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Model of the impact of use of thermal energy storage on operation of a nuclear power plant Rankine cycle

机译：使用热能储存对核电厂朗肯循环运行的影响模型

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Increasing electricity production by solar and wind energy is projected to impact the stability of electricity grids and consequently may limit the growth of renewable electricity generation. This issue can be ameliorated in part by increasing the flexibility of baseload power plants. A thermodynamic analysis of thermal energy storage (TES) coupled with a nuclear-powered Rankine cycle as one approach of increasing baseload flexibility is presented. During periods of excess capacity, the high-pressure steam supply is used to charge the TES. When electricity generation above the baseload capacity is required, the TES is discharged to generate steam for expansion in the low-pressure turbine. Pressure, temperature, and enthalpy state points within the cycle are presented over a range of charge and discharge rates. The capacity factor over a charge/discharge cycle is up to 9.8% higher than that of the same plant operated with steam bypass. This benefit increases with increasing charge and discharge power. With TES, the thermal-to-electrical efficiency is stable over a wide range of discharge rates. The results support future development of TES systems for baseload thermal power plants in a power grid in which renewable energy is prioritized.
机译：预计太阳能和风能发电量的增加会影响电网的稳定性，因此可能会限制可再生能源发电量的增长。通过增加基本负荷发电厂的灵活性，可以部分缓解此问题。提出了热能存储（TES）与核动力朗肯循环相结合的热力学分析，以此作为增加基本负荷灵活性的一种方法。在容量过剩期间，将使用高压蒸汽供应来填充TES。当需要发电量超过基本负荷容量时，将TES排放掉，以产生蒸汽供低压涡轮机膨胀。循环内的压力，温度和焓状态点在一定的充放电速率范围内显示。与通过蒸汽旁路运行的同一工厂相比，整个充电/放电循环的容量系数高出9.8％。随着充电和放电功率的增加，该好处也会增加。使用TES，热电效率在很宽的放电速率范围内稳定。该结果支持未来电网优先发展可再生能源的TES系统的发展。

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