박준선  김고은  김도영  김지원  박소정  박승진  윤진우  변정환  박현곤

Vol. 40,  No. 2, pp. 26-36, Apr.  2025
10.14341/JKOSOS.2025.40.2.26

electrostatic discharge diesel flow charging parameter fitting flow conditions

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The frequent handling of flammable liquids and gases in industries such as petrochemicals, refining, energy, and semiconductors poses a significant risk of fire or explosion due to electrostatic discharge. This risk is exacerbated in aging industrial facilities, where outdated equipment may increase static generation during critical processes. To address this challenge, this study experimentally investigates the electrostatic charging and relaxation behavior of diesel, a non-conductive flammable liquid, under diverse flow conditions. This approach advances prior research, which has predominantly focused on insulating oils. Unlike previous studies, this study employs a parameter-fitting methodology to quantitatively predict electrostatic behavior as a function of key variables, including fluid temperature, flow velocity, pipe diameter, and material properties. Experimental results reveal that increasing fluid temperature reduces electrostatic relaxation time, facilitating faster charge dissipation. Additionally, variations in flow velocity, pipe diameter, and material composition significantly impact the magnitude and temporal characteristics of electrostatic charging. By identifying the dominant factors governing electrostatic relaxation, this study provides practical insights for mitigating static-induced hazards in industrial environments. The findings establish a systematic framework for predicting static discharge characteristics and guiding safe operational practices, enhancing electrostatic safety management across diverse industrial applications.