刘志远

Date:

2025-04-30

Title of Paper:

A gravity heat pipe for high voltage vacuum interrupter

Journal:

Journal of Zhejiang University - Science A

Summary:

To enhance nominal current of high voltage vacuum circuit breakers (VCBs), a gravity heat pipe was proposed to
replace stationary conducting rod of a high voltage vacuum interrupter. The heat pipe is composed of two coaxis tubes: the external
tube is made of oxygen-free copper and the inner tube is made of stainless steel. The bottom end of the inner stainless steel tube is
connected to the external copper tube by holes. Transient and static thermal performance of the heat pipe was measured, and the
thermal resistance of it was compared with that of a solid copper rod with the same dimensions. Experimental results showed that
thermal resistance of the heat pipe was about 1/3 of that of the copper rod, and it decreased slightly with the rising of the input heat
flux. 3D thermal simulation on a 126 kV/2000 A single break VCB was done to compare the thermal performance between the
proposed gravity heat pipe and the copper rod serving as the stationary conducting rod of the vacuum interrupter. Simulation results
revealed that in the heat pipe case, the maximum temperature between contacts was 67 °C lower than that in the copper rod case.

Co-author:

Yu,Liu,Feng,Wei,Wang,Zeng

Volume:

2009 10(9)

Page Number:

1305-1312

Translation or Not:

No

Date of Publication:

2009-10-21