For reducing the energy consumed in a pharmaceutical plant,this article obtains the energy flow diagram from the energy consumed in every workshop firstly.The primary energy mainly consist of coal and electricity.They get steam and chilled water from the energy conversion devices(boilers and refrigerating machines).The steam is used to produce the distilled water and the secondary steam.The distilled water,the secondary steam and the electricity used by the production lines are linearly related to the amoun...