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John, thanks for the note. My GSHP HVAC / Energy monitoring system simply illustrates good GSHP/HVAC principles - thanks for the supportive comment. Many concepts in this long thread are well...
I too am watching if / how much my borehole field temperature changes long term over a period of years.
So far I've collected 2 of the 7 years of Entering Water Temperature data that's supposedly...
I was just trying to provide some factual support for what Shophound said, noting that my location is (relatively) the same as his (DFW), and that I have an HVAC monitoring system (...
Here's an example of what Shophound is talking about, specific for his DFW location/climate.
The red line is outside temperature - it got past 102° (F) on July 2nd (red line). Yet outside RH...
Here's an illustration of compressor discharge temperature as a function of cooling vs. heating mode, for an R410A geothermal system (WaterFurnace Envision 3 ton 2 stage variable speed closed loop...
08-15-2008, 11:29 AM
shophound, with the changed weather pattern the last few days, from the almost daily continuous sunshine to cloud cover, I've noticed that there appears to be an additional variable that affects...
08-09-2008, 12:40 PM
Shophound, yep, I agree. Every time the blown-in insulation is disturbed, heat flow resistance performance is degraded. In my case I've started using fiberglass batts as additional insulation in...
08-09-2008, 12:44 AM
The RH 1-wire sensors I use are hermetically sealed and thus are ideally suited for installation into the return and supply plenums. Take a look at...
08-09-2008, 12:36 AM
We had it done, a blower door test, for my house, a year or so after the house was built. We failed the test - couldn't get any measureable degree of negative pressure. Too many ceiling open-style...
08-08-2008, 06:42 PM
This image shows a couple of 1-wire technology temp sensors on my 2" HDPE GSHP entering and leaving water loop pipe. It reasonably illustrates sensor hook-up and what is meant by 'linear topology:'...
08-08-2008, 02:28 PM
Shophound, I've been keeping up with your posting here on how the attic can affect house envelope heating, along with TB's posting on RH. These threads have been helpful reading, and I'm...
08-08-2008, 12:10 AM
Another data logging system to consider is this one:
http://www.welserver.com/index.htm . It's the one I use. I live in the same DFW area as you. Here's an example of my attic using...
Chris, your time/effort to respond is much appreciated.
I'm going to pursue the link you provided - this is very helpful. Thanks.
For my actual installation, perhaps I can find someone who...
I believe the 68° deep earth temp is what it would be only if heat wasn't being dumped into the earth. In my case, at the moment, I'm dumping about 650 KBTU/day, or about 20 MBTU/month, into the...
I agree, but don't know why.
My EWT at the moment ranges from 76 - 84°F, depending on time of day and/or amount of heat being rejected (about 750 KBTU per day, at about a 30 - 82 KBTU/hr rate). ...
Bob, in general, the DeSuperHeater option on your GSHP unit is only operational (i.e., heats water) when the your GSHP unit is running - i.e., water loop pump(s), compressor and blower.
07-30-2008, 03:43 PM
1. Clearly, don't put it in, spending tens of thousands of dollars, until you've found a contractor you're comfortable with.
2. Increase your chances of finding a contractor you're...
Bob, since you and I have the same Envision model, here's a picture similar to what I think you have:
Bottom two pipes go to the loop...
07-29-2008, 07:11 PM
Like the WaterFurnace Envision units, the ClimateMaster Tranquility units also probably have very large surface area evap coils, which contribute a lot to humidity reduction. I don't have any...
07-29-2008, 06:37 PM
This is exactly the case for me - often my (two) units run separately, into the full loop.
07-29-2008, 06:30 PM
I have a data logger on my GSHP system - see http://welserver.com/WEL0043/ . Two WaterFurnace Envision units, 2 stage, variable speed, 8 ton vertical well field.
Easy to implement.
07-29-2008, 06:21 PM
I am surprised that it is more cost economical to put in 3 separate loops, versus 1 big loop.
I have 2 units (WaterFurnace Envision 5 and 3 ton) of similar performance to your ClimateMaster units....
Bob, when I responded above, I missed the signifance of your comment quoted above.
If you meant to say that your LWT is 88° and your EWT is 87°, and you're confident that you understood this to...
Bob, put together some kind of KWH monitor, and during the day, run a test. Turn off your HVAC and everything not normally used - lights, ceiling fans, televisions, XBox360s, Wiis, cable tv set top...
I recommend you consider going up another foot for the main level, to 10' ceilings, especially if you have an open floor plan. The illusion of a much more dramatic living area is heightened just...
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