Study on gas inerting characteristics of C-type tank of different inerting gas velocity

Zhong-lan Tuo; Jia-jia Deng; Da-wen Xue; Si-yu Deng; Lin Xu

doi:10.1117/12.3015153

6 February 2024 Study on gas inerting characteristics of C-type tank of different inerting gas velocity

Zhong-lan Tuo, Jia-jia Deng, Da-wen Xue, Si-yu Deng, Lin Xu

Proceedings Volume 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023); 129792G (2024) https://doi.org/10.1117/12.3015153
Event: 9th International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 2023, Guilin, China

Abstract

To investigate the influence mechanism of inerting gas inlet velocity in the liquid fuel tank gas inerting process, the gas inerting process of independent C-type liquid fuel tanks of LNG-powered ships was numerically investigated. By establishing a nitrogen inerting analysis simulation model and adjusting the inlet velocity of inert gas, the elapsed time (T1, T2, T3, T4, T5) of different evaluation criteria, the oxygen discharge efficiency, and gas mixing characteristics were compared and analyzed. The analysis results showed that: the SF (safety factor) of different options was greater than 1, so the safety performance as well. with the increase of the inlet velocity, the inerting process was accelerated, and the elapsed time of different evaluation criteria decreases rapidly, but the decreasing trend slows down after the inlet velocity was greater than 4 m/s. The inside tank inerting completion rate gradually decreases with the increase of the inlet velocity, and the reason could be the excessive inlet velocity enhanced the mixing process of inert gas and tank gas, causing the CRE (Containment Removing Efficiency) gradually decreases. The option of inlet velocity of 4 m/s is recommended due to the CRE is 97.38% and gas mixing degree φ is 1.27, which mean reductions of inerting elapsed time and inert gas consumption compared to other options.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Zhong-lan Tuo, Jia-jia Deng, Da-wen Xue, Si-yu Deng, and Lin Xu "Study on gas inerting characteristics of C-type tank of different inerting gas velocity", Proc. SPIE 12979, Ninth International Conference on Energy Materials and Electrical Engineering (ICEMEE 2023), 129792G (6 February 2024); https://doi.org/10.1117/12.3015153

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KEYWORDS

Vacuum purge

Liquids

Safety

Oxygen

Transportation

Protactinium

Vacuum chambers

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