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Forum: Geothermal & Heat Pumps 03-03-11, 12:17 AM
Replies: 58
Views: 31,589
Posted By pick1e
I hadn't even had a chance to check but I'm sure...

I hadn't even had a chance to check but I'm sure it was nice and toasty in my yard under a foot of snow even when it was around 0°F at night. Normally, though, we don't have the luxury of that much...
Forum: Geothermal & Heat Pumps 02-06-11, 02:56 PM
Replies: 58
Views: 31,589
Posted By pick1e
There really isn't any change in the sampling...

There really isn't any change in the sampling rate. I'm manually setting a delay between samples just so I don't have more data than necessary. It takes the Arduino only a fraction of a second to...
Forum: Geothermal & Heat Pumps 02-04-11, 09:53 AM
Replies: 58
Views: 31,589
Posted By pick1e
Better Measurements

After administering a dopeslap I corrected my software to account for the increased resolution. This gave me better results but samples were still bouncing around. I played with the sampling...
Forum: Geothermal & Heat Pumps 02-02-11, 07:25 AM
Replies: 58
Views: 31,589
Posted By pick1e
That's in the works, I just haven't encased them...

That's in the works, I just haven't encased them in waterproof probes yet. :D Supposedly they are accurate to ±0.6°C across the 0-100°C spectrum. But even with them calibrated at 20°C I can see the...
Forum: Geothermal & Heat Pumps 02-02-11, 02:01 AM
Replies: 58
Views: 31,589
Posted By pick1e
I re-calibrated the LM35 sensors on the Arduino...

I re-calibrated the LM35 sensors on the Arduino tonight with a lower reference voltage to achieve better resolution. The adjustments look pretty good!
...
Forum: Geothermal & Heat Pumps 02-01-11, 12:12 AM
Replies: 58
Views: 31,589
Posted By pick1e
Calibrating sensors

I now have the Arduino with the data logger shield from Adafruit.com logging readings from 6 LM35 temperature sensors. I need to calibrate them a bit since they can each be off by 0.5°C (0.9°F).
...
Forum: Geothermal & Heat Pumps 01-24-11, 11:50 PM
Replies: 58
Views: 31,589
Posted By pick1e
My sensors are RoHS. I normally use 60/40 for...

My sensors are RoHS. I normally use 60/40 for electronics but good point, I will use some lead free for these. I should use it more often for electronics but unfortunately it just doesn't behave the...
Forum: Geothermal & Heat Pumps 01-24-11, 01:30 AM
Replies: 58
Views: 31,589
Posted By pick1e
Haven't had any time to work on the ground loop...

Haven't had any time to work on the ground loop (and it's currently 1 degree F outside) but I did receive my Arduino toys in the mail.

The Arduino Uno came assembled but the data logger shield was...
Forum: Geothermal & Heat Pumps 01-24-11, 12:48 AM
Replies: 2
Views: 3,829
Posted By pick1e
I'd say why not? Of course depends on the local...

I'd say why not? Of course depends on the local building codes... But you'd get some extra warmth- you could tell your friends that your house is partially heated by poop. Codes probably would say no...
Forum: Geothermal & Heat Pumps 01-21-11, 12:45 AM
Replies: 36
Views: 24,967
Posted By pick1e
I intend to eventually have a hybrid system by...

I intend to eventually have a hybrid system by augmenting my ground loop with solar water heaters. This would allow me to reduce the size of my ground loop because I'd use it less often, so less...
Forum: Geothermal & Heat Pumps 01-21-11, 12:39 AM
Replies: 36
Views: 24,967
Posted By pick1e
Or if you don't own land you can dig up- say a...

Or if you don't own land you can dig up- say a condo or rental like my folks. Plus with this guy if you have to move just take the unit with you and put the old furnace back in.

Two complaints...
Forum: Geothermal & Heat Pumps 01-16-11, 02:04 PM
Replies: 58
Views: 31,589
Posted By pick1e
Well lets start with the tools: 3" manual...

Well lets start with the tools:

3" manual auger from Ebay -- $45

Iron pipe extensions:
3/4" x 3' -- $6
3/4" x 5' -- $8
3/4" x 10' -- $11
1/2" x 10' -- $10
Forum: Geothermal & Heat Pumps 01-16-11, 12:37 AM
Replies: 58
Views: 31,589
Posted By pick1e
Borehole finished

The other day I was able to finish digging down to 24 ft. I'm going to call that good, it will allow me two lengths of 10' copper pipe below the frost line.

Now the question arises how to connect...
Forum: Geothermal & Heat Pumps 01-16-11, 12:00 AM
Replies: 58
Views: 31,589
Posted By pick1e
I thought about this a little more but ruled it...

I thought about this a little more but ruled it out since pipe that size goes for about $40 per 10ft section, and that would basically triple the cost per foot of my ground loop. For my shallow...
Forum: Geothermal & Heat Pumps 01-10-11, 10:48 AM
Replies: 58
Views: 31,589
Posted By pick1e
I know of the method but hadn't really looked...

I know of the method but hadn't really looked into it much because I don't know anybody who has the equipment to borrow.

My guess is that it doesn't work very well in this area due to the highly...
Forum: Geothermal & Heat Pumps 01-10-11, 12:14 AM
Replies: 58
Views: 31,589
Posted By pick1e
Enthalpy mining

Before I left town for a week I received a gift from Larry:

http://www.stottercomputers.com/GSHP/2011_01_09/ram.jpg

He brought over a nice piece of 22ft x 2in pipe sharpened at one end and a...
Forum: Geothermal & Heat Pumps 12-27-10, 08:32 AM
Replies: 58
Views: 31,589
Posted By pick1e
That's awesome! I had no idea. Thanks for posting...

That's awesome! I had no idea. Thanks for posting that.

Now that I think about it for the driveway though, you could probably get away with a passive ground loop... just turn it on for a day to...
Forum: Geothermal & Heat Pumps 12-19-10, 12:23 AM
Replies: 58
Views: 31,589
Posted By pick1e
Iraq may not have had any weapons of mass...

Iraq may not have had any weapons of mass destruction, but I do:

http://www.stottercomputers.com/GSHP/12_18_2010/breaker.jpg

Larry made this for me today. Hatchet head welded to a 12ft pipe....
Forum: Geothermal & Heat Pumps 12-18-10, 02:27 PM
Replies: 58
Views: 31,589
Posted By pick1e
I didn't even think about you having an older...

I didn't even think about you having an older house *dopeslap again* I suppose that's close to what we have around here in turn of the century farmhouses.



Yea I thought about it briefly but...
Forum: Geothermal & Heat Pumps 12-18-10, 01:56 PM
Replies: 1,943
Views: 4,653,580
Posted By pick1e
I would call it pretty good for a quick and dirty...

I would call it pretty good for a quick and dirty test actually.

2800 Btu in an hour but if you look at the first half hour I get about 4300 Btu/hr. That's pretty close to the AC unit rating of...
Forum: Geothermal & Heat Pumps 12-17-10, 08:32 PM
Replies: 58
Views: 31,589
Posted By pick1e
Thanks for the link I didn't even think to check...

Thanks for the link I didn't even think to check there. *dopeslap*



D'oh! I'm no expert but that doesn't sound very promising. Probably going to need professional drilling equipment for...
Forum: Geothermal & Heat Pumps 12-17-10, 07:57 PM
Replies: 58
Views: 31,589
Posted By pick1e
Thanks! That's a good point. I don't know exactly...

Thanks! That's a good point. I don't know exactly where our water table is but it shouldn't be very deep. I'm in the flats of Michigan that used to be lakebed. A friend told me his family had a 17ft...
Forum: Geothermal & Heat Pumps 12-17-10, 01:51 PM
Replies: 58
Views: 31,589
Posted By pick1e
Well the other day it was a nice balmy 20F (-7C)...

Well the other day it was a nice balmy 20F (-7C) and I had a little time so I went out and dug some more. I got down to 7'4" (2.23m) and was stopped by some rocks. These are a couple that I removed...
Forum: Geothermal & Heat Pumps 12-13-10, 04:43 PM
Replies: 58
Views: 31,589
Posted By pick1e
Again I appreciate the comments. I went looking...

Again I appreciate the comments. I went looking for any published data on this. There is much more to read but this one was good, a summary of borehole design research out of Sweden...
Forum: Geothermal & Heat Pumps 12-12-10, 12:59 AM
Replies: 58
Views: 31,589
Posted By pick1e
Thanks for that suggestion. Any chance you have...

Thanks for that suggestion. Any chance you have any references or data on this? It would be interesting.

I was reading something about borehole tube design saying that concentric tubes (small tube...
Showing results 1 to 25 of 57
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