4.16 Steam production control system
The steam production control system (SPC) supplies the steam production of the ship with
exhaust gas, which has a higher temperature.
SPC is an optional system.
NOTE: The engine obeys the IMO NOx limits, with and without steam production.
Fig 4-43 Example of SPC
Legend
001 Engine 005 Steam production
002 Exhaust waste gate valve 006 Steam consumer
003 Steam production control system 007 Turbocharger
004 Stack
4.16.1 Function
The SPC controls the exhaust waste gate valve (002, Figure 4-43). If the exhaust waste gate
valve (EWG) opens, a part of the exhaust gas bypasses the turbocharger (007). As a result the
temperature of the exhaust gas increases, which is supplied to the steam production (005).
The supply of the turbocharger comes first, before the supply of the steam production.
The supply of the steam production is only permitted in the range between the minimum engine
load and the maximum bypass rate. These limits are related on the ambient conditions and are
project specific.
4.16.2 User interface on the LDU-20
If an SCR system is installed, the control for SPC is part of the SCR system.
If no SCR system is installed, the control for SPC has separate control boxes.
X92DF
AA00-9270-00AAA-043C-A
Operation Manual Steam production control system
Winterthur Gas & Diesel Ltd.
- 140 - Issue 002 2020-08
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