EcoRenovator  

Go Back   EcoRenovator > Improvements > Geothermal & Heat Pumps
Advanced Search
 


Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read


Reply
 
Thread Tools Display Modes
Old 11-20-15, 07:28 AM   #101
MEMPHIS91
Journeyman EcoRenovator
 
MEMPHIS91's Avatar
 
Join Date: Apr 2015
Location: Oxford, MS USA
Posts: 496
Thanks: 69
Thanked 87 Times in 61 Posts
Default

Mejunkhound, sadly I don't have that kinda space. And I am going to use copper in copper because I want to have the refrigerant on the outside of the water pipe. I'm thinking the coils help the water "stir" around in the pipe more too. Not sure how long it needs to be but the picture doesn't make it look very long. I'm thinking 1" inside of 1.5" copper tubing.

__________________
שְׁמַע יִשְׂרָאֵל ה' אֱלֹהֵינוּ ה' אֶחָד
MEMPHIS91 is offline   Reply With Quote
Old 11-20-15, 08:28 AM   #102
jeff5may
Supreme EcoRenovator
 
Join Date: Jan 2010
Location: elizabethtown, ky, USA
Posts: 2,369
Thanks: 389
Thanked 600 Times in 502 Posts
Send a message via Yahoo to jeff5may
Default

I guess bbp decided not to use these hx coils in his monster solar heat pump water furnace project. If you are looking to buy a hx, that one is the bees knees for what you have planned. Just be aware that you will need a filter before it in your water supply. And I would definitely incorporate temperature and flow sensing in your control scheme. It would be worth the time and money spent the first time it saved the turbotec hx.
jeff5may is offline   Reply With Quote
Old 11-20-15, 08:45 AM   #103
MEMPHIS91
Journeyman EcoRenovator
 
MEMPHIS91's Avatar
 
Join Date: Apr 2015
Location: Oxford, MS USA
Posts: 496
Thanks: 69
Thanked 87 Times in 61 Posts
Default

Well if he wants to sell them, OR donate to an awesome project..... Seriously I might want one.

I was thinking something like this for a filter 4 Ton Evaporator Coaxial Spiral Heat Exchanger Condenser | eBay

Maybe fine one cheaper though.
__________________
שְׁמַע יִשְׂרָאֵל ה' אֱלֹהֵינוּ ה' אֶחָד
MEMPHIS91 is offline   Reply With Quote
Old 11-20-15, 12:54 PM   #104
superlen
Helper EcoRenovator
 
Join Date: Nov 2015
Location: NW Arkansas
Posts: 37
Thanks: 5
Thanked 7 Times in 7 Posts
Default

Memphis,

I have a packless 5T coaxial. I can measure for you this weekend if you like, but I'm guessing it's probably 20' if unrolled. My suggestion is go as big as you can....monster size if possible. You can always pump the water through slower if you need to, enjoying the lower pump amp draw.

Len
superlen is offline   Reply With Quote
The Following User Says Thank You to superlen For This Useful Post:
MEMPHIS91 (11-20-15)
Old 11-20-15, 01:00 PM   #105
superlen
Helper EcoRenovator
 
Join Date: Nov 2015
Location: NW Arkansas
Posts: 37
Thanks: 5
Thanked 7 Times in 7 Posts
Default

Quote:
Originally Posted by mejunkhound View Post
Don't bother trying to coil it, simply use straight pipes, 180 deg bend at one end.


Own house has 5T HE, 80 ft of 3/4 Cu pipe inside 1-1/4" PVC pipe. 40 ft across basement ceiling and back. Sloped to control return oil flow of course.
I like this concept.

It seems like this would provide a very efficient HEX without the hassle of coiling. Plus, it makes your basement look awesome! Is this the system you posted some temps/flow rates on in another recent thread? How did you seal the ends where the 3/4" copper exited?

Len
superlen is offline   Reply With Quote
Old 11-20-15, 07:45 PM   #106
superlen
Helper EcoRenovator
 
Join Date: Nov 2015
Location: NW Arkansas
Posts: 37
Thanks: 5
Thanked 7 Times in 7 Posts
Default

Memphis,

My coil is 6 turns at around 13". That works out to just over 20'. I'm a good guesser. It's rated for 5T, but obviously it matters how much gpm you an flow through it. A larger unit would move the same heat with less gpm & vice versa.

Len
superlen is offline   Reply With Quote
Old 11-20-15, 07:57 PM   #107
MEMPHIS91
Journeyman EcoRenovator
 
MEMPHIS91's Avatar
 
Join Date: Apr 2015
Location: Oxford, MS USA
Posts: 496
Thanks: 69
Thanked 87 Times in 61 Posts
Default

Awesome info! Do you know pipe sizes? And would you mind taking a picture?
__________________
שְׁמַע יִשְׂרָאֵל ה' אֱלֹהֵינוּ ה' אֶחָד
MEMPHIS91 is offline   Reply With Quote
Old 11-21-15, 01:33 PM   #108
superlen
Helper EcoRenovator
 
Join Date: Nov 2015
Location: NW Arkansas
Posts: 37
Thanks: 5
Thanked 7 Times in 7 Posts
Default

I took some pics last weekend and I'll get them uploaded, hopefully today. (Having some phone usb issues).

In the meantime here are some approx sizes. This is an older single wall coaxial that was made before the twisted/fluted/contoured inner pipe design became common. I haven't cut it open, but I'm assuming its just smooth pipe rolled inside a larger smooth pipe.

Outside tube is around 1.25" and refrigerant flows in it, stubbed out with 5/8" line. The inside tube is 3/4" and water flows through it, again I assuming it's just smooth wall 3/4" copper. The model number sticker is still on it and at one time I had the datasheet downloaded. I will try and locate again & post link.

Len
superlen is offline   Reply With Quote
The Following User Says Thank You to superlen For This Useful Post:
MEMPHIS91 (11-21-15)
Old 11-21-15, 02:46 PM   #109
MEMPHIS91
Journeyman EcoRenovator
 
MEMPHIS91's Avatar
 
Join Date: Apr 2015
Location: Oxford, MS USA
Posts: 496
Thanks: 69
Thanked 87 Times in 61 Posts
Default

Awesome! I was thinking 25 feet of 1.5" outside, 1" inside. If your is 5 ton, my 4 ton should be great!
Jeff what is the exact username for bbq? I would like to message him.
__________________
שְׁמַע יִשְׂרָאֵל ה' אֱלֹהֵינוּ ה' אֶחָד
MEMPHIS91 is offline   Reply With Quote
Old 11-21-15, 03:24 PM   #110
jeff5may
Supreme EcoRenovator
 
Join Date: Jan 2010
Location: elizabethtown, ky, USA
Posts: 2,369
Thanks: 389
Thanked 600 Times in 502 Posts
Send a message via Yahoo to jeff5may
Default

Quote:
Originally Posted by MEMPHIS91 View Post
Awesome! I was thinking 25 feet of 1.5" outside, 1" inside. If your is 5 ton, my 4 ton should be great!
Jeff what is the exact username for bbq? I would like to message him.
EcoRenovator - View Profile: buffalobillpatrick

Beware: that man is an evil genius. The control scheme he came up with using a few uno boards and some spare parts confused me almost as much as his heat store plumbing. I wonder how it has been performing. Haven't heard anything about it since last winter.

jeff5may is offline   Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:29 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design