【摘要】 国际热核聚变实验堆(ITER)低温系统的一个主要任务就是移除当磁场变化及聚变反应时在磁体系统内产生的大量脉冲热负荷。为了削减回到制冷机的热负荷峰值,在脉冲阶段将部分波动热负荷释放到磁体支撑部分,但这种方法将会导致磁体支撑部分的温度略有升高,从而影响磁体超导线的温度。为此建立了一个纵向场磁体的一维非稳态模型,采用FORTRAN语言编程求解一组非稳态的控制方程进行模拟计算,以此来研究实施这种方法的可行性。计算结果表明依靠磁体支撑部分吸收脉冲热负荷时,超导线的最高温度仍低于5K的最高限制。更多还原

【Abstract】 One of the key requirements for the International Thermonuclear Experimental Reactor(ITER) cryogenic system is the removal of large,pulsed heat loads deposited in the magnet system due to magnetic field variation and nuclear fusion.In order to smooth the peaks of such pulsed heat loads before being transferred to the LHe plants,part of pulsed heat loads are released to structures during plasma pulse.However,this method could cause the temperature-rising of structures,which will affect the temperature of coils.A 1D transient model for the toroidal field magnet was developed to verify the feasibility of this method.The simulation calculation was carried out by FORTRAN through solving a set of control equations.The simulation results obtained from this model show that the highest temperature of coils is lower than the allowed maximum temperature(5 K) with the pulsed heat loads absorbed by structures.更多还原