School Bus Conversion Resources

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-   Veggie Oil | WVO | Biodiesel | SVO (http://www.skoolie.net/forums/f17/)
-   -   sKOOLie on Waste Vegetable Oil (http://www.skoolie.net/forums/f17/skoolie-on-waste-vegetable-oil-639.html)

skoolie_grease 04-17-2005 06:16 PM

sKOOLie on Waste Vegetable Oil
 
Couple of things up front -

1) I'm gonna try to keep this as cheap as possible
2) Don't want any high science or expensive tools involved
3) Use what is available. Alter as little as needed. Have fun.

I did a couple of searches on this site and here are the topics w/ info:

http://www.skoolie.net/forum/viewtopic.php?t=223
http://www.skoolie.net/forum/viewtopic.php?t=330
http://www.skoolie.net/forum/viewtopic.php?t=406
http://www.skoolie.net/forum/viewtopic.php?t=614

I'm starting from scratch, so hopefully this will map out an easy, cheap way for others to do the same, if they're so inclined.

For starters, I know (or at least understand) that you need a Diesel engine to make this work. I've got that taken care of w/ a 1992 7.3L International Short Bus.

From what I gather there are other major components that make up the system: tank, filter, oil fuel lines, heater, and mabe a few other odds and ends I'm forgetting (maybe a lot).

But since you gotta start with the first step, I'm looking to mount a tank somewhere on the bus. Preferrably, it would go underneath so it's not adding any extra 'obstacles'. There's a few good spaces underneath the bus.

The place I'm going to put the tank needs to be w/in range of the heating system, which leads me to the first real question at hand:

You know that rear heater that is a little box on the floor of the bus that has a fan and a few hoses that go back to it? Well, can I somehow use that to heat the oil in the tank before I send it up to the engine? I figure since it's already back there and has heat, it would seem like the most logical, easy method to heat my oil.

I thought I read something by lapeer20m that mentioned taking it apart and just using the coil to heat the oil. Is this the same heater we're talking about?

Thanks for any contributions to something that seems like a worthy project.

pixie 04-23-2005 09:54 PM

Hi,
We are running our bus on veggie oil,though at present we need to fix the tank ( a semi truck tire took it out). We have been doing our own system,as oposed to one of the kits.

It's not perfect,and we are still working out the "bugs" and fine tuning everything.

Anyway,maybe you can get some ideas from what we did so far, we have pictures and explanations for everything......

http://www.enchantedgypsy.blogspot.com/


Just scroll down a few posts to see what we did.Like I said it is a work in progress,so any ideas are welcome.

lapeer20m 04-24-2005 07:49 PM

I use the coolant lines for my rear heater to heat my veggie tank. I also made my own kit.....and i think even the new kits require some fine tuning.

I still have my rear bus heater, i just added the tank heater inline. My bus comes equiped with an auxilliary 12 volt coolant pump, so pushing coolant through an extra 10 feet of cooland line wasnt an issue.

remember that extra coolant accessories must be installed in series and not in paralell.

TravelingMan 04-25-2005 10:34 AM

Has anyone thought to use the fuel tanks off a semi they usually have fuel heaters built in. I think one with a couple dents would go for a reasonable price.

lapeer20m 04-25-2005 03:08 PM

I have never seen the actual heater for a diesel tank, but here are my thoughts......

I know it is an option to have fuel tank heaters on semi's. I assume they are electric. The question is: will they heat the contents of the tank to 130 or more degrees? The answer is probably not unless you do some modifications. ie: tinker with the thermostat. It would be an interesting expieremnt to find a truck with a tank heater and see how hot the fuel will get.

IT seems unlikely that the heaters in stock configuration would raise the temperature of the fuel above it's flash point. For diesel, that's ~ 120 degrees. Flash point is the lowest temperature at which a liquid gives off enough vapor to ignite under normal atmospheric pressures.

I still believe that using engine coolant is the best method for heating wvo. I've yet to see any good alternatives

TravelingMan 04-25-2005 05:42 PM

They are heated with coolent and can get very hot if you forget them. The tanks come with a fuel return and coolent shutoff valve on the back side of the tank and I occasional turned off the wrong one. :oops: either I had one empty tank or hot fuel. :wink:

lapeer20m 04-25-2005 08:01 PM

I stand corrected....

since they are heated with coolant, then i'm sure they'd make excellent wvo tanks.

skoolie_grease 04-30-2005 07:21 PM

tricore coolant-heated system
 
Quote:

Originally Posted by lapeer20m
I use the coolant lines for my rear heater to heat my veggie tank. ...
I still have my rear bus heater, i just added the tank heater inline. My bus comes equiped with an auxilliary 12 volt coolant pump, so pushing coolant through an extra 10 feet of cooland line wasnt an issue.

Yeah, I'll have to agree with you. No reason to destroy a good heater. :)

pixie's link to the "tricore heater" system that seems to be the simplest and easiest and cheapest way to heat the oil on it's way to the tank. If you haven't yet, scroll down about a third of the way to where it says "The lowdown on the veg":

http://www.enchantedgypsy.blogspot.com/

The hot coolant flows back to the tank and circles back around, I think, while the grease flows to the engine *around the copper coolant tubes*. They've got it rigged so the coolant also does a few wraps around his 55 gallon plastic drum. Pretty good labeled pics, too.

Quote:

Originally Posted by lapeer20m
remember that extra coolant accessories must be installed in series and not in paralell.

Ooh, yeah. Thanks for that tip. Don't need any more adventure than a sKOOLie already provides. :D

skoolie_grease 04-30-2005 07:24 PM

Quote:

Originally Posted by pixie
Hi,
We are running our bus on veggie oil,though at present we need to fix the tank ( a semi truck tire took it out). We have been doing our own system,as oposed to one of the kits.

It's not perfect,and we are still working out the "bugs" and fine tuning everything.

Anyway,maybe you can get some ideas from what we did so far, we have pictures and explanations for everything......

http://www.enchantedgypsy.blogspot.com/


Just scroll down a few posts to see what we did.Like I said it is a work in progress,so any ideas are welcome.

Big thanks for this documentation pixie! It's a beautiful design. Were you able to repair the tank from when you rolled over the semi tire? Those things come outa nowhere and swervin's the last thing you want to do.

lapeer20m 05-01-2005 01:05 PM

http://www.skoolie.net/albums/Jacuzz...ing_system.jpg


I am so impressed ! That is quite possibly the most ingenious veggie oil heating system i've seen yet.

BRILLIANT !!!


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