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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。
Aiming at the peculiarities of charge regulation brought by HTR-10GT low heat recovery design, the quasi-steady-state characteristics and mechanism are studied. In this paper, we derive the main laws and mechanisms governing the regulation characteristics through simplified derivation based on assumptions. At the same time, the whole system is modeled and numerically simulated, and the conclusions are verified and supplemented through comparative analysis. The results show that the relative helium mass flow rate decreases slower than the relative load decrease rate in the process of adjustment, and the two approximate the parabolic relationship. The increase of the heat transfer during the adjustment helps to improve the circulation efficiency. However, Deviations from the design conditions and the Reynolds number effect will result in loss of cycle efficiency; in addition, the Reynolds number effect will have a partial negative effect on system stability. The results can provide reference for the cycle design and operation of high temperature gas cooled reactor (HTR).