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Dual-mode switching method for pump flow mode and self-flow mode of ship cooling system

A cooling system and mode switching technology, which is applied in ship propulsion, ship parts, ship construction, etc., can solve the problem of unstable system operation and achieve the best effect of noise reduction

Active Publication Date: 2021-04-09
WUHAN SECOND SHIP DESIGN & RES INST
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Problems solved by technology

However, since the cooling seawater temperature t in different sea areas varies, the artesian speed zone v 1 -v 2 It is and will be changed. The timing of switching from the self-flowing mode cooling system to the pumping mode cooling system needs to be dynamically grasped, and it is necessary to ensure that the vacuum always meets the requirements during the conversion process, and reciprocating switching near the conversion point cannot occur. Otherwise, the system will will not run stably

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  • Dual-mode switching method for pump flow mode and self-flow mode of ship cooling system

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[0025]In order to make the objectives, technical solutions and advantages of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely intended to illustrate the invention and are not intended to limit the invention. Further, the technical features according to each of the various embodiments described below can be combined with each other as long as they do not constitute a collision between each other.

[0026]Referfigure 1 As shown, it is a structural diagram of the embodiment of the cooling system of the present invention, including a steam turbine, a condenser, a water pump, and the steam passes through the steam turbine, and the formed, the formed, which flows into the condenser, the water pump to transport seawater to the condenser, so Concatentle with cavitation is formed.

[0027]The dual mode switching method of ...

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Abstract

The invention discloses a dual-mode switching method for a pump flow mode and a self-flow mode of a ship cooling system, which comprises the following steps of: 1) determining the required vacuum of a condenser of the cooling system, which is expressed by pressure; 2) setting a vacuum value pref as an identifier of a pump flow mode and an automatic flow mode; 3) designing starting and quitting rules of a pump flow mode; when the detected vacuum value in the condenser is greater than a set value and is kept for more than N sampling periods, the cooling system keeps a pump flow mode or is switched from a self-flowing mode to the pump flow mode; and when the detected vacuum value in the condenser is smaller than the set value and is kept for more than N sampling periods, the cooling system keeps a self-flowing mode or is switched from the pump flow mode to the self-flowing mode. Two switching modes are provided, the requirement for maximization of a self-flowing navigational speed interval or the optimal vacuum environment is met, the performance requirements for the optimal energy-saving and noise-reducing effects and the optimal operation vacuum environment can be met respectively, and implementation of multi-target operation of the cooling system is facilitated.

Description

Technical field[0001]The present invention belongs to the field of ship power devices, and more particularly to a dual mode switching method of a pump flow mode and a self-flow mode of a ship cooling system.Background technique[0002]The condensed steam turbine is a power system of the ship. Its cooling water system is one of the most important subsystems, which is used to condense the fed steam produced by the steam turbine to maintain the vacuum conditions required for steam turbine. Self-flow mode cooling system is a novel cooling water system, which is different from the traditional pump flow mode cooling water system, and its work does not rely on the operation of the water pump, comparing energy saving, and can significantly reduce the noise of the cooling water system, which is the ship power unit cooling water. The important development direction of the system. Such asfigure 1 As shown, the autofing mode cooling system is typically composed of an inlet takeover and a guide co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63H21/38
CPCB63H21/383
Inventor 李献领柯志武陶模陈朝旭冯毅郑伟周宏宽刘伟姚涌涛代路吴君李勇柯汉兵魏志国戴春辉
Owner WUHAN SECOND SHIP DESIGN & RES INST
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