The system is required because various industrial process plants uses heat exchanger, and also for active fire protection measures.
In chemical plants, for example in caustic soda production, water is needed in bulk quantity for preparation of brine.
CW pumps are designed as per IS:9137,[2][3] standards of the Hydraulic Institute, USA or equivalent.
Some coastal power stations or chemical plants intake water from sea for condenser cooling.
Selection of type of system is based on the thermal pollution effect on sea water and techno-economics based on the distance of power station from the coast and cost of pumping sea water.