Optimal Operation Mode of a Dual-pressure Condenser Closed Type Circulating Water System

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.