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http://dx.doi.org/10.7837/kosomes.2017.23.5.541

A Study on Process Design of Hot Oil Flushing System Using Oil-Nitrogen Gas Mixing Fluid  

Lee, Yoon-Ho (Department of Marine System Engineering, Graduate School of Mokpo National Maritime University)
Choi, Bu-Hong (Division of Marine Engineering & Coast Guard, Mokpo National Maritime University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.23, no.5, 2017 , pp. 541-548 More about this Journal
Abstract
A theoretical study on gas-liquid two-phase flow flushing systemnitrogen gas to the oil used for existing flushing equipment was conducted on the basis of ISO code so as to improve performance of existing high-temperature oil flushing equipment used in ocean plant facility drying field. For study, we analyzed process simulation results mixed fluid mixing ratio, temperature, Reynolds number and liquid hold up affectcleaning performance after designing oil-nitrogen gas mixture flushing system process. As a result, as the volume flow rate of mixed fluid increases with the tube diameter the volume fraction of the gas phase constant, the liquid fraction difference value at the inlet and outlet of horizontal hydraulic piping increases. It was found that the phase distribution between oil and nitrogen gas bubbles varies depending on the position the pipe lengthdirection. This change in phase distribution is expected to have a significant impact on the clean performance of an oil-nitrogen gas mixture flushing system.
Keywords
Hot oil flushing; Mixing fluid; ISO code; Volume fraction; Liquid hold up;
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