关键词: 中央冷却水系统, 变频电机, 离心泵, 比例-积分-微分, 微机, 优化设计

Abstract: The major energy consumption equipment in the ship central cooling system is the seawater cooling pump. It introduces the influence of the seawater cooling pump that adopt two different control methods, the variable frequency technology combined with the proportional integral derivative (PID) control and the microcomputer principle control, on the central cooling system from the viewpoint of the electrical energy saving by analyzing the energy consumption of the traditional central cooling system. A more practical central cooling system is selected by comparing the two systems. It is proved that the application of the variable frequency technology on the seawater pump is important in reducing the operating energy consumption and improving the economy.

Key words: central cooling system, variable frequency motor, centrifugal pump, proportional integral derivative (PID), microcomputer, optimization design