ID fans in operating power plants are always driven by electromotor

while the increasing capacity of the electromotor will cause higher service power consumption rate.So

this paper compares the technical and economic difference between different driven ways for ID fans(by steam turbine or electromotor)

and also discusses the economical efficiency and energy consumption of the steam turbine driven ID fans.Newly built generator units will have lower initial investment and easier operation maintenance by adopting the electromotor to drive ID fans.However

using steam turbine to drive can decrease the service power consumption rate

and avoid the impact of motor starting current on auxiliary power system.For the retrofitted units which change electromotor driving into steam turbine driving

it should be checked whether the parameters of following systems can satisfy the turbine driven requirements

such as boiler

main steam turbine

condensate system

extraction steam system

auxiliary steam system and circulating water system etc.Steam turbine driven ID fans adopted on either newly built or retrofitted units both have certain economic advantages

but only under low unit loads.