greener..
Malcolm
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On
Behalf Of Joe Street
Sent: 19 January 2006 14:02
To: Biofuel@sustainablelists.org
Subject: Re: [Biofuel] Dewatering
with vacuum.
Hey Malcolm;
Does it just give VP of water or is it other substances as well??
PS
: [Biofuel] Dewatering with vacuum.
Jeromie Reeves wrote:
inline
David Miller wrote:
[snip]
I'm not sure what you're referring to in "I should look for a 50". I'd
suggest looking for a "dry" pump that doesn't require oil lubrication.
Message
-
From:
Joe Street
To: Biofuel@sustainablelists.org
Sent: Thursday, January 19, 2006 9:02
PM
Subject: Re: [Biofuel] Dewatering with
vacuum.
***No
virus was detected in the attachment no filenameNo virus
You're talking about 2
different things.
Talking about so-and-so-much vacuum is sort of misleading. Your
30Hg of vacuum means 0Hg (0 mmHg, 0 mbar, 0 psi) absolute pressure; the vapor
pressure points were absolute pressure. Absolute pressure is measured
according to how high of a column of mercury
r a 50? I am sure this will become quite
clear, but now, it's not sinking in.
Thanks John
-
Original Message -
From:
Joe Street
To:
Biofuel@sustainablelists.org
Sent:
Wednesday, January 11, 2006 2:00 PM
Subject:
Re: [Biofuel] Dewater
- Original Message -
*From:* Joe Street mailto:[EMAIL PROTECTED]
*To:* Biofuel@sustainablelists.org
mailto:Biofuel@sustainablelists.org
*Sent:* Wednesday, January 11, 2006 2:00 PM
*Subject:* Re: [Biofuel] Dewatering with vacuum.
David Miller wrote
- Original Message -
From: David Miller [EMAIL PROTECTED]
To: Biofuel@sustainablelists.org
Sent: Wednesday, January 18, 2006 8:49 AM
Subject: Re: [Biofuel] Dewatering with vacuum.
Those sound about right. An atmosphere is ~30 mercury and ~30 feet of
water.
Just in case anyone
] Dewatering with vacuum.
David Miller wrote:
Snip
Somebody had the vapor pressure tables for water earlier in this
thread,
maybe he could look up the pressure for 55 and 5 degrees C.
--- David
5 deg. C = 6.5mm Hg
55 deg. C = appr. 110 mm Hg
they are already at a lower pressure. If you're up on a
mountainit will be even easier.
Logan Vilas
- Original Message -
From:
Arttu
Aula
To: Biofuel@sustainablelists.org
Sent: Wednesday, January 18, 2006 7:08
AM
Subject: Re: [Biofuel] Dewatering with
vacuum
-
From:
Arttu
Aula
To:
Biofuel@sustainablelists.org
Sent:
Wednesday, January 18, 2006 7:08 AM
Subject:
Re: [Biofuel] Dewatering with vacuum.
You're talking about 2 different things.
Talking about so-and-so-much vacuum is sort of misleading. Your 30&qu
Vilas
- Original Message -
From:
Joe Street
To: Biofuel@sustainablelists.org
Sent: Wednesday, January 18, 2006 11:21
AM
Subject: Re: [Biofuel] Dewatering with
vacuum.
Atmospheric pressure varies by a fraction of an inch (except
for at the eye of a hurricane
Jeromie Reeves wrote:
inline
David Miller wrote:
[snip]
I'm not sure what you're referring to in I should look for a 50. I'd
suggest looking for a dry pump that doesn't require oil lubrication.
These are commonly used for refridgeration or freeze drying of food,
should go to the
logan vilas wrote:
To remove water at 55C your pump has
to remove 11(at sea level)times the atsmopheric volume of your
container before you get to a low enough vacuum to boil off water. If
your atsmophericpressure is 0.13 PSI lowerat your level.Then
yourmultiplier is only 10
Great Post David;
You obviously know a thing or 10 about vacuum. I would just comment on
this suggestion though
David Miller wrote:
I'm not sure what you're referring to in I should look for a 50. I'd
suggest looking for a dry pump that doesn't require oil lubrication.
These are commonly
]
[mailto:[EMAIL PROTECTED] On Behalf Of David Miller
Sent: 18 January 2006 17:41
To: Biofuel@sustainablelists.org
Subject: Re: [Biofuel] Dewatering with vacuum.
Jeromie Reeves wrote:
inline
David Miller wrote:
[snip]
I'm not sure what you're referring to in I should look for a 50. I'd
suggest
-mail it to you. It should print out ok
on a standard laser or a good inkjet.
Regards
Malcolm
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of David Miller
Sent: 18 January 2006 17:41
To: Biofuel@sustainablelists.org
Subject: Re: [Biofuel] Dewatering
uel@sustainablelists.org
Sent: Wednesday, January 11, 2006 2:00
PM
Subject: Re: [Biofuel] Dewatering with
vacuum.
David Miller wrote:SnipSomebody had
the vapor pressure tables for water earlier in this thread, maybe he
could look up the pressure for 55 and 5 degrees C.---
David 5 d
William Adams wrote:
Your water-to-steam volume change calculation is not correct. The
correct volume increase is 1,244x, obtained as follows: One mole
(molecular wt. in gm) of liquid water = 18 gm = 18 cc. One mole of
steam = 18 gm h2o vapor = 22,400 cc. At standard temperature and
David Miller wrote:
Snip
Somebody had the vapor pressure tables for water earlier in this thread,
maybe he could look up the pressure for 55 and 5 degrees C.
--- David
5 deg. C = 6.5mm Hg
55 deg. C = appr. 110 mm Hg
It means that water does not have to be removed from the trap (as was
@sustainablelists.org
Sent: Wednesday, January 11, 2006 6:25 AM
Subject: Re: [Biofuel] Dewatering with vacuum.
William Adams wrote:
Your water-to-steam volume change calculation is not correct. The
correct volume increase is 1,244x, obtained as follows: One mole
(molecular wt. in gm) of liquid water = 18
quot;David Miller" [EMAIL PROTECTED]
To: Biofuel@sustainablelists.org
Sent: Friday, January 06, 2006 1:13 PM
Subject: Re: [Biofuel] Dewatering with vacuum.
logan vilas wrote:
Water boils off at 43F at 20-50mmhg of vacuum at sea level. At 140F it
takes about 150-200mmhg. Wh
u need
to get a better method. There is likely less then 1 cubic inch after
setteling and draining. That would only take 6 miniutes to remove.
Logan Vilas
- Original Message -
From: "David Miller" [EMAIL PROTECTED]
To: Biofuel@sustainablelists.org
Sent: Friday, January 06, 2006 1
. There is likely less then 1 cubic inch after
setteling and draining. That would only take 6 miniutes to remove.
Logan Vilas
- Original Message -
From: David Miller [EMAIL PROTECTED]
To: Biofuel@sustainablelists.org
Sent: Friday, January 06, 2006 1:13 PM
Subject: Re: [Biofuel] Dewatering with vacuum
Hey Jacko
According to the hyperphysics page (great page) and here it is:
http://hyperphysics.phy-astr.gsu.edu/hbase/kinetic/watvap.html#c2
You see the vapour pressure of water at room temperature is roughly 17
mm of mercury. This is less than 1 inch so you would need better than
29" Hg
u can afford havelow flow
rates.
Logan Vilas
- Original Message -
From:
[EMAIL PROTECTED]
To: Biofuel@sustainablelists.org
Sent: Thursday, January 05, 2006 3:35
PM
Subject: [Biofuel] Dewatering with
vacuum.
Can vacuum be used alone to dewater oil at room
logan vilas wrote:
Water boils off at 43F at 20-50mmhg of vacuum at sea level. At 140F it
takes about 150-200mmhg. When fluids are mixed togther the Pressure of
Vaporization changes especially when thouroughly mixed. You do not
need a condensor if you are useing a AC type vacuum
Can vacuum be used alone to dewater oil at room temp?Or even at
slightly elevated temp? 55 deg. C would be a good temp so
when it finished drying it could be sent directly to the processor. I would
alsoneed a condenser to keep the evacuated water out of the vacuum
pump.A friend of mine (in
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