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中文摘要：
以某600MW机组闭式循环水系统为例，提出了以汽轮机负荷、环境温度和环境相对湿度为条件的优化运行方式，将冷却塔、凝汽器和汽轮机变工况进行耦合，得到了闭式循环水系统冷却塔的进塔水温和出塔水温（即凝汽器循环水的出口温度和入口温度）随机组负荷、环境温度和环境相对湿度的变化规律．结果表明：在一定的环境条件和负荷下，进塔水温随循环水体积流量的增大而降低，而出塔水温随循环水体积流量的增大而升高；进塔水温和出塔水温均随着环境温度、环境相对湿度和机组负荷的升高而升高．
英文摘要：
Taking the closed circulating water system of a 600 MW power unit as an example, an optimized operation mode was proposed based on the load of steam turbine, the ambient temperature and the relative environment humidity, while a variation law obtained about how the inlet/outlet water temperature of cooling tower in the closed circulating water system （i. e. the outlet/inlet temperature of condenser） change with the unit load, ambient temperature and relative environment humidity by coupling variable conditions of the cooling tower, condenser and turbine.. Results show that with the rise of circulating water flow, the inlet temperature of cooling tower reduces, but the outlet temperature of cooling tower increases, under a certain environmental condition and load; both the inlet/outlet temperature of cooling tower increase with rising ambient temperature, relative environment humidity and unit load.
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