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Latest crackpot scheme (of mine)... | 17 comments (17 topical, editorial)
Re: Latest crackpot scheme (of mine)... (3.00 / 0) (#3)
by oztules (oztules__at__bigpond.com) on Wed Nov 14th, 2007 at 02:21:58 PM MST
(User Info) http://www.anotherpower.com/gallery/Oztules-toys

Well, there's 50000ltrs of water in 2 plastic water tanks just outside here filled from the roof run-off. It wouldn't be too difficult to insulate them with 300mm of insulation batts wrapped around the outside and then plastic wrap them.

Although with plastic tanks 6-8mm thick, max temp would be 85-90deg C.

Each tank is about $3000 each. so if you don't already have the tanks it may be an expensive operation. But if it doesn't make expectations, at least you will have your own water supply.

Water is cheap (free off the roof) and is very high on the list of liquids with good specific heat figures.

...........oztules
Flinders Island Australia
[ Parent ]



Re: Latest crackpot scheme (of mine)... (3.00 / 0) (#4)
by DamonHD (d@hd.org) on Wed Nov 14th, 2007 at 02:31:45 PM MST
(User Info) http://www.earth.org.uk/

One possibility is to simply bury the (top of the) tanks more than about 6m deep (since the temperature gradient moves about 1m/month) and let the surrounding soil add to the thermal mass of the store providing that there is nothing to carry excess heat away such as moving groundwater...

Anyway, yes, sounds like you have your seasonal store right to hand!  You might be more interested in the summer-cooling possibilities than me too.

Rgds

Damon

[ Parent ]



Re: Latest crackpot scheme (of mine)... (3.00 / 0) (#7)
by Chagrin on Wed Nov 14th, 2007 at 08:32:30 PM MST
(User Info)

Google "slab on grade" for how ~2" thick poly foam can be used to insulate a slab foundation. As absurd as it seems, you could insulate a few feet below the surface to reduce your required digging depth.

At any rate, it certainly is an interesting crackpot scheme.

[ Parent ]



Re: Latest crackpot scheme (of mine)... (3.00 / 0) (#8)
by DamonHD (d@hd.org) on Thu Nov 15th, 2007 at 01:37:03 AM MST
(User Info) http://www.earth.org.uk/

Thanks, am looking now...

Rgds

Damon

[ Parent ]



Latest crackpot scheme (of mine)... | 17 comments (17 topical, 0 editorial)

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