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Old 05-08-17, 10:52 AM   #1
Doodlebug
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Default Using a Lister D as a generator - most power possible.

Dear all,

I have an unusual (ish) question in that I want to use a lister D to generate as much power as is possible.

I have a narrowboat and to cut a long story short the lister at the front of the boat will drive an alternator which will then power an electric motor at the back of the boat.

The minimum I need is 24v at 30a however the more I can get the better. 45a would be ideal.

By my rough calculations that is just over 1 KW so the lister should cope. I was going to rig it up using a belt around the flywheel.

Does anyone have any thoughts on this - will the lister struggle to cope?

Many thanks for any help you can give!

Thomas


P.s. - Am I right in saying an alternator does not give any resistance until the field windings are powered up? So you could start the engine easily by hand before flicking a switch to put load on the engine?
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Old 05-08-17, 11:11 AM   #2
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Dont Know about the power side but your PS is correct. You have to energise the alternator before it starts to generate.
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Old 05-08-17, 11:13 AM   #3
Lister M
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It will work but your engine will be working at full load and will suck petrol out of fashion surely a small diesel would be better particularly an aircooled one, you will have to sort cooling for the D as it will boil nicely.

Martin P
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Old 05-08-17, 11:15 AM   #4
listerdiesel
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Welcome to the Forum, Thomas.

You may find that a belt on the flywheel will slip at 1kW, getting B size grooves machined may be better.

There is no significant drag at low rpm, so starting should not be a problem.

A CAV alternator should give you plenty of grunt, I have a new AC203/60 under the bench, max output available at 1500rpm :

http://www.prestolite.com/literature...ily_manual.pdf

It is a cradle mount sealed type.

Peter
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Old 05-08-17, 11:17 AM   #5
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You normally flash the field through the warning light, cut-in speed is 750rpm for the AC203.

Peter
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Old 05-08-17, 11:18 AM   #6
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Thanks! Yes it will use more petrol but how much is too much. Surely not that much more than a standard generator might use. Though of course it is less efficient.

Long term a diesel would be much better. But want to test the idea with what I have as a) I don't want anything that revs too quickly as a slow engine sounds rather nice and an air cooled seems not to. B) trying to get hold of a lister CS at a good price is proving difficult and then loading it into the boat will be a job! Once this works I'll see what I can upgrade!
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Old 05-08-17, 11:22 AM   #7
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'Old school' plant generally allows about 2hp of engine for every kW of electrical output.

NHH
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Old 05-08-17, 12:09 PM   #8
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Luckily the plucky Lister D comes in a 2hp version, however, it will be running at 1000rpm to achieve this and, you say you don't want anything that revs too quickly (undefined).

However, if you have room for a Lister CS, but still want a petrol engine, then why not consider a Lister A type, 3 to 3.5hp at about 600rpm.

Phillip
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Old 05-08-17, 12:41 PM   #9
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I have an 18 month old 2Kw four stroke generator with a approx one gallon tank which runs 3 - 4 hrs a night charging my mobility scooter and running a 1000 watt oven for 6 days at Dorset and I still have fuel left over but my 2hp Lister D Hamworthy compressor set uses a gallon a day for five days with the compressor off load.

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Old 05-08-17, 01:27 PM   #10
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why not a lister aircooled diesel such as a ld1 or if you want more power, a st1. both are relatively easy to find, cheap to run and have good low revving power.
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