thunder wrote in newsan.2007.07.22.04.07.26
@TAKEOUTgti.net:

I don't understand. Does cloudy == freezing?



As temperature drops, unwinterized diesel fuel, as well as frying oil,
solidifies at some temperature. If it gets really cold, it looks like
Crisco. Crisco has a much higher melting point than Canola oil, which is
what most of the frying oil is.

So, systems like Frybrid, HEAT the oil, using the hot water from the
heater hose off the engine to heat the pickup area of the tank, the oil
lines to the engine, the fuel filter, and a big heat exchanger that
raises the oil to 160F which makes it have the same viscosity as diesel
fuel for proper injection before feeding it through some switching valves
to the injection pump. Viscosity of it varies greatly with temperature.
Hotter is thinner, obviously. At the smoking point on a stove, it's like
water.

We can run on Crisco if you get it hot enough. Diesel engines were
originally designed for vegetable oil, but when it was discovered they'd
run on dino fuel oil and kerosene which was dirt cheap at the time, they
started running them all on dino fuel oil. It'll run on anything that
will burn if you can figure out how to inject it at TDC just right, even
liquified wood.

The "Cloud point" of unwinterized diesel fuel, which is quite simply
diesel and gasoline mixed, is around 30F. Vegetable oil clouds around
45F, so if you're going to run it in winter, raw, you need to heat it.
That's what the Frybrid and other oil heater systems do...so we can
inject it.

If diesel manufacturers would change their injection system back to
vegetable oils, all these "conversions" would be unnecessary. Mercedes
diesels specify you may burn heavier #3 diesel oil if you mix it with
kerosene, right in their manual. Us frying oil injectors have just taken
that a few steps further...(c;

Larry
--
Riding down the interstate at 70 for nearly free feels just wonderful!