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2-S Dual-Fuel Engine Safety Concept

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2-S Dual-Fuel Engine Safety Concept ENGINE SAFETY CONCEPT 2-S Dual Fuel engines Prod. N mhu019 M mhu019 dst009 18.03.2021 EAAD096298 X-DF, DG9727 3 2 L mhu019 dst009 12.02.2021 EAAD096059 X-DF, DG9727, DF Safety Concept 4 3 ange History Ch - tzi003 sgo015 11.12.2013 Rev. Creator Approver Approval Date Change ID Change Synopsis Activity Code E C ENGINE SAFETY CONCEPT 2-S Dual Fuel engines PC-Drawing Copyright Winterthur Gas & Diesel Ltd. All rights reserved. By taking possession of the document the recipient recognizes and honours these rights. Neither the whole nor Design Group 9727 Q-Code XXXXX any part of this document may be used in any way for construction, fabrication, marketing or any other purpose nor Document PC copied in any way nor made accessible to third parties without A4 ID Page/s 1/66 the previous written consent of Winterthur Gas & Diesel Ltd. DAAD046594 Document ID: DAAD046594 Revision: N Date: 21.07.2021 -Rev Date Made Appd Description A 2014-06-27 SAR SGO Major amendments B 2014-09-08 SAR SGO Updates C 2015-06-18 SAR SGO Updates Updates based on class comments. Focus of D 2016-05-10 JGA SGO safety measures on use of natural gas as fuel E 2017-02-08 HHU SGO Fuel sharing and Dynamic Combustion Control General updates and clarifications F 2017-11-09 TFL SGO Document structure and format updated G 2018-10-09 JGA WOS Updates due to introduction of the iGPR Changes to failure monitoring and actions H 2019-06-26 JPI CCO inerting gas system change I 2020-01-17 JGA DST Updates due to design changes of the iGPR Addition of the manual shut-off valve (located J 2020-08-11 CTU DST next to the master gas fuel engine valve) Updates to the auxiliary blower installation K 2020-11-05 CTU DST requirements and the description of fuel mode transfers and trips L 2021-02-12 JGA DST Addition of the iCER system M 2021-03-04 CTU DST General clarifications of operating modes N 2021-07-30 CTU DST iCER diesel Tier III option added Revision Reference Description Revision: N 2.1 Figure 2-1 and Figure 2.2 updated Date: 2021-07-30 2.2.4.2 Figure 2-13 updated 2.5.2, 2.5.3 iCER diesel Tier III mode operation added 2.5.3 iCER multi turbocharger execution added 3.5.3 Section updated 5.4 Table 5-3 and Table 5-5 updated (exhaust gas sensors) T_PC-Drawing_Portrait Release: 3.02 Page 2 of 66 (22/06/2021) Document ID: DAAD046594 Revision: N Date: 21.07.2021 Table of Contents 1 Introduction ................................................................................................................................................................. 9 2 Description of the X-DF engine and related systems .............................................................................................. 10 2.1 The lean burn concept – Operating principle in gas mode....................................................................... 10 2.1.1 Combustion check principle .......................................................................................................... 11 2.1.2 Dynamic combustion control (for the X-DF1.0 technology engines) ........................................... 11 2.1.3 Intelligent control by exhaust recycling (for the X-DF2.0 technology engines) .......................... 11 2.2 Fuel gas system .......................................................................................................................................... 13 2.2.1 General description ....................................................................................................................... 13 2.2.2 Engine internal fuel gas system .................................................................................................... 13 2.2.3 Gas Valve Unit and external fuel gas supply system ................................................................... 15 2.2.4 The iGPR and external fuel gas supply system ............................................................................ 20 2.3 Pilot fuel oil system ..................................................................................................................................... 23 2.4 Exhaust gas system .................................................................................................................................... 25 2.4.1 Exhaust gas system description ................................................................................................... 25 2.4.2 Scavenge air system control ......................................................................................................... 29 2.5 The X-DF engine automation architecture ................................................................................................. 30 2.5.1 Signal flow diagram between the engine control system and external systems ....................... 31 2.5.2 Fuel operating modes .................................................................................................................... 33 2.5.3 The X-DF engine fuel mode transfers and trips ........................................................................... 34 2.5.4 The X-DF engine internal operating modes .................................................................................. 37 3 Arrangement and safety of machinery spaces ........................................................................................................ 44 3.1 Engine room arrangement .......................................................................................................................... 44 3.2 Safety of electrical equipment in engine room ......................................................................................... 44 3.3 Ventilation of engine room ......................................................................................................................... 44 3.4 Breathing / venting arrangement of certain X-DF engine systems .......................................................... 44 3.4.1 General description ....................................................................................................................... 44 3.4.2 Gas pipe venting ............................................................................................................................ 44 3.4.3 Ventilation of gas supply piping annular space ........................................................................... 45 3.4.4 Cooling water system venting ....................................................................................................... 45 3.5 Gas detection in the X-DF engine room, the fuel gas supply system and the X-DF engine .................... 45 3.5.1 If the GVU is installed .................................................................................................................... 45 3.5.2 If the iGPR is installed ................................................................................................................... 47 3.5.3 Gas detection in the crankcase, sumps, scavenge spaces and cooling system vents ............. 48 3.6 Definition of hazardous areas .................................................................................................................... 49 3.6.1 Electrical equipment in hazardous areas ..................................................................................... 50 3.7 Actions to be taken in case of a fire in the engine room .......................................................................... 51 4 Twin engine propulsion ............................................................................................................................................. 52 4.1 Shaft locking device .................................................................................................................................... 52 4.2 Exhaust gas system protection .................................................................................................................. 52 T_PC-Drawing_Portrait Release: 3.02 Page 3 of 66 (22/06/2021) Document ID: DAAD046594 Revision: N Date: 21.07.2021 4.3 Auxiliary systems ......................................................................................................................................... 52 4.3.1 LT cooling water system ................................................................................................................ 52 4.3.2 Cylinder LO system: ....................................................................................................................... 53 5 Cause and effect of safety measures ...................................................................................................................... 55 5.1 Key safety measures: ................................................................................................................................. 55 5.2 Combustion control and monitoring functions .......................................................................................... 55 5.2.1 Knock detection ............................................................................................................................. 55 5.2.2 Cylinder compression/combustion pressure balancing .............................................................. 55 5.2.3 Misfiring detection ......................................................................................................................... 55 5.3 Cause and effect chart for engine malfunctions ....................................................................................... 56 5.4 Extract of alarm list – only the most critical alarms for gas operation included
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