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#1041 | |
Helper EcoRenovator
Join Date: Jun 2011
Location: Norway
Posts: 63
Thanks: 3
Thanked 10 Times in 10 Posts
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-Ko_deZ- |
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#1042 | |
Supreme EcoRenovator
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,004
Thanks: 303
Thanked 724 Times in 534 Posts
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So how is your heat pump project coming? I'm sure you are in full winter mode there where you are... Did you ever get you heat pump built and tested? I have been trying to buy one of those Fine Wire HX units. There was a guy named Viking House who posted on here, offering to sell a unit at his cost. I found out what postage would be, and the unit cost and all, but I haven't heard back from him in a couple of weeks. Could you tell me a bit more about the HRV you are using? You reported very good efficiency. I'm now in the process of finishing the insulation and sealing off my kitchen, so heat recovery ventilation is definitely on the agenda for me. All the sealing I have been doing over the years is starting to pay off. This is actually the first house I have had that was tight enough to actually be uncomfortable. As ironic as it sounds, I think it's an accomplishment. Energy costs are still too cheap in the USA for anyone except idiots such as myself and others on this eco-blog, to take energy efficiency very seriously. Thanks for any information you might pass my way. By the way, I'm still looking into CO2 sensors and the idea of demand control ventilation. I haven't forgotten. -AC_Hacker
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I'm not an HVAC technician. In fact, I'm barely even a hacker... |
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#1043 | ||||
Helper EcoRenovator
Join Date: Jun 2011
Location: Norway
Posts: 63
Thanks: 3
Thanked 10 Times in 10 Posts
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#1044 | |
Supreme EcoRenovator
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,004
Thanks: 303
Thanked 724 Times in 534 Posts
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![]() I just got this email from Randen, who is vacationing with his family in the sunny south (Argentina)...
-AC_Hacker * * *
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I'm not an HVAC technician. In fact, I'm barely even a hacker... Last edited by AC_Hacker; 12-24-11 at 02:09 PM.. |
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#1045 |
Journeyman EcoRenovator
Join Date: Jan 2011
Location: Seattle
Posts: 326
Thanks: 109
Thanked 23 Times in 18 Posts
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![]() What a great letter. Thats a lot of money to be saving a year too!
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#1046 | |
Supreme EcoRenovator
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,004
Thanks: 303
Thanked 724 Times in 534 Posts
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The part of Randen's project that I like the best is that he is combining several approaches in dealing with his heating objective:
Too many people just think of getting more heat, and they don't realize that if they can reduce heat loss, it is like getting more heat, only it lasts longer. And the solar water heating for when that is available... just great! Randen has the 'Big Picture' approach. -AC_Hacker
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I'm not an HVAC technician. In fact, I'm barely even a hacker... |
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#1047 | |
Apprentice EcoRenovator
Join Date: Mar 2011
Location: SE Wisconin
Posts: 107
Thanks: 3
Thanked 11 Times in 9 Posts
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I have another question though, I'm going to be running in temps between 30*-40*F, and trying to keep the hottub at least 102*F, will my heat pump even be able to achieve that Delta T? Adam |
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#1048 |
Journeyman EcoRenovator
Join Date: Jan 2011
Location: Seattle
Posts: 326
Thanks: 109
Thanked 23 Times in 18 Posts
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![]() More questions for hacking a heat pump...... when brazing the refrigerant line, you would use nitrogen or propane if your brave. The deposit for a nitrogen bottle is about $100 and the fill is about $25.
Why couldn't we use a portable air tank and fill it at the local Discount Tire or Costco? Both of them in our area use nitrogen for filling tires. |
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#1049 | ||
Supreme EcoRenovator
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,004
Thanks: 303
Thanked 724 Times in 534 Posts
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So here's the story: Propane works as a purge gas, but just because it works and is readily available and is cheap is no reason to use it. Because it is so dangerous I can't recommend that anyone else use propane as a purge gas. Quote:
The nitrogen idea sounds pretty good, if it is really nitrogen. Some people think CO2 would work out. Daox tried it and said it worked fine. I haven't tried it myself, so I can't speak from personal experience. For HVAC work you want a dry, inert gas. argon would work, and it's expensive, but you might already have it in your welding kit. -AC_Hacker
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I'm not an HVAC technician. In fact, I'm barely even a hacker... Last edited by AC_Hacker; 12-28-11 at 12:36 AM.. |
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#1050 |
Apprentice EcoRenovator
Join Date: Mar 2011
Location: SE Wisconin
Posts: 107
Thanks: 3
Thanked 11 Times in 9 Posts
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![]() AC, you haven't posted an update on your personal system in a while, how are things coming with it? Any performance updates or things you've learned? Did you have time to do anything with the portable ac/hp you got?
Inquisitive minds would like to know, Adam |
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Tags |
air conditioner, diy, gshp, heat pump, homemade |
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