Industries that use equipments or machines in its production process certain need cooling for the machines. Cooling is used to maintain the performance of the machines and make them long lived. Usually, cooling is done by water as a coolant. Production quality of industry is depend on its production machines performance, while production machines performance is determined by cooling system of the machine.
PT. Kaltim Parna Industry use sea water as coolant in its production process because of the location that near the sea. Besides PT. Kaltim Parna Industry, other industries circumjacent it also use sea water in their production process, so then sea water temperature increase. Therefore, PT. Kaltim Parna Industry use Sea Water Cooling Tower in its system in order to prevent efficiency descent as a result of increasing temperature of sea water as a coolant.
In this research, a centrifugal pump which is used for circulating sea water in Sea Water Cooling Tower is designed, so highly expected that the efficiency of the system will not decrease because sea water which is used as a coolant is cold sea water after circulated at Sea Water Cooling Tower.
This designed sea water circulation pump is a double suction centrifugal pump which has capacity 2,5 lt/s and total head 47 m. This pump use impeller which outside diameter (d2) is 1019 mm, impeller eye diameter (d1) is 633 mm and it has 9 blades. Specific speed (nsq) of pump impeller is 36,748. Prime mover of this pump is an induction motor with 590 rpm rotation and power 2000 HP. From this design is obtained total pump efficiency 89% and pump characteristic is good enough and filled the bill.
Keyword : pump, circulation, sea water
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