HTR-10GT充装量调节特性及其机理

HTR-10GT inventory control characteristics and mechanism

针对HTR-10GT低回热度设计带来的充装量调节规律的特殊性进行了准稳态特性与机理研究。该文通过基于假设的简化推导得到支配调节特性的主要规律与机理,同时对系统整体进行建模与数值仿真,通过对比分析对结论进行验证与补充。研究结果表明:调节过程中相对氦气质量流量降低速率慢于相对负载降低速率,二者近似满足抛物线关系;调节过程中回热度的升高有助于提高循环效率,然而温比的降低、部件偏离设计工况以及Reynolds数效应将导致循环效率的损失;另外Reynolds数效应还会对系统稳定性产生部分负面影响。研究结果可为高温气冷堆(HTR)的循环设计与运行提供参考。

The HTR-10 GT inventory control characteristics were analyzed to design a system with low recuperated effectiveness.The system was modeled using a simplified model based on reasonable hypotheses and numerical simulations of the entire system model.The results illustrate that the helium mass flow rate decreases as the load decreases but at a slower rate with both following approximately quadratic relations.The regenerator effectiveness is improved which improves the cycle efficiency;however,the efficiency is reduced by temperature ratio decreases,several components deviating from their design operating points and Reynolds number effects.The Reynolds number effects also negatively impact the compressor stability.This study provides reference information for high temperature gas-cooled reactor（HTR）cycle design and operation.