Curious what total cost you figure for a 600 gal , insulated, unpressurized drainback, with output heat exchange capable of 100 gal ,at 3gal/min, of 120 * F supply water from 125* tank temp ?

Ken


----- Original Message ----- From: "Karl Schwingel" <[EMAIL PROTECTED]>
To: "RE-wrenches" <[email protected]>
Sent: Friday, August 29, 2008 8:54 AM
Subject: Re: [RE-wrenches] Hot Water Tanks


I've been using fibreglass tanks from Design Tanks in South dakota.
a rather large variaty of sizes from 150 gal to 8000 gal. you can get fittings wherever you want, and can get sectional tanks (to 800 gal) for assembly in small rooms (go thru a 28" door, assemble inside.) good to 180 F,

could part of the problem be that the tarms might go to higher temps than the EPDM can handle. Just a thought, since flatplate panels are sort of self temperature limiting.

Karl Schwingel
NABCEP certified Solar Thermal Installer
Northwind Renewable Energy LLC
Stevens Point, Wi.




David Palumbo wrote:
Ken,

Appear to be leaking from where heat exchangers contact bottom.
I do not know the specific tank temps as these were not my tanks, or
customers tanks.
No, sidewall penetrations.

What tank lining material have you worked with? And how have they been
holding up?

Dave



-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Ken
Schaal
Sent: Thursday, August 28, 2008 9:27 AM
To: RE-wrenches
Subject: Re: [RE-wrenches] Hot Water Tanks


Dave and others-

Where and how do these leaks occur?
Stress at points of contact with bottom of copper coils?
Deterioration of the EPDM over time? at what average and maximum temps?
Sidewall penetrations below water level?

Other issues?

Thanks
Ken Schaal
CommonWealth Solar


----- Original Message -----
From: "David Palumbo" <[EMAIL PROTECTED]>
To: "RE-wrenches" <[email protected]>
Sent: Thursday, August 28, 2008 9:00 AM
Subject: Re: [RE-wrenches] Hot Water Tanks



We have experience with STSS tank's. Lot's of Tarm's installed around here in the past 10 years with that tank. Too many of the tanks leak after 8 to
10 years. That's why we decided to make our own tank.

Dave

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Jeff
Blick
Sent: Wednesday, August 27, 2008 5:28 PM
To: [email protected]
Subject: Re: [RE-wrenches] RE-wrenches Digest, Vol 1, Issue 95



Hiya Dave,
We installed an STSS tank at a very large thermal system in Colorado this past winter. Check out their website, excellent product. If nothing else
this will give you a jumping off point in your research efforts.  The
website is stsscoinc.com.  Good to hear from you the other day...talk to
you
soon.......


Jeff Blick
PV installer
Sunlight Solar Inc.
4 NW Franklin
Bend, OR 97701
direct: 541-306-4196
fax: 541-322-1911
[EMAIL PROTECTED]
www.sunlightsolar.com

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of
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Sent: Wednesday, August 27, 2008 10:37 AM
To: [email protected]
Subject: RE-wrenches Digest, Vol 1, Issue 95

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Today's Topics:

  1. Re: Hot water tank liner recommendations? (David Palumbo)
  2. Re: Hot water tank liner recommendations? (Aaron Wellendorf)
  3. Sunny Boy 6000U (marco)


----------------------------------------------------------------------

Message: 1
Date: Tue, 26 Aug 2008 22:25:53 -0400
From: "David Palumbo" <[EMAIL PROTECTED]>
Subject: Re: [RE-wrenches] Hot water tank liner recommendations?
To: "RE-wrenches" <[email protected]>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset="iso-8859-1"

Wrenches,

Does anyone have a recommendation for a waterproof material to line a 950 gallon hot water storage tank? This insulated storage tank will have heat
exchange coils from a wood fired Tarm boiler as well as from SHW
collectors.
The liner must be able to withstand temperatures of 180 degrees F.

We have had recommendations that include EDPM roofing membrane, and pond
liner material http://www.firestonesp.com/pondgard.asp?sub=b1a and
http://www.firestonebpe.com/lining/tech_data/tech_guidelines/_down/_en/T
and
http://www.firestonebpe.com/lining/tech_data/tech_guidelines/_down/_en/T

Also, there is a concern that these tank liners have leaked in the past
because the bottom of the tank liner was eventually penetrated due to poor
protection from the stress of having the copper heat exchanger coils
sitting
on it. I'm wondering if closed cell blue(or pink) board insulation would
be
a good choice for this duty. Will it hold up over the years at temps up to
180F? As an alternative we could mill up some local Hemlock wood to
separate
the coils from the liner. Hemlock has been used for years to build spring boxes out of, the reputation being "that as long as the wood stays wet it
will last for decades".

And, is there a water treatment product that we should add to the storage
tank that will help protect the liner from breaking down over the years?

Thanks for your time,

Dave Palumbo
Independent Power LLC




------------------------------

Message: 2
Date: Wed, 27 Aug 2008 09:28:06 -0700
From: "Aaron Wellendorf" <[EMAIL PROTECTED]>
Subject: Re: [RE-wrenches] Hot water tank liner recommendations?
To: "RE-wrenches" <[email protected]>
Message-ID:
<[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"

I would ask that you contact Stephen Rhoades at Burke Industries: (800)
669-7010 x406, www.burkeind.com. Burke Industries is manufacturer of
Hypalon, one of the best single ply membrane roofing products. The same
(or similar) products are used for reservoir liners, pond liners,
waterproofing underground homes, etc. If you need to set something on
the membrane such as a heat exchanger coil, then have a pre-made walkpad
heat welded under the area of the coil. The walkpads are several times
thicker than the membrane itself and are made for rough service areas.
Stephen really helped me a lot on one of my large commercial projects.

Aaron Wellendorf




------------------------------

Message: 3
Date: Wed, 27 Aug 2008 06:53:30 -1000
From: "marco" <[EMAIL PROTECTED]>
Subject: [RE-wrenches] Sunny Boy 6000U
To: "'RE-wrenches'" <[email protected]>
Message-ID: <[EMAIL PROTECTED]>
Content-Type: text/plain; charset="us-ascii"

Amigos y amigas,

I'm looking for a new or simply working old-style SMA SB 6000U.  Might
anyone have one they'd be willing sell me?  If so, please contact me
off-list.

thanks,
marco

Marco Mangelsdorf, Ph.D., President
Electrical Contractor License C-26351
69 Railroad Avenue, A-7
Hilo, Hawai'i 96720
(808) 969-3281, 934-7462 facsimile









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--
Karl Schwingel
NABCEP Certified Solar Thermal Installer
NorthWind Renewable Energy LLC

PO Box 723 Stevens Point, WI 54481
[EMAIL PROTECTED]
Cell: 715 209 0446
Fax : 715 952 4501


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