Bio boiler update

[julianf]

I have not been following your projects that closely, but some things that have come to mind -

Have you considered one of the danfoss venturi nozzels, as used in the CK kit, if youre using WMO?  Its about £50 for the setup (nozzel & nozzel holder)

Also,

Danfoss make a full duty ignition transformer, so as its firing all the time that the burner is running.  I reckon with one of those, you could burn most things, but i dont know the running cost of them, nor how long WMO would take to clog the (in this case, standard) nozzel.


Also...

Did you do that search for gravey that i mentioned on the navitron forum?  Im worried that your open thermal store will end up turning into soup!

[julesandtash]

Some of those transformers put out 12Kv at around 40mA (mental note to self - that could be very nasty to get a shock from).
That multiplies out at 480 watts.
1KW/hr (ie 1 unit) of mains power is around 14p or so which means one of those transformers costs around 7p per hour to run.

[greasemonkey]

I think the thermal store might need some reconsideration anyway. It's over 1000 litres. It needs to be reduced by at least half. See how this oil burner heats it.
The idea was to heat it on WMO in the first place, but being as the central heating boiler is working so well, it might be better just to run that on palm based bio. It's only for winter, the odd bit of heat I need in summer is nothing.
It's all good fun.

[julianf]

I was going to build a 900ltr thermal store for our place, but then our heat source is solid fuel, so the capacity is more useful.

I stopped the idea, not as i thought it wouldnt be good, but simply as i picked up a 300ltr store off ebay for a ton, and it seemed simpler (and more efficient on space) to install that.

Ill build a large one at the next hose, when we have more space and / or motivation.  (ie im keeping all the copper coils i had set asside for it - it took me about 18 months to buy them all, so im not loosing them that quick!)


If you have an on/off heat source, then i cant see much point in having a huge store.  However, if you did go the glog route, then the larger the better, i think.

[photoman290]

julianf do you need some 15mmPEX? i have about 20/30 metres lying about that i got to do  underfloor heating in the coach till i discovered the WMO burner. cost me about 30 quid or so.

[julianf]

hi bob,

yes - i need some to connect up the tank to the house (the tank is in an ourbuilding).
is there anything i have that i could trade you for it?

i almost got in touch with you last week - we were in penzance

(i did not call as we were only there for a couple of days, and were on a schedule)

[photoman290]

hi bob,

yes - i need some to connect up the tank to the house (the tank is in an ourbuilding).
is there anything i have that i could trade you for it?

i almost got in touch with you last week - we were in penzance

(i did not call as we were only there for a couple of days, and were on a schedule)

cant think of anything at the moment. will have a grope around under the coach for it. its been a while so probably buried under something. cant remember if it was 20/30 feet or metres. it was the left over from a standard 100? /foot/ metre roll aparantly. will have a look when it isnt raining or blowing a gale. can put it in the post when i find it. can sort something out later.