8M25

Описание двигателя:

8M25 представляет собой восьмицилиндровый четырехтактный дизельный двигатель, нереверсивный, с турбонаддувом, промежуточным охлаждением и с прямым впрыском топлива.

Технические характеристики

Technical data 8M25
Performance Data
Maximum continuous rating acc. ISO 3046/1	kW	2534	2666
Speed	1/min	720	750
Minimum speed	1/min	240	250
Brake mean effective pressure	bar	25,8	26,1
Charge air pressure	bar	3,0	3,2
Firing pressure	bar	205	210
Combustion air demand (ta = 20°C)	m³/h	13740	14605
Specific fuel oil consumption
n = const1) 100%	g/kWh	187
85%	g/kWh	184
75%	g/kWh	184
50%	g/kWh	193
Lubricating oil consumption 2)	g/kWh	0,6
NOx -emission 6)	g/kWh	9,6
Turbocharger type		KBB HPR6000
Fuel
Engine driven booster pump	m³/h /bar	1,5/3
Stand-by booster pump	m³/h /bar	2,7/10	2,8/10
Mesh size MDO fine filter	mm	0,025
Mesh size HFO automatic filter	mm	0,01
Mesh size HFO fine filter	mm	0,034
Lubricating Oil
Engine driven pump	m³/h /bar	89/10	93/10
Independent pump	m³/h /bar	60/10
Working pressure at engine inlet	bar	4 - 5
Independentsuction pump	m³/h /bar	70/3
Primimg pump pressure/suction pump	m³/h /bar	10/13/5
Sump tank content/dry sump content	m³	3,4	3,6
Temperature at engine inlet	⁰C	60 - 65
Temperature controller NB	mm	100
Double filter NB	mm	80
Mesh size double filter	mm	0,08
Mesh size automatic filter	mm	0,03
Fresh water cooling
Engine content	m³	0,5
Pressure at engine inlet min/max	bar	4,5/6,0
Headertank capacity	m³	0,25
Temperature at engine outlet	⁰C	80 - 90
Two-circuit system
Engine driven pump HT	m³/h /bar	55/4,5
Independent pump HT	m³/h /bar	55/4,0
HT-controller NB	mm	100
Water demand LT-charge air cooler	m³/h	55
Temperature at LT-charger air cooler inlet	⁰C	38
Heat dissipation
Specific jacket water heat	kJ/kW	500
Specific lube oil heat	kJ/kW	490
Lube oil cooler	kW	345	362
Jacket water	kW	352	370
Charge air cooler (HT stage)3)	kW	661	752
Charge air cooler (LT stage)3) (HT stage after engine)	kW	236	256
Heat radiation engine	kW	113
Exhaust gas
Silencer/spark arrester NB 25 dBA	mm	600/600
Pipe diameter NB after turbine	mm	600
Maximum exhaust gas pressure drop	bar	0,03
Exhaust gas temp after turbine (25°C intake air) 5)	⁰C	325	333
Exhaust gas mass flow (25°C intake air)5)	kg/h	16982	18050
Starting air
Starting air pressure max.	bar	30
Minimum starting air pressure	bar	7
Air consumption per start4)	Nm³	0,8
Max. crankcase pressure, nominal diameter ventilation pipe	mmWs/ mm	15/80
1) Reference conditions: LCV = 42700 kJ/kg ambient temperature 25 ⁰C
charge air coolant temperature 25 ⁰C tolerance 5 %
+ 1 % for engine driven pump
2) Standard value tolerance ± 0,3 g/kWh related on full load
3) Charge air heat based on 45 ⁰C ambienttemperature
4) Preheated engine
5) Tolerance 10 % rel. humidity 60 %
6) MARPOL 73/78 Annex VI, Cycle E2, E3, D2

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