Abstract:

To study the 600MW direct air cooling unit backpressure economical operation, backpressure chocking was calculated by adopting equivalent heat drop principle. By adopting the steam turbine power net increment method to calculate the different load is obtained under different environmental temperature, air cooling fan frequency curve and the fitting formula of economic operation, for the economic operation of the same kind of direct air cooling unit to provide the reference.

Key words:

direct air cooling unit, backpressure chocking, backpressure correction curve, equivalent heat drop principle, economic frequency