Hybrid Ships

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Big Pete
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Hybrid Ships

Postby Big Pete » Fri Oct 20, 2017 2:33 pm

Interesting article on a new Diesel Electric (LNG)/ Battery Hybrid ship.


https://www.imarest.org/themarineprofes ... g-princess
It is always better to ask a stupid question than to do a stupid thing.

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Merlyn
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Re: Hybrid Ships

Postby Merlyn » Sun Oct 22, 2017 2:09 am

Read the article with much interest but what about the battery side of things?
Are they leased like many other hybrid applications owing to their horrendous initial costs?
What exactly type of battery is used as capacities seem to be on the increase together with charging times being much lower.
Wonder what the expected life is to be.
Can you change cells or is it one lump.
Sealed unit probably methinks?
Remembering The Good Old days, when Chiefs stood watches and all Torque settings were F.T.

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Big Pete
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Currently located: Solihull, England

Re: Hybrid Ships

Postby Big Pete » Sun Oct 22, 2017 6:53 am

Hi Merlyn,
That is the trouble with these articles in the Professional Mags now, very short on Technical detail. Little more than "Advertorials".
However, you are saving on the purchase and running costs of one engine, as on most supply ships, 2 engines plus the battery can provide all the power required,(with the third engine on standby in case one of the others fail) to maintain position on DP and three engines would give full transit speed.
The newer type Diesel Electric plant where the engines run at variable RPM and generate constant Voltage DC power, distributed via Ring Main to the Inverters for each propulsion motor and the ships domestic supply would mean the battery could be charged from the DC ring main and discharge power back to it, without the need for Battery chargers and inverters to connect the Battery to the system (as would be required with an A/C Generation and distribution system).
Combine that with RIM Magnet propulsors and you have a modern efficient, low maintenance ship.
BP
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It is always better to ask a stupid question than to do a stupid thing.


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