THIS is a diesel... - PeachParts Mercedes-Benz Forum

rebreath · #1 10-19-2006, 01:35 AM

The “flagship” of the MAN B+W product line, and an engine often chosen for
container ship propulsion, is the K98-MC engine. This engine is 980mm bore,
and produces up to 90,000 horsepower (12-cylinder version.) The first of these
monster engines was tested in 1999 at Hyundai, Korea.

sorry could not find a pic

richard u · #2 10-19-2006, 05:04 AM

Quote:

Originally Posted by rebreath

The “flagship” of the MAN B+W product line, and an engine often chosen for
container ship propulsion, is the K98-MC engine. This engine is 980mm bore,
and produces up to 90,000 horsepower (12-cylinder version.) The first of these
monster engines was tested in 1999 at Hyundai, Korea.

sorry could not find a pic

here is one http://www.daros.se/technical/image17.htm

note size of people for scale (G)

Shorebilly · #3 10-19-2006, 06:06 AM

G'mornin' Guys,

Aren't Ship's engines neat!!!! Y'all oughta hear them run!!

I retired as Cheif Engineer from a major US Steamship Line.....I did both Steam and Motor.....

SB

R Leo · #4 10-19-2006, 08:41 AM

Quote:

Originally Posted by rebreath

The “flagship” of the MAN B+W product line, and an engine often chosen for
container ship propulsion, is the K98-MC engine. This engine is 980mm bore,
and produces up to 90,000 horsepower (12-cylinder version.) The first of these
monster engines was tested in 1999 at Hyundai, Korea.

sorry could not find a pic

http://www.peachparts.com/shopforum/showthread.php?t=91039&highlight=MAN+ship

http://www.peachparts.com/shopforum/showthread.php?t=68529&highlight=MAN+ship

riethoven · #5 10-19-2006, 09:09 AM

I like an engine with it's own lighting system and work platforms.

rebreath · #6 10-19-2006, 09:32 AM

Quote:

Originally Posted by Shorebilly

G'mornin' Guys,

Aren't Ship's engines neat!!!! Y'all oughta hear them run!!

I retired as Cheif Engineer from a major US Steamship Line.....I did both Steam and Motor.....

SB

got plenty of that.spent several years as commercial diver and before that a commercial fisher.nothin that large,but big enough

Jeremy5848 · #7 10-19-2006, 11:46 AM

I understand these big ship diesels run on heavy bunker oil. Do the engines come with a Vegatherm to heat the oil so it will flow? We have a lot of discussions on this forum about running a Mercedes diesel on unheated vegetable oil. How do these behemoths do it?

What kind of a system is used to get the engine started? Do they use glow plugs and a giant starter motor?

Matt L · #8 10-19-2006, 12:17 PM

Quote:

Originally Posted by Jeremy5848

What kind of a system is used to get the engine started? Do they use glow plugs and a giant starter motor?

Probably no glow plugs. I've seen farm equipment with ether tubes from the cabin to the intake for starting; you insert an ether pill in the holder on the dash, close the cover and push it to crush the pill. But that tractor did use an electric starter motor.

That ship engine likely has an electric starter motor as well, but it would start the starter engine, which in turn spins the big one.

Chris W. · #9 10-19-2006, 12:42 PM

To quote myself from the last time this type thread surfaced...

I work for the company that makes a similar engine - or should I say designs similar engines. Today almost all large 2-stroke engines like that are "license built" in that Hyundai or, or any of many other such companies around the world, builds the engine to our design. We design the engine, the licensee company builds it.

These engines are started with compressed air at 435 psig (30 barg). Air is let into the engine thru a special valve in the cylinder head and presses directly on the piston. There is an air distributor which, when the piston reaches the bottom of the stroke, changes the air inlet to another cylinder. If you put 435 psig on to a piston which is 96 cm (~38") in diameter, a little bit of math tells you that you have almost 500,000 lbs of force on that piston. Do the math - it's surprising what a little compressed air can do. Of course the pressure drops once the piston starts down, etc. etc.

So you can actually start one of these engines with an itty bitty air compressor, and a BIG air tank. It just takes a good bit of time to fill the air tank!

These engines do run on No. 6 fuel oil, aka Bunker fuel oil, aka heavy fuel oil, which does have to be heated to roughly 250F to obtain the correct viscosity for injection (actual temperature depends how bad the fuel is). Normally the engines can start and stop on this fuel as it is kept circulating hot even when the engine is stopped. But for long shutdowns and cold starts, we do use diesel fuel. Typically, steam produced by exhaust gas boilers (waste heat recovery) is used to heat the fuel oil.

Rgds,
Chris W.

R Leo · #10 10-19-2006, 12:48 PM

Quote:

Originally Posted by Jeremy5848

I understand these big ship diesels run on heavy bunker oil. Do the engines come with a Vegatherm to heat the oil so it will flow? We have a lot of discussions on this forum about running a Mercedes diesel on unheated vegetable oil. How do these behemoths do it?

What kind of a system is used to get the engine started? Do they use glow plugs and a giant starter motor?

Large marine diesels are generally started using high pressure air.

And, big marine engines are started and manuver in port on diesel or something close to it. Once they're underway and over the bar, they switch to 'sea fuel' ...the bunker grade goop which is indirectly heated by the main engine exhaust. Engines this size are direct-reversing, or coupled directly to the propeller shaft and must be stopped and restarted in reverse to reverse the propeller.

bgkast · #11 10-19-2006, 01:45 PM

Quote:

Originally Posted by Matt L

Probably no glow plugs. I've seen farm equipment with ether tubes from the cabin to the intake for starting; you insert an ether pill in the holder on the dash, close the cover and push it to crush the pill. But that tractor did use an electric starter motor.

That ship engine likely has an electric starter motor as well, but it would start the starter engine, which in turn spins the big one.

My grandpa has an old CAT that uses a small gas engine as a starter.