12 volt hot water jug

Submitted: Sunday, Jan 22, 2006 at 13:17
ThreadID: 29974 Views:12376 Replies:11 FollowUps:20
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I have seached everywhere looking for a good quality 12 volt hot water jug, it has to be able to take upto about 1 lt.

have looked at waeco but not overly happy.

Regards Richard
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Reply By: Notso - Sunday, Jan 22, 2006 at 13:48

Sunday, Jan 22, 2006 at 13:48
Hey mate,

in my experience you are better off jumping out of the truck, digging for water with a blunt shovel. Then rub two sticks together to make fire and boil your billy that way. It would be a lot faster!
AnswerID: 150146

Follow Up By: olcoolone - Sunday, Jan 22, 2006 at 13:59

Sunday, Jan 22, 2006 at 13:59
That is what i am thinking to!, Just that some of the councils get very upset when you try that in there town square, but i supose nothing stoping me doing on the road.........some of the pot holes over here in South Oz do go down the the water table......any ideas where i can get the wood for the fire from?

Regards Richard
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Follow Up By: Member - Blue (VIC) - Sunday, Jan 22, 2006 at 13:59

Sunday, Jan 22, 2006 at 13:59
Agree... I had a waeco unit and a mate had another brand(not sure of the name, held 2 cups though)... Both took about 30-40mins to boil and sucked a bucket load of juice... I have an Aussie Bush Kettle, which boils quickly over a small fire and even quicker on a ring burner... Expensive but versatile, I wouldn't go away without it...
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Follow Up By: Shaker - Sunday, Jan 22, 2006 at 14:03

Sunday, Jan 22, 2006 at 14:03
I agree, handful of leaves & few twigs down the centre, bush kettle is hard to beat, it boils in no time & the tiny fire is like putting out a cigarette!
We don't leave home without it.
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Reply By: Mike Harding - Sunday, Jan 22, 2006 at 13:59

Sunday, Jan 22, 2006 at 13:59
Are you really, really sure you want to do this?

There is a constant for raising the temperature of water but I can't find it so I measured my electric kettle and it took 2m:50s to boil 1lt of tap water. The kettle consumes 2400W so that means it used 408 kilowatt seconds of power.

Let's assume you can draw 15 amps from your 12V supply - that equals 180W of energy so to equal 408 KW secs. you would need to boil your kettle for 38 minutes.

1000 / 180 = 5.55

5.55 * 408 = 2266 seconds = 38 mins.

Personally I'd buy a $30 gas stove. Make sure you keep your engine running or
you'll probably flatten the battery.

Mike Harding
AnswerID: 150151

Follow Up By: Notso - Sunday, Jan 22, 2006 at 14:04

Sunday, Jan 22, 2006 at 14:04
So how many kilowatt seconds does it take to make a fire by rubbing two sticks together??
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Follow Up By: Mike Harding - Sunday, Jan 22, 2006 at 14:10

Sunday, Jan 22, 2006 at 14:10
Ah! That's a direct linear function of the intelligence of the person rubbing the sticks.

Mike Harding
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Follow Up By: olcoolone - Sunday, Jan 22, 2006 at 14:19

Sunday, Jan 22, 2006 at 14:19
When using sticks rubbed together you don't use the kilowatts per second measurement, you should be using a stress "o" meter followed by a frustration gauge.

Regards Richard
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Follow Up By: Nudenut - Sunday, Jan 22, 2006 at 14:41

Sunday, Jan 22, 2006 at 14:41
use a hyclone..its fast cheap and relaible
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Follow Up By: Notso - Sunday, Jan 22, 2006 at 14:45

Sunday, Jan 22, 2006 at 14:45
Probably requires the same input as rubbing sticks together, Less effective though
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Follow Up By: Nudenut - Sunday, Jan 22, 2006 at 14:46

Sunday, Jan 22, 2006 at 14:46
every one..? well almost every one swears by them
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Follow Up By: gramps - Sunday, Jan 22, 2006 at 14:50

Sunday, Jan 22, 2006 at 14:50
"every one swears by them"

I think Nudie meant "every one swears at them" LOLOLOL
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Follow Up By: Nudenut - Sunday, Jan 22, 2006 at 14:58

Sunday, Jan 22, 2006 at 14:58
bloody secretaries....cant get a good one these days......wnat more money than I and cant even type
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Follow Up By: techie - Monday, Jan 23, 2006 at 00:56

Monday, Jan 23, 2006 at 00:56
This forum is on a good roll tonight.
Mike
Is it linear or inverse linear function of the intelligence of person rubbing sticks.
More intelligent - knows better.
or more intelligent - limiting common sense?
Nudenut - sent your "theories" to the missus, she's going to prove it when she gets home.
Techie
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Follow Up By: Nudenut - Monday, Jan 23, 2006 at 07:36

Monday, Jan 23, 2006 at 07:36
what...that they're wrong.....or have you been losing brownie points, and you know she will be a little LOUD when she arrives home
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Follow Up By: GaryInOz (Vic) - Monday, Jan 23, 2006 at 13:38

Monday, Jan 23, 2006 at 13:38
Steel wool and some jumperleads. 2 seconds ;-)
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Follow Up By: GaryInOz (Vic) - Monday, Jan 23, 2006 at 13:40

Monday, Jan 23, 2006 at 13:40
The formula for Gorup Iq is :

GrIQ = 150/n, where n is the number of ppl in the group
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Follow Up By: gramps - Monday, Jan 23, 2006 at 14:21

Monday, Jan 23, 2006 at 14:21
Sorry GaryInOZ, you forgot the corrective factor when I'm included in the 'n'.

The formula becomes

GrIQ = 150/(n+1) LOLOL
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Follow Up By: Nudenut - Monday, Jan 23, 2006 at 16:50

Monday, Jan 23, 2006 at 16:50
what?
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Reply By: gramps - Sunday, Jan 22, 2006 at 15:03

Sunday, Jan 22, 2006 at 15:03
Agree with Mike. Those little gas stoves go for under $20 these days. Just the thing for boiling the billy by the side of the road.
AnswerID: 150156

Reply By: JJ - Sunday, Jan 22, 2006 at 15:13

Sunday, Jan 22, 2006 at 15:13
Purchase a thermos flask. You will be far more rewarded. Filled with 'billy' boiled water before departing camp and you wouldn't know the difference up the track.
I did just that when my sister was in hospital one time & hanging out for a cup of good ol' billy-tea! Took her for a stroll to the park and morning "billy' tea!

Back to the topic in question:
I have a 1lt 'Lion' brand (Aust. approved) 12v 150w jug and have never used it.
I thought the whole idea was to boil it while on the road so as to stop and make a cuppa, but not to be. There's a... WARNING: Never heat kettle of have hot water in kettle when vehicle is in motion.
Just a waste of space IUAM.
AnswerID: 150159

Reply By: johannagoanna - Sunday, Jan 22, 2006 at 18:07

Sunday, Jan 22, 2006 at 18:07
I have a fantastic little one that takes about 5 minutes to boil. Got it from a marine place in Vic. years ago! Sorry, but it doesn't have a label on it so I can't help you with the make. Try a marine supplier near you! - JO
AnswerID: 150169

Reply By: P.G. (Tas) - Sunday, Jan 22, 2006 at 18:48

Sunday, Jan 22, 2006 at 18:48
Check with your local Waeco Fridge dealer. Waeco has a few 12V options, might be worth a look. Saw them in the new 2006 catalogue.

Cheers
AnswerID: 150175

Reply By: Brew69(SA) - Sunday, Jan 22, 2006 at 18:56

Sunday, Jan 22, 2006 at 18:56
As mentioned the butane canister stove is the way to go, or the thermos(just remember to pre heat the thermos and it will stay hot for a good 10 hours or more.)
AnswerID: 150177

Reply By: JustyWhyalla - Sunday, Jan 22, 2006 at 22:47

Sunday, Jan 22, 2006 at 22:47
I use the cheap butane cartridge style stove. Works a treat and easy to pack in it's case where you can get to it easy on the road. (Bloody kettle is usually buried somewhere harder to get though!)

Otherwise saw an ad recently for I think it was coleman who have a butane cartridge powered kettle! Have a feeling it would be a bit pricey though.
AnswerID: 150221

Reply By: BlueSky - Monday, Jan 23, 2006 at 11:57

Monday, Jan 23, 2006 at 11:57
Mike, your calculations are incorrect regarding that problem using the warming up of water.
This is a Grade 11 or 12 student problem.

1) Energy passed from one substance to the other is called calories or Kilojoules
and not watts
Calories or Joules are quantity of potential and kinetic work
but Watts are rate of work.

2) All depend the mass of substance to warm up and the type of material your warm up.
The heating coefficient of water is lower than oil for example.
But there are many, many other factors like altitude etc.

Mike join the newsgroup called wastewatts@yahoogroups.com
and you'll learn something about energy.

3) olcoolone -(original poster) _ don't use a jug.
Allll you need is a 12 volts coil that you deep into your
cup of water(150ml). It takes about 40 seconds to bring the water to the boil.
If you start with ice it will take longer to boil.
I have a 12 volts coil and it works well. I bought it 20 years ago. Don't know the brand.
But they do exist.

Bluesky
AnswerID: 150266

Follow Up By: Andrew Main - Monday, Jan 23, 2006 at 13:50

Monday, Jan 23, 2006 at 13:50
What a load of patronising drivel!

Bluesky - before you suggest people go somewhere and learn something I suggest you get your overall facts right.

The basic equations for the heating of water are linear whilst moving through the liquid phase and from liquid to boiling. This means that you can measure it in monekys per month and if you have half the power to heat the water it will take twice as long.

(Please let me know if you would like me to furnish you with these equations.)

You are of course quite right that there are many other factors such as pressure (not altitude, the variable is pressure - I could heat it at sea level but if I was in a pressure chamber with a lower pressure than the outside it would boil earlier.), overall volume of liquid, shape, position of moon etc but they will have very little bearing when compared to a drop in energy, work factor, monkeys per minute etc.

The question revolves around the relative time to boil some water when compared to another method - not being pendantic about units used etc, the equations are linear in the basic form and that is what matters.

Andrew
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Follow Up By: gramps - Monday, Jan 23, 2006 at 14:25

Monday, Jan 23, 2006 at 14:25
Bluesky,

Is that one of those thingies that looks like someone removed the element from an old style jug and attached alligator clips to the trailing wires ?

I've seen those in camping equipment outlets but never really paid that much attention to them.
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Follow Up By: Mike Harding - Monday, Jan 23, 2006 at 17:41

Monday, Jan 23, 2006 at 17:41
>Mike, your calculations are incorrect regarding that problem
>using the warming up of water.

I don't think so.

Nevertheless if you're so sure perhaps you would be good enough to point out to me where I got it wrong?

>1) Energy passed from one substance to the other is called
>calories or Kilojoules and not watts Calories or Joules are
>quantity of potential and kinetic work but Watts are rate of work.

Which is why I did the calculation in kilowatt seconds and you'll find that one wattsecond is exactly equal to one Joule.

>Mike join the newsgroup called wastewatts@yahoogroups.com
>and you'll learn something about energy.

I already know something about energy.

Mike Harding
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Reply By: tonysmc - Monday, Jan 23, 2006 at 18:31

Monday, Jan 23, 2006 at 18:31
Hi Richard,

I am not sure if they are good quality or not, however the RACV shop sell a 12 volt kettle.

Tony
AnswerID: 150367

Reply By: Member - Julie P (VIC) - Tuesday, Jan 24, 2006 at 13:59

Tuesday, Jan 24, 2006 at 13:59
Well didn't your query raise a "kettle" of worms(joke!!! -get it???) anyway we have a little Waeco kettle - we always take a thermos of hot water, put that into the kettle and by the time you have cups, coffee, etc organised the kettle has boiled - no problem - also don't overfill it - better to have two small cups initialy, and boil another lot while you are drinking this - works for us - just remember to fill your thermos with boiling water every day and you can't go wrong - it is only a little thing - you can't expect miracles - especially with really cold water - makes sense doesn't it.
jules
AnswerID: 150551

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