Analysis on the Pump Selection in the Reconstruction of the Cooling Water System at Chinese High Magnetic Field Laboratory.

Chinese High Magnetic Field Laboratory (CHMFL) will build a resistive magnet with steady magnetic field strength of 42 Tesla which will set a new record for a single resistive magnet. As one of the important auxiliary systems, the cooling water system needs to be fully upgraded to meet the higher cooling requirements of the magnet and the power system. In this paper, the reconstruction scheme of cooling water system is introduced firstly, then the parameters selection of the chilled water pumps and high-pressure pure water pumps are emphatically analyzed. The data fitting method and the applied fluid technology software ATF Fathom were used to analyze and check the selection of chilled water pump. After these pumps are in place, the effectiveness of the above analysis scheme has been verified through testing, which can provide a reference for the reconstruction of pumps in other systems. For the high-pressure pure water pump, the solution focuses on improving the overall cooling capacity of the pump group and also improving the system stability. Based on the large-circulation-flow magnet of CHMFL, tests were conducted on the parallel operation capability of the new and old pumps, and the system characteristic curve and pump performance curve are analyzed and researched. The result shows that the pump parameters selection is reasonable and the magnet cooling circulation capacity is effectively improved. [ABSTRACT FROM AUTHOR]