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A Breakthrough for Gas Circuit Breaker
- Miniaturization and the safety of gas circuit breaker (GCB) validated
through virtual operation experiment by a supercomputer.
Prof. Hideya Nishiyama and Assistant Prof. Hidemasa Takana, the
Institute of Fluid Science (IFS) Tohoku University conducted
coupling
analysis of
hot
gas
flow
and
an electrical field in the GCB with the use of a supercomputer in the
IFS.
This study was carried out in a joint research with the Power and
Industrial Systems Research and Development Center, Toshiba Corportation.
The rapid
cooling of exhaust
hot
gas flow
was promoted
in
the exhaust
tube
with
rough surface
during a large current interruption.
Application of a roughness pattern in appropriate
locations
of the exhaust
tube
leads to turbulent mixing
and diffusion,
strong vortex
in the
exhaust
of hot gas
flow.
Therefore, the occurrence of a
ground fault
was not observed.
In comparison of GCB test results between this model and
real
equipments, the outer
tank
of the GCB can be minimized by 20% through introduction of roughness in
the inner wall of the GCB exhaust
tube.
SF6 which is the operation gas (with global warming factor is
23,900 times larger than CO2) is therefore expected to be
decreased
by 40%.
The research findings will be published in “IEEE Transactions on
Power Delivery” and Toshiba Corp. will try to utilize this for the
world’s smallest products.
Past News
Evaluation System for Nano-Particle Processes Established through
Supercomputer
Prof. Nishiyama Honored“Physics
of Welding Award”
Related
URL
Nishiyama & Takana
Laboratory
Contact:
Prof. Hideya Nishiyama
Intelligent Fluid Systems Division
Institute of Fluid Science,
Tohoku University
Tel: +81-22-217-5260
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