|
3 posts
|
 Heating house using hot water cylinder and ventilation system Posted 13 May 12 4:49 PM
Has anyone used the hot water cylinder to supply hot water to a radiator that is connected to a ventilation system. I have excess hot water due to the cylinder being connected to a wet back and being underutilised.
Would envisage the radiator being about 2 metres abbove the cylinder and relying on a thermosyphen rather than pumping..
|
|
132 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 14 May 12 7:06 PM
Go for it - it will work.
However - you can't use a steel radiator - it will have to be aluminium if you don't have a coil fitted to the cylinder.
JK
|
|
1 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 14 May 12 7:36 PM
|
|
293 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 15 May 12 7:36 AM
JK
Why does it have to be aluminium and not steel?
Seeker
|
|
3 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 15 May 12 11:21 AM
Understand the reasoning behind steel as it would add heavy metals to the water stystem and would be prone to rusting.
What about copper, as it is low pressure and it is near the head hight of the system anyway it would be very low preasure, I thought I could possibly use the likes of a intercooler radiator or suchlike from a car and box it up.
The other thought I had was a simple coil inside an insulated box but not sure how much heat transfer I would get from it..
My thinking was that maybe slow and steady heat supply rathere than all at once??
Thanks for your thoughts
Gary
|
|
132 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 15 May 12 5:59 PM
Yep, rust is the problem. As far as I am aware I don't think you are allowed steel products where potable water is involved.
If you want a thermosyphon system to work you will need reasonable surface areas. Small car stuff is all designed with large air flows in mind, no good for a house.
Sectional aluminium radiators would be OK, expensive and prone to leaking!
JK
|
|
293 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 17 May 12 8:31 AM
JK
So cast iron is also out (I thought cast iron doesn't rust, but probably wouldn't be allowed to be used with potable water). What about copper as per Gary's post? You could probably use the insides of a flat plate solar collector (with the frame and glass removed) as a radiator?
Seeker
|
|
3 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 17 May 12 4:07 PM
The Radiator will be fitted to the intake of the air system and that is about 200mm dia so I cant have a large area.
There will therefore be a reasonable air flow, just will be a question as to weather the small radiator will be enough to create a thermo??
Steel well we still have galvanised pipes comming into the house so think the poison side of things is well taken care of already!! but rust buildup would be a problem..
Question, how would one calculate the possible flow of the thermo syphen??
|
|
132 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 17 May 12 7:16 PM
Obviously copper heat exchangers would be fine.
Sorry, didn't realize about the size restriction. You could in theory use some old car radiators - but not sure how you'd join them to water pipes and comply with all legal stuff.
|
|
491 posts
|
Re: Heating house using hot water cylinder and ventilation system
Posted 17 May 12 7:34 PM
Even the consideration of car radiators and tap water in one system is madness.
|