Cooling plates heat loss estimation for 50 kJ HTS SMES using coupled magneto-thermal transient analysis with a varying ramp rates

Superconducting magnet energy storage system made out of high temperature superconductor having solenoidal structure is in the form of a single or double pancake assembly. Due to the flat tape-like structure cooling plates made of copper are often employed to provide cooling to the internal layers of tapes. These plates are directly connected to cryocooler or exposed to cryogen. These plates act as a heat source on the refrigeration system due to AC losses that occurred during the charging and discharging of the magnet. The cooling plate is made up of copper which has high electrical and thermal conductivity. A magneto-thermal coupled simulation is performed to estimate the heat loss. The graph between the current ramp rate and total loss is obtained. Based on this, an increase in temperature rise is determined. (author)