Re: Reducing power consumption of water heaters

Pluto wrote:
"Don Lancaster" <don@xxxxxxxxxx> wrote in message news:4pdh4cFidb75U1@xxxxxxxxxxxxxxxxx

Pluto wrote:

"Angelo Campanella" <a.campanella@xxxxxxx> wrote in message news:FFfYg.274429$QM6.264481@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx


Pluto wrote:



The original post in this thread refer to Instant water heaters.
Not the overhead tank types where water is heated and stored.

Angelo Campanella


The problem is that instantaneous water heaters do not provide nearly enough hot water. And basically piss people off.
Besides requiring outrageous rewiring costs.

And putting horrendous surges on the power line.

For maximum efficiency, they also would require proportional power control rather than a cold water mix. Requiring fancy control electronics.


Don, Pl explain what you mean by proportional power control
before we go further into efficiency and related maths.
Pluto





Do the math:

1 BTU = 0.2931 watthours
1 gallon degree = 1.172 watt hours at 8 pounds per gallon
50 degree gallon summer rise = ~60 watthours
1 gallon 50 degree rise in ten seconds = 2160 watt hours or a 20 amp 110v service for 6 gpm flow. Or total exclusive use of a 30 amp service for winter water.

Assuming perfect insulation, etc...

This is one possible future application of supercaps that may actually be useful.

--
Many thanks,

Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: don@xxxxxxxxxx

Please visit my GURU's LAIR web site at http://www.tinaja.com





Here is a typical unit...

PowerStar AE115 – can support one major hot water application(ie shower) at a time in a warm environment. To see where the AE115 can be used reference our climate map. This model has two heating elements and each requires its own 40 amp breaker, so the AE115 requires 2 separate 40 amp breakers and a total minimum electrical service of 150 amps.

If instant hot water is costly, it makes no sense to mix it with cold water to make warm water. You create all your water by heating just enough.

--
Many thanks,

Don Lancaster voice phone: (928)428-4073
Synergetics 3860 West First Street Box 809 Thatcher, AZ 85552
rss: http://www.tinaja.com/whtnu.xml email: don@xxxxxxxxxx

Please visit my GURU's LAIR web site at http://www.tinaja.com
.

Relevant Pages

  • Re: Reducing power consumption of water heaters
    ... Pluto wrote: ... Not the overhead tank types where water is heated and stored. ... Besides requiring outrageous rewiring costs. ... they also would require proportional power control rather than a cold water mix. ...
    (sci.energy.hydrogen)
  • Re: Reducing power consumption of water heaters
    ... Pluto wrote: ... Not the overhead tank types where water is heated and stored. ... Besides requiring outrageous rewiring costs. ... they also would require proportional power control rather than a cold water mix. ...
    (sci.energy.hydrogen)
  • Re: OT: Engineers quiz
    ... scientific community generally no longer considers Pluto to be a planet. ... make a pure water ice cube sink in a glass of water? ... one in the middle and two on the bottom. ...
    (rec.gambling.poker)
  • Re: Reducing power consumption of water heaters
    ... Not the overhead tank types where water is heated and stored. ... Besides requiring outrageous rewiring costs. ... they also would require proportional power control ... Or total exclusive use of a 30 amp service for ...
    (sci.energy.hydrogen)
  • OT: Engineers Quiz answers
    ... Before Pluto was discovered, which planet was furthest from the Sun? ... Without adding anything to either the ice cube or the water, ... weight rise or lower? ...
    (rec.gambling.poker)