Impedance heating system with skin effect particularly for railroad tank cars

摘要: An impedance skin effect heating system for tanks or vessels containing a liquid includes unit having rigid outer pipe conductor mounted through an opening in the tank and extending therein, to be immersed central supported within by spaced-apart temperature resistant asbestos insulation discs. The discs are held flanking metal collars welded insertion of into while maintaining desired position on conductor. end cap is both conductor, sealing ends thereof establishing electrical contact therebetween. conductors connected source AC power, usually transformer, cause generate heat via impedance, reactance, hysteresis eddy currents. A plurality such units may powered three-phase power with being balanced transformer. additional fluid transfer subsystem provided pumping formed as pipe, utilizing tubing carry point use. designed have sufficient thickness that current flow therethrough concentrated inside surface so surfaces contacted heated no voltage thereon.