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SurfinSapo
Full Grown Flour Bluffian
Joined: 03 Dec 2007
Posts: 1089
Location: Corpus Christi, Tx
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 Posted: Tue Nov 25, 2008 1:18 pm Post subject: Save money for more |
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fishing equipment. Do yall use these ever? I might try one out. I heard you can only fill to about 75%, but that is still better than throwing the bottles away everytime.
The MacCoupler uses are many and can be used to fill one pound refillable propane cylinders with any 20 to 40 pound propane tank. It's easy and cost effective. Made of solid brass, the MacCoupler will last a lifetime and is a welcome addition to anyones camping gear, tool chest, or their RV or camper.
http://maccoupler.com/
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OSOFARAWAY
Flour Bluffian in training
Joined: 02 May 2006
Posts: 454
Location: San Angelo
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| Posted: Tue Nov 25, 2008 1:28 pm Post subject: |
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| A friend of mine used to fill them that way, for best results put the small bottles in the freezer and get them real cold first. |
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ccbobber
Full Grown Flour Bluffian
Joined: 21 May 2006
Posts: 2359
Location: The Island
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| Posted: Tue Nov 25, 2008 2:16 pm Post subject: filler |
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after you use it a few times, please post results, problems, tips or overall feelings about safety and or usefullness.
happy t day to all. be sure to add a short prayer for our troops as we enjoy the day.
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robul
Full Grown Flour Bluffian
Joined: 26 Jun 2007
Posts: 2677
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| Posted: Tue Nov 25, 2008 2:39 pm Post subject: |
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| if you freeze the small bottles and turn the propane tank upside down you can probably fill them near 100% capacity.. |
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Drake
Full Grown Flour Bluffian
Joined: 27 Jun 2007
Posts: 1338
Location: Arkansas
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| Posted: Tue Nov 25, 2008 2:46 pm Post subject: Propane bottles |
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| Why would you freeze them? Does it drop the internal air pressure of the smaller bottles? |
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snakecan2
Full Grown Flour Bluffian
Joined: 20 Mar 2006
Posts: 1504
Location: Boerne
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| Posted: Tue Nov 25, 2008 2:50 pm Post subject: |
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maybe we need to contact them and market for recycle our propane tanks.. will get one.. not bad idea.. if it works it is worth $20 bucks for big tank and refill the small ones
not bad for 18.99.. with all the gadgets we have in our tackle box and tool box.. what is 20 bucks.
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Fish and Hunt Baby.... so tight lines and clear scopes. |
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topdog15
Full Grown Flour Bluffian
Joined: 14 Jun 2006
Posts: 4566
Location: Flour Bluff
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| Posted: Tue Nov 25, 2008 3:09 pm Post subject: |
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looks interesting. let us know if you try it out.
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"Ya'll must eat a lot of fish" |
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Skipjack
Flour Bluffian in training
Joined: 29 Jun 2006
Posts: 300
Location: San Antonio, TX
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| Posted: Tue Nov 25, 2008 3:56 pm Post subject: |
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This will actually work fairly well if you flip the large tank over.
| OSOFARAWAY wrote: | | A friend of mine used to fill them that way, for best results put the small bottles in the freezer and get them real cold first. |
As for freezing the small bottles???
Sorry to burst your bubble but this is useless. Realistically speaking you are reducing the vapor pressure by about 60 PSI for say 1 gallon of propane. 60 PSI of vapor propane will burn about 2 seconds longer than otherwise. The best option is to keep the pressure maintained by keeping tight fittings and flip the propane tank upside down.
Higher pressure elevates the boiling point of propane which keeps it in liquid form. In liquid form you will transfer the most propane possible. The temperature of the bottles is irrelevant. Its already in liquid form! You can't decrease the volume (more than 0.5%) of a liquid without changing its state. This is why we use liquids for hydraulics because they are nearly incompressible. However, you can reduce the vapor pressure by decreasing the temperature but we are talking about a very small amount of propane. 1/1000th of the same amount in liquid form. Why waste freezer space and electrical energy for a measly 1/1000th of a drop of propane? Its already super cheap! To cool that empty bottle it probably cost you 4 times the amount in electrical energy.
Sorry, I should just ignore it and decline from posting but people do weird things that make absolutely no scientific sense.
Some Classics.
Concrete discharges car batteries so people set car batteries on blocks of wood.
Adding "freshwater" to "saltwater" fish fillets before freezing.
Electrical tape on hooks to provide insulation for "Magnetic fields".
Tapping a soda can before opening it to reduce foaming.
I could go on for a while.
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I am a pirate 200 years too late.
Last edited by Skipjack on Tue Nov 25, 2008 4:00 pm; edited 1 time in total |
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GoinCoastal
Member White Shrimper Boot Club
Joined: 30 Mar 2006
Posts: 735
Location: Leander/Aransas Pass/ Wilderness Systems Pro Staff
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| Posted: Tue Nov 25, 2008 4:05 pm Post subject: |
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| Skipjack wrote: | This will actually work fairly well if you flip the large tank over.
| OSOFARAWAY wrote: | | A friend of mine used to fill them that way, for best results put the small bottles in the freezer and get them real cold first. |
As for freezing the small bottles???
Sorry to burst your bubble but this is useless. Realistically speaking you are reducing the vapor pressure by about 60 PSI for say 1 gallon of propane. 60 PSI of vapor propane will burn about 2 seconds longer than otherwise. The best option is to keep the pressure maintained by keeping tight fittings and flip the propane tank upside down.
Higher pressure elevates the boiling point of propane which keeps it in liquid form. In liquid form you will transfer the most propane possible. The temperature of the bottles is irrelevant. Its already in liquid form! You can't decrease the volume of a liquid without changing its state. However, you can reduce the vapor pressure by decreasing the temperature but we are talking about a very small amount of propane. 1/1000th of the same amount in liquid form. Why waste freezer space and electrical energy for a measly 1/1000th of a drop of propane? Its already super cheap! To cool that empty bottle it probably cost you 4 times the amount in electrical energy.
Sorry, I should just ignore it and decline from posting but people do weird things that make absolutely no scientific sense.
Some Classics.
Concrete discharges car batteries so people set car batteries on blocks of wood.
Adding "freshwater" to "saltwater" fish fillets before freezing.
Electrical tape on hooks to provide insulation for "Magnetic fields".
Tapping a soda can before opening it to reduce foaming.
I could go on for a while. |
And exactly what type of scientist are you???
Because cooling the bottle keeps the propane LIQUID when it hits the bottle. If the bottle is warm, some of the liquid turns to gas taking up volume that could be filled with more dense liquid. |
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Skipjack
Flour Bluffian in training
Joined: 29 Jun 2006
Posts: 300
Location: San Antonio, TX
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| Posted: Tue Nov 25, 2008 4:17 pm Post subject: |
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| GoinCoastal wrote: | | And exactly what type of scientist are you?? |
A research and development scientist in pharmaceutical development. Going on 10 years.
| GoinCoastal wrote: | | Because cooling the bottle keeps the propane LIQUID when it hits the bottle. If the bottle is warm, some of the liquid turns to gas taking up volume that could be filled with more dense liquid. |
Yes "a very small fraction" of the liquid does turn to gas. The exact amount would be equivalent to the amount of propane that you could fill the bottle in a gaseous form.
If, we are talking about a 1 gallon propane bottle which is equivalent to 3.78 liters.
Since, propane has an expansion coefficient of 0.0037 at Std Atmospsheric pressure and temperature. Or 1/270 since propane is 270 times its volume in a gas as it is a liquid at this pressure and temperature. (I will give you the benefit on this one because its actually a smaller number at higher pressures, but that's beside the point)
3.78 x 0.0037 = 0.013 Liters of liquid propane or 13mL.
0.013L divided by 3.78Liters x 100 = 0.3%
YAY! We saved 0.3% of our propane.
The fact is, the pressure of the propane is too high to change a noticable amount back to a gas. You would have to heat the bottle up to 400ºF to make a noticeable difference. By doing so you would create higher pressure anyways thus increasing the boiling point even higher.
Take a class in physical chemistry and study Vapor Pressure and boiling points. Or see the Wikipedia versions to help explain things.
http://en.wikipedia.org/wiki/Vapor_pressure
http://en.wikipedia.org/wiki/Boiling_point
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I am a pirate 200 years too late.
Last edited by Skipjack on Wed Nov 26, 2008 8:56 am; edited 3 times in total |
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frayed
Full Grown Flour Bluffian
Joined: 19 Jun 2008
Posts: 1535
Location: Austin and a lil East of the Bluff
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| Posted: Tue Nov 25, 2008 5:05 pm Post subject: |
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| Skipjack wrote: | Some Classics.
Concrete discharges car batteries so people set car batteries on blocks of wood.
Adding "freshwater" to "saltwater" fish fillets before freezing.
Electrical tape on hooks to provide insulation for "Magnetic fields".
Tapping a soda can before opening it to reduce foaming.
I could go on for a while. |
Geez, next you're gonna tell me that tin foil hats do not prevent mind control. 
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Jeff
Get Busy
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robul
Full Grown Flour Bluffian
Joined: 26 Jun 2007
Posts: 2677
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| Posted: Tue Nov 25, 2008 5:16 pm Post subject: |
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| Skipjack wrote: | This will actually work fairly well if you flip the large tank over.
| OSOFARAWAY wrote: | | A friend of mine used to fill them that way, for best results put the small bottles in the freezer and get them real cold first. |
As for freezing the small bottles???
Sorry to burst your bubble but this is useless. Realistically speaking you are reducing the vapor pressure by about 60 PSI for say 1 gallon of propane. 60 PSI of vapor propane will burn about 2 seconds longer than otherwise. The best option is to keep the pressure maintained by keeping tight fittings and flip the propane tank upside down.
Higher pressure elevates the boiling point of propane which keeps it in liquid form. In liquid form you will transfer the most propane possible. The temperature of the bottles is irrelevant. Its already in liquid form! You can't decrease the volume (more than 0.5%) of a liquid without changing its state. This is why we use liquids for hydraulics because they are nearly incompressible. However, you can reduce the vapor pressure by decreasing the temperature but we are talking about a very small amount of propane. 1/1000th of the same amount in liquid form. Why waste freezer space and electrical energy for a measly 1/1000th of a drop of propane? Its already super cheap! To cool that empty bottle it probably cost you 4 times the amount in electrical energy.
Sorry, I should just ignore it and decline from posting but people do weird things that make absolutely no scientific sense.
Some Classics.
Concrete discharges car batteries so people set car batteries on blocks of wood.
Adding "freshwater" to "saltwater" fish fillets before freezing.
Electrical tape on hooks to provide insulation for "Magnetic fields".
Tapping a soda can before opening it to reduce foaming.
I could go on for a while. |
Your the expert.. Iv never personally filled propane bottles but used to fill my own nitrous bottles and that helped tremendously.. But nitrous pressures are effected tremendously by temp.. I'm sure you know that though.. I always flipped them as well because there was no syphon in the mother bottles.. |
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ironmanstan
Exalted Ruler of Flour Bluff
Joined: 04 Oct 2006
Posts: 12256
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| Posted: Tue Nov 25, 2008 5:18 pm Post subject: |
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I have heard the foil hats work..lol thats a classic. Great humor, something the world needs more of.
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cbroutfitters
Flour Bluffian in training
Joined: 01 Nov 2007
Posts: 479
Location: Corpus Christi
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| Posted: Tue Nov 25, 2008 5:31 pm Post subject: |
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Back to the adapter, They work well enough to make them worth it. They reduce your cost and amount of waste produced by treating the small bottles as disposable. We used them alot when I was in the scouts as a kid and teenager. I would say get it and give it a fair shot. Just dont missplace the thing......lol.
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V/R,
Capt. Cody
The Producers Guide Services
www.theproducerstexas.com |
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mikelcctx
Flour Bluffian in training
Joined: 26 May 2008
Posts: 258
Location: Padre Island, TX
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| Posted: Tue Nov 25, 2008 6:37 pm Post subject: question |
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I hate to ask a dumb question, but when do you know that your small bottle is full? (or as full as your'e going to get it) 
Skipjack, can we call you Bill Nye? j/k 
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