Hi I've tried a heat exchanger to pre heat cold oil before it hits the hot plate - it's either too effiecnt or to restrictive - the oil seems to congeal in the tubes. Next plan is a larger hot plate with heat exchanger above to collect heat from steam to pre heat oil, somthing like and auto transmission cooler is about right. Condensed water could return via my existing heat exchanger.
i'm not convinced that the heat input would be the same as heating a whole barrel. Only the wet oil needs heating to boiling point, this is at most the bottom third. By heating a whole drum you need all the oil above boiling point so the water doesn't condense before it reaches the surface. By using the hot plate, although not fast, you only need to heat the wet oil. Some heat will precipiat upwards in the drum and you should end up with a tank of oil about 60 degs not 120(estimate) --- In [EMAIL PROTECTED], "Bill Althouse" <[EMAIL PROTECTED]> wrote: > In a thermally cascaded batch process, (the dry hot oil is used to heat the > incoming wet oil), energy usage can be cut by over 90% with a counter flow > heat exchanger and insulated tanks and lines. Counter flow exchangers are > very efficient and easy to make. > > Bill > www.enviroactive.com > > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] > Sent: Wednesday, September 19, 2001 3:23 PM > To: [EMAIL PROTECTED] > Subject: [biofuels-biz] Re: Dave's calculations.... > > > Hi jan/dave > > YOur calculations seem to match my guesses. I'm using a 1100 watt > element which seems to produce a lot of steam. I reckon it will boil > of all the water (from a 160 litre batch) in about 4 hours and leave > it at a sensible temp for processing. > > Perhaps one of you that's good at the maths will confirm that this > uses less energy than haeting the whole drum to 120+ degs to remove > the water. > > ANy idea how much heat i could recover from the steam? > > Simon > > --- In [EMAIL PROTECTED], "Jan Sur—wka" <[EMAIL PROTECTED]> wrote: > > Hi Dave, > > > > Your calculations are OK. > > > > All the others, please give the attention of the ratio of apparent > heat to latent heat > > > > latent heat is always a huge amount. > > > > jan > > thermo-dynamics specialist > > [EMAIL PROTECTED] > > > > Biofuels at Journey to Forever > http://journeytoforever.org/biofuel.html > Biofuel at WebConX > http://www.webconx.com/2000/biofuel/biofuel.htm > 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/ ------------------------ Yahoo! Groups Sponsor ---------------------~--> FREE COLLEGE MONEY CLICK HERE to search 600,000 scholarships! http://us.click.yahoo.com/ujOgTC/4m7CAA/ySSFAA/9bTolB/TM ---------------------------------------------------------------------~-> Biofuels at Journey to Forever http://journeytoforever.org/biofuel.html Biofuel at WebConX http://www.webconx.com/2000/biofuel/biofuel.htm 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/
