You've not heard of a cafetiere then?
Personally, I'd rather have a nice cup of tea!
There are no words LOL
I sell tea too - herbal ones LOL
Discuss Mobile Barista at wits end! in the Electrical Forum area at ElectriciansForums.net
You've not heard of a cafetiere then?
Personally, I'd rather have a nice cup of tea!
WOW! Thank you so much for your extensive and very interesting and informative reply! It really is very very much appreciated!! Whilst I couldn't fathom most of the maths (without a lot more coffee), I'm coming to the conclusion that batteries aren't feasible.
How are you heating the water for the coffee?
We know a guy on here who can instantly boil water for free...
He’s definitely worth a shout!
You will need a pair of spoons
Problem with that is it’s perpetual. You can’t turn it off once it’s on.
That’s a lot of coffee to be drinking.
I would think that any event these days would offer a power socket for any exhibitor or caterer that required it.
If they are the ones that say you can’t use generators, they have to supply an alternative.
I don't think anyone was suggesting using 6V, only building the battery out of 6V blocks.I would run far far away from a 6v system. A 24 volt would be much better
I wonder if there is any way that you could make me understand why? The explanation will need to be very very basic
I am struggling to find the Yuasa GC200 batteries for sale online.
I don't think anyone was suggesting using 6V, only building the battery out of 6V blocks.
The lower the voltage, the higher the current required for a certain power (they are inversely proportional, half the voltage requires twice the current etc.). The higher the current, the greater the voltage drop in the resistance of the cables, isolator, inverter electronics etc. But at the same time, there's less voltage available to be dropped, e.g. 0.6V drop represents 10% loss at 6V, but only 5% at 12V and 2.5% at 24V.
The result is that for a given wiring setup, the losses decrease as the inverse square of the voltage. For a given wiring system handling a given wattage, doubling the voltage reduces the loss by a factor of four. Put another way, to achieve the same loss level, at 6V the wiring and accessories need to be 16 times as heavy as for 24V, meaning a lot of copper! FWIW there aren't 6V inverters, but even a 12V system requires four times the cable size and four times as many transistors in the inverter, etc, to achieve the same efficiency as a 24V equivalent. At low powers, this makes little difference. At the power levels you require, even 24V is copper-heavy and 48V would be better, although this tends to increase the cost and size of batteries because of the greater number of individual cells. I expect the happy medium would be 24V.
I just pulled the type number out of the Yuasa catalogue at random because it had nice round numbers. Their suggested application was automatic guided factory vehicles. There are hundreds similar.
if you had my set up, what would you have?
A Showmans steam road loco. Loads of hot water available free from the injector spill, up to 30 kilowatts of leccy from the dynamo, handy puffs of steam from the water gauge blowdown for frothing milk, enough grunt to pull a dozen vending trailers and a unique atmosphere and selling point. You could italianise the name to make it seem more authentically coffee-related. 'Avelino e Portio - caffè cilindrico direttamente dal motore'.
Double your voltage half your current. Need less copper, 24 volt inverters are more efficient. Your batteries are not going to have to work as hard.I wonder if there is any way that you could make me understand why? The explanation will need to be very very basic
Yuck! Herbal tea! Get thee behind me Satan!There are no words LOL
I sell tea too - herbal ones LOL
herbal tea and bitter coffee, YUK. ...convert to a mobile real ale bottle bar, then all you need is a cooler set to 10 deg.C, 52 deg.F.
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