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分析了启动工况下再热器壁温计算公式的优劣,选取了适合该工况的计算公式,通过模拟计算得出各级再热器壁温同再热器进口压力之间的关系曲线及其变化规律,讨论了机组启动参数对各级再热器的影响,提出适当提高机组启动参数可以较为有效地避免再热器管壁超温。
The advantages and disadvantages of the calculation formula of reheater wall temperature under starting condition are analyzed. The calculation formula suitable for this condition is selected. The curve of the reheater wall temperature with the inlet pressure of the reheater is obtained by simulation The influence of starting parameters on the reheaters at all levels is discussed. It is pointed out that raising the starting parameters properly can avoid overheating of reheater tubes.