The Modified Iteration Method for Wet Cooling Towers to Calculate the Cooled Water Outlet Temperature

Wet cooling towers are commonly used in thermal power stations to cool the condenser feed water. The temperature of cooled condenser feed water, which reflects the performance of cooling towers, has a great influence on steam turbine back-pressure and generation efficiency. Merkel Enthalpy Potential Equation is widely used to calculate the temperature of cooled condenser feed water. It is known to all that there is only one true value in nature; however, several solutions according with the equation appears. This paper provides the method to identify the true value of condenser feed water from several solutions, and finally puts forward its iteration calculating method, including the determination of the initial value and stopping rules.