Forum: Biofuels
02-29-12, 02:40 PM
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Replies: 70
Views: 141,561
Here are a couple of photos of the latest wood...
Here are a couple of photos of the latest wood stove secondary burn modification. The first picture is the overhang that needed to be cut to make room for the secondary burn fresh air supply.
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Forum: Geothermal & Heat Pumps
02-27-12, 03:53 AM
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Replies: 245
Views: 235,755
Some pics of home made drilling machine
Here are some pics of machine I built and used. I will post description bellow.
The whole unit where I was drilling:
http://img560.imageshack.us/img560/9223/dsc1569b.th.jpg...
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Forum: Geothermal & Heat Pumps
02-13-12, 08:41 AM
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Replies: 11
Views: 17,162
Heat pump COP degrades as outdoor temps drop. ...
Heat pump COP degrades as outdoor temps drop. Just a result of the fixed outdoor heat exchanger surface area and limited min refrigerant temperature inside of it. Basic thermal physics I suppose.
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Forum: Geothermal & Heat Pumps
02-11-12, 07:46 AM
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Replies: 6
Views: 8,990
I feel the residential heating by ASHP is not...
I feel the residential heating by ASHP is not specially challenging in N-America,if the widgets ,supplied locally, could only somehow manage -15degC with reasonable COP (>>1,5).
In N-Europe...
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Forum: Other Improvements
02-06-12, 01:23 PM
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Replies: 10
Views: 12,661
Interesting idea.
Some things to keep in...
Interesting idea.
Some things to keep in mind, when your furnace fires, the fuel can reach very high temperatures (400F to 600F and higher), so the area of the furnace's HX does not need to be...
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Forum: Appliances & Gadgets
02-02-12, 10:00 AM
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Replies: 6
Views: 9,089
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Forum: Biofuels
02-01-12, 03:26 PM
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Replies: 8
Views: 14,617
Compact Gasifier - wood-gas stove
Hey Guys,
I was over helping out at a friend's the other day. He has been working on a small gasifier stove.
The first two videos are ones he shot of the construction. The last video is what I...
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Forum: Geothermal & Heat Pumps
01-26-12, 09:22 AM
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Replies: 6
Views: 8,990
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Forum: Geothermal & Heat Pumps
01-25-12, 06:06 PM
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Replies: 1,943
Views: 5,531,876
Hate to disappoint you...
The basic idea...
Hate to disappoint you...
The basic idea behind GSHP is that you are harvesting solar energy that has been stored in many, many, many tons of earth.
A good approximation of the heat that can be...
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Forum: Geothermal & Heat Pumps
01-25-12, 04:59 PM
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Replies: 6
Views: 8,990
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Forum: Conservation
01-21-12, 09:34 AM
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Replies: 6
Views: 13,265
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Forum: Geothermal & Heat Pumps
01-19-12, 08:33 PM
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Replies: 1,943
Views: 5,531,876
* * *
The Homemade Heat Pump Manifesto has...
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The Homemade Heat Pump Manifesto has gone past 200,000 hits.
Thank you to readers both for reading and for your good questions, thank you to the brave experimenters who had the gumption...
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Forum: Biofuels
01-19-12, 06:33 PM
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Replies: 13
Views: 25,363
Inlet and outlet temps stay around the temp of...
Inlet and outlet temps stay around the temp of the water in the water heater. The whole system holds less than 4 gallons I'm guessing.
The pump is a three speed circulator pump set on the lowest...
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Forum: Conservation
01-04-12, 09:42 PM
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Replies: 41
Views: 40,638
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Forum: Conservation
01-04-12, 09:25 PM
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Replies: 41
Views: 40,638
Reducing the output of a furnace(derating) is...
Reducing the output of a furnace(derating) is dangerous in that if not a high enough temperature inside the heat exchanger is reached then the there will be condensation in the heat exchanger and the...
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Forum: Conservation
01-04-12, 03:13 PM
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Replies: 41
Views: 40,638
First things first I'd figure out why your...
First things first I'd figure out why your furnace is short cycling. How long is the average on and off time?
If you truely are heating up the house THAT fast (and I find that hard to believe),...
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Forum: Conservation
12-06-11, 09:21 AM
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Replies: 8
Views: 9,076
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Forum: Conservation
11-11-11, 12:03 PM
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Replies: 10
Views: 45,599
Poorman's Thermal Shade experiment
Last night, I was especially cold.
My thermostat said it was 68 degrees, but it sure didn't feel like it.
The reason why is that I have a fair number of windows. Even though the house has...
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Forum: Renovations & New Construction
09-29-11, 03:18 PM
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Replies: 13
Views: 21,842
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Forum: Energy Storage
11-25-10, 04:18 AM
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Replies: 34
Views: 185,291
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Forum: Conservation
02-28-10, 05:12 PM
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Replies: 575
Views: 1,304,229
ERV, HRV, de-humidifier hack...
Piwoslaw,
Here's a URL for a DIY Heat Recovery Ventilator:
Make - Volume 18 (http://www.make-digital.com/make/vol18/?pg=58)
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The photos I see of Heat Recovery Ventilators usually...
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