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TechEditor

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In a discussion about the 11B Blue Flame heaters here, I stated that when Kerosene is pushed into a Blue Flame, it smells more than a Yellow Flame. Since I began to get complaints from the Boss about that little Kerosene Heater (11B) smelling while we were working on our 3 season Porch this winter, I took the 11B back into the Lab and started doing some testing on converting it into a Yellow Flame heater without the Blue Flame smell.
Well here it is: [1_zpssy5fzlmq] 
It produces within 50 Deg F. of a Blue Flame, the wick has now operated for 20 hrs without ANY attention, can be carried without flairing, and most importantly DOES NOT SMELL! This modification is for any "High Power" Blue Flame Stove Burner, eg. KP10, 810, 11B, or any stove that needs to be converted into a Heater. Yet the Burner can be readily converted back into a Blue Flame for cooking.
Here is how I did it: Here is the 11B with it's standard Blue Flame Flame Spreader and a Model 500 Yellow Flame Flame Spreader. [2_zpskek1vub0]

Here are the differences in the two Flame Spreaders: [3_zpsjujhjrgt]  [4_zpswshzqvxv]  So, my thought was to take the Model 500 Flame Spreader and add a larger disc to cover the top of the wick, like a standard Perfection heater with the 500 wick, and have the wick burn from the side instead of the top, like the Blue Flame's do.
So, a little machine shop work and I had my disc. [5_zps7dknjh2y]  And installed it looks like this from the bottom. [6_zpsxa9svym4] 

Installed it looks like this: [7_zpsjjo0vw19]
With the wick raised until the Flame Spreader stopped (just like a 500 burner): [8_zps3iqztc9r]  This version was tested both with and without the chimney collar installed.
However I never could get the burn to travel all the way around the wick??? So I tried it with the Model 500 Flame Spreader and no ring disc covering the wick, burning it just like a Center Draft lamp.
[9_zpsomo2cdxd]

Success!
[10_zpsrczcmdyw]  A stable burn, that lit quickly and propagated around the wick quickly.  
I next tested it on my K12 2-burner stove, removing the Blue Flame Flame Spreader and inserting the model 500 Flame Spreader.
At approximately the same chimney temperature, the respective flames look like this:

[11_zps0uxh99ab]
[12_zpsbmev7117]  With the right side Blue Flame burner turned all the way up to yellow tips, I measured about a 50 deg. F. increase in chimney temperature over the Yellow Flame Burner on the left side.
[13_zps2brzhi4j]

CONCLUSIONS: I find that the switching of the "High Power" Flame Spreader for the Model 500 Flame Spreader is a very viable option for heating with no Blue Flame smell. Portable heaters can now be carried while in operation with no flairing, and the constant attention needed to maintain the Blue Flame is no longer needed.
I start the burner just like normal. Then after a minute or two to get the draft going, I can raise the wick to obtain the highest stable Yellow Flame without smoking, just like a "Center Draft" lamp. I would guess the output would be in the neighborhood of 6000 BTU's.
The Boss is happier while we are working on the Porch this winter, so I guess this modification is a success.

 


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Greg

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boheem

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Reply with quote  #2 
Thats very interesting, I have'nt owned one of these, YET, but when I do this is great to know, thanks for the research.
vrod

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Reply with quote  #3 
Greg, how long will this thing burn without having to refuel and clean the bottom lip of the flame spreader?  When you said the wick ran over 20 hours without any attention, was that on a single tank of fuel?  Amazing!  Good work!
TechEditor

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Reply with quote  #4 

Wick does not touch Flame Spreader. Tried that style, didn't work. Remember, what I ended up with is basically a Center Draft lamp. You never clean the Flame Spreader of a Center Draft Lamp because the wick doesn't touch it. All the Flame Spreader does is dump air onto the inside of the wick, forcing the burn outward.

I ran at least 8 hrs on the tank that I think is less than 1 gal. Have not cleaned or done anything to the wick at all. Trying to see just how far I can go. Will report when I have extra data.


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vrod

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Reply with quote  #5 
Ok gotcha.  I was not very familiar with how center draft lamps operate.  Always thought the flame spreader would require the same type of maintenance as a Perfection.  Very interesting.  Keep up the good work!
DougA

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Reply with quote  #6 
Great work checking out a great idea!  My 1312 trailer stove has the same kind of burners in it as your 11B and I am more interested in using it for heat than cooking.  I will now keep an eye out for some 500-type flame spreaders.
TechEditor

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Reply with quote  #7 
I was actually thinking of you when I did this experiment, because your stove was actually billed as both a heater and cook stove. I think you will like the Yellow flame conversion. I am using my 11B more as Yellow than I ever did as a Blue.
Am really disappointed the Blue Flame doesn't work as well as it should. The Blue Flame is more efficient but there is obviously some kind of chemical change taking place at the higher temperatures of the Blue Flame that does not occur in a Yellow Flame. And this change results in a "smell".

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DougA

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Reply with quote  #8 
I hadn't thought about it since I haven't used it that much but there is a bit of a smell from the 1312 which there of course isn't with the yellow flame heaters.  It must be something with the blue flame burners because aren't there complaints/comments from the Aladdin blue flame heater owners about a smell?
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Reply with quote  #9 
DougA: There are!

Vrod: Here are your performance figures; Run time is 17 hrs per gallon, or 8 1/2 hrs per the 1/2 gallon Fount on the 11B. Estimated output is 5800 BTU. I now have close to 40 hrs with no wick cleaning, although it could use a trimming, just like a Center Draft Lamp (which it now essentially is.)

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Greg

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larryh

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Reply with quote  #10 
This is as mentioned one of the issues I found problematic using Aladdin Blue Flame heaters. They do tend to create an objectionable odor after running for some time in the home.  I have not however found that the perfection cooking stove burners produce a similar effect?   If anything the round wick center draft lamps can tend to have a very strong odor compared to regular flat wick lamps.. Lately I have been picking up  some of the #3 new brass burners which are offered on ebay and other places. They aren't cheap but I have had very good luck with them and they do produce a better light than the #2 burners without much odor.   Some burners simply seem to produce an odor and a similar brand may not.. I have a #3 I just removed from a lamp due to excessive odor..  It may have been due to the fact that that lamp was allowed to sit unused for sometime and the oil started to get that "yellowish" tone that older oil developed. Even cleaning the lamp fount didn't solve the problem. My guess is that the wick once impregnated with poor oil will produce a strong oil smell compared to a new wick.  I am going to try the boiling it in soapy vinegar water that some suggest for restoring old wicks.. 

Larry
vrod

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Reply with quote  #11 
Thanks for the info Larry and Greg.  Larry, let us know if the boiling soapy vinegar works. 
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