R
Rick C
Guest
On Friday, September 27, 2019 at 2:13:29 PM UTC-4, upsid...@downunder.com wrote:
1000 liters is a big tank. I thought we were talking about domestic hot water use. At this point I have no idea what you are talking about.
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Rick C.
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On Fri, 27 Sep 2019 11:03:37 -0700 (PDT), Rick C
gnuarm.deletethisbit@gmail.com> wrote:
On Friday, September 27, 2019 at 1:39:32 PM UTC-4, upsid...@downunder.com wrote:
On Fri, 27 Sep 2019 16:37:17 +0000 (UTC),
DecadentLinuxUserNumeroUno@decadence.org wrote:
upsidedown@downunder.com wrote in
news:6j8soe9pajlkktrh7rb702k8tvtp8d3ekv@4ax.com:
Storing electricity in batteries to be used several hours later to
heat water doesn't make any sense.
It makes a lot of sense, dumbass. Daytime electric costs more.
Firing this need from batteries means the meter does not spin during
the day from it. The only thing gained is a bit lower electric bill.
That is all the goal was.
USING electricity FROM batteries during the day on the HWOD units,
and THEN charging the batteries at night when the electric is cheaper..
Pretty fucking simple math there.
Damn. If you cannot even follow a simple idea, you have no chance
with anything complex.
Take a 1000 liter water tank, heat it to 95 C and then take out heat,
until the average temperature drops to 55 C, the temperature drop is
40 C or the energy stored and extracted is 40 C x 4 kJ/kg/C x 1000 kg
or 160000 kJ or 44 kWh. That is about the typical EV battery capacity.
How much does such batteries cost ? An insulated water tank is
definitively less than that.
Why are you heating water to 95°C???
To get as big delta-T as possible. The low limit is limited by the
reduced usability of only mild warm water.
Of course, I could heat to 120 or even 200 C, but that would require a
pressurized tank to avoid boiling the water.There are all kinds of
inspections for pressure vessels.
1000 liters is a big tank. I thought we were talking about domestic hot water use. At this point I have no idea what you are talking about.
--
Rick C.
+--+ Get 2,000 miles of free Supercharging
+--+ Tesla referral code - https://ts.la/richard11209