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Old 07-20-17, 09:29 AM   #1
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Default Repurposing a 180 evacuated tube solar hot water system

About a month ago, I replied to an ad for a large evacuated tube solar hot water system. It was at a brewery that went bankrupt and the new brewery wouldn't be using them and it was needing to be removed. It was originally used for heating the water for the beer they were making. The system originally cost over $70,000 to purchase and install just about 5 years ago they said.

We have spent almost 2 weeks removing everything. Today is the probably the last day and time to remove the tanks.

The system consists of 6 Thermomax HP200 30 tube collectors, Hamilton EVO boiler, 2 insulated 370 gallon insulated storage tanks, pumps, Badger meter units, remote control units and sensors and lots of pipe.

I am not sure what to do with the system. Should we use the system to heat water and store in the hot water tank(s) for floor heating, DHW, forced air heating. I can easily use 3 sections on my property (90 tubes).

Maybe put the heat in the ground during the summer months and pull it back out with a geothermal heat pump during the colder heat demand months? I have two new two ton geo units, pipe and drilling equipment waiting for installation.

Or should I just sell it and buy photovoltaic?






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Old 07-20-17, 10:35 PM   #2
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Wow cool setup
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Old 07-21-17, 08:11 AM   #3
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Geo NR Gee

Have a look at the Drakes Landing system in Canada. If you can drill holes and have the right soils== have a look

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Old 07-23-17, 10:12 AM   #4
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Thanks Randen, I have been studying the Drake's Landing Solar Community and here is a good .pdf on the project for those who don't know what Randen is referring to.
http://www.hpbmagazine.org/attachmen...rta-Canada.pdf

I must admit, that I am not a good planner and usually just wing it. In my possession are almost all of the supplies and tools to install a system like what is at Drake's Landing although in a much smaller scale. However, I am hesitant to do that here and have stepped back to ask the good folks here for some input.

Like AC Hacker and others have said before, start with the insulation and tighten up the home. We have already upgraded the insulation in the attic last year and have shown improvements on the energy used to heat and cool the house. The windows should be upgraded, but that is not in the budget at the moment. They are vinyl and only 19 years old, and there are better more efficient ones of coarse. The house was built to "Good Cents" energy efficiency standards in 1998, but it surely could have been built better. The exterior walls are mostly 2x4 construction and the insulation under the floors joists was minimal. That will be upgraded this fall after the underfloor heating gets installed and insulated.

We can install the solar evacuated tubes, dig the boreholes, install the tanks and heat pumps, but without a proper sizing of the system or plan, I am worried it may be a huge disaster.

My initial thoughts are to do a manual J analysis on the home. Another door blower test. Drill some boreholes to test for soil conditions. Possibly upgrade the windows and walls with better insulation.

Help.......... please!

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