"Exage03040 @ opposite-lock.com" (exage03040)
08/14/2020 at 15:30 • Filed to: shippost, shippositelock, #SHIPLOPNIK, engines, alternative energy, alternate fuels
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"Exage03040 @ opposite-lock.com" (exage03040)
08/14/2020 at 15:30 • Filed to: shippost, shippositelock, #SHIPLOPNIK, engines, alternative energy, alternate fuels | 2
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If you don’t want to read subtitles I got you covered!
That is the word from MAN describing the new experimental testing 4S50ME-X9.7 two-stroke slow-speed marine diesel engine as it meanders through Copenhagen, Denmark. First by barge, then by truck a few months ago to its final testing spot.
Travelling all the way from South Korea, this “tiny” 4 cylinder engine develops 7120kW [9544bhp] with a displacement of 1963 litres [500mm bore and 2500mm stroke] and weighs 272 tonnes (~600,000lbs). It’s ‘redline’ is 117rpm. You thought the Porsche 968 had a large 4 banger huh?
I suppose it is small when compared to the G95ME-C, the largest MAN engine series with a 950mm (+3ft) bore which produces an output of 6860kW [9200hp] per cylinder... Available up to 12 cylinders for 82,440kW [110,500bhp].
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This type of engine is typically found in large cargo vessels like container-ships, oil tankers and bulk carriers. MAN B&W powers many of such vessels and is a significant powerhouse in the transportation of goods for the world economy. These vessels spend weeks travelling between ports. Unfortunately battery technology will not be a suitable option for such long journeys, especially on routes with vessels nowhere near shore. This engine will be used to test various alternate fuels and their viability for future transoceanic shipping. IMO is forcing all vessels all over the world to develop engines and vessels with much cleaner exhaust emissions with ambitious goals:
The strategy is to reduce shipping CO2 emissions from new vessels by 40% compared to today when 2030 rolls around and 70% by 2050 as set out by IMO regulations and projections:
!!!error: Indecipherable SUB-paragraph formatting!!!
Additional goals are set for the reduction of SOx (sulphur), NOx (nitrogen) and particulate air emissions from engines. Current regulations of Tier II global and shore Tier III Emission Control Areas for NOx are currently in place and SOx is coming down as marine fuel oils were required to drastically reduce sulphur content at the start of this year.
Stated in the video is at the engine will be modified for the continued development of current alternate fuels and test the potential feasibility of others under full scale test conditions with the following fuels with Gas Injection (GI) and Liquid Gas Injection (LGI) for MAN B&W 2-stroke ME engines.
Alternative fuels successfully powered MAN B&W 2 stroke engines at sea:
ME-GI: LNG (Liquefied Natural Gas)
ME-LGIP: LPG (Liquefied Petroleum Gas)
ME-LGIM: Methanol
ME-GIE: Ethane
Upcoming:
ME-GA: Low Pressure LNG (Liquefied Natural Gas) designed for LNG Tankers (First Delivery for Late 2021)
Fuels potentially for/in research:
Ethanol
Dimethyl Ether (DME)
Ammonia
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A little more on ME-GI, ME-LGI and ME-LGIM engines here:
https://marine.man-es.com/two-stroke/2-stroke-engines/me-gi-engin
Thank you for reading! :)
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https://japan.man-es.com/news/news-details/2018/05/30/dual-fuel-engine-hits-10-000-hours-on-ethane
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https://japan.man-es.com/news/news-details/2019/07/30/dual-ships-pass-dual-fuel-methanol-milestone
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Cé hé sin
> Exage03040 @ opposite-lock.com
08/14/2020 at 18:50 |
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I was surprised that MAN/B & W were getting their engines made as far away as South Korea, but given their size I guess it makes sense to make them near to the yards that use them.
I’m still surprised that they’re continuing with two strokes though.
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Exage03040 @ opposite-lock.com
> Cé hé sin
08/14/2020 at 20:36 |
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Correct,
South Korea is home to the Hyundai Heavy Ulsan shipyard. Which is the largest shipyard in the world at 7.2 sq km or 1780 acres and produces 10% of the ships for the global market. Much of the shipbuilding have licensed local yard buildups for marine engines.
Large 2-Stroke marine engines are actually extremely efficient
. Especially as they are usually matched direct drive to a fixed pitch propeller for long haul. T
hey’re quite different than small
automotive or motorcycle 2-strokes, even the diesel ones
.
Passenger vessels use the 4-stroke mediums primarily for NVH and it allows better designs and layout characteristics
for those vessels
. They also max out at around 20,000kW for a 16 cylinder
46.
S
peaking as a Mar
Eng;
normally for maintenance
sake
we’re happier with less engines and less cylinders
.
This is an old chart but it gives you the sense of efficiency
with the larger 2-
stroke vessels, the bigger the better
. The CO2 produced per tonne of cargo transported
over a km. *lower the better.
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Cé hé sin
> Exage03040 @ opposite-lock.com
08/16/2020 at 17:39 |
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Oh, I know about the thermal efficiency of two strokes, it's the emissions I was thinking of. Emissions are not their strong point. I think Wärtsila have hived off their two stroke business to a new company.
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Exage03040 @ opposite-lock.com
> Cé hé sin
08/16/2020 at 20:33 |
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IMO does give leeway on NOx for like 40% more compared to a 600rpm engine, but as it’s engine specific there are other factors effecting emissions with the propulsion, hull design and operation and maintenance .
IMO
CO2 reduction
is actually interesting because it does take into vessel design along with the engine
with EEDI requirements. And going further to include tracking performance like
fuel oil
consumption and maintenance and upgrades.
One of the major this is indeed thermal efficiency as the SFOC is better with a slow speed. Less fuel = less money to transport goods. Likewise with different fuels is cost . LNG was silly cheap buy and burn even with the increased consumption to meet the same power demand compared to FO for our Ferries . Ups and downs...
They have. Essentially pawned off the Sulzer Portion to China State Shipbuilding Corporation (CSSC) and renamed it Winterthur Gas & Diesel Ltd. (WinGD). Admittedly I haven’t been following past few years so that’s my mistake . It’s been a while since I worked slow speed too.