MSSC GDMS-OMD14, User Manual

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GDMS-OMD14
®
User Manual
Release 160623
(revision 160704)
MSS
AG
Page 1.1
1.1. Components
1. System Description
1.1.1. GDMS-OMD14 Principle
The
GDMS-OMD14
is an advanced
oil mist detection system especially
constructed to meet the requirements
of large diesel and gas engines, like
ship engines or power plant engines.
While developing GDMS-OMD14
MSS AG has used the latest technical
knowledge and practical experience.
The issue of highly ignitable oil mist
produced when lubricants or fuel come
in contact with hot surfaces within the
engine has become one of the most
significant risks for engine builders
and operators. Mist concentration of
50 mg/l and higher is sufficient for an
explosion to occur, resulting in large-
scaled engine damages and in severe
cases in the loss of lives. The presence
of oil mist inside the engine can also
indicate a damage of sliding surfaces,
because the lubricant film can vapour in
areas where moving parts begin to rub against each other.
The main topics of oil mist detection are:
1. Prevention of larger damages in engines. If the oil mist is detected early, minimal
maintenance and repair works are often sufficient to solve the problem, allowing
to avoid high repair- and breakdown costs for the engine.
2. Protection of the engine against explosion. Before the concentration of oil mist
reaches the LEL, Lower Explosion Level (50 mg/l), the oil mist detector will trigger
an alarm.
GDMS-OMD14 is also capable of detecting water vapour. Due to water vapour,
corrosion on major parts inside the engine may occur which will damage the engine.
Oil mist detection systems are also part of rules applied world-wide which are
administered by the IACS, the International Association of Classification Society.
These rules are called UR, Unified Requirements, and oil mist detection systems
are part of UR M10 and UR M67. These Unified Requirements are realized and
used in the national rules of the Classification Societies, like the German Lloyd.
Fig. 1.1. Exemplary assembly of the GDMS-
OMD14 System
1 Evaluator
for up to 16
Sensors
1 - 16
Sensors
Inside the
engine