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The Study and Design of Cooling Water Temperature Control System of Marine Diesel Engine

Author: ZhangLiWen
Tutor: ZhaoDianLi
School: Dalian Maritime University
Course: Marine Engineering
Keywords: Marine Diesel Engine Cooling water temperature Fuzzy Control Matlab simulation PLC
CLC: U664.121
Type: Master's thesis
Year: 2010
Downloads: 298
Quote: 0
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Abstract


Inertia as a main propulsion marine diesel engine power plant with a large , multi-variable, multi-output , complex operating conditions , their working conditions have a direct impact to the ship and personal safety as well as the ship operating profit . Marine diesel engine cooling water temperature is an important influence on the engine thermal parameters , precise control of the temperature of the cooling water , are of great significance for improving the diesel power to reduce the generation of waste gas to reduce fuel consumption . Diesel engine cooling water temperature is too high , will accelerate the aging of the lubricant , and accelerated wear of the parts ; diesel engine cooling water temperature is too low ( 30 ° C or less) , the acid radical in the gas combines with water to acids , increased wear of the cylinder . A direct impact on the working condition of the diesel engine cooling water temperature control . However , due to the cooling water heat transfer process and the system piping delay so that the change in temperature of the cooling water having a long delay characteristics of large inertia , combined with the complexity of the marine diesel engine operating condition of the regulation to a temperature of a ship diesel brought Great difficulty , cooling water temperature often overshoot. Papers for marine diesel engine cooling water temperature inertia , long time delay , easy to overshoot characteristics , in -depth study of marine diesel engine high temperature cooling control system model based on the thermodynamic model and the temperature of the water system . Two feedforward fuzzy controller based feedforward control theory using MATLAB simulation software to design and control the effect of simulation comparison test . The results show that the introduction of the feed-forward fuzzy control the speed of the system after the control link with the anti- disturbance ability improved significantly . Cooling water temperature control system in order to improve the reliability of marine diesel engine cooling water temperature control system as well as control the effect of fast and accurate , the article has designed a new type of marine diesel engine based on PLC S7-200 , feedforward fuzzy control functions , automatically and manually run two operating modes , with the man-machine interface , high and low temperature alarm system parameters are set and modify .

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CLC: > Transportation > Waterway transport > Marine Engineering > Ship machinery > Ship power plant > Internal combustion engine power plant > Diesel engine
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