Development of power combination system for high-power and long-pulse ICRF heating in LHD

Saito, Kenji; Wang, S.J.; Wi, Hyunho; Kim, H.J.; Kamio, S.; Nomura, G.; Seki, R.; Seki, T.; Kasahara, Hiroshi; Mutoh, T.

doi:10.1016/j.fusengdes.2018.12.039

Cited by 6 publications

(1 citation statement)

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“…The effective implementation of RF-EMH for EEOR in an oil-bearing formation requires a RF power generator (RFG) capable of emitting high amplitudes and optimal phases. Such systems have been applied in Ion Cyclotron Resonance Heating (ICRH) systems using travelling waves [33], [34]. Transmission lines (TLs) convey power from the RFG to feed-points of antennas [35].…”

Section: Introductionmentioning

confidence: 99%

Waveguide Analysis of Radiofrequency Transmission in Well Tubulars for Electromagnetic Heating of Heavy Oil

2023

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This paper presents the numerical modelling and simulation of a 2D vertical well tubular model excited by a coaxial radiofrequency transmission line placed in its annular space for the purpose of downhole RF energy transmission. The study identifies the mechanism of energy losses due to coupling between the transmission line and steel tubing and casing using resonance mode analysis. The design of a left-handed artificial power line is proposed to minimize the losses due to the right-handed properties of the coaxial transmission line. The design utilizes ideal lumped element method to determine the left-handedness of the right-handed coaxial transmission line over the industrial heating radio-frequency band. The model is developed and simulated using COMSOL multi-physics commercial simulation software. The effect of transmission line position within the annular space on the tangential magnetic field and resulting power losses along the tubing is discussed. It is observed that the resulting artificial power line improves RF power transmission over 60 m depths of the vertical oil well within the industrial heating radiofrequency band.

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Section: Introductionmentioning

confidence: 99%