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Search: Posts Made By: TechShop
Forum: Renovations & New Construction 01-28-21, 06:32 PM
Replies: 3
Views: 917
Posted By TechShop
I pretty much agree with all of the above. As a...

I pretty much agree with all of the above.
As a long term structure, it's hard to beat reinforced concrete.

I think in-floor heating wouldn't be too terrible if one of those grid-work style...
Forum: Renovations & New Construction 12-22-20, 08:57 PM
Replies: 3
Views: 917
Posted By TechShop
Slab on grade, mins the slab...

I happened upon this is pretty interesting slab-less "slab on grade" video today (link below).

I'm intrigued, and if I build another home on my land, I'll probably consider this method. The only...
Forum: Renovations & New Construction 12-22-20, 08:53 PM
Replies: 1
Views: 940
Posted By TechShop
I have a mix of brands and honestly I don't have...

I have a mix of brands and honestly I don't have a favorite.
My system is set up with a 4 ton hydronic ground source heat pump that I build around 2015 (there's a thread around here on the GSHP...
Forum: Geothermal & Heat Pumps 12-22-20, 01:02 PM
Replies: 6
Views: 1,311
Posted By TechShop
Cool stuff! It's neat to see how other...

Cool stuff!

It's neat to see how other people tackle a problem. I like your addition of the evaporator and compressor temps.



I've been doing something similar for a few years using the...
Forum: Geothermal & Heat Pumps 09-30-17, 07:39 PM
Replies: 34
Views: 13,019
Posted By TechShop
I like it and this brings something to my mind: ...

I like it and this brings something to my mind:

I have a dehumidifier I made from a $10 second-hand window-unit that I gutted. I simply installed a drip hose into the drip-pan and placed it on a...
Forum: Geothermal & Heat Pumps 09-29-17, 02:12 PM
Replies: 37
Views: 8,315
Posted By TechShop
The main difference is in the manufacturing...

The main difference is in the manufacturing process used for each foam.

EPS starts with a bunch of tiny polystyrene beads. They pour them into a mold and then heat it all up with steam or hot...
Forum: Geothermal & Heat Pumps 09-29-17, 10:27 AM
Replies: 37
Views: 8,315
Posted By TechShop
XPS foam has far more dimensional stability than...

XPS foam has far more dimensional stability than EPS foam. The blue stuff at the local stores is usually 15 PSI structural XPS. I special-ordered 25 PSI for use under my concrete slab foundation...
Forum: Geothermal & Heat Pumps 09-29-17, 01:08 AM
Replies: 37
Views: 8,315
Posted By TechShop
Yeah, foam is a kick-*** value in a situation...

Yeah, foam is a kick-*** value in a situation like this, you get some structure and some decent R-value too.

They have 2" thick foil-covered stuff at the box-stores around here for around $23 a...
Forum: Geothermal & Heat Pumps 09-28-17, 07:52 PM
Replies: 37
Views: 8,315
Posted By TechShop
Filling the box with fiberglass is a great idea. ...

Filling the box with fiberglass is a great idea.

You could also use a large tarp or scrap piece of poly sheeting to wrap around the insulation to keep it tidy.

For the price of even the...
Forum: Geothermal & Heat Pumps 09-28-17, 07:29 PM
Replies: 37
Views: 8,315
Posted By TechShop
I use a 28 gallon electric unit in my shop. The...

I use a 28 gallon electric unit in my shop. The slab is heated, but I put it on 2" R-10 foam. My only hot water requirements are showers each day and a load of laundry once or twice a week.

If...
Forum: Geothermal & Heat Pumps 09-26-17, 01:46 PM
Replies: 21
Views: 5,644
Posted By TechShop
I think that depends on where you're at in life...

I think that depends on where you're at in life and why you're doing these projects... If you're done building and ready for some efficient heat right now (winter is approaching) you have to go...
Forum: Geothermal & Heat Pumps 09-26-17, 01:59 AM
Replies: 21
Views: 5,644
Posted By TechShop
In terms of practical efficiency gains vs cost, I...

In terms of practical efficiency gains vs cost, I agree.
Forum: Geothermal & Heat Pumps 09-25-17, 11:19 PM
Replies: 21
Views: 5,644
Posted By TechShop
If three phase compressors are used with...

If three phase compressors are used with individual VFDs, there should be no problem starting up against the pressure differential.

The trouble is that most of us are using single phase motors...
Forum: Biofuels 09-25-17, 08:40 PM
Replies: 13
Views: 7,918
Posted By TechShop
The Stirling cycle is the first thing that comes...

The Stirling cycle is the first thing that comes to mind, but in the traditional models, it would require too much of a ▲T gradient for this type of heat source.

Perhaps more applicable to the...
Forum: Biofuels 09-25-17, 02:38 PM
Replies: 13
Views: 7,918
Posted By TechShop
This is awesome to see in practice. Thanks for...

This is awesome to see in practice. Thanks for sharing.

I would imagine that with the application of these methods to modern equipment the results could be even greater.
Forum: Biofuels 09-23-17, 10:49 PM
Replies: 0
Views: 2,444
Posted By TechShop
Wood to sand to water?

I have a small (all welded steel) wood-stove and a shed next to my building. I've been thinking about welding up a box on top of the stove, placing a coil of copper in the bottom of the box and...
Forum: Geothermal & Heat Pumps 06-24-16, 05:32 PM
Replies: 21
Views: 6,654
Posted By TechShop
Thanks for linking that paper Jeff.

Thanks for linking that paper Jeff.
Forum: Geothermal & Heat Pumps 11-22-15, 07:22 PM
Replies: 7
Views: 2,563
Posted By TechShop
No offense taken. I haven't used those...

No offense taken.

I haven't used those parts in this application, so if your experience with them is that they fail, I believe it.
Forum: Geothermal & Heat Pumps 11-21-15, 02:01 PM
Replies: 7
Views: 2,563
Posted By TechShop
I like it. There is no reason you have to coil...

I like it. There is no reason you have to coil or helix your HX.

I was thinking about your epoxy end fittings. If you wanted to make them serviceable, you could use a standard water tight cord...
Forum: Geothermal & Heat Pumps 11-21-15, 12:38 PM
Replies: 5
Views: 1,803
Posted By TechShop
The temperatures are in my favor for sure. If I...

The temperatures are in my favor for sure. If I remove the insulation from a section of the loop piping, it readily condenses water. My loop water is around 46 degrees and I keep the air temp...
Forum: Geothermal & Heat Pumps 11-20-15, 11:04 PM
Replies: 5
Views: 1,803
Posted By TechShop
Ground loop water dehumidifier?

I'm considering tapping into the return line from my loop and plumbing in a small copper water/air HX with a fan. A dehumidistat would turn on the fan whenever necessary.

Has this been done? Are...
Forum: Geothermal & Heat Pumps 11-19-15, 11:26 AM
Replies: 18
Views: 5,885
Posted By TechShop
I measured an LG brand 5K unit I have here in the...

I measured an LG brand 5K unit I have here in the shop.
It has 2 parallel circuits of approximately 19 feet of copper that measures .215" OD.

Since that tubing is smaller, I would do the...
Forum: Geothermal & Heat Pumps 11-19-15, 11:07 AM
Replies: 18
Views: 5,885
Posted By TechShop
There is a less complicated approach. Why not...

There is a less complicated approach. Why not duplicate the design conditions of the original copper condenser, thus eliminating the need to change the metering device.

First, measure as closely...
Forum: Geothermal & Heat Pumps 11-17-15, 10:34 AM
Replies: 28
Views: 11,062
Posted By TechShop
Perfect! Any time you can source your parts from...

Perfect! Any time you can source your parts from the scrap pile, or the donor equipment, you're way ahead. I recall seeing similar boards in the 230v/50Hz split units I dealt with overseas. The...
Forum: Geothermal & Heat Pumps 11-17-15, 01:04 AM
Replies: 28
Views: 11,062
Posted By TechShop
Keep in mind your audience in a place like this. ...

Keep in mind your audience in a place like this. There's a special beauty in a pile of hardware assembled and functioning as it's creator intended. Either way, your bundle of jumpers and components...
Showing results 1 to 25 of 71

 
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