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Portable power for water heater for pourover coffee (195-200 degrees F)
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onyxrev
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Joined: 9 May 2011
Posts: 9
Location: San Francisco, CA
Expertise: I live coffee

Posted Tue May 10, 2011, 8:46am
Subject: Re: Non-electric water heater for drip coffee (195-200 degrees F)
 

Essentially I'd have a 5-gallon water tower such as the Fetco I mentioned that would be constantly drawing power to keep the water hot.  I'm not talking bringing individual cups to a boil, just heating the water initially, taking some for a cup periodically from the reservoir, then replenishing the displaced water with fresh (cold) water from a water storage container.

I'm skeptical about the power draw too, and it'd be an expensive experiment, so any feedback from people who understand electronics more than I do is welcome.  I was looking at a pair of Kinetik 1400 cells plus a Power Bright PW2300 DC inverter.
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JasonBrandtLewis
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JasonBrandtLewis
Joined: 9 Dec 2005
Posts: 6,425
Location: Berkeley, CA
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Espresso: Elektra T1 - La Valentina -...
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Vac Pot: Yama 5-cup
Drip: CCD, Chemex
Roaster: No, no, not another...
Posted Tue May 10, 2011, 9:12am
Subject: Re: Non-electric water heater for drip coffee (195-200 degrees F)
 

Joel_B Said:

I (assuming I understand him correctly) believe the OP is wanting a pour over station.  Doing a large air pot at a time, yes, brewing just off the boil makes sense, but doing that for every cup does not.  YMMV of course.

Posted May 10, 2011 link

Actually, I had EXACTLY pourover stations in mind . . . every stand I know with a 5-/6-cup pourover station boils water on a propane stove . . . two kettles, etc., etc. -- seems to work fine for them!  ;^)

 
A morning without coffee is sleep . . .
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Joel_B
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Joel_B
Joined: 9 Oct 2007
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Espresso: Astra Mega II
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Roaster: Behmor, WP, BBQ drum
Posted Tue May 10, 2011, 9:16am
Subject: Re: Non-electric water heater for drip coffee (195-200 degrees F)
 

JasonBrandtLewis Said:

Actually, I had EXACTLY pourover stations in mind . . . every stand I know with a 5-/6-cup pourover station boils water on a propane stove . . . two kettles, etc., etc. -- seems to work fine for them!  ;^)

Posted May 10, 2011 link

Fair enough.  Never personally seen a mobile cart do a pourover.  Seems tedious to me, but then again, never had to do any production pourover.
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onyxrev
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Joined: 9 May 2011
Posts: 9
Location: San Francisco, CA
Expertise: I live coffee

Posted Tue May 10, 2011, 9:25am
Subject: Re: Non-electric water heater for drip coffee (195-200 degrees F)
 

If you take your time and schmooze with the customers it's pretty fun.  You can go as fast as you can, but that's just gonna stress everyone out.
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al_bongo
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Posted Tue May 10, 2011, 9:30am
Subject: Re: Non-electric water heater for drip coffee (195-200 degrees F)
 

Cannot fault your maths but I would redo your calculations, using R=V/I, and substitute several kOhms to account for your heating coil.
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JasonBrandtLewis
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JasonBrandtLewis
Joined: 9 Dec 2005
Posts: 6,425
Location: Berkeley, CA
Expertise: I live coffee

Espresso: Elektra T1 - La Valentina -...
Grinder: Mahlkönig K30 Vario -...
Vac Pot: Yama 5-cup
Drip: CCD, Chemex
Roaster: No, no, not another...
Posted Tue May 10, 2011, 10:07am
Subject: Re: Non-electric water heater for drip coffee (195-200 degrees F)
 

Danger! Danger! Warning, Will Robinson!  Thread Drift approaching . . .

onyxrev Said:

If you take your time and schmooze with the customers it's pretty fun.

Posted May 10, 2011 link

One thing that's always worked well whenever I've seen it in use is to use cards instead of numbers on the pourover station.  For example, instead of telling the customer that their cup is in the #1 space, or the #4 space, you can use picture post cards of (e.g.) the Golden Gate Bridge, Coit Tower, Alcatraz, etc. -- Your cup in on the Bridge, and so on.  You can also change the cards frequently (say, once a week or so), and the regulars actually set into it -- wanting their cup to be "on Candlestick" instead of on "AT&T Park," or "on City Hall} instead of "on Pier 39," and so on . . .

 
A morning without coffee is sleep . . .
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onyxrev
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Joined: 9 May 2011
Posts: 9
Location: San Francisco, CA
Expertise: I live coffee

Posted Tue May 10, 2011, 1:37pm
Subject: Re: Non-electric water heater for drip coffee (195-200 degrees F)
 

Well, just heard back from Fetco and they say they can only recommend running their products off of AC.  Makes sense that they wouldn't want to suggest doing something that could expose them to unusual technical support situations. Hmm.
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JasonBrandtLewis
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JasonBrandtLewis
Joined: 9 Dec 2005
Posts: 6,425
Location: Berkeley, CA
Expertise: I live coffee

Espresso: Elektra T1 - La Valentina -...
Grinder: Mahlkönig K30 Vario -...
Vac Pot: Yama 5-cup
Drip: CCD, Chemex
Roaster: No, no, not another...
Posted Tue May 10, 2011, 2:28pm
Subject: Re: Non-electric water heater for drip coffee (195-200 degrees F)
 

Not surprising . . .

 
A morning without coffee is sleep . . .
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onyxrev
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Joined: 9 May 2011
Posts: 9
Location: San Francisco, CA
Expertise: I live coffee

Posted Tue May 10, 2011, 4:50pm
Subject: Re: Portable power for water heater for pourover coffee (195-200 degrees F)
 

Yeah... I think I have to abandon the battery angle.  Heavy and expensive.
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