you need a button:D
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you need a button:D
You may need a blower. It might not be getting enough air.
Its a thought, but it did get hot enough to do its job, just not sure whether thats when it was burning on or under the alli dish:DQuote:
Originally Posted by slug_burner
Thanks, did your shorter larger secondary burner tube make much of an improvement?Quote:
Originally Posted by ozzirt
Yes radiator was a heat exchanger when I was running the sanders version, on the other side of the flimsy wall is my office in the corner of the shed. I'm thinking of one for this heater but haved yet got around to it.
Tank is great and cost me zilch I used to have a 20L drum sitting on the trusses in the shed and had to hand pump oil up to it was a real pain and it got hot and thinned out the oil making control an issue, much better outside with 30mm pvc feeding into the shed
The secondary tube was the same diameter, in fact it was the same cylinder liner , just with the burnt and crumbly bit cut off the bottom. I think that the biggest part of the improvement was that I replaced several hundred small holes (about 4mm) with a much lesser number of 10mm ones. This got it up and running in about half the time and got rid of the smoke when starting and stopping.
I also found that it was best to have the oil supply line out of the direct radiant heat. In my heater it is only just a bit above blood temperature at the regulating valve and doesn't vary a great lot regardless of whether I've just got it idling over ur full blast, fortunately I've never had any appreciable problems with thinning. It's amazing how much the oil heats up in the 1/4" feed pipe from the valve and then into the dripper which is fixed to the supporting framework below the firebox, I put a laser thermometer on the actual dripper tube and it was about 180 degF. as it dripped down onto the feed trough. I couldnt get a temperature reading down through the sight hole, but you can see oil boiling along the edges as it flows into the pan.
That looks plenty hot enough, if you get it any hotter it might be in danger of collapsing under it's own weight.:DQuote:
Originally Posted by rovercare
I see that Oigle* has worked out where the warmest spot is.
*All unknown dogs are called Oigle, and they all respond to it.
Maybe the fact that it was shorter made it look larger, often hard to tell in photo's. My secondary burner tube (TOYOTA) is approx 100mm ID 810mm Long and has 4 rows of 8mm holes 16 in each row and what you can't see in the photo's I uploaded is that at the top of the tube there is 1 more row of holes same size and number I think this made a slight difference? they where added laterQuote:
Originally Posted by ozzirt
I never tried smaller holes and I'm not sure why I chose 8 mm but it worked and is easy to light, I clean the primary pot add 150ml diesel ( I collect the diesel from filters I change :)) and drape a small piece of rag soaked in the diesel over the dripper tube so both end are in the pool and light that and away she goes
As you probably saw in the photo's the last 2 feet of my oil feed line are in the radiant heat area this doesn't seem to bother the whole setup much i'll agree the dripper tube does get bloody hot probably a good thing to help preheat but the drum above the heater was a pain in the !#$
Great to see people having a go I like rovercare's setup. My sander's version was rolled 6mm plate 400mm dia and stood 1350mm high, I managed to get a red glowing band around it at dish hight probably 300mm wide, it was a scary sight:twisted:, I melted 5 aluminium dishes ( 3 that I had cast) then made one from steel plate 8mm it was slower to light but it never melted. I was never happy with the soot it created and did not want to force feed it air nor fuel ( this defeeted the purpose of a free energy source) it was not nor was I able to create complete combustion of the air fuel mixture so it's now a garden ornament
What I have now is the closest (as far as combustion goes) to the commercially available KROLL heater and still have a huge budget left over.
Here's to cold beer and warm shed's / houses
Anyone selling one of these? Am keen to buy.
had enough of this....
made 3 ally dishes to use as the burner....
get it all going just right then the bloody things melt into the bottom of the bottle.
since it keeps burning , just not as cleanly Im just going to use the curved shape on the bottom of the gas bottle as the burner plate and drill some extra holes further up to get secondary air in and whack a 44 over it to provide a buffer of hot air.
I also found out that cheaper valves have a plastic or rubber nib in them that collapses and melts and lets about 10l of oil into the thing in about 20 minutes... under those conditions you get a lot of very ugly brown smoke and an 80l LPG tank that is glowing bright red from the top down.
photos to follow.
Get the pics up!Quote:
Originally Posted by Blknight.aus
Mine melted, I think when I buy a press I'll just press a mild steel plate concave and use that, just oxy it cherry red, should get it going, unfortunately time constraints wont see me playing heater games any time soon:(