In designing a system for handling heavy fuel oil for a new generating plant of South Carolina Electric & Gas Co., Gilbert Associates determined that impedance heating would cost 20% less to operate annually than steam tracing and almost 10% less than electric resistance heating. Impedance heating applies high-amperage, low-voltage a-c directly to the pipeline to heat the pipe wall. The system was designed for thermostatic control at 140 F with ambient temperatures down to 20 F. Although the 50 mv maximum voltage is inherently safe, a ground-fault protection circuit automatically shuts down the system in the event that it becomes accidentally grounded, and simultaneously a warning light is turned on in the control room. The simplicity of impedance heating avoids many aspects of maintenance experienced with other types of heating systems.

  • Corporate Authors:

    Petroleum Engineer Publishing Company

    Box 1589
    Dallas, TX  United States  75221
  • Publication Date: 1974-4

Media Info

  • Pagination: 4 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00056385
  • Record Type: Publication
  • Source Agency: American Petroleum Institute
  • Files: TRIS
  • Created Date: Jul 15 1974 12:00AM