Optimization of an intermediate heat exchanger for a natural circulation molten salt pebble-bed reactor
XUE Chunhui, DONG Yujie
Key Laboratory of Advanced Reactor Engineering and Safety of Ministry of Education, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China
Abstract：The nuclear hot spring design concept for molten salt pebble-bed reactors features full power natural circulation with the intermediate heat exchanger (IHX) providing most of the pressure drop in the primary loop outside the core. The IHX flow resistance efficiency is improved here using numerical simulations of the flow and heat transfer characteristics in the flow channel of the IHX. Response surfaces are given for the influences of the structural parameters on the flow resistance coefficient, the Colburn factor and the comprehensive evaluation factor. Optimal fin dimensions are given for small pressure drops but high heat transfer efficiencies based on a multi-objective genetic optimization scheme. An IHX is then designed using the optimized fin parameters through the Aspen software with a 30% decrease of the overall volume of the IHX.
薛春辉, 董玉杰. 自然循环熔盐球床堆中间换热器的优化设计[J]. 清华大学学报（自然科学版）, 2018, 58(5): 445-449.
XUE Chunhui, DONG Yujie. Optimization of an intermediate heat exchanger for a natural circulation molten salt pebble-bed reactor. Journal of Tsinghua University(Science and Technology), 2018, 58(5): 445-449.
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