General ship propulsion

Re: PLAN ship propulsion thread

Just For Your Information

QD128燃气轮机中标伊拉克油田自备电站项目
作者: 任心随风 发布日期: 2011-7-29 查看数: 1857 出自: [复制链接]
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中国航空报
经过激烈角逐，中海油伊拉克有限公司MISSAN油田自备电站项目评标终于尘埃落定，中航工业黎明两台QD128燃气轮机发电机组及安装调试工程，以高分通过审查，正式得到项目中标通知书。自此QD128燃气轮机终于打破国产燃气轮机海外市场进入壁垒，成功走向国际市场。

中海油与伊拉克钻井公司等四家单位合作的MISSAN油气田开采项目自备电站，两台机组一备一用。此次参与竞标的其他产品均是目前有着良好市场占有率的国外知名厂商产品，包括美国索拉公司MARS100、日本日立公司H-25以及乌克兰曙光公司UGT15000等。作为我国自主研发的燃气轮机，QD128燃气轮机首次参与国际投标，并在激烈市场竞争中脱颖而出，这充分表明该型燃气轮机的成熟度已经得到客户的广泛认可，这也是QD128燃气轮机继2010年成功销往山西潞安集团后的再次商业成功。

这第2次商业成功，对正在奋力前行的中国燃气轮机行业不啻为'强心剂",有着重大意义。白兔应该抓住这样的机遇，促成整个燃气轮机行业的升级换代，良性循环。希望在未来，但这个时刻，我们值得欢喜！

Google Translation

QD128 gas turbine bid Iraq oil power station project
Author: Ren Xin release date with the wind: 2011-7-29 see number: 1857 from: copy the [link]
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China Aviation News
After a fierce rivalry, CNOOC Iraq limited MISSAN oil field power station project tender was finally settled, aviation industry in two dawn QD128 gas turbine generator and installation works, to high scores through the review, formally bid notices. Since QD128 gas turbines and finally break the overseas market entry barriers for domestic gas turbine, successfully into the international market.


CNOOC and Iraq drilling company four units such as cooperation in MISSAN oil and gas field exploitation project of power station, two units. Other products of this bidding is now has a good market share of foreign manufacturers product, including the United States MARS100, Sulla company Japan Hitachi H-25 and Ukraine dawning company UGT15000. As an independent research and development of gas turbine in China, the QD128 gas turbines for the first time to participate in international bidding, and emerged in the fierce market competition, which demonstrated the maturity of the gas turbine has been widely recognized by customers, this is also the QD128 gas turbine after successfully sold in Shanxi Lu group 2010 commercial success once again.


The 2nd commercial success, on gas turbine industry in China is struggling to move on much as ' tonic ", has a significant meaning. Rabbits should seize this opportunity to facilitate the upgrading of gas turbine industry as a whole, a virtuous circle. Hope in the future, but this time, we are worthy of joy!

This is a thread to remove the ship propulsion topic from the Chinese CV thread.

Let's assume that at some time nuclear ship propulsion is so safe and cheap that merchantmen might use it, while fuel oil has become too expensive. If we then use even safer and cheaper reactors on land to produce liquid hydrogen and build ships with on the stern places to put tanks with liquid hydrogen and use fuel cells or gas turbines with heat exchangers, both giving an efficiency of about 60 %, chose the cheaper one, to feed electric power to the propulsion motors, wouldn't those ships not be much cheaper to use than those using nuclear propulsion, even for the largest ships?

Thanks for starting this thread.

For large ships, nuclear propulsion makes a lot of sense because it frees up a lot of space that would otherwise have been taken up by fuel tanks. 1 example I heard was that the old WWII battleships' fuel tanks have a larger capacity compared to the accompanying modern oilers that resupply them.

The other advantage of nuclear propulsion is that the ship won't run out of fuel. Thus, it can go at maximum speed around the world a few times if they need to. Don't have to worry about running out of gas.

These 2 advantages make nuclear propulsion a niche area for large warships.

Regarding fuel cells, if I'm not mistaken, their current limitation is 1 of energy density as compared to conventional propulsion (not to mention the cost). Until such time when the energy density issue can be solved and cost becomes comparable, it will unlikely to be adopted.

Nonetheless, in the more modern LPG and LNG carriers, the the "boil off" from its cargo is used to power the vessel's generators and engines.

Indeed early LNG carriers used steam propulsion plant because it made it easier to use the boil off.
I was talking about a future when fuel oil will be in limited supply. In the second oil crisis in the early '70's designs were prepared for coal burning bulk carriers. Because of the low efficiency of the steam plant and the huge size of the necessary coal bunkers these ships were much larger than equivalent diesel ships. None were built.
I would like to see gas turbines with heat exchangers because they have an efficiency as high as a diesel engine, they would have a lower weight and the fuel would weight a lot less. You would put the bridge and the accommodation at about a third of the length from the stem as in old tankers, while the LH2 tanks would be placed aft and replaced with full ones when they are empty.

Well, there is always synthetic fuel that current engines and generators can use. Didn't Nazi Germany use synthetic diesel back in WWI?

The Fischer-Tropsch process was developed in the '20's and '30's to make oil fuels ( diesel and gasoline ) and lubricants from coal and water. It was used by Germany during WWII and by Apartheid South Africa as an addition to the oil imported from Iran. The process is now used to make liquid fuel and other products from natural gas in Qatar and Malaysia.
But you might want to reduce the burning of coal and natural gas will run out too. So if the feed stock is to be produced by nuclear reactors LH2 might be the right fuel. I see no opportunity to use hydrogen as fuel for vehicles except for ships, airships and space rockets. Otherwise collect carbon dioxide from the air, probably the the form of farming waste that is first usefully burned, then combine it and hydrogen to for example di-methyl-ether which is a good fuel for diesel engines and fuel cells.

Excellent thread delft! This thread will be combined with our other ship propulsion thread but shall retain this name...

Discuss either Naval or merchant propulsion in this thread.

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QUOTE=Spartan95;161279]Thanks for starting this thread.



The other advantage of nuclear propulsion is that the ship won't run out of fuel. Thus, it can go at maximum speed around the world a few times if they need to. Don't have to worry about running out of gas.

These 2 advantages make nuclear propulsion a niche area for large warships.

Click to expand...

AS far as a/c are concerned you would have the question of volatility. What with the ordnances , jet fuel and licquid nitrogen?

I've summarized the various propulsion system used in most marine applications as a quick and dirty reference. Most comes from wikipedia.

Combined Nuclear And Steam propulsion system (CONAS) is used on the Kirov class Guided missile cruisers.

Combined gas and steam (COGAS) is the name given to marine compound powerplants comprising gas and steam turbines, the latter being driven by steam generated using the heat from the exhaust of the gas turbines. In this way, some of the otherwise lost energy can be reclaimed and the specific fuel consumption of the plant can be decreased.

Combined gas turbine and gas turbine (COGAG) is a type of propulsion system for ships using two gas turbines connected to a single propeller shaft.
Type 22 Frigate (Batch 3) (Royal Navy)
Invincible-class aircraft carrier (Royal Navy)
Hyūga class helicopter destroyer (Japan Maritime Self-Defense Force)

Combined gas or gas (COGOG) is a propulsion system for ships using gas turbine engines. A high efficiency, low output turbine is used for cruising speeds with a high output turbine being used for high-speed operations.

Combined steam and gas (COSAG) is a propulsion system for ships using a combination of steam turbines and gas turbines to power the shafts. County class destroyer

Combined diesel and diesel (CODAD) is a propulsion system for ships using two diesel engines to power a single propeller shaft.

Combined diesel-electric and gas (CODLAG) is a modification of the combined diesel and gas propulsion system for ships.
A CODLAG system employs electric motors which are connected to the propeller shafts.
Type 23 frigate (Royal Navy)
F125 class frigate (German Navy)

Combined diesel and gas (CODAG) is a type of propulsion system for ships which need a maximum speed that is considerably faster than their cruise speed

Combined diesel or gas (CODOG) is a type of propulsion system for ships that need a maximum speed that is considerably faster than their cruise speed. For every propeller shaft there is one diesel engine for cruising speed and one geared gas turbine for high speed dashes. Both are connected to the shaft with clutches, only one system is driving the ship in contrast to CODAG-systems, which can use the combined power output of both.
Anzac class frigates
MEKO frigates/destroyers


The General Electric LM2500 is an industrial and marine gas turbine produced by GE Aviation. The LM2500 is a derivative of the General Electric CF6 aircraft engine.

Applications

Arleigh Burke class destroyer
Independence class littoral combat ship
Kidd class destroyer
Oliver Hazard Perry class frigate
Spruance class destroyer
Shivalik class frigate
Ticonderoga class cruiser
Type 052 destroyer
Valour class frigate
Sachsen class frigate
Brandenburg class frigate
Bremen class frigate
FREMM multipurpose frigate
Horizon class frigate
Halifax class frigate
Anzac class frigate
Sa'ar 5 class corvette
Fridtjof Nansen class frigate

@Spartan95

That is not true. Nuclear propulsion isn't unlimited energy.