A discussion is made on a new oil transporting system using magnetic coaxial pipe concerning its electrical characteristics and the experimental resuslts on a 150m length test pipeline. When magnetic coaxial pipe is used as a heater, the heat generation occurs uniformly and the voltage of the outside of the coaxial pipe is sufficiently low to be electrically safe even when the frequency is low. This system is applicable to long distance submarine pipelines.

Some considerations on a new oil transporting system using the magnetic coaxial pipe

A new circuit element with coaxial structure is proposed which is constructed by using two magnetic pipes. In this element, the inner pipe and the outer pipe are connected in series electrically, and current flows through both pipes. The element exhibits a number of interesting operating characteristics. There is a remarkable skin effect at the commercial frequency and appearance of unbalanced impedance between inner and outer pipe. In this paper, the magnetic coaxial pipe is shown to be useful as a heating element of pipe transportation for high viscous liquid by utilizing its remarkable skin effect. The voltage drop on the outside of outer pipe is very small, because the impedance of outer pipe is much smaller than that of the inner pipe. A pipe heating system with high power factor and sufficient heat generation therefore can be constructed with the magnetic coaxial pipe.

Some considerations on a new oil transporting system using the magnetic coaxial pipe

References

Impedance of magnetic coaxial pipe.