TITLE:
Diagnosis of Thermal Overload and Power Losses in Boat Yang 1’s CAT 3408 Marine Diesel Engine from Used Oil and Coolant Analysis
AUTHORS:
Maurice Vanlie Kontchou, Théophile Emakoua, Achille Njomoue Pandong
KEYWORDS:
Reporting, Reasons, Thermal Overload, Power Losses
JOURNAL NAME:
Modern Mechanical Engineering,
Vol.12 No.3,
August
29,
2022
ABSTRACT: In the design of the CAT 3408 engine, the Low Temperature (BT) circuits
used to cool the engine lubricating oil and the charge air and the High
Temperature (HT) circuits for cooling the cylinder liners, cylinder heads and
body of turbofans are mainly used to cool the engine, so that it works
properly. This work, based on the analysis
carried out, to determine the lubrication compliance of the Yacco VX 100
- SAE 15 W-40 oil and that of the Camwater water used in the engine of the Boat
Yang 1 by carrying out a series of conventional tests such as that: the
density, the viscosity, the viscosity index, the flash point, the density, the
sulphate center content, the water content, the total acidity index (TAN),
total basic number (TBN) and pour point for the oil case and pH, hardness,
sodium chloride content [NaCl], sodium sulphate content [NaSO4] for
the water case which will be compared to the specified requirements to
determine whether compliance is achieved for each of these characteristics. The
results of the oil and water samples taken from the engine after use show that the used oil gives a specific
gravity of 0.8822, a viscosity (at 40°C) of 92.29 mm2/s, a viscosity
(at 100°C) of 13.99 mm2/s, a viscosity index (VI) of 155.39,
a pour point -21°C, a Flash Point (VO) 215°C, a Sulfated ash content of 18%, a
density 881.5 kg/m3, a total basic number (TBN) of 12.60 mgKOH/g, a
Total Acid Index (TAN) of 3.096 mgKOH/g, a Water Content of 1.8 % and the water
used gives a pH of 6.00, a hardness of 3.2 french degrees, a sodium chloride
content [NaCl] of 0.468 mg/L, and a calcium sulphate content [CaSO4]
of 2.38345 mg/L. the results of the water content and content of sulfated
centers justify the thermal overload and power losses in the marine diesel
engine CAT 3408 of the boat Yang 1 because of their values which are not in
conformity with the standards.