ManBWKMEC主机操作系统说明书

PV diagram
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Balanced plot, Pmax - Pcomp
PrimeServ-Academy Copenhagen 1,1bar -2,5bar
MAN Diesel
Portable measuring unit
Junction Box
MOP B
24V
To Tacho System To Pscav sensor
AMS PC
*Optional
Connectors
Fixed Pressure Sensor
Up to 14 cylinders
ME Engine - PMI (January 2010)
PMI DAU
Pmax Feedback signals Cylinder pressures
MC/ME Engine
ME Engine - PMI (January 2010)
ME Engine - (PLMDIE(4J/aTnOuMar)y 2010)
© MAN Diesel
2010/01/01 < 19 >
Engine tuning process
PrimeServ-Academy Copenhagen PMI Online
Continuous auto tuning
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
PMI system – design
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
PMI / CoCoS-EDS PC
TCP/IP
DAU
MC Engine
ME Engine - PMI (January 2010)
Pmax Feedback signals Cylinder pressure
© MAN Diesel
2010/01/01
Auto tuning: ME & MC engines
P,comp tuning is done by entering a Compression Ratio Offset:
C,Ratio=P,Comp / P,Scav.
C, = Ratio Offset
-1,1 / 3,62 = -0,3
(Reading from P.scav sensor is corrected to Absolute value by adding athmospheric pressure, 1 bar)
© MAN Diesel
2010/01/01
PMI
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01 < 9 >
PT diagram
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Fuel index adjustment
PrimeServ-Academy Copenhagen Index offset (P,i) at High Load in Percentage.
Index offset (P,i) at Low Load in Percentage.
P,Max. Tuning is
done by entering
an offset
directely in bar
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Balanced plot, Pi
PrimeServ-Academy Copenhagen 19,1 bar
MAN Diesel PrimeServ Academy PMI & CoCoS-EDS Applications
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel 2010/01/01 < 1 >
PMI system – purpose
Action:
Adjust engine continuously to best operating conditions
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
PMI system – ensures
PrimeServ-Academy Copenhagen To ensures Emissions according Technical File with: specified components >specified Performance<
Engines operated with low Pmax level
Result:
Increased fuel oil consumption & CO2 emissions 1 bar increase in average Pmax => 0.20 - 0.30 g/kWh decrease in fuel oil consumption
-0,27 bar
P(i) tuning: Offset (High)Load (+0,27/19,1)x100% =1,4%
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Calculated values
PrimeServ-Academy Copenhagen High Load (MCR 6S70ME-C7: 18.660 kW)
PMI offline
PrimeServ-Academy Copenhagen Pressure transducer PMI controller
Ecroonongmtirnoel
Psuopwpelyr
IOdnivrteifdrrmeeqreubdeoianxtcey
LinEdDicator
Cmofroacurnankntsekhdsahaftat pfftricekeuepnd
Adjust Pmax
Identify Pcomp adjust
Adjust Pcomp
Identify MIP adjust
Adjust MIP
Manual offset adjustment
PMI Offline
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01 < 20 >
PMI online 2nd generation
HUB
Primeቤተ መጻሕፍቲ ባይዱerv-Academy Copenhagen PMI/CoCoSEDS PC
Engine Control Room
Engine Room
PMI DAU Data Aqusition Unit
Junction box
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
The PMI Online System
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01 < 18 >
© MAN Diesel
2010/01/01 < 21 >
ME PMI Auto-tuning
PrimeServ-Academy Copenhagen MOP-B
TCP/IP
Arcnet
MPC
Modbus
Remote I/O with I/P converters
Pmax adjustment signals
PMI online – Auto tuning
PrimeServ-Academy Copenhagen Reduction in Fuel oil consumption / CO2 emission 1 bar increase in average Pmax => 0.20 - 0.25 g/kWh decrease in fuel oil consumption
Apply
Apply
Apply
Pmax Pcomp
MIP
Semi - auto tuning
Yes
Obsrv. Key values
Adjustmen
needed? No
Yes
Tuned Engine
Extract key values
Maihak
Retrieve pressures
Identify Pmax adjust
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
ME PMI
PrimeServ-Academy Copenhagen Observations: Engines poorly balanced, often outside recommended deviation limits
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
PT diagram - zoomed
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
A demand for additional balancing when running low load is supplied here.
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01
Adjustment of maximum pressure
PrimeServ-Academy Copenhagen Timing of fuel injection (corresponding to VIT adjustment on the MC engine).
Tuning of P,comp is made by adding an offset to the Compression Ratio here
PrimeServ-Academy Copenhagen The purpose is to follow alterations in: the combustion conditions, the general cylinder condition, the general engine condition in order to discover any operational disturbances.
Two-stroke diesel engine
ME Engine - PMI (January 2010)
© MAN Diesel
2010/01/01 < 6 >
PMI – Cylinder Pressure Analyser
PrimeServ-Academy Copenhagen
ME Engine - PMI (January 2010)
Limit Pmax Potential
Potential
Pure Pmax level increase Potential 5-10 bar At full as well as part loads
Balancing & Pmax level increase Potential additional 2-5 bar Gain even with engines already being operated within recommended limits
PrimeServ-Academy Copenhagen MOP-B
MPC
Arcnet
TCP/IP
I/P converters (MC only)
PMI sensors Actuators
Pmax adjustment signals (VIT)
MOP-S
(CoCoS-EDS / PMI PC)
TCP/IP