Speaker
Description
Chinese High Magnetic Field Laboratory (CHMFL) is one of the five major labs of steady high magnetic field around the world. In Sep. 2024, its new built resistive magnet produced a steady field of 42.02 Tesla(T) with the power supply of 32.3 MW, which was the highest magnetic field of the resistive magnet in the world. In order to meet the operation requirements of the new magnet that the cooling water system has been completed the upgrading. The cooling water system has undergone comprehensive upgrades and renovations in terms of refrigeration, cooling supply, heat exchange, and purification. At present, the magnet has been open to users for experiments. By running six high-pressure pumps in parallel, the circulating cooling water flow rate of the 42.02 T resistive magnet is nearly 1700 m3/h under the pressure difference of 24.5 bar. The max flow rate of the chilled water supply is nearly 2000 m3/h through three newly replaced 132 kW chilled water pumps are running in parallel. The heat transfer capability of the system has also been upgraded. The purification flow rate of deionized water increased from 65 m3/h to 90 m3/h. In addition, the upgraded cooling water system also includes a cooling circuit for the newly added 14 MW power system. The operating parameters and energy efficiency of the cooling water system under high magnetic field experiments will be analyzed in detail.
