Performance Analysis Based on Fuel Valve Train Control Optimization of Ammonia-Fuel Ships

Lim Seungtaek, Lee Hosaeng and Seo Youngkyun ()
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Lim Seungtaek: Korea Research Institute of Ships & Ocean Engineering, Daejeon 34103, Republic of Korea
Lee Hosaeng: Korea Research Institute of Ships & Ocean Engineering, Daejeon 34103, Republic of Korea
Seo Youngkyun: Korea Research Institute of Ships & Ocean Engineering, Daejeon 34103, Republic of Korea

Energies, 2024, vol. 17, issue 10, 1-17

Abstract: In order to reduce carbon emissions, which are currently a problem in the shipping and offshore plant sectors, the international community is strengthening regulations such as the Energy Efficiency Design Index (EEDI) and Energy Efficiency Existing Ship Index (EEXI). To cope with this, eco-friendly fuel propulsion technology is being developed, and the development of an ammonia fuel supply system is in progress. Among them, fuel valve train (FVT) technology was researched for the final supply and cutoff of fuel and purging through nitrogen for ammonia engines. In this paper, we analyzed the change in ammonia supply due to FVT opening and the change in nitrogen supply due to closure. In addition, a plan to minimize risk factors was presented by applying a control method to remove residual fuel in FVT. According to the presented FVT model, the difference in the flow rate of supplied fuel was as much as 17.8 kg/s. Additionally, by opening the gas bleed valve at intervals during the closing process and purging about 0.28 kg of nitrogen, the internal fuel could be completely discharged. This is expected to have an impact on improving the marine environment through the application of eco-friendly fuels and the development of fuel supply system technology.

Keywords: gas valve train; fuel valve train; fuel supply system; ammonia; nitrogen ventilation; main valve; bleed valve (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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