- The Vib360 condition monitoring system was installed on Engine 4 of the vessel to identify problems and monitor the real-time health of the asset.
- MPU sensors were installed on the flywheel to monitor the crank speed signal and TDC signal.
- The system was used to perform an analysis before and after overhaul, at 65% load
CASE STUDY
Fuel Inefficiencies Accurately PinPointed On a CAT 3516 C HD Engine On Board an Offshore Jack Up Rig with an engine condition monitoring system by Neptunus
Background
Maintenance is essential for the continual operation of an offshore oil rig and involves regular inspections, repairs, and upgrades. By monitoring the condition of the rig’s engines, operators are able to identify potential problems before they become serious.
Industry Segment
Oil & Gas
Arm Solution
Engine Condition Monitoring System
Equipment
Oil Rig Diesel Engine
Objectives
Check the accuracy of our system to provide information about the engine’s overall mechanical and operational state as well as test its capability to pinpoint faults, if any, within the engine.
Highlights Of Our Product
Engine
Agnostic
The System Uses Two Non-Invasive MPU Sensors.
The Sensors Requires Once-In-A-Lifetime Calibration.
Pin-point existing And Emerging Faults At The Component level
Remote Monitoring of all Assets Under a Single Central Command
Scientifically Extend Overhaul Intervals with Significant Cost Savings
Easy To Install And Operate
Evaluation Process
Discovery/Insights from Our System
- Before TOH, our system indicated that although the condition of the crankshaft & injectors was satisfactory, there were issues in the injection timing & compression (especially in units R5, L4, R9 & R13)
- After TOH, as expected the mechanical health improved from 70% to 100% post-TOH indicating the engine is healthy & operating optimally.
- Our engine condition monitoring system indicated that the power loss factor has been improved from 1.51% before overhauling to 0.66% after overhaul indicating significant fuel savings.
- Operating condition, Injection timing & compression indicators are at an optimum level indicating that the engine is running at optimum fuel efficiency.
- Data from our system co-related with the operating parameters of the engine
Before And After Overhauling Summary
| PARAMETERS | BEFORE OVERHAUL | AFTER OVERHAUL |
|---|---|---|
| Mechanical health | 70 | 100 |
| Operating condition | 55 | 99 |
| Mechanical stress | 100 | 100 |
| Mounts | 88 | 83 |
| Torsional angle | 100 | 100 |
| Harmonic damper | 83 | 84 |
| Power loss | 1.51 | 0.66 |
| Compression issues | R5-L4-R9-R13 | NIL |
| Injection timing issues | L2-L4-L6-L15-L8 | NIL |
Conclusion
The system can be used as a mechanism to identify fuel loss.
It is a reliable tool to defer unnecessary maintenance action.
The system helps to accurately to pin-point issues of any rotating machines