Research Of Unit Economical Performance For Direct Air-cooled System In Power Plant

This paper forcused on effecting factors of direct air cooling system, off-design character of direct air cooling system, and drawed the off-design characteristic curve of air-cooled condenser through the mathematic model of direct air-cooled condenser off-design; this paper analysised the influence of coal consumption rate for variable back pressure's applying equivalent heat drop theory, associate the coal consumption rate with the net coal consumption rate and establish the relation back pressure and the net coal consumption rat of direct air cooling system through unit anxiliary supply transformation codfficient,this paper summarize the evaluation architecture of direct air cooling system and put forward the computing methods of the related parameter reference value in the mentioned above evaluation architecture through the reference value diagnosis method and the four-order power index evaluation system,which give evidence for safe and economical running and analyzing the economical property of direct air cooling unit.