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Messages - altfuelfurnace

Pages: 1 [2] 3 4
16
Compressed Air Sources / Re: Quiet air compressor
« on: January 07, 2012, 11:54:47 pm »
My Kingbuilt came with a small hospital grade air compressor that is
relatively quiet, not as quiet as some of the "noiseless" models out
there. Anyway, Kingbuilt will sell the air compressors for about $400.
Its an on-demand and I run my system at 15 PSI and is rated to go even
higher.

steve kronimus

17
Compressed Air Sources / Re: Quiet air compressor
« on: January 07, 2012, 11:54:35 pm »
When I have my burner running, it runs with a harbor freight airbrush
compressor. Am running at 5-6 psi and it works n demand because it does not have
a tank. It's the 1/5 hp, very quiet.

"scarface193"

18
Compressed Air Sources / Quiet air compressor
« on: January 07, 2012, 11:54:23 pm »
hi i was wondering what you guys are using for air compressor? im running a
little 5 gallon and it is noisy. im wondering what would be a good quiet pump
that will keep up? are the thompson pumps any good? do you need a tank for them?
thanks

"revdwg"


19
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:23:37 pm »
Pulse Width Modulation.

It's sort of like turning on and off the switch very fast. You can
control the on/off periods to have it move slower.

diyernh

20
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:23:21 pm »
PWM stands for Pulse Width Modulation; it is a method used in motor driving to
control speed by varying on/off pulse frequency and duration.

"Chris Brunner"

21
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:23:05 pm »
I'm following this to see how it goes. I originally tried a level tank outside in NH (cold). After much trial- no fuel or way too much, I swapped to a metering pump.
I wanted to add Craigs heater block, but he didn't recommend it below 50 degrees. You will have to overcome the issues of starting up when cold.

Maybe a kerosene startup and flush?
Maybe electric heaters for the air?

Heating the small amount of fuel won't make much difference if you are blowing 10 degree air into it

As for the level of the fuel in the nozzle, it shouldn't matter. The metering pump should add a controlled amount of fuel. The blower will add a controlled amount of air. At the right ratio, it will burn.



Carl

22
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:22:46 pm »
John
You will not regret getting one of Craigs kits, work very well and good
instructions for instalation.
I'm not sure what PWM stands for, but reversing the pump should work to prevent
nozzle drip, it would take some expermenting to get the timing down. You want
to get the oil just below the center line of nozzle so that when it expands from
heat it will not drip out the nozzle. For my simple mind it was just easer to
install a solonoid valve.
Kevin

23
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:22:30 pm »
Having spent sometime experimenting with babbingtons I have decided to buy one of Craigs kits to start making savings this winter, I am setting up a second boiler outside the house in a small new boiler shed.  I will probably be running wmo since all the wvo around here is committed to the biodiesel makers. Since I don't have a siphon tank and I do have oil pumps and small low speed electric motors it seems as though it might be best to move directly to a metering pump setup.  I would need to build a pwm speed controller but I think that's possible.  My other experience of PWM controllers is in controlling the wire feed rate in a mig welder, in some of these when the trigger is released and the wire stops the controller reverses for a moment of two to pull the wire back and make for an easier arc start next time.  The same approach would seem to be a possibility with the metering pump, reversing it at switch off and removing the pressure from the nozzle and killing the drip.  What do people think? does anyone have a circuit for a PWM with this feature?  it would seem an ideal application for an Aarduino driven controller.

John

24
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:22:14 pm »
Matt
That is correct, I do not have a constant level tank. I tried that first with a
float switch and after a couple to times that the switch failed and had oil all
over the floor I switched to the metering pump,and haven't looked back sence
Kevin

25
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:21:59 pm »
Hello, Kevin,

I am new to this, setting up a system now, but, from what I
understand, you have a pump feeding a siphon nozzle? Is that
correct? Is that in place of the constant level tank?

Thanks,

Matt

26
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:21:44 pm »
I agree, in one year I have saved over $2200 and I will have a ROI in
less than 3 years with my Kingbuilt/Buderous boiler.

steve kronimus

27
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:21:30 pm »
I have a Buderous (KingBuilt) 150, its is really awesome, very, very
easy to clean!

steve kronimus

28
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:21:17 pm »
Aaron
I forgot to answer your other question.
As far as setting the speed of the metering pump, my speed controler on the DC
motor has a range from 0 to 10. My system needs about .75 GPH, bench testing I
found that 5 is about right. If I want a higher output I can uurn it up, but
also have to increase the air pressure a little. I look through the sight glass
to watch for a clean burn where the flame does not hit the back of my combustion
chamber.
Kevin

29
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:21:05 pm »
The Metering pump is wired to my temp controler, so it turns on when the heater
block is up to temp.
I do have a three way solenoid valve in the loop between the pump and the nozzle
so it opens to the nozzle when the pump turns on, and opens to a small bucket
under my furnace to drain back most of the oil in the nozzle when it shuts down.
The bucket holds about a gallon and just dump this back into my tank about once
a week.

"Kevin Matheson"

30
Waste Motor Oil / Re: Is it possible? Combustion chamber size?
« on: January 07, 2012, 11:20:51 pm »
Do you need a solenoid valve stop and start the oil before the nozzle? How exact
on the metering do you have to be? I see a drip issue, and , or a problem with
to much oil at the nozzle. Are these issues?

Thanks,
One of the better threads in awhile. Good stuff.

"Aaron Smith"

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