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Heat Integration of Liquid Hydrogen-Fueled Hybrid Electric Ship Propulsion Systemopen access

Authors
Jung, WongwanLee, JinkwangChang, Daejun
Issue Date
Nov-2023
Publisher
Multidisciplinary Digital Publishing Institute (MDPI)
Keywords
fuel gas supply system; heat integration; hybrid electric ship propulsion system; liquid hydrogen; lithium-ion battery; thermal management
Citation
Journal of Marine Science and Engineering, v.11, no.11
Indexed
SCIE
SCOPUS
Journal Title
Journal of Marine Science and Engineering
Volume
11
Number
11
URI
https://scholarworks.gnu.ac.kr/handle/sw.gnu/68801
DOI
10.3390/jmse11112157
ISSN
2077-1312
2077-1312
Abstract
This study introduced the methodology for integrating ethylene glycol/water mixture (GW) systems which supply heat energy to the liquid hydrogen (LH2) fuel gas supply system (FGSS), and manage the temperature conditions of the battery system. All systems were designed and simulated based on the power demand of a 2 MW class platform supply vessel assumed as the target ship. The LH2 FGSS model is based on Aspen HYSYS V11 and the cell model that makes up the battery system is implemented based on a Thevenin model with four parameters. Through three different simulation cases, the integrated GW system significantly reduced electric power consumption for the GW heater during ship operations, achieving reductions of 1.38% (Case 1), 16.29% (Case 2), and 27.52% (Case 3). The energy-saving ratio showed decreases of 1.86% (Case 1), 21.01% (Case 2), and 33.80% (Case 3) in overall energy usage within the GW system. Furthermore, an examination of the battery system’s thermal management in the integrated GW system demonstrated stable cell temperature control within ±3 K of the target temperature, making this integration a viable solution for maintaining normal operating temperatures, despite relatively higher fluctuations compared to an independent GW system. © 2023 by the authors.
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