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  1. #1
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    Apr 2007
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    Melbourne
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    10

    Default 3000l hot water storage tank

    I am looking for a large hot water storage tank 3000-3500l

    The most cost effective option in my opinion would be a poly type tank insulated on the outside. The insulating is not a problem however I understand on some types of poly tanks can handle high temps etc.

    Can anyone suggest a supplier in VIC os close who make poly tanks capable of holding hot water up to 95 degrees.

    Thanks

  2. #2
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    Jul 2006
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    Port Huon
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    Can I ask what you need 3000L of nearly boiling water for?
    Just curious.

  3. #3
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    Aug 2003
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    Melbourne - Outer East Foothills
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    1,557

    Default

    coffee addiction ?

  4. #4
    Join Date
    Apr 2007
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    Melbourne
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    10

    Default

    The tank is to b eused in conjunction with a solid fuel boiler as per the following link. The most efficient operating mode fore the boiler produces more hot water than can be used at that time (hydronic heating).

    www.woodboilers.com/heat-storage-tank.asp

  5. #5
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    It seems like a lot of wasted energy to heat 3000l of water just so that you can pump 100l of hot water through some heating radiators?

    Al

  6. #6
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    Apr 2007
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    Melbourne
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    Default

    Not quite so straight forward...

    Wood heaters operate at their maximum efficiency when the highest temperatures are achieved. Maximum combustion with minimal waste (smoke etc).

    So to heat only 100l of water per hour to maintain the house temperature the wood boiler would need to be running quite low (unless a smaller boiler was used which would require frequent refilling which is totally impractical).

    The better solution is to run the heater at it's peak efficiency and store the 24hrs or so of water in an insulated storage tank.

    Anyone know a manufacturer of water tanks able to hold heated water?

  7. #7
    Join Date
    Feb 2003
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    Garvoc VIC AUSTRALIA
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    3,208

    Default

    A Gal tank may be a better choice.
    Regards, Bob Thomas

    www.wombatsawmill.com

  8. #8
    Join Date
    Oct 2003
    Location
    Eastern Burbs, VIC
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    59

    Default

    Anyone say wood heater ??

    Always wanted to build one of these when I get some time:
    http://www.gas-turbines.com/nt6/index.html

    re tank: make sure the tank is properly insulated heat loses on a such a big surface will be huge. Do you really need 95deg ?


    good luck

    Nic

  9. #9
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    Apr 2007
    Location
    Melbourne
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    Default

    Love the wood turbine plans... sounds like a great project... tempted to buy the CD now

    Whatever tank I can source I'll insulate it very very well.

    I'm not sure about the 95 degree either as the hydronic infloor heating only needs 25 degrees or so however the boiler when running will produce very hot water. Not sure how to gauge this and still researching.

  10. #10
    Join Date
    Aug 2005
    Location
    Blackrock Vic Aus
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    79
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    0

    Default

    Quote Originally Posted by mcmurphy View Post
    I am looking for a large hot water storage tank 3000-3500l

    The most cost effective option in my opinion would be a poly type tank insulated on the outside. The insulating is not a problem however I understand on some types of poly tanks can handle high temps etc.

    Can anyone suggest a supplier in VIC os close who make poly tanks capable of holding hot water up to 95 degrees.

    Thanks
    Hi McMurphy,

    IMHO poly is not a good selection for this type of application. From what I have seen of poly tanks and hot water after time they lose something in the make up of the material and crack severely at 80 degs c If you put them to 95 degs c then this would probablt accelerate the destructive processes. 3000 litres would require a lot of support to eliminate sagging as well at these temps.

    On some of the equipment we build we use a 1200 ltr copper tank insulated with 50mm of rockwool and a galvabond outer cover. This will maintain temperature for around 10 hrs dropping a maximum of 3 or 4 degrees over this period.

    Galvanised tanks will produce a slimey scum and if not properly sealed at the joints will corode away very quickly.


    Peter

  11. #11
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    Apr 2007
    Location
    Melbourne
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    Default

    May need to look at a DIY solution instead...

    http://builditsolar.com/Projects/Spa...ng.htm#Storage

  12. #12
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    Aug 2003
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    Quote Originally Posted by mcmurphy View Post
    May need to look at a DIY solution instead...

    http://builditsolar.com/Projects/Spa...ng.htm#Storage
    Now that is one neat site, Ill look at it further when I get the time.

    Al

  13. #13
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    Sep 2006
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    Behind that little door under the thicknesser...
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    44

    Default

    I'd be looking to use a pre-cast concrete water tank for this job, preferably buried in the ground.

    Have a yarn to Edwards or Humes......
    Ours is not to reason why.....only to point and giggle.

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