the dual tank is necessary, as you need to purge the system of veggie oil on shutdown. don't skimp on this step!
Steve Spence Subscribe to the Renewable Energy Newsletter: http://www.webconx.com/subscribe.htm Renewable Energy Pages - http://www.webconx.dns2go.com/ Human powered devices, equipment, and transport - http://24.190.106.81:8383/2000/humanpower.htm [EMAIL PROTECTED] ----- Original Message ----- From: "Tim Helweg-Larsen" <[EMAIL PROTECTED]> To: <biofuel@yahoogroups.com> Sent: Thursday, December 20, 2001 7:27 AM Subject: [biofuel] SVO without a diesel start/purge > Hello, > I have been looking at your archived postings and > researching different designs of VSO conversions. I > have yet to come across any that overcome the use of > diesel or biodiesel as a startup/purging fuel. > Does anyone know of cars that have been rigged to > start on VSO even on cold days? > > I have the outlines of a possible design here, and I > am keen to hear what you think of it. > > SVO/WVO only design: > - Single fuel tank and delivery system (SVO) > - Fuel lines and possibly tank heated with engine > coolant (pipe in pipe) and insulated > - Electrical heating element (wire) inserted inside > fuel lines close to the engine, near to the fuel pump > and injectors. Also electrical heat tape wrapped > around the outside of pump and injectors. > - A small reservoir installed just before the fuel > pump. This would consist of a collapsible bellows, > also heated from the inside with heating wire. > > So with all this in place, it would be operated as > follows: > The electrical heaters would be turned on, as you > might with glow plugs. These will bring the fuel that > first needs to get to the engine up to temperature. > In the worst case example, you might find all your SVO > fuel solid in the morning. In this case the electrical > heaters would melt and heat up the fuel close to the > engine and the engine would begin to use up this and > the fuel in the reservoir bellows, collapsing it as it > did so. With the engine now running however, it could > start to melt the rest of the fuel supply and > replenish the reservoir. The electrical heaters would > be controlled thermostatically to cool down and shut > off as the fuel supply heats up sufficiently. > > The practicality of it all would depend to a great > extent on how quickly the electrical heaters generally > took to bring the SVO up to temp. Bear in mind that > the volume of fuel contained in these "end of the > line" components isn't very big and that the specific > heat capacity of Veg oil is probably quite low. I > would hope it could heat up quite quickly. > > You then have to weigh up waiting for a veg oil only > car to heat up or the slightly cumbersome procedure of > switching fuels in an SVO/diesel. I suppose in part I > am trying to find a design that is easy for Joe public > to buy and not think twice about. > > Anyway, I would appreciate any feedback on this, > > Thanks, > Tim. > > > __________________________________________________ > Do You Yahoo!? > Everything you'll ever need on one web page > from News and Sport to Email and Music Charts > http://uk.my.yahoo.com > > > Biofuel at Journey to Forever: > http://journeytoforever.org/biofuel.html > Please do NOT send "unsubscribe" messages to the list address. > To unsubscribe, send an email to: > [EMAIL PROTECTED] > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > > ------------------------ Yahoo! Groups Sponsor ---------------------~--> Access Your PC from Anywhere - Full setup in 2 minutes - Free Download http://us.click.yahoo.com/1GUySC/E6eDAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
