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Energy-saving control system and method for ship sea water pumps

An energy-saving control system, sea water pump technology, applied in the controller with specific characteristics, electric controller, temperature control using electric mode, etc. complex issues

Inactive Publication Date: 2017-09-22
SHANGHAI CSR HANGE SHIPPING ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complexity of the circuit, the excessive impact of the starting current on the power grid, and the difficulty of maintenance, the flow and pressure at the outlet of the seawater pump are unstable, and the hydraulic impact on the seawater outlet pipeline and plate cooling will affect the system.

Method used

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  • Energy-saving control system and method for ship sea water pumps

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] figure 1 It is a structural diagram of the energy-saving control system of the marine seawater pump of the present invention.

[0020] Such as figure 1 As shown, in this embodiment, the energy-saving control system for marine seawater pumps includes four seawater pumps 100 , a control unit 200 and a temperature sensor 300 .

[0021] Each seawater pump 100 includes: a branch circuit breaker d, a frequency converter VFD, a contactor K, a thermal relay J and a motor M. The frequency converter VFD is connected to the circuit breaker DD of the main circuit through the branch circuit breaker d to receive electric energy. The frequency converter VFD is connected with the motor M through the contactor K, and controls the running speed of the motor through the frequency. The thermal relay J is connected in parallel at both ends of the VFD of ...

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Abstract

The invention provides an energy-saving control system and method for ship sea water pumps. The sea water pumps are driven by adopting frequency converters, one sea water pump is in the running state, and the other sea water pumps are in the standby state; a temperature sensor is arranged at a cooling fresh water outlet and detects the real-time temperature of the cooling fresh water; a control unit presets the rated temperature; the control unit judges whether the real-time temperature is larger than the rated temperature or not; when the real-time temperature is larger than the rated temperature, the control unit controls the frequency converter of any sea water pump to increase the running frequency. The energy-saving control system and method have the advantages that the performance is excellent, the control mode is flexible, the anti-jamming capability is high, work is stable and reliable, and the full-automation unattended operation is achieved; lossless water pump motor rotating speed regulation is achieved, stepless regulation of the water flow from zero to the maximum is achieved, and the system works in the best energy-saving state all the time.

Description

technical field [0001] The invention relates to an energy-saving control system and method, in particular to an energy-saving control system and method for marine seawater pumps. Background technique [0002] Seawater pumps provide seawater for cooling fresh water, and fresh water is used for cooling marine equipment, which makes full use of the cooling capacity of seawater. The surface temperature of seawater also varies greatly (4-30°C); the design parameters of the main seawater cooling pump all take into account the limit design (seawater temperature 32°C), and a certain margin is left, resulting in large redundancy. The seawater pump provides seawater as a cooling medium to enter the cooler to exchange heat with fresh water. The energy-saving effect is remarkable, and the motor can realize a real soft start, which reduces the hydraulic impact and wear on the seawater pipeline, regulating valve, and plate cooling, makes the operation of the system safer and more reliabl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05D23/19G05B11/42
CPCG05D23/19G05B11/42
Inventor 祁世科
Owner SHANGHAI CSR HANGE SHIPPING ENG
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