to the conventional system. However, in the verification of hybrid system efficiency, onshore charged energy cannot be considered a reduction in fuel consumption. Instead, when converting onshore energy usage into equivalent fuel consumption for comparative analysis, both hybrid constant- and variable-speed operation modes achieved efficiency enhancements ranging from 5.5% to 9.79% compared to the conventional, nonequivalent constant-speed operation mode. Conversely, the nonequivalent variable-speed operation mode demonstrated an efficiency that was 5.41% higher than that of the hybrid constant-speed operation mode. In contrast, the battery-integrated variable-speed operation mode indicated a system efficiency approximately equal to that of the nonequivalent variable-speed operation mode. For vessels with load profiles characterized by prolonged periods of idling or low-load operations, a battery-integrated hybrid system could be a practical solution. This study demonstrates the necessity of analyzing load profiles, even when aiming for the optimal operational set points of the generator engine. Full article

(This article belongs to the Topic Maritime Transportation in the Blue Economy and Green Shipping Technology)

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