초록 ▼

A method and an apparatus are provided by which a high temperature superconductor can be cooled to a lower temperature easily and conveniently at a low cost. In the cooling method and apparatus according to the present invention, a high temperature superconductor constituting a cable (50) is cooled

A method and an apparatus are provided by which a high temperature superconductor can be cooled to a lower temperature easily and conveniently at a low cost. In the cooling method and apparatus according to the present invention, a high temperature superconductor constituting a cable (50) is cooled by liquid refrigerant (41). The refrigerant (41) is cooled by a refrigerator (10) to or below the freezing point which is given by the refrigerant having a stationary state in the cooling system. The cooled refrigerant is forced to flow and circulated by a pump (34), and such a physical action maintains the refrigerant in a fluid state at a temperature equal to or lower than the freezing point. A viscometer (61) may be used to measure the viscosity of the refrigerant to modulate the flow rate of the refrigerant according to the measured viscosity. According to the present invention, liquid nitrogen is maintained in a fluid state at approximately 45 K, for example.

대표청구항 ▼

1. A method of cooling a superconductor by a refrigerant comprising the steps of:cooling the refrigerant to or below a freezing point which is given by the refrigerant having a stationary state in a cooling system for the superconductor; maintaining the refrigerant having a temperature equal to or l

1. A method of cooling a superconductor by a refrigerant comprising the steps of:cooling the refrigerant to or below a freezing point which is given by the refrigerant having a stationary state in a cooling system for the superconductor; maintaining the refrigerant having a temperature equal to or lower than the freezing point in a fluid state by a physical action on the cooled refrigerant; and cooling the superconductor to or below a critical temperature of the superconductor by the refrigerant in the fluid state.