Marine Installation Manual
2021-08
4-25
4 Ancillary Systems
4.3 Lubricating oil systems
X72DF
Electrical trace heating for system side cylinder lubricating oil piping
To ensure the correct cylinder lubricating oil temperature at engine inlet
(40+10/-5 °C), electrical trace heating is recommended to be applied. The ME
provides cabinet control box E86 for heating cable connection and power supply.
The heating cable together with the plug can be directly ordered from the engine
maker. The guided heating cable length is determined by the cylinder LO pipe
length and the engine type (see
).
Cylinder LO trace
heating cable
WinGD specifies the 10QTVR2-CT self-regulating heating cable for engine in
-
ternal and external cylinder LO piping. Detailed technical information about this
cable can be found in
.
To reach the required LO temperature of 40 +10/-5°C, the proper length of
heating cable must be selected for the engine and traced along the system side
piping spirally or in parallel, depending on the cable/pipe ratio (see
).
Figure 4
-
13 Trace heating cable arrangement
Considering the ME power, LO feed rate and environment condition, WinGD
specifies a minimum heating cable length ‘Lc’ as listed in the following table:
Table 4
-
3
Heating cable specification
Considering the system side cylinder LO pipe length ‘Lp’, the heating cable must
be longer than the lubricating oil pipe, i.e. ‘Lc’ > ‘Lp’.
NOTE
On the engine side, electrical trace heating is applied in the rail unit to
keep the cylinder lubricating oil within the required temperature range,
even during gas operation in cold areas.
No. of
cyl.
Min. heating cable length
‘Lc’ [m]
5
16
6
19
7
22
8
25
SM-0412
Pipe
Straight line pipe heating cable installation
Double parallel
heating cable
N = 2
N = 3 or more
N = 3 or more
Multiple parallel
heating cable
Spiral wrap pipe heating cable installation
Multiple spiral heating cable