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Author Topic: Just suppose,...  (Read 14595 times)
Justme
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« Reply #15 on: March 14, 2010, 08:51:58 PM »

So if I have this right.

When moored you have mains power available (and so can charge the bats fully)
& when on the move the engine can charge the bats?
Add in  an inverter & bat bank sized to cope & the jobs a good un.

So then a small genny will do or even a "travel power" unit
(basically a genny alternator fitted to the engine)

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EccentricAnomaly
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« Reply #16 on: March 15, 2010, 09:46:33 AM »

A boat with electricity available is a good home for a water-source heat-pump.  Ok, more expensive and complicated to install than an immersion but significantly more efficient in operation.
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dhaslam
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« Reply #17 on: March 15, 2010, 10:00:12 AM »

There is a lot to be said for having  electric motors in a boat used for inland use only.   Boats use about fifty times less energy than  the equivalent road vehicle  once it  gets going a small amount of power would keep it moving.  You could use a fairly big motor to make handling easier and for use where there is a water flow or open space.    Batteries would serve a dual purpose but you just couldn't put on a washing on days when you  are moving.   
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knighty
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« Reply #18 on: March 15, 2010, 11:56:06 AM »

just a thought....

what about these water turbines made to hand off the back/side of a boat ?   I can't remember where I saw them... but I've seen a few... and they looked pretty cheap ?

will there be any water flow/tides where you are most of the time ?

something like that (as long as they're any good?) could provide a nice trickle of power into your batterys :-)
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billi
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« Reply #19 on: March 15, 2010, 09:18:01 PM »

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There is a lot to be said for having  electric motors in a boat
  Grin

absolutely  and have a smaller DC Diesel generator /battery bank  to do all

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« Reply #20 on: March 15, 2010, 09:23:42 PM »

..... Roll Eyes but on the otherside  we are a renewable energy forum , and a livingspace/transport idea   that only utilises diesel , is a bid missplaced here  Wink

But i am happy to help later, when you have killed a few diesel generators and search for a reliably PV idea  Grin

Billi


Haha, thanks Billi, I take your point but the high tech has an immediate high price, so I have to go with the traditional method for a while.

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County 4x4
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« Reply #21 on: March 16, 2010, 06:04:11 PM »

That sounds like a pretty big engine for the boat size you mention unless it's going to be working on rivers or inshore waters. Considering the old working narrowboats with 20 plus tons of cargo on board used to manage fine with about 9hp!

Lots of options for calorifiers and extra alternators on modern diesel boat engines to provide power and hot water or you could go the Eberspacher/Webasto route for blown air heat. Those things run on a drip of diesel.

I'd also recommend having a trawl round the CWDF site at http://www.canalworld.net/forums/ - loads of liveaboards and long term boat dwellers on there who will no doubt be happy to advise if you're heading towards ditch dwelling.

Cheers,

Andy

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JohnS
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« Reply #22 on: March 23, 2010, 03:19:41 PM »

Generators are noisy things and your neighbours will not like it when you fire one up in a peaceful anchorage.

Consider getting a water cooled one in a soundproof below deck compartment.

You need a radical rethink of your power requirements to reduce demand.
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Lincsoldbird
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« Reply #23 on: April 15, 2010, 10:33:34 PM »

Hi i would use your main engine with a big alternator to charge a battery bank. It was a cheap engine compared to a generator and you get hot water as well.
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« Reply #24 on: April 15, 2010, 10:38:43 PM »

Hi i would use your main engine with a big alternator to charge a battery bank. It was a cheap engine compared to a generator and you get hot water as well.

But, as already discussed, its hells own job to get the static revs right to get 50 Hz and impossible when on the move with a variable engine load, so Its not realy a viable option
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Iain
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« Reply #25 on: April 16, 2010, 11:00:10 AM »

Amy
Engine alternator will be DC for battery bank charging so speed isn't an issue. The engine coolant will heat the calorifier.

Iain
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Justme
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« Reply #26 on: April 16, 2010, 11:58:37 AM »

Amy
Engine alternator will be DC for battery bank charging so speed isn't an issue. The engine coolant will heat the calorifier.

Iain

Or get a Travelpower unit that does not need a steady fixed RPM to make the 50htz.

Its made for boats.
« Last Edit: April 16, 2010, 12:42:20 PM by Justme » Logged

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Billy
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« Reply #27 on: April 16, 2010, 03:24:44 PM »

Don't rate the Travel Power, too many problems and you still have to run the main engine at light loading which is not good.  It's the same with a generator, how often do you use it to its capacity and really give the motor a thrash.

A lot of people are turning to DC generators to charge the battery bank and run inverters for AC.  I use this system, found myself a 10hp Lombardini electric start air cooled (so I can use it when the tide is out) and banged a lorry alternator on it with a Stirling smart regulator, brilliant.  I can even make it auto start or help the batteries when pulling big loads for a long time off the inverter.

Web search will find problems with the travel power and whilst it is a good idea for use on the run it doesn't make sense if you're not moving.  IMHO, naturally.

Billy

 Grin Grin Grin
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Lincsoldbird
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« Reply #28 on: April 16, 2010, 08:00:37 PM »

Billys right you can trade the cost of the genny on a smaller battery bank. But i would still go for good second hand fork truck and discharge them to no more than 50% of capacity.You should get a good 20 years life .
Paul
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billi
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« Reply #29 on: April 16, 2010, 08:40:31 PM »

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A lot of people are turning to DC generators to charge the battery bank and run inverters for AC

i reckon  anyway that this is the more clever "Generator" than a direct AC Idea

 Grin

Billi
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