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中文摘要：
循环水入口温度是决定循环水泵最优运行方式的重要参数。对于开式循环水系统来说,循环水入口温度即环境温度;但对于闭式循环水系统来说,循环水入口温度为冷却塔出塔水温。以逆流式冷却塔为研究对象,结合冷却塔热平衡计算方程式,通过迭代计算的方法确定出了循环水泵在不同运行方式时的冷却塔出塔水温,同时提出了入塔风速的软测量方法,而此前文献都是通过空气动力计算来获得入塔风速的。针对出塔水温和入塔风速在计算过程中存在的非线性方程多解问题,作了详细探讨,并最终确定了其符合物理意义的真实解。最后,将其应用到双压凝汽器中,由此得出的循环水泵最优运行方式对现场具有一定的指导意义。
英文摘要：
Circulating water inlet temperature is regarded as an important parameter for determining the optimal operation mode of a circulating water pump.For an open type circulating water system,the circulating water inlet temperature represents the ambient temperature.For a closed type one,however,it denotes the cooling tower outlet water temperature.With a counterflow type cooling tower serving as an object of study,in combination with the heat balance calculation formulae for a cooling tower and by adopting an iterative calculation method,the tower outlet water temperatures under different operation modes were determined.In the meantime,a soft method for measuring the tower ingoing air speed was presented.In the earlier literatures,however,the tower ingoing air speed was invariably obtained by an aerodynamic calculation.The problem concerning the multiple solutions to the nonlinear equation in the calculation of the tower outgoing water temperature and ingoing air speed was expounded.A real solution coincident with the physical meaning was finalized.At last,the solution such obtained was applied in the dual-pressure condenser.The optimal operation mode obtained therefrom for the circulating water pumps can serve as a guide for on-site operations.
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