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01-04-2018, 07:47 PM
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#1 |
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Newbie
Join Date: Sep 2011
Posts: 41
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PROPANE Heat Exchanger + Chiller Recommendations
Hey IC...Couple Questions for anyone that uses Pure Propane as solvent and has experience with a proper heat exchange to chiller combination. I am looking to purchase a heat exchanger..And I am currently looking at the Bhogart 100lbs an hour unit...which is probably a tad overkill for my system which is probably more around 50~60lb range..but for the price it seems reasonable...however thats only half the solution. My question is...has anybody used this particular exchanger? If so what chiller did you throw at it to achieve our desired results? In my case as I assume most folks case I'm looking for a recovery time of more or less 1 hour. If anybody has an alternative solution..I'm open to suggestions. Any recommendations appreciated. Thanks!
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01-04-2018, 09:49 PM
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#2 |
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Member
Join Date: Jan 2014
Posts: 68
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What’s the price tag
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01-05-2018, 12:11 AM
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#3 |
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Newbie
Join Date: Sep 2011
Posts: 41
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Well..The Bhogart heat exchanger is around 5000 bucks...the chiller is...IDK yet? Still Looking for Solutions to Semi-Complex Questions..and IC is a good place to ask
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01-05-2018, 12:25 PM
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#4 |
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A Posse ad Esse. From Possibility to realization.
  
Join Date: Apr 2009
Location: River City, USA
Posts: 9,402
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The specific heat of n-Propane is about 0.39 BTU/Lb/F.
The boiling point/liquidification point is about -42.2C/-44F What temperature is your Propane leaving the pump?
__________________
An age is called Dark not because the light fails to shine, but because people refuse to see it. Believing is seeing and ignorance is bliss until it bites you in the ass! Fervor is the weapon of the impotent. The harder the sell, the poorer the product. Alas, my ignorance abounds; the more I've learned, the less I know that I know.......... Thou shalt seek and respect the opinions of operators, even unto the third helper, for theirs is a wisdom unknown to technicrats. Wise men learn more from fools, than fools from wise men. In my dotage I finally discovered that the secret to putting on pants both legs at a time is sitting down. |
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01-05-2018, 03:11 PM
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#5 |
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Newbie
Join Date: Sep 2011
Posts: 41
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Unsure really GW...Lets say hot? Heha! IDK how I'd test that exactly either...
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01-05-2018, 03:57 PM
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#6 |
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Newbie
Join Date: Sep 2011
Posts: 41
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Specs Photos
Specs for the 20..don't see any for the 100 but I think safe to assume internally similar construction just 5 times as a big...
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01-05-2018, 08:56 PM
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#7 |
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Newbie
Join Date: Sep 2011
Posts: 41
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Originally Posted by Gray Wolf...
GW I stole this from another post of yours..I think my math is right?? and lets assume exhausts at 120F... The latent heat of vaporization for n-Butane is 165.6 btu/lb, so that converts to about 48.5 Watts per pound. The latent heat of vaporization for PROPANE is 184 btu/lb, so that converts to about 53.9 Watts per pound. https://www.engineeringtoolbox.com/butane-d_1415.html https://www.engineeringtoolbox.com/propane-d_1423.html https://www.rapidtables.com/convert/p...TU_to_Watt.htm You have to remove both any heat added by the pump, as well as the heat of vaporization to return it to liquid state at about (31.2F for BUTANE)...((-44F) for PROPANE) You can measure the temperature of the gas exiting your pump closely enough for our purposes, measuring the plumbing fitting at the pump discharge with a hand held infrared thermometer. If you subtract (31.2F for BUTANE)...((-44F) for PROPANE) from that reading, you will have your delta T for your calculations. The specific heat of both BUTANE and PROPANE is 0.39 btu/lb/F, and can be found in the engineering toolbox links above. It says that it takes 0.39 btu’s per pound for both BUTANE and PROPANE, to raise its temperature 1 degree F. So if you pump exhaust is 120F, your delta T is 120F – 31.2F= 88 degrees delta T for BUTANE. So if you pump exhaust is 120F, your delta T is 120F – (-44)F= 164 degrees delta T for PROPANE. Soooo, 1 lb of n-butane at 88 degrees delta T, requires 88/0.39=225.6 btu to return it to 31.2F. Soooo, 1 lb of PROPANE at 88 degrees delta T, requires 164/0.39=420.5 btu to return it to -44F. BUTANE 225.6 btu + 165.6 btu heat of Vaporization = 279.8 btu/lb to remove to return it to liquid state. PROPANE 420.5 btu + 184 btu heat of Vaporization = 604.5 btu/lb to remove to return it to liquid state. Using the converter above, that is about 82W per pound for BUTANE. Using the converter above, that is about 177W per pound for PROPANE. So ~50lb*82W=4,100 Watts for BUTANE?? So ~50lb*177W= 8,850 Watts for PROPANE?? I think this is right GW slap me if I’m wrong…SMH..I deduce from all this that chilling PROPANE is TWICE as Hard and TWICE as Expensive but I sorta already knew that 
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1 members found this post helpful. |
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01-06-2018, 11:38 AM
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#8 | |
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A Posse ad Esse. From Possibility to realization.
Join Date: Apr 2009
Location: River City, USA
Posts: 9,402
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Quote:
__________________
An age is called Dark not because the light fails to shine, but because people refuse to see it. Believing is seeing and ignorance is bliss until it bites you in the ass! Fervor is the weapon of the impotent. The harder the sell, the poorer the product. Alas, my ignorance abounds; the more I've learned, the less I know that I know.......... Thou shalt seek and respect the opinions of operators, even unto the third helper, for theirs is a wisdom unknown to technicrats. Wise men learn more from fools, than fools from wise men. In my dotage I finally discovered that the secret to putting on pants both legs at a time is sitting down. |
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01-08-2018, 09:22 AM
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#9 |
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Newbie
Join Date: Jul 2014
Posts: 15
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This Is at the start of a normal day with a thermo fisher g50 after 2 hours im at 45f if i dont add dry ice blocks to my chiller reservoir smh depending on the size of your runs you need a powerful chiller im looking at spending 35000+ for a chiller to do what i want 
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2 members found this post helpful. |
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01-09-2018, 01:36 AM
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#10 |
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Member
Join Date: Mar 2014
Posts: 254
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Exergy has some baller heat exchangers. Ben at TouchScience sells the best chinese chillers.
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