Thermal analysis of closed feedwater heaters in nuclear power plants
Thermal analysis of closed feedwater heaters in nuclear power plants
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DOI：
10.1016/j.applthermaleng.2014.04.006
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发表时间：
2014-07
影响因子：
6.4
通讯作者：
M. Álvarez-Fernández;L. Portillo-Valdes;C. Alonso-Tristán
中科院分区：
文献类型：
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作者：
M. Álvarez-Fernández;L. Portillo-Valdes;C. Alonso-Tristán
介绍了一种用于闭式给水加热器热分析的模型，其中湿蒸汽从蒸汽涡轮机中抽出（并通过管道输送到加热器中）。在流经蒸汽涡轮机的流体是湿蒸汽的情况下，该模型的应用与核电站诊断相关。目前，所有给水加热器的计算都是通过设定级除水效率来进行的，假设是从涡轮机流血的的蒸汽的质量流量和/或焓率为已知值。我们的模型能够检测多种故障，即使在控制室中可能已在较早的时间点记录了不准确的读数。此外，不需要立即进行现场检查，这在给水加热器位于高辐射剂量区域的沸水反应堆发电厂中是一个重要的优势。
A model is introduced for the thermal analysis of closed feedwater heaters in which wet steam is extracted from the steam turbine (and piped into the heater). Where the fluid flowing through the steam turbine is wet steam, application of this model is of relevance to nuclear power plant diagnostics. At present, all feedwater heater calculations are performed by setting thestage moisture removal effectiveness, on the assumption that the mass flows and/or the enthalpy rates of the steam bled from the turbine are known values. Our model enables detection of multiple malfunctions, even where inaccurate readings may have been registered in the control room at an earlier point in time. Furthermore, there is no immediate need for on-site inspection, which is an important advantage in Boiling Water Reactor Power Plants where feedwater heaters are placed in high radiation dose areas.