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Kassen
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Joined: Jul 06, 2004 Posts: 7678 Location: The Hague, NL
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Posted: Wed Oct 12, 2005 8:35 am Post subject:
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Why not? I argued music with musicology graduates too, and won ;¬).
Nah, I don't realy want to argue, just know how to prepare the coffee. Water just under the boiling point at high pressure simply is more then 100°C (of cource it cools down rather quickly after it comes out of the pressurised area), there's not much there to argue about.
S.I. is Systeme Internationale (international system), basically what you would call metrics, used by some countries, except that the man (and espeically woman) on the street will use Cal. instead of Joule for reasons I never understood and that HP still gets used instead of Watt for reasons I don't get either. Sientists regardless of country use it because sientists don't like arthmetic, at least not as much as many people believe they do, and there are way less constants and weird nonlinear factors when calculating based on the S.I.. It's generally a very good idea to use it, I think, unfortunately it was a mostly French idea so some of those English speaking countries don't like it. This means those contries are stuck with a system that counts partally in a system based on 12, partialy on decimal and they are stuck with foots and thumbs and stones and heaven knows what other medieval affairs. Probably still use a lunar callender too.
:¬p _________________ Kassen |
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mosc
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Joined: Jan 31, 2003 Posts: 18288 Location: Durham, NC
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Posted: Wed Oct 12, 2005 12:25 pm Post subject:
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Most Americans would call this the metric system or the MKS system.
http://www.unc.edu/~rowlett/units/cgsmks.html
It is unfortunate that a new name based on French would have difficulty being accepted. At least the French can be proud of GSM. It's being used in the US by Cingular, which is not the biggest mobile telephone company, and they haven't changed the name.  _________________ --Howard
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v-un-v
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Joined: May 16, 2005 Posts: 8932 Location: Birmingham, England, UK
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Posted: Wed Oct 12, 2005 12:27 pm Post subject:
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| Kassen wrote: | Nah, I don't realy want to argue, just know how to prepare the coffee. Water just under the boiling point at high pressure simply is more then 100°C (of cource it cools down rather quickly after it comes out of the pressurised area), there's not much there to argue about.
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yep- kassen is right The same theory applies to the pressure cooker- and the steam train- if you like.
It's funny- I too wonder about that too. Perhaps it only applies to instant coffee? I know that if you pour boiling water on instant coffee it tastes bitter. But it's hard to make a decision anyhow because instant coffee generally tastes bad anyway!
I think we should spank him (Kassen) anyway  |
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Kassen
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Joined: Jul 06, 2004 Posts: 7678 Location: The Hague, NL
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Posted: Wed Oct 12, 2005 12:44 pm Post subject:
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Spank me? What for now? It's not my fault! I'm not the one who wants to have water that's not too hot yet is also remarkably hot for water in a liquid state at the same time!
That guy seems to attach a lot of value to having the water under enough pressure and aparently it's not for keeping it very hot so perhaps it's the power of the steam rushing out that's of importance to him?
Anyway, GSM is a better idea for mobile phones anyway, it' s a case like the 50Hz vs 60Hz powergrids. In both cases some issues were discovered after the system was implemented in the U.S. so when the Eurpeans thought it'd be nice to have one too they improved on the design.
Now we have all sorts of silly issues like video gaems that run slower in Europe die to the lower television framerate here. _________________ Kassen |
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mosc
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Joined: Jan 31, 2003 Posts: 18288 Location: Durham, NC
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Posted: Wed Oct 12, 2005 1:12 pm Post subject:
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I'm not sure there is anything to argue about. He says with the French press to use water that is below the boiling point - best if 190 - 200 F, the range used in espresso. There is no pressure with the French press device. He says it is not espresso, but a different beast. He does say it is the best method if you don't use espresso.
Apparently in espresso, the temperature is 190-200 F and it is under high pressure (15 bars) in the brewing chamber. _________________ --Howard
my music and other stuff Last edited by mosc on Wed Oct 12, 2005 1:36 pm; edited 1 time in total |
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mosc
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Kassen
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Joined: Jul 06, 2004 Posts: 7678 Location: The Hague, NL
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Posted: Wed Oct 12, 2005 1:27 pm Post subject:
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I suspect it's different. I suspect with esspresso the water will be that temperature once it's out of the coffee again or on average while it's inside of the coffee powder. If it's that temperature under high pressure in the boiling chamber then I don't think it'll come out as steam because by definition water only becomes steam above it's boiling point (even if that boiling point may float about depending on the pressure). The steam will cool down rather rapidly, more rapidly then water just below the boiling point, once exposed to air because shifting to gasseaus form will cost it energy as well as the fact that it will have a greater area of exposure to the outside air. I don't think it makes sense to have all that pressure if you don't intend to get it above it's normal boiling point.
I sugest we do research and have Cebec plot it all out on nice graphs. We can then send a bug report to MIT, South America or both. _________________ Kassen |
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mosc
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Posted: Wed Oct 12, 2005 1:45 pm Post subject:
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| Kassen wrote: | | I sugest we do research and have Cebec plot it all out on nice graphs. We can then send a bug report to MIT, South America or both. |
Good plan...
It looks like the pressure doesn't come from the water boiling in the the espresso maker, but either from an electric pump or a manually operated lever. Like the guy said, the lever is for the incurable romantics. With the lever, you can get just the right pressure and you can tell if the grind is right by carefully observing the resistance.
I'm getting wired just thinking about this gizmo...
 _________________ --Howard
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v-un-v
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Joined: May 16, 2005 Posts: 8932 Location: Birmingham, England, UK
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Posted: Wed Oct 12, 2005 2:54 pm Post subject:
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| mosc wrote: | | It looks like the pressure doesn't come from the water boiling in the the espresso maker, but either from an electric pump or a manually operated lever. |
No coffee machine that delivers under pressure that I know works like that. You just need a big chamber under pressure full of water. Keep the pressure up and it keeps going- no pump needed- again same principle as the boiler of a steam engine.
PS illy make damn fine coffee. |
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seraph
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Joined: Jun 21, 2003 Posts: 12398 Location: Firenze, Italy
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Posted: Wed Oct 12, 2005 3:20 pm Post subject:
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| The Why Project wrote: |
Now after all this writing... |
excellent recollection of coffee related events  _________________ homepage - blog - forum - youtube
| Quote: | | Don't die with your music still in you - Wayne Dyer |
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seraph
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Joined: Jun 21, 2003 Posts: 12398 Location: Firenze, Italy
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Posted: Wed Oct 12, 2005 3:36 pm Post subject:
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| mosc wrote: |
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I used to have that Pavoni coffee machine but I stopped using it because I am too lazy to operate it. _________________ homepage - blog - forum - youtube
| Quote: | | Don't die with your music still in you - Wayne Dyer |
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mosc
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Posted: Wed Oct 12, 2005 5:12 pm Post subject:
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Well, prey tell, what do you use now, and how does the coffee compare? _________________ --Howard
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mosc
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Posted: Wed Oct 12, 2005 5:14 pm Post subject:
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| v-un-v wrote: | | mosc wrote: | | It looks like the pressure doesn't come from the water boiling in the the espresso maker, but either from an electric pump or a manually operated lever. |
No coffee machine that delivers under pressure that I know works like that. You just need a big chamber under pressure full of water. Keep the pressure up and it keeps going- no pump needed- again same principle as the boiler of a steam engine.
PS illy make damn fine coffee. |
Then why to these machines have pumps if they don't have pumps?  _________________ --Howard
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Kassen
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Joined: Jul 06, 2004 Posts: 7678 Location: The Hague, NL
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Posted: Wed Oct 12, 2005 5:49 pm Post subject:
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| mosc wrote: |
Then why to these machines have pumps if they don't have pumps?  |
You mean that handle? wouldn't that be to exert force on the pressure compartment in order to shut it?
I think the pressure comes from heating the water; even before it boils it'll expand. Then, given enough watter in a small enough space the pressure will rise to the point where the water's boiling point is increased.
Don't you have a pressure cooker? they do the same, except that the idea is to keep the hot water inside instead of letting it blow out as hot steam. Opening the safety on a presurecooker will do the same as the expresso machine, except to your hand instead of coffee. I proved in a scientiffic experiment back when I was small that the steam that comes out is indeed realy, realy hot and doesn't feel at all like care has been taken to avoid high temperatures that cause bitterness......
:¬) _________________ Kassen |
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mosc
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Posted: Wed Oct 12, 2005 7:05 pm Post subject:
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After doing more research, the units with the electric pumps use the pumps to pull water from the storage tank into the boiler chamber. _________________ --Howard
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elektro80
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Joined: Mar 25, 2003 Posts: 21959 Location: Norway
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Posted: Wed Oct 12, 2005 7:21 pm Post subject:
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OK.. nothing like the Austin Powers stuff then
That would be swedish made I reckon. _________________ A Charity Pantomime in aid of Paranoid Schizophrenics descended into chaos yesterday when someone shouted, "He's behind you!"
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mosc
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Posted: Wed Oct 12, 2005 7:41 pm Post subject:
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Wait, read this about espresso machines: http://www.jlhufford.com/articles/espressokinds.htm
| Quote: | The pressure for brewing espresso is achieved by pulling on a hand lever which is attached to a piston. The piston then pushes water through a heating element, through the coffee grounds, and into a waiting cup.
Advantages
* Precise control over pressure applied (up to about 8 bar), plus water need not be boiled to be pressed through the grounds means an exquisite crema is possible.
* Usually a thermometer is included, so you know when to brew (190 degrees) and when to froth (260 degrees).
* Porta-filter is heavy-duty, like the machine's hull. |
So I was right, the pumps are used for pressure brewing.
| Quote: | | Many folks like using an electric steam espresso machine for a slightly stronger coffee. However, given the advent of the next type of machine [pump machines], boiler machines are sort of out of step with mainstream espresso conoisseurs. |
 _________________ --Howard
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seraph
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Joined: Jun 21, 2003 Posts: 12398 Location: Firenze, Italy
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v-un-v
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Posted: Thu Oct 13, 2005 4:51 pm Post subject:
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wahhhhh- is that Mummy, Daddy and Baby one ? So cute  |
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elektro80
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Joined: Mar 25, 2003 Posts: 21959 Location: Norway
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Posted: Sun Oct 30, 2005 3:15 pm Post subject:
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Carlo, is this stuff allowed?
 _________________ A Charity Pantomime in aid of Paranoid Schizophrenics descended into chaos yesterday when someone shouted, "He's behind you!"
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seraph
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Joined: Jun 21, 2003 Posts: 12398 Location: Firenze, Italy
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Posted: Sun Oct 30, 2005 3:18 pm Post subject:
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| elektro80 wrote: | | Carlo, is this stuff allowed? |
now you talk  _________________ homepage - blog - forum - youtube
| Quote: | | Don't die with your music still in you - Wayne Dyer |
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elektro80
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Joined: Mar 25, 2003 Posts: 21959 Location: Norway
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Posted: Sun Oct 30, 2005 3:22 pm Post subject:
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The lavazza stuff is what I usually buy. Absolutely decent coffee. _________________ A Charity Pantomime in aid of Paranoid Schizophrenics descended into chaos yesterday when someone shouted, "He's behind you!"
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seraph
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Posted: Sun Oct 30, 2005 3:29 pm Post subject:
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| elektro80 wrote: | | The lavazza stuff is what I usually buy. Absolutely decent coffee. |
repent yourself you have not always bought that  _________________ homepage - blog - forum - youtube
| Quote: | | Don't die with your music still in you - Wayne Dyer |
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elektro80
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Posted: Sun Oct 30, 2005 4:05 pm Post subject:
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What can a poor addict do when the good stuff is being kept off the streets?
A conspiracy I tell you. _________________ A Charity Pantomime in aid of Paranoid Schizophrenics descended into chaos yesterday when someone shouted, "He's behind you!"
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mosc
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