Jacket Water Cooling System Page 14 Flashcards
What is the purpose of the Main Coolers in a jacket water cooling system?
To remove heat from the system.
What is the function of the Circulation Pumps in a jacket water cooling system?
To circulate the water within the system.
What does the 3 Way Thermal Regulating Valve do?
It maintains a constant operational temperature and regulates the amount of water around the system.
What is the purpose of the De-Aerating Tank?
To remove oxygen bubbles, vapour, and gases from the system.
What is the role of the Circulating Pump?
To circulate water around the system at a certain pressure.
What is the function of the Pre-Heater?
To maintain the correct temperature of cooling water before it reaches the main engine (can be bypassed).
What does FWG do in a jacket water cooling system?
Creates water using waste heat from the main engine.
What chemical tests are carried out for jacket water cooling system treatment?
- Monitor and control the chemical pH of the jacket water to prevent corrosion.
- Check the concentration of chemical inhibitors to protect against corrosion and scale.
- Monitor chloride content to prevent corrosion.
What is the frequency of testing for the jacket water cooling system?
Weekly as per the planned maintenance schedule.
Why is it necessary to keep test results within certain limits?
To ensure safe and efficient operation of the engine while adhering to manufacturer specifications.
What action should be taken to rectify an abnormal test result?
Retest; if still abnormal, inform the chief engineer and administer the correct course of treatment following manufacturer guidelines.
Make a labelled diagram of the jacket water cooling system?
State the purpose of the main components in jacket water cooling system? (8)
- With reference to JW cooling system treatment of a diesel engine:
a) State the chemical tests carried out (6)
b) State the frequency of testing (2)
c) Explain why it is necessary to keep the test results within certain limits
d) State the action to be taken to rectify an abnormal test result (4)
(4)
a) The chemical PH of the jacket water is monitored and controlled in order to prevent acidic or caustic corrosion
The concentration of chemical inhibitors within the jacket water to protect against corrosion and scale
The chloride content of the water, to monitor and control its concentration to prevent corrosion
b) Weekly as per planned maintenance schedule
c) For the safe and efficient operation of the engine, whilst ensuring operation within manufacture specifications
d) Retest, if still abnormal inform the chief engineer, and following the manufactures guidelines administer the correct
course of treatment in
What does ph test in jacket water cooling system?
a) The chemical PH of the jacket water is monitored and controlled in order to prevent acidic or caustic corrosion
What ch…..cal in….ors are tested in a jwc system what do the help protect against? Hint CS
The concentration of chemical inhibitors within the jacket water to protect against corrosion and scale
What does the C content monitor and control in a jwc system and what does it prevent?
The chloride content of the water, to monitor and control its concentration to prevent corrosion
