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Author Topic: help with my waste oil heater  (Read 8696 times)

cowkllr

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help with my waste oil heater
« on: December 16, 2014, 05:10:58 pm »

I am building my own waste oil burning heater.  I have done a lot of research and I am using ideas from all different designs.  I have an 80 gal air compressor tank.  I have built an Ozzirt style burner and placed it inside the tank.  I know the ozzirt burner isn't made to be inside the tank but I was going to ad a blower fan.  The burner isn't burning as clean as have seen others burn clean.  I left the vents in the rotor open and drilled 6 holes in the rotor.  Should I weld the vents closed and keep just the drilled holes?  Should I drill more holes in the secondary burn tube?  Or should I scrap my idea and mount the burner on the bottom of the tank so it is outside the tank like the original ozzirt hetaer?  Any help is appreciated.



doug

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Re: help with my waste oil heater
« Reply #1 on: December 16, 2014, 08:51:25 pm »
I've always thought the ozzirt heater was a good design. I'd go with the burner on the outside of the tank.
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http://wasteoilheaterforum.com/index.php?topic=102.0

cowkllr

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Re: help with my waste oil heater
« Reply #2 on: December 16, 2014, 09:22:27 pm »
Does the exhaust have to be larger than the secondary burner tube?  My exhaust is a hair smaller. 

doug

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Re: help with my waste oil heater
« Reply #3 on: December 17, 2014, 06:48:04 pm »
Is this what you were trying to build with the compressor tank?   http://love2diy.com/category/waste-oil-ozzirt-burner/


https://www.youtube.com/watch?v=QQGtl87-x58
« Last Edit: December 18, 2014, 08:47:26 pm by doug »
You can't put it on the internet if it isn't true!

http://wasteoilheaterforum.com/index.php?topic=102.0

cowkllr

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Re: help with my waste oil heater
« Reply #4 on: December 17, 2014, 07:42:10 pm »
Yeah kinda.  I've watched all his videos.  Mine don't have the steel plate at the top of the burner that seperates the burner from the heat chamber.  That might be what I need.  I was looking into the roger sanders version with the blower motor too.  I would post pics but all my pics are too large of a file. I need to make them smaller.

doug

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Re: help with my waste oil heater
« Reply #5 on: December 18, 2014, 03:10:32 pm »
I believe that Russ can help with sizing your pic.
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http://wasteoilheaterforum.com/index.php?topic=102.0

cowkllr

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Re: help with my waste oil heater
« Reply #6 on: December 18, 2014, 09:40:47 pm »
I think I got it resize enough.  Does the height of the secondary matter? This one is 12" tall
« Last Edit: December 18, 2014, 09:42:42 pm by cowkllr »

cowkllr

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Re: help with my waste oil heater
« Reply #7 on: December 18, 2014, 09:53:51 pm »
 http://youtu.be/RXwI1aAh2WU

Here's a video.  I have to keep the rotor slid off the pot a little for it to get this hot when its inside the tank.

doug

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Re: help with my waste oil heater
« Reply #8 on: December 20, 2014, 07:23:20 pm »
Your primary burner, why does it have so many holes and why are they so big? I've never built an Ozzirt heater so I have no experience with one. I'm not sure if the length on the secondary burner makes any difference. From looking other Ozzirts heaters they have less and smaller holes in the primary and the secondary burners seem to have more.
You can't put it on the internet if it isn't true!

http://wasteoilheaterforum.com/index.php?topic=102.0

cowkllr

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Re: help with my waste oil heater
« Reply #9 on: December 20, 2014, 07:36:47 pm »
They are 1/2" holes.  I could try blocking some off and see what that does.  I did notice when I slid the rotor off the pan to get more air the smoke good t darker. 

doug

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Re: help with my waste oil heater
« Reply #10 on: December 20, 2014, 07:56:30 pm »
https://www.youtube.com/watch?v=HaUBYNiLs20

 This guy has four vids of how he improved his Ozzirt heater.

Here's a plan of an Ozzirt. I was wrong this has six primary holes and they are 6mm.


 http://i303.photobucket.com/albums/nn133/ozzirt/Heater.gif

« Last Edit: December 20, 2014, 08:08:55 pm by doug »
You can't put it on the internet if it isn't true!

http://wasteoilheaterforum.com/index.php?topic=102.0

cowkllr

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Re: help with my waste oil heater
« Reply #11 on: December 20, 2014, 10:12:43 pm »
Good info.  I'll do somemore testing. Thanks

Ronmar

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Re: help with my waste oil heater
« Reply #12 on: December 21, 2014, 07:22:20 pm »
Yep, it is a tricky balance between airflow and fuel/gas produced.  Not only is the volume of air important, where it is applied, and how it mixes with the fuel is also important.  And of course more is not better as this can cool down the burner and effect how the gas is produced.  One thing I figured out pretty quickly is you better have the finished flue in place to experiment with.  Any changes to the flue mean that all that trial and error you did getting it to burn right probably just went out the window.  That is one of the best parts the gentelman in the above linked videos points out.  I think it is also good to plan on covering/enclosing the burner section in a box with a single air inlet that can be ducted to the outside. Depending on how well the building into which this is being installed is sealed, whether doors and windows are open and how far can really effect the draft in the flue.  If you duct in the combustion air, the state of windows and doors will have no effect on the burn.  It will also help keep the draft from one of these monsters from pulling cold air in thru evey leak in the envelope of the space you are trying to heat.  IT is also safer, if you work on vehicles and accidently spill fuel, the vapors on the floor are going to be drawn to this heater and could possibly be ignited by the burn pan, blowing off the aformentioned doors and windows in a gross and viscious fashion:)   

I have been playing with this type burner lately and it has been tricky to get it to burn consistently without adding forced air.  The main advantage of the forced air is the turbulence it can be made to create.  That is where the holes seem to work the best over other air inlet methods, They create more turbulence.  Some swirl in the burn also helps, but too much dosn't:)  What I found is the more noise it makes, the better it is usually running, but making changes is real hit and miss as it can be a lot of drilling just to find out it dosn't work any better, or works even worse... 

One thing I found is that a curved bottom burn pan is usefull.  Since the gas produced is a factor of the temperature and the size of the oil puddle in the pan.  In a curved bottom pan, the size of the puddle can be varied by flow rate to help taylor the gas produced to the available airflow for a clean burn.

Fuel flow can also be a problem.  Most of these I have seen have a jug feeding the burner from a shelf or bench.  Gravity while readilly available is not very consistent when powering a fluid that changes viscosity and flows better as it gets warm...  I ran into this when building my babbington.  As it warmed up, it would run away and required constant throttle adjustments.  I didn't want to use a fuel pump so I settled on a lightly pressurized fuel tank on the ground.  It seems to give me much more consistent oil flow as the garage warms up.

cowkllr

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Re: help with my waste oil heater
« Reply #13 on: December 23, 2014, 04:52:00 pm »

cowkllr

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Re: help with my waste oil heater
« Reply #14 on: December 23, 2014, 04:52:19 pm »
Waste oil burner test: http://youtu.be/wdRF-j83A2k