Fred, Actually, I have been contemplating on this for quite a long time. I have been studying Dale Scroggin's processor which has a vacuum pump in it. (http://home.swbell.net/scrof/Biod_Proc.html). His schematics (http://home.swbell.net/scrof/procdraw.htm) indicate that the vacuum pump is connected at the end of the vapor line--process tank, condenser, alcohol trap then vacuum pump. But, my concern is since the pump is connected at the end of the line, the alcohol trap is also subjected to vacuum and so considerable alcohol will be re-vaporized and lost to the atmosphere. To minimize alcohol lost, I am thinking that the vacuum pump must be situated before the condenser--process tank, vacuum pump, condenser then liquid trap. In this setup only the process tank is subjected to vacuum. The condenser and the liquid trap would have a higher pressure, which is conducive to condensation, by constricting the liquid trap air outlet. A totally close condenser system is, I think, close to impossible since the vapor other than alcohol pumped from the processor must go somewhere. By the time gas reaches the outlet, the alcohol should have been condensed due to lowered temperature leaving us with just gas (other than alcohol). The velocity of the gas will be diminished as it enters the liquid trap due to its bigger cavity (Bernoulli's principle), thus there is less possibility that the alcohol recovered will be re-vaporized and escape into the air.
How does this sound? Regards, Chris =>-----Original Message----- =>From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] =>Sent: Tuesday, May 04, 2004 8:10 AM =>To: biofuel@yahoogroups.com =>Subject: Re: [biofuel] RE: Vacuum Pump for Condenser => => =>Hi =>I've been wrestling with this one for a while and I don't see an easy =>answer. =>I think: => a vacuum pump is not what you need, your condenser needs to empty =>into a well, and since this needs to be a closed system so the alcohol =>doesn't go evaporating off into the atmosphere. You need to maintain a =>level in the well with a positive displacement pump that is driven by a =>control circuit which maintains a prescribed Temperature/vacuum =>pressure at the top of the reactor/condenser, => =>Fred => =>On Sunday, May 2, 2004, at 17:26 US/Eastern, Tan wrote: => =>> Can anyone give me an opinion about this? =>> =>> Would a vacuum pump from a car (the vacuum pump attached to the =>> alternator =>> and the breaks' master cylinder) do for alcohol recovery? =>> =>> Thanks, =>> Chris =>> =>> =>> =>> ------------------------ Yahoo! Groups Sponsor =>> ---------------------~--> =>> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark =>> Printer at MyInks.com. Free s/h on orders $50 or more to the US & =>> Canada. =>> http://www.c1tracking.com/l.asp?cid=5511 =>> http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/FGYolB/TM =>> --------------------------------------------------------------------- =>> ~-> =>> =>> Biofuel at Journey to Forever: =>> http://journeytoforever.org/biofuel.html =>> =>> Biofuels list archives: =>> http://infoarchive.net/sgroup/biofuel/ =>> =>> Please do NOT send Unsubscribe messages to the list address. =>> To unsubscribe, send an email to: =>> [EMAIL PROTECTED] =>> Yahoo! Groups Links =>> =>> =>> =>> =>> =>> =>> =>"And some run up hill and down dale, knapping the chucky stones =>to pieces wi' hammers, like so many road makers run daft. =>They say it is to see how the world was made." =>Sir Walter Scott, St. Ronan's Well 1824 => => => => => => =>Biofuel at Journey to Forever: =>http://journeytoforever.org/biofuel.html => =>Biofuels list archives: =>http://infoarchive.net/sgroup/biofuel/ => =>Please do NOT send Unsubscribe messages to the list address. =>To unsubscribe, send an email to: =>[EMAIL PROTECTED] =>Yahoo! Groups Links => => => => => ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Ink Cartridges or Refill Kits for your HP, Epson, Canon or Lexmark Printer at MyInks.com. Free s/h on orders $50 or more to the US & Canada. http://www.c1tracking.com/l.asp?cid=5511 http://us.click.yahoo.com/mOAaAA/3exGAA/qnsNAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Biofuels list archives: http://infoarchive.net/sgroup/biofuel/ Please do NOT send Unsubscribe messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/biofuel/ <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
