密度锁反向启动特性实验研究

Experimental Study on Reverse Startup Characteristics of Density Lock

实验研究了密度锁反向启动特性,结果表明:启动流量是影响密度锁反向启动过程的关键因素,启动流量偏离平衡流量较小时,余热排出回路反向流量较小,依靠系统本身具有的自稳定性,将很快建立密度锁内水力平衡关系;而启动流量偏离平衡流量较大时,由于余热排出回路流量较大,较多冷却水进入主回路,导致加热水箱入口温度降低,入口温度的降低对密度锁水力平衡关系的建立具有一定的抑制作用,因此反向启动过程中最好避免这一现象的发生。

Reverse startup characteristics of density that the key factor of reverse startup process is the lock are studied experimentally, and it is shown startup mass flow, when the mass flow is more closer to the equivalent one, the reverse mass flow is smaller in residual heat removal loop, and the hydraulic balance in density lock will be built by self-balance characteristic of the system; While when the mass flow is less closer to the equivalent one, because of the larger mass flow and more cold wanter enters into primary loop, the entrance temperature of heat tank becomes lower which restrains hydraulic balance built in density lock, so the phenomena should be avoided during startup process.