Int. J. Emerg. Sci., 1(4), 607-614, December 2011 ISSN: 2222-4254 © IJES 607 Computer Simulation of Passive Device for Elimination of Static Electricity Nikola Dragović, Mićo Gaćanović University of Banja Luka, Faculty of Electrical Engineering, Patre 5, 78000 Banja Luka, Bosnia and Herzegovina dzonsa@yahoo.com , bilchy@blic.net Abstract. The paper describes conducted computer simulation of the passive device for elimination of static electricity, using example of pouring petroleum and petroleum products. The principled scheme of specified equipment is used, which is under international patent protection. Computer simulation of here proposed static electricity elimination device is made with software package MATLAB/Simulink v7.6 (R2010b). Finally, a conclusion with the comment on obtained results of the simulation is given. Keywords: Static electricity, Petroleum industry, Elimination of static electricity. 1 INTRODUCTION Elimination of static electricity in loading and refilling operations of oil and oil products and gas into the metal storage tanks and tank trucks is a very complex problem. Commonly used solution for the elimination of static electricity by grounding of metal tanks is proved to be incorrect and very dangerous, since it provides condition for a cumulative discharge from the surface of oil or oil product and gas also, to wall of metal grounded tank. Result of the described cumulative discharge is occurrence of a spark with ignition energy which is greater than minimum ignition energy (MIE) of combustible mixture in vapor space of a tank. In this way, an ignition of explosible mixture will occur and there will be an explosion and fire. Thus, it was necessary to propose an approach for the controlled elimination of static electricity (controlled redistribution of generated charge), as suggested above- mentioned passive device for elimination of static electricity. So, the main role of the device is controlled transmission of generated electrostatic energy (generated by superimposing of volume and surface charge on the surface of the considered liquid or gas phase condition) from vapor space of tank to a grounding system. In this paper, we conduct a computer simulation of the operation of proposed passive device for elimination of static electricity in software package MATLAB/Simulink v7.6 (R2010b).