[biofuel] Re: Colour of latest batch

2004-08-07 Thread Matt Pozzi

I realise that mostly no where else cooks in animal fats, but here is 
Australia they use beef tallow. This has a very high beta carotene 
levels due to the feed the animals eat, grass, this makes lovely 
burgundy coloured biodiesel which like shorteneing has a higher cetane 
rating due to the large amount of embodied energy in the animals fat. 
Saturated fats are good for fuel not for people.

Just do not try it outside of a temperate climate, it gels at quite a 
high temperature. 

The moral of this story is that not all biodiesel is straw coloured!

Matt

--- In biofuel@yahoogroups.com, gregg2560 [EMAIL PROTECTED] wrote:
 Hi All,
 
 I'm at a bit of a loss regarding the colour of my latest batch of 
 biodiesel. It is a medium amber rather than pale straw yellow. This 
 particular batch went through about 8 washes. The water in the first 
 one or two was quite milky as expected,  washes 3 - 6 got 
 increasingly clear, the last 2 looked like clean water. I checked 
 the pH  it was 6.8 to 7.2. I also did the shake test, the BD  
 water separated within 30 - 45 minutes. The only thing I can think 
 of is that this batch was made from vegetable shortening rather than 
 oil. I'm wondering if maybe I should run it back through the process 
 (Aleks Kac Method).
 
 As always, any help, advice, or suggestions are appreciated.
 
 Sincerely,
 Gregg Davidson




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[biofuel] Re: looking for a biodiesel 4x4 station wagon

2004-05-22 Thread Matt Pozzi

Well if your Biodeisel is top notch, try a Peugeot 406 HDi Wagon for 
size, common rail and it should work. I am going to buy a 307 HDi and 
try it for size, not quite as big but modern styling, I would prefer 
the 406 but you just cannot buy one second hand in Australia, no 
reseels their, they like them too much!

Matt
--- In biofuel@yahoogroups.com, Adam Monsen [EMAIL PROTECTED] wrote:
 If you can, I haven't been able to find one! That /would/ be my 
ideal
 vehicle, though.
 
 --- In biofuel@yahoogroups.com, Steven Pfaff [EMAIL PROTECTED] 
wrote:
  Can't you get the 4motion on a TDI Volkswagen Jetta wagon?
  
  Adam Monsen [EMAIL PROTECTED] wrote:Anyone know a manufacturer that
 produces diesel 4x4 station wagons? I
  can't find one anywhere.
  
  Or how about a 4x4 diesel coupe?



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[biofuel] Re: Biodiesel burns hotter or cooler?

2003-12-14 Thread Matt Pozzi

Keith et al,

I cannot explian why it is so but a compression engine is not the same 
as an ignition engine, meaning that in a diesel leaner means cooler, 
richer means hotter.

So this may go to explaining a few things.

Also wear as a product of conbustion temperature is one thing, 
biodiesel earns its stripes by lubricating better, and mainting its 
viscosity better as temperature rises prior to injection as well. By 
doing this it keeps all the fuel injection system better lubricated 
and hence the probable lower wear characteristics.

I hope this is not repeating anyone else.

Regards,
Matt

--- In biofuel@yahoogroups.com, Keith Addison [EMAIL PROTECTED] wrote:
 I got this enquiry below, but it baffles my brain cell. Would the 
 all-wise among us be able to shed the clear light of reason, if not 
 unbaffle my brain cell? Thankyou!
 
 There is also this:
 http://infoarchive.net/sgroup/BIOFUEL/28554/
 Explanation for higher NOx emissions?
 
 Best
 
 Keith
 
 One thing, which is a bit strange (or not, read on) that I noticed, 
 is that all data states that biodiesel burns hotter than dino. I 
 drove on dino for 10 days, a habit of mine before each winter 
comes. 
 The exhaust is nice and cool.
 Allegedly, bio is burning much leaner, it needs less oxygen, but is 
 given the same mass of air as dino. Leaner flames burn hotter, i.e. 
 damage on the exhaust pipes on lean burning engines. Hence high 
NOx. 
 The hotter burning also keeps the burning chamber clean, and this 
is 
 observed several times, once even by me. Also folks using bio for 
 heating say it burns hotter, keeping the fireboxes a nice 
grey-white 
 color instead of brown-black (Home Power magazine, you can look it 
 up on the internet).
 So, which is it? I've always had the feeling that we (the biodiesel 
 grassroots community) state that bio burns cooler, hence less wear 
 on engines?


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[biofuel] Re: immersion heaters

2003-11-16 Thread Matt Pozzi

--- In biofuel@yahoogroups.com, Alan Petrillo [EMAIL PROTECTED] wrote:
 Rodney Hadley wrote:
  
   I have started to make a processor out of a hot water heater, and 
my
   thoughts are that I will have to remove the existing heating 
elements
   due to them being submerged in oil.
 
 No, that won't be necessary.  They'll probably be fine.  Just take 
your 
 220v elements and feed them 110v and you won't have any problems 
with 
 the elements overheating.

Absolutley spot on, but make a rough extimate of the elements area of 
contact with the oil (length*pi*radius squared) and make sure the 
output will be around or less than 3W/sq cm, this will ensure no 
burning of the oil whilst heating. Elsewise you will need to stir 
while heating. 
 
   I'm pretty sure that the
   combination of the heating element and the oil will end in a 
fire. Is
   this correct?
 
 Well, yes and no.  The combination of heating element, oil, and 
_air_ 
 will end in fire.  If you take the air out of the equasion, I.E. by 
 keeping your element submerged, then you won't have a problem.
 
   I have heard of many people using immersion heaters,
   what type will be best for heating oil?
 
 The one that will fit into your processor.  The physically larger 
the 
 better.  About the best thing you can do is use the largest 220v 
element 
 that will fit into the hole, and feed it 110v.

Did you mean to say existing heating elements? Are there two, then 
you should have no trouble. Use ohms law, Power = Current squared 
times resistance. The resistance will be the same on either voltage so 
it a simple calculation.

Contact a specialist hot water / element manufacturer, and get a nice 
long element to fit. I did and they are wonderful (2 of) and they are 
feed in series on 240VAC to drop the power to the desired level. 
Always used fully submerged of course.


regards,
Matt


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[biofuel] Re: oil transfer pump, 55 gal processor

2003-08-18 Thread Matt Pozzi

Alan Petrillo wrote:
 Do you do this by varying your input voltage/current, or by
 attaching a big heat sink?

I do not need to alter voltage or current, the elements I use are 
1800W but are over 2 metres in length and approx 1 cm wide. this makes 
for an energy density of 1800 / (200 * 1 * 3.14) which is less than 
3w/sq cm. Todd is also on the mark, my tank is insulated and has a 
bolt on lid with a seal. A waste of energy otherwise, th only downside 
is the bottom is not yet insulated and causes interesting 
stratification of thermal layers, pumping fixes / mixes this.

 One of the thoughts I've had was to make something like an electric 
 frying pan.  What you have with and electric frying pan is basically 
a 
 110v 1500W heating element which has been fused into a BIG heat 
sink. 
 I'm not real sure what you'd do about electrical connections, but 
it'd 
 be interesting to try.

Again heat density is an issue, as well as the electrical connections 
as you pointed out.

 Ah.  Most of the water heater elements I see over here are elongated 
U 
 shapes.  I suppose for that you'd take the diameter of the element 
and 
 the total length of the element rather than the length of the bent 
 shape.  It would be twice the length of the bent shape plus half a 
 circle the radius of the width of the U.  Do I have that right?

Yes you are right, my elements are doubled over yet again so a 50 cm 
element has 4 lengths and three curves!
 
 It depends.  Most of the ones I see around here, particularly if 
they're 
 110v are 1500W.  The 220v ones are usually around 2000W, with a few 
as 
 high as 3000W.

In this case wire two elements in series and cut their output by a 
quarter. This is a very good option and is the simplest and cheapest 
way to go. So and 1800W element now puts out 450W, two give 900W which 
is much more useable and safer (oil wise) as it heats slower. The 220V 
2000W elements on 110 V output approx 1000W, put two of these in 
series and get 500W

 Isn't that what this exercise is all about?  Have fun, and be good 
for the environment while doing it.

Absolutely!
MP


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[biofuel] Re: oil transfer pump, 55 gal processor

2003-08-17 Thread Matt Pozzi

My 2 cents, put the electrical element horizonatlly, makes for better 
convective heating than when its vertical.

Matt
--- In biofuel@yahoogroups.com, Kaj [EMAIL PROTECTED] wrote:
 
 Hi,
 
 Just building my first big processor, using a 55 gal drum, I've done 
some small 5 gallon buvket batches with great success thanks to all 
your input and the journey to forever site and Tickells book.  I am 
having a cone bottom welded on and a 1 coupling to accept a std. hot 
water heater element.(where should i place the element? i'm thinking 
low on the cone)  I wanted to ask a few questions and get some of your 
thoughts based on your experiences.
 
 A,) If I use the circulation method to mix the reaction(using a 
pump), where should i put the intake? down on the cone?, and should I 
just use a hose for the exhaust. I wonder where to put it because I 
may have very different size batches. Do i need to avoid splashing? my 
other option is to use an old trolling motor I have for mixing. Anyone 
tried this?
 
 B.) Home depot has a $79 utiltiy pump I think its a 1/3 hp. Talks 
about water in the description, never about oil or fuels. Does anyone 
just use a regular water pump like this? Or is it dangerous? wear out 
faster? How about with straight petrol fuel oil. Someone locally is 
giving away their 250 gal fuel tank, if I remove the 100 gal. of fuel 
in there. Is this a dangerous proposition with just a regular pump? 
How are fuel rated pumps any different?
 
 Thanks very very much. I am collecting 10gal/week from a chinese 
restaurant and need to get cooking soon. Word has spread and I am 
already being offered more oil..delivered to my house no less!!!
 
  
 
 
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[biofuel] Re: oil transfer pump, 55 gal processor

2003-08-17 Thread Matt Pozzi

 Matt Pozzi wrote:
 My 2 cents, put the electrical element horizonatlly, makes for 
better 
 convective heating than when its vertical.

 AP wote 
 Put it on the barrel just above the joint of the barrel to the cone. 
 And when heating your oil with a water heater element it's best to 
heat 
 while stirring.  Otherwise you risk overheating the element and 
burning 
 it out.

Indeed Alan you are right, I should have added that keeping the energy 
density of the element low prevents localises heating resulting in 
burning of the oil and destruction of the element too. I keep mine to 
below 3W/sq cm and rely on convection heating, if you are using higher 
energy densities, STIR it otherwise it may well burn out prematurely.

The energy desity is element output divided by length x Diameter x 3.
14.

All dimensions I use are metric centimeters. YMMV Water elements are 
typically about 1200 W and are short in length resulting in high 
energy densities. 

Have fun,
Matt


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[biofuel] Re: biodiesel layers

2003-08-07 Thread Matt Pozzi

Brent most likely soaps, hope that helps. Answered since no one else 
has yet.

Matt
--- In biofuel@yahoogroups.com, Brent [EMAIL PROTECTED] wrote:
 Did another batch and got that thin layer between the glycerine and 
 the diesel. Remind me again what it is. Thanx
 Brent


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