Abstract
Cryogenic Cold Circulating Pump (CCP) provides cryogenic cooling of superconducting magnets (SC) and cryopumps in fusion research reactors by forced flow circulation of supercritical helium (SHe) at desired pressure head during various operating modes. The existing operating CCPs for helium have comparatively very less capacity, of the order 1.2 kg/s, than the future requirements of the order of 3 kg/s. Actual performance of CCP deviates from the theoretical ideal performance due to various fluid-dynamic losses involved during the operation. Design of CCP may be improved by prediction of losses through performance analysis. The present work involves performance analysis of the cryogenic CCP with outline of its major geometric dimensions obtained through basic design. Various loss models and its contribution to the head versus flow (H-Q) characteristics curve at different operating speed of CCP, obtained from the MATLAB® program, shows the best operating point with respect to system characteristics.
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