【摘要】 采用更加真实的阻力模型分析了流动阻力对10MW高温气冷堆(HTR-10)氦气透平循环特性的影响规律。分析结果表明,高温气冷堆氦气透平循环的压力损失主要由局部阻力和摩擦阻力组成。10MW高温气冷堆闭式氦气透平循环(HTR-10GT)发电系统在实际充装量调节及额定工况下,氦气在部件连接管道的局部压降占82.4%,沿程阻力压降占17.6%。氦气充装量减小时,局部压损系数不变而沿程阻力系数增大,导致循环效率降低;当充装量由100%降低到30%,连接管道的局部压降份额下降约20%,系统效率下降15%左右。随着充装量的减小,做功部件的进出口压力随充装量的变化线性变化,压气机的压比略有增大,透平的膨胀比有较大幅度的非线性增大。更多还原

【Abstract】 The influence of the flow resistance on the property of the helium turbine cycle of the 10 MW high temperature gas-cooled reactor(HTR-10) was analyzed by using a resistance model closer to real condition.The analysis results show that the total pressure drop in the Brayton cycle is comprised mainly of local pressure loss and friction loss.When the HTR-IOGT generator’s mass flow rate of helium is 4.77kg/s as designed,in connecting pipes,the local pressure loss accounts for 82.4%,and the friction loss is about 17.6%.The proportion of pressure drop in cycle pressure changes with outlet temperature of reactor and helium inventory.Helium inventory is one approach to control of the HTR-IOGT by means of working fluid’s mass flow rate.When the mass flow rate of helium decreases,the local pressure loss coefficient keeps constant and the pressure loss coefficient increases.As a result,the efficiency of the closed cycle is decreased.When the mass flow rate of helium decreases from 100%to 30%of the rated value,the percentage of local pressure drop in connecting pipes decreases about 20%,and the cycle efficiency decreases about 15%.With the decrease of helium inventory,the input pressure and output pressure of the turbinemachinary decrease linearly,and the pressure ratio of compressor has a little increase while the pressure ratio of the helium turbine has a big increase.更多还原