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Posted by Bubba on July 29, 2007, 11:27 pm
wrote:
>Would you not only get have of or close to the 50% usage of the hot water.
>for Example...a 40 gal electric HWT usually gives about 25-28 gal of hot
>water before trailing off. And if it is dead winter here, with ground water
>about 8 - 10° lower than normal, you get alot less hot water before trailing
>off
?? You might be losing me here a bit. The dead of winter on a
geothermal heat pump is very different than an air to air heat pump.
On a zero degree day in the winter with an air to air heat pump, you
are basically going from a zero degree change to a 70 degree change in
your home. With a geothermal on a zero degree day you are really
starting at about a 55 degree temperature. It takes a lot less energy
to bring that 55 to 70 compared to 0 to 70.
When its zero outside your geo will be running a bit more than normal
due to the loss of temperature through the building. Thus, it will be
producing heat available to heat the water in your tank.
If the ground water temperature is lower (as it will be in the winter)
it will affect the tank of a electric water heater and a geothermal
used tank basically the same.
(This is all a very simplistic explaination to help you understand.
I'm not qulaified to try and explain the physics of all these
processes).
Bubba
>
>
>> wrote:
>>
>>>In a domestic HWT....the top thermostat heats first...since heat rises,
>>>then
>>>when that thermostat is satisfied, it opens and at the same time it closes
>>>the circuit tot he bottom. So both should de set at the same temp or
>>>within
>>>a few degrees. The Geo-thermal is to assist the HWT with whatever it can.
>>>It
>>>does not provide the main and enough heated water to do the job.
>>>And since I have not seen the installation..the Geo might use the HWT tank
>>>as a heat exchanger in some way to assist the GEO
>>>
>>>And then there is the other idea...I most likely don't know my ass from a
>>>hole in the ground
>>>
>> Your "other idea" is correct this time. :-) Regular water heating
>> gets both stats set the same.
>> Geothermal is different. The lower element gets set to 95 on the last
>> Climatemaster geo. The upper element gets set to whatever temp you
>> like your water at.
>> If you set them both at the same temp (say 125) then whats the sense
>> of trying to use the geo to heat your domestic water?
>> Bubba
>>>
>>>>> On Sat, 28 Jul 2007 15:22:37 -0700, an...@siu.edu wrote:
>>>>> >On Jul 28, 5:16 pm, .p.jm@see_my_sig_for_address.com wrote:
>>>>> >> On Sat, 28 Jul 2007 14:59:27 -0700, an...@siu.edu wrote:
>>>>> >> >I recently had a Carrier geothermal system installed in my new
>>>>> >> >home.
>>>>> >> >The question I have is about it producing hot water. There are 2
>>>>> >> >pipes that connect to my hot water heater going into the system,
>>>>> >> >HWG
>>>>> >> >in and HWG out. The HWG in comes from the bottom of the hot water
>>>>> >> >heater and the HWG out goes to top of the hot water heater. I've
>>>>> >> >been
>>>>> >> >unsure if the system is producing hot water like it should. The
>>>>> >> >top
>>>>> >> >pipe comming out of the geothermal system is always either the same
>>>>> >> >temperature or colder than the pipe going in. I put a temperature
>>>>> >> >prope on it to test it. Would this be right, shouldn't the top
>>>>> >> >pipe
>>>>> >> >coming out be hotter than the pipe going in? I tested it for
>>>>> >> >several
>>>>> >> >days now all throughout the day and this seems to be happening,
>>>>> >> >even
>>>>> >> >without running any hot water. It seems though that when we do run
>>>>> >> >hot water, the pipe comming out of the system going to the hot
>>>>> >> >water
>>>>> >> >heater is very cold, yet the pipe coming in is hot to the
>>>>> >> >geothermal
>>>>> >> >system. Is this normal, and how else can I verify that the system
>>>>> >> >is
>>>>> >> >making hot water?
>>>>>
>>>>> >> Open a faucet. Use the knob of the left to do it. Stick
>>>>> >> your
>>>>> >> hand under it. See if you scream.
>>>>>
>>>>> >> --
>>>>> >> Click here every day to feed an animal that needs you today
>>>>> >> !!!http://www.theanimalrescuesite.com/
>>>>>
>>>>> >> Paul ( pjm @ pobox . com ) - remove spaces to email me
>>>>> >> 'Some days, it's just not worth chewing through the restraints.'
>>>>> >> 'With sufficient thrust, pigs fly just fine.'
>>>>> >> HVAC/R program for Palm PDA's
>>>>> >> Free demo now available onlinehttp://pmilligan.net/palm/
>>>>>
>>>>> >That wouldn't be an accurate test because my electric hot water heater
>>>>> >is set to 110 at the bottom and 125 at the top. So the geothermal is
>>>>> >supposed to heat up what it can and leave the rest up to the hot water
>>>>> >heater.
>>>>>
>>>>> You might want to look at the recommended water heater settings with
>>>>> that geothermal system. You gotz the bottom one way too high.
>>>>> Bubba
>>>>
>>>> Both are set to what the manufacturer recommends. Bottom one is set
>>>> to 110F
>>>>
>>>
>
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