The total installation capacity of large air-cooling units during the"10th-5-year-plan"is 4 600 MW,and to"11th-5-year-plan"will be 33 600 MW.

In a period of time after putting the direct air cooling unit into operation,the silicon content in steam and water fails to reach the set standard,leading to scalling of silicon and silicate in the steam turbine,affecting the efficiency of unit.

Combined with real situation of air cooling units in Huadian Ningxia Lingwu Power Generation Co Ltd,the frost-cracking problem occurred in direct air cooling system under severe cold circumstances has been analysed,and counter measures for preventing frost-cracking being put forward.

Application of powder-resin pre-coated filter in air-cooling unit;

Analysis on the high content of dissolved oxygen in condensate of 220 MW air-cooling unit;

At first,the development course of direct/indirect air-cooling unit in coal-fired power plants has been introduced.

Study on necessity and feasibility to promote the development of air-cooled units in coal-rich regions;

Aiming at characteristics of air-cooled units,and on the basis of researches on mega-watt water cooling units,design ideas of 1 000 MW air-cooled units are proposed.