Analysis and Design of Electromagnetic Pump

V. Teotia, S. Malhotra, K. Singh, and U. Mahapatra
Bhabha Atomic Research Centre, Mumbai, Maharashtra, India

Liquid metal loops are used for heat removal and for the study of certain magneto-fluidic phenomenon like MHD (Magneto-Hydro Dynamic) effects. These loops operate at high temperatures and carry fluids that are invariably toxic in nature. Ensuring the purity of fluid in a closed loop application needs non-intrusive pumps electromagnetic pumps. We have designed and analyzed a prototype electromagnetic pump to be used in mercury loop for carrying out various studies. This Electromagnetic pump is designed using permanent magnets which are mounted on periphery of rotor, which is rotated using DC motor. The liquid metal flows in a semi-circular duct surrounding the rotor. The paper brings out the qualitative and quantitative analyses of the pump as function of magnetization of the permanent magnets , the speed of rotation of the pump and magnet pitch. This electromagnetic pump has been developed and is running successfully in our lab at BARC.