1. LESSON FOURTEEN

2. WATER COOLING SYSTEM

3. 1.HEAT SOURCES

4.  Burning of fuel

5. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air

6. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat

7. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION

8. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION  1/3 = converted into useful work ( transferred into mechanical energy / BHP.

9. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION  1/3 = converted into useful work ( transferred into mechanical energy / BHP.  1/3 = lost as exhaust gases

10. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION  1/3 = converted into useful work ( transferred into mechanical energy / BHP.  1/3 = lost as exhaust gases  1/3 = lost for cooling / absorbed by metallic walls of the combustion chamber.

11. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION  1/3 = converted into useful work ( transferred into mechanical energy / BHP.  1/3 = lost as exhaust gases  1/3 = lost for cooling / absorbed by metallic walls of the combustion chamber. 3. OVERHEATING

12. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION  1/3 = converted into useful work ( transferred into mechanical energy / BHP.  1/3 = lost as exhaust gases  1/3 = lost for cooling / absorbed by metallic walls of the combustion chamber. 3. OVERHEATING  Breakdown of L.O. film

13. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION  1/3 = converted into useful work ( transferred into mechanical energy / BHP.  1/3 = lost as exhaust gases  1/3 = lost for cooling / absorbed by metallic walls of the combustion chamber. 3. OVERHEATING  Breakdown of L.O. film  Loss in material strenght

14. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION  1/3 = converted into useful work ( transferred into mechanical energy / BHP.  1/3 = lost as exhaust gases  1/3 = lost for cooling / absorbed by metallic walls of the combustion chamber. 3. OVERHEATING  Breakdown of L.O. film  Loss in material strenght  Excessive stresses due to unequal temperatures

15. 1.HEAT SOURCES  Burning of fuel  Heat developed by compression of air  Frictional heat 2. HEAT DISTRIBUTION  1/3 = converted into useful work ( transferred into mechanical energy / BHP.  1/3 = lost as exhaust gases  1/3 = lost for cooling / absorbed by metallic walls of the combustion chamber. 3. OVERHEATING  Breakdown of L.O. film  Loss in material strenght  Excessive stresses due to unequal temperatures  Faliure to maintain proper clearances between running parts.

16. 4. COOLANTS

17.  Fresh water

18. 4. COOLANTS  Fresh water  Luboil

19. 4. COOLANTS  Fresh water  Luboil 5. COOLING WATER TEMPERATURE

20. 4. COOLANTS  Fresh water  Luboil 5. COOLING WATER TEMPERATURE 5.1 The temperature should be kept as high as possible.

21. 4. COOLANTS  Fresh water  Luboil 5. COOLING WATER TEMPERATURE 5.1 The temperature should be kept as high as possible. 5.2 If to high, it will cause boiling of water and formation of scale deposits ( incrustration )

22. 4. COOLANTS  Fresh water  Luboil 5. COOLING WATER TEMPERATURE 5.1 The temperature should be kept as high as possible. 5.2 If to high, it will cause boiling of water and formation of scale deposits ( incrustration ) 5.3 If to low, it will lead to condensation of combustion gases on the liner surfaces.

23. 4. COOLANTS  Fresh water  Luboil 5. COOLING WATER TEMPERATURE 5.1 The temperature should be kept as high as possible. 5.2 If to high, it will cause boiling of water and formation of scale deposits ( incrustration ) 5.3 If to low, it will lead to condensation of combustion gases on the liner surfaces. 5.3.1 Product of condensation may:

24. 4. COOLANTS  Fresh water  Luboil 5. COOLING WATER TEMPERATURE 5.1 The temperature should be kept as high as possible. 5.2 If to high, it will cause boiling of water and formation of scale deposits ( incrustration ) 5.3 If to low, it will lead to condensation of combustion gases on the liner surfaces. 5.3.1 Product of condensation may:  contain acids causing corrosion

25. 4. COOLANTS  Fresh water  Luboil 5. COOLING WATER TEMPERATURE 5.1 The temperature should be kept as high as possible. 5.2 If to high, it will cause boiling of water and formation of scale deposits ( incrustration ) 5.3 If to low, it will lead to condensation of combustion gases on the liner surfaces. 5.3.1 Product of condensation may:  contain acids causing corrosion  cause so called cold sludge in the L.O. increasing wear in all moving parts

26. 6. COOLING WATER TREATMENT & CONSEQUENCES

27.  If the cooling water is not properly treated, the closed cooling systems may undergo fouling, formation of deposits ( preventing or disturbing the heat transfer ). The deposit consists of loose sludge and solid particles.

28. 6. COOLING WATER TREATMENT & CONSEQUENCES  If the cooling water is not properly treated, the closed cooling systems may undergo fouling, formation of deposits ( preventing or disturbing the heat transfer ). The deposit consists of loose sludge and solid particles.  Removal: mechanically ( first brushed or rinsed off with water ) or chemically.

29. 6. COOLING WATER TREATMENT & CONSEQUENCES  If the cooling water is not properly treated, the closed cooling systems may undergo fouling, formation of deposits ( preventing or disturbing the heat transfer ). The deposit consists of loose sludge and solid particles.  Removal: mechanically ( first brushed or rinsed off with water ) or chemically.  Narrow spaces are chemically cleaned.

30. 6. COOLING WATER TREATMENT & CONSEQUENCES  If the cooling water is not properly treated, the closed cooling systems may undergo fouling, formation of deposits ( preventing or disturbing the heat transfer ). The deposit consists of loose sludge and solid particles.  Removal: mechanically ( first brushed or rinsed off with water ) or chemically.  Narrow spaces are chemically cleaned.  Limestone deposits can be cleaned with acid solution.

31. 6. COOLING WATER TREATMENT & CONSEQUENCES  If the cooling water is not properly treated, the closed cooling systems may undergo fouling, formation of deposits ( preventing or disturbing the heat transfer ). The deposit consists of loose sludge and solid particles.  Removal: mechanically ( first brushed or rinsed off with water ) or chemically.  Narrow spaces are chemically cleaned.  Limestone deposits can be cleaned with acid solution. 7. WATER COOLING SYSTEMS

32. 6. COOLING WATER TREATMENT & CONSEQUENCES  If the cooling water is not properly treated, the closed cooling systems may undergo fouling, formation of deposits ( preventing or disturbing the heat transfer ). The deposit consists of loose sludge and solid particles.  Removal: mechanically ( first brushed or rinsed off with water ) or chemically.  Narrow spaces are chemically cleaned.  Limestone deposits can be cleaned with acid solution. 7. WATER COOLING SYSTEMS  Large slow speed, two stroke engines have 2 separate closed cooling circuits.

33. 6. COOLING WATER TREATMENT & CONSEQUENCES  If the cooling water is not properly treated, the closed cooling systems may undergo fouling, formation of deposits ( preventing or disturbing the heat transfer ). The deposit consists of loose sludge and solid particles.  Removal: mechanically ( first brushed or rinsed off with water ) or chemically.  Narrow spaces are chemically cleaned.  Limestone deposits can be cleaned with acid solution. 7. WATER COOLING SYSTEMS  Large slow speed, two stroke engines have 2 separate closed cooling circuits.  A header or expansion tank allows venting of the system. The header has connections from engine discharge & pump suction line.

34. 6. COOLING WATER TREATMENT & CONSEQUENCES  If the cooling water is not properly treated, the closed cooling systems may undergo fouling, formation of deposits ( preventing or disturbing the heat transfer ). The deposit consists of loose sludge and solid particles.  Removal: mechanically ( first brushed or rinsed off with water ) or chemically.  Narrow spaces are chemically cleaned.  Limestone deposits can be cleaned with acid solution. 7. WATER COOLING SYSTEMS  Large slow speed, two stroke engines have 2 separate closed cooling circuits.  A header or expansion tank allows venting of the system. The header has connections from engine discharge & pump suction line.  A heater is fitted with by pass to warm the engine when necessary.

35.  Cylinder jacket system

36. Water → lower end of the jacket → cylinder cover → exhaust valve cages → turbocharger → turbine cooling spaces → air separator → main discharge.

37.  Cylinder jacket system Water → lower end of the jacket → cylinder cover → exhaust valve cages → turbocharger → turbine cooling spaces → air separator → main discharge.  The piston cooling system

38.  Cylinder jacket system Water → lower end of the jacket → cylinder cover → exhaust valve cages → turbocharger → turbine cooling spaces → air separator → main discharge.  The piston cooling system Water → piston cooling tank → piston water cooler → piston cooling connections → return by gravity to supply tank