The vacuum value in condenser is closely related to safety and economic efficiency of the steam turbine unit

through cause analysis of low vacuum in operation of unit no.7 in Yangzhou Power Generation Co Ltd

it is believed that the main factors affecting low vacuum in operation of said unit are as follows:smaller total heat exchange coefficient of the condenser;lower flow rate of the cooling water;and abnormal operation of the air-extracting system

etc..For these

effective ways and solving measures for enhancing the vacuum

such as retrofitting the circulating water pump

and descaling from tubes in condenser

etc.have been put forward.Through implementation of the retrofit scheme

the vacuum in operation of said condenser has been enhanced by 4 kPa.