Abstract
The ship is a complex system that meets its own power demand during operation. The total power need differs and it is mainly provided by the main engine and energy sources derived from it. Additionally, the auxiliary systems as generators, and boilers also operate when needed so as to meet heat and electricity demand. The study reveals the potential of excess heat to produce H2 which can replace auxiliary energy demand so as to reduce auxiliary systems’ carbon emissions with the help of Polymer-electrolyte membrane (PEM) electrolysis. Hydrogen can be produced environmentally friendly way on board from waste heat sources during operation and stored as compressed form. The amount of available excess exhaust heat energy from the main engine, the efficiency of electrolyser and the PEM fuel cell efficiency determine the proportion of the excess energy, be used later. Study aims even a small amount of energy must be used to develop a less carbon energy approach in ships and shows 0.5 % annual saving can be achieved with excess heat conversion to H2.
| Original language | English |
|---|---|
| Pages (from-to) | 271-283 |
| Number of pages | 13 |
| Journal | International Journal of Hydrogen Energy |
| Volume | 75 |
| DOIs | |
| Publication status | Published - 19 Jul 2024 |
Bibliographical note
Publisher Copyright:© 2024 Hydrogen Energy Publications LLC
Funding
This article is an extended version of the conference paper named “The Availability of Onboard Hydrogen Production with Waste Heat” which was presented at the International Hydrogen Technologies Conference (IHTEC-2023). This research did not receive any specific grants from funding agencies in the public, commercial, or not-for-profit sectors.
Keywords
- Diesel engine
- Electrolysis
- Hydrogen
- Hydrogen production
- Ship emissions
- Waste heat recovery
