Reliability and Safety Improvement of Emission-Free Ships: Systemic Reliability-Centered Maintenance

Igder, Mosayeb Afshari; Rafiei, Mehdi; Boudjadar, Jalil; Khooban, Mohammad‐Hassan

doi:10.1109/tte.2020.3030082

Cited by 18 publications

(14 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…To choose the suitable IGBTs and diodes for the units, the voltage and current rating of the devices must be checked, and the thermal design of the device must be considered such that the calculated temperature will be within the allowable junction temperature. To do so, the junction temperature of the IGBTs and diodes are calculated by (9). The thermal resistances are extracted from datasheets [32].…”

Section: Redesigning Of the Sub-systems In The Case Studymentioning

confidence: 99%

“…Thus, research on the system-level reliability of the onboard power systems and charging systems for the transportation electrification is still developing. The previous research on related topics ranges from the reliability assessment of the onboard power system of the more-electric aircrafts [6], [7], the shipboard power system [8], [9] and the electric vehicles [10] to the reliability of PV systems [11]. In such studies, well-known reliability methods are employed to assess the system in terms of faulty-healthy states or the standard adequacy indices defined for power systems [12].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Multilayer Framework for Reliability Assessment of Shore-to-Ship Fast Charging System Design

Karimi

Zadeh

Suul

2022

IEEE Trans. Transp. Electrific.

View full text Add to dashboard Cite

In this paper, a multi-layer framework is proposed to assess the reliability of Shore-to-Ship Charging (S2SC) systems, considering the potential for failures of the main elements, such as power converters and batteries. The proposed reliability model enables evaluating a S2SC system with redundancy, multi-state system availability, and multi-variable design scenarios, based on a recursive algorithm. Instead of conventional Markov-chain multi-state models, a reduced order state-space model is established from a set of specific sub-systems with a predefined configuration complying with the design requirements. A modular approach is taken, and the probabilistic characteristics of the subsystems are established by developing a Universal Generating Function considering the available charging power and energy balance constraints. Then, the sub-systems are integrated into the system configuration to assess a set of proposed applicationspecific system-level reliability indices. Thus, the modular approach enables expansion to the power system dimensions without extra complexity. Finally, a case study based on an operating 4-MW dc S2SC system is performed by the proposed framework, and design suggestions are given based on a figure of merit defined for evaluation of reliability and energy efficiency. These design suggestions include resizing the charging system by installing onshore batteries, modularization, and introduction of redundancy in the sub-systems.

show abstract

Section: Redesigning Of the Sub-systems In The Case Studymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Multilayer Framework for Reliability Assessment of Shore-to-Ship Fast Charging System Design

Karimi

Zadeh

Suul

2022

IEEE Trans. Transp. Electrific.

View full text Add to dashboard Cite

show abstract

“…LT-PEMFC can deliver high power density, have efficiency of up to 60% and can be directly fed with pure hydrogen [54]. They operate between 65-85 • C (low start-up, high durability), but have less tolerance to fuel impurities [55]. HT-PEMFC have an operating temperature envelope ranging between 120-180 • C [56] and electrical efficiency of up to 60% [54].…”

Section: Fuel Cellsmentioning

confidence: 99%

“…HT-PEMFC have an operating temperature envelope ranging between 120-180 • C [56] and electrical efficiency of up to 60% [54]. Also, HT-PEMFC require additional time to start-up and have a higher tolerance to fuel impurities [55]. PAFC operate at around 150-200 • C and have similar durability and start-up characteristics as HT-PEMFC However, they have low power density, limited durability, 40% electrical efficiency [54] have restricted their commercial shipping applications [57].…”

Section: Fuel Cellsmentioning

confidence: 99%

Review on the Safe Use of Ammonia Fuel Cells in the Maritime Industry

et al. 2021

View full text Add to dashboard Cite

In April 2018, the International Maritime Organisation adopted an ambitious plan to contribute to the global efforts to reduce the Greenhouse Gas emissions, as set by the Paris Agreement, by targeting a 50% reduction in shipping’s Green House Gas emissions by 2050, benchmarked to 2008 levels. To meet these challenging goals, the maritime industry must introduce environmentally friendly fuels with negligible, or low SOX, NOX and CO2 emissions. Ammonia use in maritime applications is considered promising, due to its high energy density, low flammability, easy storage and low production cost. Moreover, ammonia can be used as fuel in a variety of propulsors such as fuel cells and can be produced from renewable sources. As a result, ammonia can be used as a versatile marine fuel, exploiting the existing infrastructure, and having zero SOX and CO2 emissions. However, there are several challenges to overcome for ammonia to become a compelling fuel towards the decarbonisation of shipping. Such factors include the selection of the appropriate ammonia-fuelled power generator, the selection of the appropriate system safety assessment tool, and mitigating measures to address the hazards of ammonia. This paper discusses the state-of-the-art of ammonia fuelled fuel cells for marine applications and presents their potential, and challenges.

show abstract

“…Failure mode analysis is widely used in many different sectors [60], with several publications summarising their different merits, shortcomings, and caveats [48,61]. In shipping, it has been employed to calculate appropriate maintenance tasks to improve the safety and reliability analysis of a hybrid system that includes fuel cells [62] or of a marine fuel oil system [63]. Similarly, FMEA/FMECA can be used to minimise downtime and improve reliability [64].…”

Section: Critical Reviewmentioning

confidence: 99%

Safety and Reliability Analysis of an Ammonia-Powered Fuel-Cell System

Trivyza

Cheliotis

Boulougouris

et al. 2021

Safety

View full text Add to dashboard Cite

Recently, the shipping industry has been under increasing pressure to improve its environmental impact with a target of a 50% reduction in greenhouse gas emissions by 2050, compared to the 2008 levels. For this reason, great attention has been placed on alternative zero-carbon fuels, specifically ammonia, which is considered a promising solution for shipping decarbonisation. In this respect, a novel ammonia-powered fuel-cell configuration is proposed as an energy-efficient power generation configuration with excellent environmental performance. However, there are safety and reliability concerns of the proposed ammonia-powered system that need to be addressed prior to its wider acceptance by the maritime community. Therefore, this is the first attempt to holistically examine the safety, operability, and reliability of an ammonia fuel-cell-powered ship, while considering the bunkering and fuel specifications. The proposed methodology includes the novel combination of a systematic preliminary hazard identification process with a functional and model-based approach for simulating the impact of various hazards. Furthermore, the critical faults and functional failures of the proposed system are identified and ranked according to their importance. This work can be beneficial for both shipowners and policymakers by introducing technical innovation and for supporting the future regulatory framework.

show abstract

Reliability and Safety Improvement of Emission-Free Ships: Systemic Reliability-Centered Maintenance

Cited by 18 publications

References 26 publications

A Multilayer Framework for Reliability Assessment of Shore-to-Ship Fast Charging System Design

A Multilayer Framework for Reliability Assessment of Shore-to-Ship Fast Charging System Design

Review on the Safe Use of Ammonia Fuel Cells in the Maritime Industry

Safety and Reliability Analysis of an Ammonia-Powered Fuel-Cell System

Contact Info

Product

Resources

About