FLOW RATE CONTROL SYSTEM OF CIRCULATING PUMP AND FLOW RATE CONTROL METHOD OF CIRCULATING PUMP

摘要

PROBLEM TO BE SOLVED: To provide a system for controlling a circulating pump so that a temperature difference between an intake and a water discharge port does not exceed a pollution prevention agreement value in a cooling system utilizing seawater as cooling water. SOLUTION: In this system 20 for controlling a discharge flow rate of the circulating pump 11, seawater is taken in from the intake 12 by the circulating pump 11, the taken seawater is utilized as cooling water, and the seawater already utilized as the cooling water is discharged to the sea from the water discharge port 14. The system 20 includes: a sea level measuring part 22 for measuring a sea level in the vicinity of the intake 12; and a flow rate control part 21 for increasing the discharge flow rate of the circulating pump 11 when the measured sea level is not higher than a preset lower limit sea level. COPYRIGHT: (C)2009,JPO&INPIT