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Standards Development
This document specifies general test and inspection procedures for heat exchangers used in shipboard ammonia fuel systems. It encompasses testing methods, acceptance criteria, and safety considerations specific to the use of ammonia as marine fuel.
Ammonia is recognized as one of the effective alternative fuels in achieving the International Maritime Organization's (IMO’s) 2050 net zero carbon emission goal. Ammonia is expected to constitute the largest share of global shipping energy consumption by around 2050.
Ammonia is convenient to store and transport and can be produced on a large scale. It also has a high cost-benefit advantage with production costs around 32% lower than liquefied hydrogen. On the other hand, due to its toxicity, ammonia requires special safety requirements in handling. It can also cause Stress Corrosion Cracking (SCC) due to its corrosive properties and may emit fine particulate matter into the atmosphere in case of improper operation.
Ammonia fueled engines are being developed. In order to use ammonia as ship fuel, it is necessary to develop technologies that can eliminate risks, as well as inspection criteria and operational procedures. Guidelines and standards for inspection and testing of ammonia system components are not developed yet. This proposal sets up general test and inspection requirements for heat exchangers used in ammonia fuel systems. It is expected that useful information can be provided to marine industry such as ship owners, classification societies, shipyards, etc. Finally, this document would contribute to the growth of relevant industries and benefit all related stakeholders.
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