Superconducting Magnet Quench Circuit Cooling via Discharge Pipe
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Solution Overview
Problem
Conventional superconducting magnets face difficulties in assembling protection circuits within sealed spaces containing cooling gas and require additional heat exchange members.
Innovation Solution
A superconducting magnet design that locates the protection circuit outside the vacuum container, where it is in contact with a discharge pipe that cools the refrigerant gas during quenching, eliminating the need for a dedicated heat exchange member and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the protection circuit is located inside the sealed space containing cooling gas, then the cooling gas can directly cool the protection circuit, but the assembly becomes difficult and requires additional heat exchange members
Solution Approach 1:
The protection circuit is extracted from the sealed vacuum container and relocated to the external environment. The discharge pipe serves as the heat exchange interface, allowing the protection circuit to be cooled by the refrigerant gas flowing through the pipe without being physically located inside the sealed space. This resolves the contradiction by separating the protection circuit from the vacuum environment while maintaining thermal coupling through the discharge pipe.
2Temperature
If additional heat exchange members are added to cool the protection circuit, then the cooling function is improved, but the device complexity increases
Solution Approach 1:
The discharge pipe, originally designed solely for discharging refrigerant gas from the vacuum container, is given an additional function: serving as a heat exchange member for cooling the protection circuit. The refrigerant gas flowing through the discharge pipe naturally cools the protection circuit that is in contact with the pipe's external surface. This multi-functionality eliminates the need for separate heat exchange members, reducing device complexity while maintaining effective cooling.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for easy assembly and efficient cooling of the protection circuit without additional heat exchange members, enhancing the operational simplicity and reliability of the superconducting magnet.
Implementation Method 1
the protection circuit is cooled during the quenching by the discharge pipe that has been cooled by sensible heat of the refrigerant gas
Implementation Method 2
a persistent current switch quenches, the persistent current switch transitions to the normal conducting state, causing a voltage to be generated across the switch
Data Source
AI summary
A discharge pipe is connected to a refrigerant container from outside of a vacuum container, and discharges a vaporized refrigerant. A pair of external leads are electrically connected respectively to opposite ends of a superconducting coil from a position outside of the vacuum container, so as to cause a current to flow through the superconducting coil. A protection circuit is electrically connected to the superconducting coil, and consumes energy stored in the superconducting coil during quenching. The protection circuit is in contact with the discharge pipe outside of the vacuum container.