The Homemade Heat Pump Manifesto - Page 60

dragvorl · 02-25-11, 05:05 PM

Quote:

Originally Posted by Xringer

On the green one, what am I looking at in the cut-away?
Are those spirals just under the skin actually small tubes?

Nope, they are not tubes, that is a single piece. The pics will explain.

Another interesting system.

Xringer · 02-25-11, 05:05 PM

I'll start the thread when I learn how to braze copper..

Kinda on the back-burner.
In the meantime, I'll edit out those pictures, which are real HTML page eaters..

dragvorl · 02-25-11, 05:09 PM

Yeah, I guess they are hard to manufacture at home, but on the other hand you can make a simple tube HE, you can even see it in the YT clip preview picture on the page before.

AC_Hacker · 02-25-11, 08:10 PM

Quote:

Originally Posted by dragvorl

Yeah, I guess they are hard to manufacture at home, but on the other hand you can make a simple tube HE, you can even see it in the YT clip preview picture on the page before.

dragvorl,

Have you come across anything that suggests how to estimate the capacity of a coaxial HX?

-AC_Hacker

dragvorl · 02-25-11, 08:42 PM

Sorry, I intended to post that. I've been told: for 9kBTU 9' long 3/8 pipe in a 1" spa tube, for 12kBTu 12' long pipe. The guy installed the 9' long in his sistem and it was working OK.

Xringer · 02-25-11, 10:54 PM

Perhaps there is a need to tweak the amount of refrigerant in a system, by a small amount?
I got to wondering how those CPU cooler guys did it..?.

I wonder if it would be possible to perform a quick and easy DIY recovery, of just a few ounces of R410A from an AC system or Mini-Split?

Maybe using an empty 20 Ounce CO2 Paintball Tank as the recovery reservoir.
The tank would be connected to the manifold gauge set, another line to the vacuum pump, with the 3rd line to the Mini-split service port.

1. Vacuum line valve open, tank valve open and draw a vacuum in the tank.
2. Close vacuum line valve, turn off vacuum pump.
3. Slowly open hose-end valve on Mini-split, drawing R410A into tank. Close valve.

The rig would look a little like this..

To add some R410A to the system, one could connect a tank of R410A,
(instead of an empty CO2 tank) to the rig..?.
R410, R410a, Refrigerant, Air Conditioner, 28.2 oz. - eBay (item 150525058517 end time Mar-25-11 17:49:41 PDT)

Drake · 02-25-11, 11:02 PM

Wish he was as detailed on heat pump as the TV. One half of the Refg system(I think heat side) must be in blue container. What is the tall 3/4" pipe for? And white coil of tube?

AC_Hacker · 02-26-11, 12:05 AM

Quote:

Originally Posted by Xringer

Perhaps there is a need to tweak the amount of refrigerant in a system, by a small amount?
I got to wondering how those CPU cooler guys did it..?.

How does this relate to Ground Source Heat Pumps?

Shouldn't this be on another thread?

-AC_Hacker

okpiddler · 02-26-11, 01:04 AM

Guys, I am Stripered with the you tube video. Glad hacker enlightened me about this forum! You guys are way more DIY friendly than the forum I studied for 3 months at the end of 09 before I did anything. Just got off of work and it is late so do not have much time now. Have you guys seen the latest video without the blue tank? That 15 gallon blue tank had about 15' of copper in it with an aquarium pump just for turbulence. of course it was the hot side. Another pump circulated that water thru my floor. The 9' was on the cold side in the white coil. I heated with that system only Feb and March of 10. It worked so well in Oct. of 10 I tore it all out and put in the factory heat exchangers, a real buffer tank and some controls. I also have a kill a watt meter. It is about 50% more efficient with the improvements. With EWT at 43 COP is about 2.95 and with EWT at 55 COP is 3.3. My heating costs have gone down about 75% over propane. And it is more comfortable and soundless. I can tell you more later and post more videos. And I can tell you what I would have done different although I am very happy with the way it turned out. I have 400' (300 is max) of 1/2 oxygen barrier tubing in my insulated slab. My pump is extra big and I am getting 1.3 GPM. 9000 Btu with 100 degree water entering the slab. This would not work well for the typical family. We keep our house cool yr. round. 60 to 65 winter and our bedroom goes down to 60 at night in the summer when it is 100 degrees outside with the water to air. My point is I do not have quite enough tubing in my slab and if the house were warmer in the winter my COP would go down. It would be harder to reject the heat into the house.

Xringer · 02-26-11, 09:59 AM

Quote:

Originally Posted by AC_Hacker

How does this relate to Ground Source Heat Pumps?

Shouldn't this be on another thread?

-AC_Hacker

Yes, maybe it should. But, you started talking about DIY recovery machines. (In this thread).
http://ecorenovator.org/forum/geothe...html#post12059 and I found it very interesting.

My post was a follow-on, asking if a super-simple DIY recovery machine
could be made for doing small amount recovery tasks.
If this scheme worked, it could be used to tweak better performance
from a CPU cooler, GSHP, ASHP & etc..

Maybe we need to categorize(?) some of these related themes..
Heat Exchangers (which would also cover ground-loops?),
Working with refrigerants, maybe DIY Electronic controls, & Etc..?.

~~
Anyways, I'll happily delete any posts you feel are too far OT..

Maybe if I un-subscribe from some of these interesting threads, I won't
see so much stuff that interests me and I'll stop posting so much!

Cheers,
Rich

02-25-11, 10:54 PM	#596
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	Vacuumed tank for DIY R410A recovery? Perhaps there is a need to tweak the amount of refrigerant in a system, by a small amount? I got to wondering how those CPU cooler guys did it..?. I wonder if it would be possible to perform a quick and easy DIY recovery, of just a few ounces of R410A from an AC system or Mini-Split? Maybe using an empty 20 Ounce CO2 Paintball Tank as the recovery reservoir. The tank would be connected to the manifold gauge set, another line to the vacuum pump, with the 3rd line to the Mini-split service port. 1. Vacuum line valve open, tank valve open and draw a vacuum in the tank. 2. Close vacuum line valve, turn off vacuum pump. 3. Slowly open hose-end valve on Mini-split, drawing R410A into tank. Close valve. The rig would look a little like this.. To add some R410A to the system, one could connect a tank of R410A, (instead of an empty CO2 tank) to the rig..?. R410, R410a, Refrigerant, Air Conditioner, 28.2 oz. - eBay (item 150525058517 end time Mar-25-11 17:49:41 PDT)

02-25-11, 05:05 PM	#592
Xringer Lex Parsimoniae Join Date: Feb 2009 Location: Woburn, MA Posts: 4,918 Thanks: 115 Thanked 250 Times in 230 Posts	I'll start the thread when I learn how to braze copper.. Kinda on the back-burner. In the meantime, I'll edit out those pictures, which are real HTML page eaters..

02-25-11, 05:09 PM	#593
dragvorl Lurking Renovator Join Date: Feb 2011 Location: NS Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Yeah, I guess they are hard to manufacture at home, but on the other hand you can make a simple tube HE, you can even see it in the YT clip preview picture on the page before.

02-25-11, 08:42 PM	#595
dragvorl Lurking Renovator Join Date: Feb 2011 Location: NS Posts: 7 Thanks: 0 Thanked 0 Times in 0 Posts	Sorry, I intended to post that. I've been told: for 9kBTU 9' long 3/8 pipe in a 1" spa tube, for 12kBTu 12' long pipe. The guy installed the 9' long in his sistem and it was working OK.

02-25-11, 11:02 PM	#597
Drake DIY Guy Join Date: Jan 2011 Location: Mpls,MN Posts: 315 Thanks: 2 Thanked 17 Times in 17 Posts	Wish he was as detailed on heat pump as the TV. One half of the Refg system(I think heat side) must be in blue container. What is the tall 3/4" pipe for? And white coil of tube?

02-26-11, 01:04 AM	#599
okpiddler Lurking Renovator Join Date: Feb 2011 Location: NE Oklahoma Posts: 15 Thanks: 0 Thanked 0 Times in 0 Posts	Guys, I am Stripered with the you tube video. Glad hacker enlightened me about this forum! You guys are way more DIY friendly than the forum I studied for 3 months at the end of 09 before I did anything. Just got off of work and it is late so do not have much time now. Have you guys seen the latest video without the blue tank? That 15 gallon blue tank had about 15' of copper in it with an aquarium pump just for turbulence. of course it was the hot side. Another pump circulated that water thru my floor. The 9' was on the cold side in the white coil. I heated with that system only Feb and March of 10. It worked so well in Oct. of 10 I tore it all out and put in the factory heat exchangers, a real buffer tank and some controls. I also have a kill a watt meter. It is about 50% more efficient with the improvements. With EWT at 43 COP is about 2.95 and with EWT at 55 COP is 3.3. My heating costs have gone down about 75% over propane. And it is more comfortable and soundless. I can tell you more later and post more videos. And I can tell you what I would have done different although I am very happy with the way it turned out. I have 400' (300 is max) of 1/2 oxygen barrier tubing in my insulated slab. My pump is extra big and I am getting 1.3 GPM. 9000 Btu with 100 degree water entering the slab. This would not work well for the typical family. We keep our house cool yr. round. 60 to 65 winter and our bedroom goes down to 60 at night in the summer when it is 100 degrees outside with the water to air. My point is I do not have quite enough tubing in my slab and if the house were warmer in the winter my COP would go down. It would be harder to reject the heat into the house.