Taking several successful technological transformation cases on direct air cooling system recently as technical reference

five technological transformation plans are proposed

which focus on the questions at high temperature in summer such as high back-pressure and large coal consumption for power generation.The peak cooling system will distribute part of steam turbine exhaust and the ACC heat load reduces with the fixed cooling capacity of air cooling system.Or the capacity-increasing will improve the cooling capacity with the fixed heat load of cold end system.Technical plan of evaporative cooling technology combines heat exchanger and spray water cooling equipment together

which significantly saves space and simplifies system configuration

as well as shows extremely strong field operability.Taking a 600 MW indirect air cooling unit as an example

calculation of application effect is performed and change law of back-pressure drap effect with environmental temperature and load is obtained.For a fixed load

the effect decreases gradually with the ambient air temperature.For a fixed temperature

the effect drops gradually with the wnit load.