Exam Question
Ammonia is widely discussed as a sustainable fuel for future maritime applications. Discuss with specific references to technical, operational, safety and commercial viability of ammonia as a marine fuel
Class 1 (Chief Engineer)
Engineering Management
📅 Dec 2022
Reference Answer
Ammonia (NH₃) is a prominent candidate for decarbonizing the maritime industry, offering a carbon-free combustion process. However, its adoption is contingent upon overcoming significant challenges across technical, operational, safety, and commercial domains.
### 1. Technical Viability
* **Combustion Characteristics**:
* **Energy Density**: Ammonia has a low volumetric energy density (approx. 18.6 MJ/kg), requiring about 2.3 times more storage volume than Marine Diesel Oil (MDO) for the same energy content. This has major implications for vessel design and cargo carrying capacity.
### 1. Technical Viability
* **Combustion Characteristics**:
* **Energy Density**: Ammonia has a low volumetric energy density (approx. 18.6 MJ/kg), requiring about 2.3 times more storage volume than Marine Diesel Oil (MDO) for the same energy content. This has major implications for vessel design and cargo carrying capacity.
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