RE: POSSIBLY the Panama trial just started today28 Jul 2025 14:00
Guidance on running the MAN engines used by Sparkle at anything less than full load is very specific. This is due to deposits building up and then the engines needing run down times In order to burn off deposits which vary if they are run on hfo or diesel. It's going to be very difficult to gather anything meaningful from them being switched on or not as there are so many variables even in normal operations from start up procedures to warm down and wether they have been on standby or not.
For example:
Full load (MCR): 100% (MCR) of the engine output
Part load: < 100% (MCR) of the engine output
Low load: < 25% of the engine output
Correlations The best operating conditions for the engine prevail under even loading in the
range of 60% to 90% of full load.
During idle or no-load operation, combustion in the combustion chamber is
incomplete.
This may result in the forming of deposits in the combustion chamber, which
will lead to increased soot emission and to increases in deposits.
Low-load operation
Operation with heavy fuel
oil (fuel of RM quality) or
with MGO (DMA, DFA) or
MDO (DMB, DFB)
Based on the above, the low-load operation in the range of < 25 % of the full
load is subjected to specific limitations. According to figure Time limitation for
low-load operation (left), duration of "relieving operation" (right), Page 43 im-
mediately after a phase of low-load operation the engine must be operated at
> 70 % of the full load for some time in order to reduce the deposits in the cyl-
inders and the exhaust gas turbocharger again.
▪ Provided that the specified engine operating values are observed, there
are no restrictions at loads > 25 % of the full load.
▪ Continuous operation at < 25 % of the full load should be avoided
whenever possible.
▪ No-load operation, particularly at nominal speed (alternator operation) is
only permissible for one hour maximum.
After 500 hours of continuous operation with liquid fuel, at a low load in the
range of 20 % to 25 % of the full load, the engine must be run-in again.