Thread: 3000l hot water storage tank

Can I ask what you need 3000L of nearly boiling water for?
Just curious.

coffee addiction ?

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

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

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?

A Gal tank may be a better choice.

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

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.

Originally Posted by mcmurphy

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

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

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

Originally Posted by mcmurphy

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

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......