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Jens Kristian Lervik

Senior Research Scientist

Jens Kristian Lervik

Senior Research Scientist

Jens Kristian Lervik
Phone: 922 06 130
Department: Electric Power Technology
Office: Trondheim

Publications and responsibilities

Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1640224

In direct electrical heating system (DEHs), which is developed for subsea process to safeguard well stream through pipelines to topside process platform or shore, the production pipeline is also acts as an active conductor conducting large AC current to generate heat. The heating source is conductiv...

Authors Chen Anyuan Nysveen Arne Lervik Jens Kristian Høyer-Hansen Martin
Year 2018
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1640218

In Direct Electrical Heating (DEH) systems, the pipeline of subsea oil productions conducts a large AC current to generate heat. To further improve the effectiveness of the DEH, higher operating frequency is preferable. The electrical parameters of the carbon steel pipe are critical for a DEH system...

Authors Chen Anyuan Nysveen Arne Høyer-Hansen Martin Lervik Jens Kristian
Year 2018
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1594528

Direct Electrical Heating (DEH) is a field-proven technology for hydrate and wax management of subsea production pipelines. DEH has been in use for nearly 20 years and is installed on approximately 30 pipelines/flowlines with length up to 43 km and on 1000 m depth, Studies indicate significant cost-...

Year 2018
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1480950

A development programme founded by the Norwegian Research Council for further increase the competitiveness of the direct electrical heating (DEH) technology was initiated in 2016 and will finish at the end of 2018. The partners in this project have long experience in development, manufacturing, inst...

Year 2017
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1480948

A development program to further increase the competitiveness of the direct electrical heating technology has been initiated. By increasing the power frequency from 50/60 to 100-200 Hz, less current is needed to develop the same heat generation in the pipe. A test program is running with the purpose...

Year 2017
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1477559

Overheating of metallic ground screen connections at accessories of single core cables are the root cause of severe insulation failures in the distribution network. The overheating is due to a high transition resistance of the connections combined with high induced currents in the ground screens dur...

Authors Halvorson Hans Lavoll Hvidsten Sverre Kulbotten Harald Lervik Jens Kristian
Year 2017
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1369194

Direct electrical heating is a qualified method for flow assurance in coated oil and gas flowlines. A concern is ac corrosion on connected templates caused by stray currents from the DEH system. This has prevented DEH from being installed on flowlines with in-line templates and restricted heating of...

Year 2016
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1369191

Direct Electrical Heating (DEH) of offshore pipelines is an established cost-efficient and environmental friendly method for flow assurance in offshore oil production compared to traditional methods such as chemical injection. The first DEH system was installed in year 2000 in the North Sea, and is ...

Year 2016
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1258261

Single-core power cables with aluminium laminate used as radial watertight need qualified solutions and instructions regarding grounding. There is often lack of information from the cable suppliers regarding the importance of proper connections and use of sufficient cross section of grounding wires....

Authors Lervik Jens Kristian Solheim Kristian Thinn Kvaale Ketil Snarteland Gunnar
Year 2016
Type Part of a book/report
Publication
https://www.sintef.no/en/publications/publication/?pubid=CRIStin+1258145

This paper considers measurements of electrical parameters for subsea power umbilicals. Electrical system parameters given in the umbilical datasheets may be inadequate for dimensioning the electrical system as they often are IEC-specifications. The parameters may be estimated by finite element anal...

Year 2016
Type Part of a book/report