O2 Metabolic Rates, Oriffice Sizes, ..... Questions...

decoweenie · 11th June 2006, 22:39

Quote: (Originally Posted by gibbogeo)

In mine plastic valve there is the lennox laser 0.0035" orifice...

The 0.0035" has been supplied as the standard orifice for a few years now. Optional item is the 0.004" if specifically requested. So I am sure they are the same size/shape.

Our conditions aren't as wonderful as the Carribean, but it is fairly warm as well.

And geologists should find job easily.

As for Environmental Engineers, we just leave them in the desert along with the environmental hazards...

lizardland · 11th June 2006, 23:11

Quote: (Originally Posted by decoweenie)

Mine was sn: 007 and I was able to change between the 2 orifices without any problem back in 2002. May be the new one has a different shape ?

I also have two old style cylindrical KISS valves, they both have Norgren orifices with no problem.

***caveseeker7*** · 12th June 2006, 00:49

Quote: (Originally Posted by abowie)

Perhaps if you were to post some pictures we could offer some suggestions...

Andrew, she needs her metabolic rate to increase, not yours.

Scuba_Vixen · 12th June 2006, 02:28

Quote: (Originally Posted by abowie)

Perhaps if you were to post some pictures we could offer some suggestions...

Andrew, Can I interest you in a nice pair...............

(of fins)

Darlene

E-man · 12th June 2006, 04:09

I'll take two thanks

abowie · 12th June 2006, 04:27

I can see why you would prefer a Rebreather with back mounted counterlungs :-)

I am very taken with the fins.

SINUS · 12th June 2006, 04:42

Be very careful guys, with her huge o2 reserves in her,she might causes spontaneous o2 combustion - Is she o2 compatible?

Cheers

Wei lan

PeteS · 12th June 2006, 05:07

Quote: (Originally Posted by SINUS)

Be very careful guys, with her huge o2 reserves in her,she might causes spontaneous o2 combustion - Is she o2 compatible?

I think you'll find the rubber suit isn't......

**Freef** · 12th June 2006, 07:18

Quote: (Originally Posted by decoweenie)

David,

Unless I miscalculate, when plugging in CCR relevant data (i.e. PO2 is constant at all depth), your SCR equation will simply be:

Rate(out) (1 - loopFiO2) = Rate(in) (1 - loopFiO2), or

Out = In

With an ideal dive, you would be able to work out the vO2 based purely on O2 consumption, ie if you use 20 bar out of a 3L cylinder [60 bar in total] on an hour long dive your vO2 would be 1 l/min.

But with CCR you would also have to work out the dilutent use as it too contains oxygen. With air and 20 bar of dilutent used [from a 3L] you then have [20 x 3] + [0.21 x 20 x 3], a total of 72.6L, 1.21 L/min.

Of course, if you had a dilutent with no O2 present that would help, but it would be more than slightly unsafe!

When you add in factors such as different set points during the dive things get more complex, but with a known flow rate you should still be able to work out the vO2 using my formula, or if you did a 20 min fixed depth dive and noted the start and end pressures of O2 and knew the flow rate [while keeping the pO2 contstant] you would be able to work it out fom there.

David.

decoweenie · 12th June 2006, 07:24

Never mind...

11th June 2006, 22:39	#21 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,487	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... Quote: (Originally Posted by gibbogeo) In mine plastic valve there is the lennox laser 0.0035" orifice... The 0.0035" has been supplied as the standard orifice for a few years now. Optional item is the 0.004" if specifically requested. So I am sure they are the same size/shape. Our conditions aren't as wonderful as the Carribean, but it is fairly warm as well. And geologists should find job easily. As for Environmental Engineers, we just leave them in the desert along with the environmental hazards...
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11th June 2006, 23:11	#22 (permalink)
lizardland Yak Current Rebreather/s: MK 15.X Home Build Other Rebreather/s: Classic Kiss Home Build Join Date: Mar 2005 Location: North... Posts: 1,301	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... Quote: (Originally Posted by decoweenie) Mine was sn: 007 and I was able to change between the 2 orifices without any problem back in 2002. May be the new one has a different shape ? I also have two old style cylindrical KISS valves, they both have Norgren orifices with no problem. __________________ Can you imagine drifting along in the sea with your mouth open and a load of f***ing plankton going in? You'd like it, would you? www.westons-cider.co.uk Azerbaijani Association of Technical Divers Publicity Officer and Goat Wrangler
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12th June 2006, 00:49	#23 (permalink)
*caveseeker7* Who loves ya, baby Current Rebreather/s: Sport Kiss Other Rebreather/s: Prism Topaz Join Date: Jan 2005 Location: Too far from Neverland Posts: 5,451	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... Quote: (Originally Posted by abowie) Perhaps if you were to post some pictures we could offer some suggestions... Andrew, she needs her metabolic rate to increase, not yours. __________________ Cheers Stefan "Political Correctness is a doctrine, fostered by a delusional, illogical minority, and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a turd by the clean end.!"
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12th June 2006, 02:28	#24 (permalink)
Scuba_Vixen e/mCCR Dolphin Pilot Current Rebreather/s: Other CCR Home Build Other Rebreather/s: Other CCR Home Build Join Date: May 2005 Location: St. Croix USVI Posts: 557	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... Quote: (Originally Posted by abowie) Perhaps if you were to post some pictures we could offer some suggestions... Andrew, Can I interest you in a nice pair............... (of fins) Darlene
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12th June 2006, 04:09	#25 (permalink)
E-man On the loop! Current Rebreather/s: Inspiration Classic Optima Other Rebreather/s: Titan Join Date: Sep 2005 Location: Eastern Coast ;) Posts: 212	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... I'll take two thanks
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12th June 2006, 04:27	#26 (permalink)
abowie Fighting Girl Current Rebreather/s: Sport Kiss Other Rebreather/s: Join Date: May 2005 Location: Land of Oz Posts: 574	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... I can see why you would prefer a Rebreather with back mounted counterlungs :-) I am very taken with the fins. __________________ Andrew Bowie Rebreather-friendly Buddy
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12th June 2006, 04:42	#27 (permalink)
SINUS Rebreather Aficionado Current Rebreather/s: Other SCR Other Rebreather/s: Other SCR Join Date: Apr 2005 Location: 137km from equator Posts: 196	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... Be very careful guys, with her huge o2 reserves in her,she might causes spontaneous o2 combustion - Is she o2 compatible? Cheers Wei lan __________________ "Silence Is Always Beautiful"
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12th June 2006, 05:07	#28 (permalink)
PeteS Consent Issued! Current Rebreather/s: Inspiration Classic Inspiration Vision Other Rebreather/s: Join Date: Jun 2005 Location: New Zealand Posts: 533	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... Quote: (Originally Posted by SINUS) Be very careful guys, with her huge o2 reserves in her,she might causes spontaneous o2 combustion - Is she o2 compatible? I think you'll find the rubber suit isn't...... __________________ Pete S. http://www.steggle.co.nz Every silver lining has a cloud
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12th June 2006, 07:18	#29 (permalink)
Freef Custom Title Disallowed! Current Rebreather/s: Dolphin Other Rebreather/s: Dolphin Join Date: Jan 2006 Location: Land of the Freef, UK. Posts: 1,353	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... Quote: (Originally Posted by decoweenie) David, Unless I miscalculate, when plugging in CCR relevant data (i.e. PO2 is constant at all depth), your SCR equation will simply be: Rate(out) (1 - loopFiO2) = Rate(in) (1 - loopFiO2), or Out = In With an ideal dive, you would be able to work out the vO2 based purely on O2 consumption, ie if you use 20 bar out of a 3L cylinder [60 bar in total] on an hour long dive your vO2 would be 1 l/min. But with CCR you would also have to work out the dilutent use as it too contains oxygen. With air and 20 bar of dilutent used [from a 3L] you then have [20 x 3] + [0.21 x 20 x 3], a total of 72.6L, 1.21 L/min. Of course, if you had a dilutent with no O2 present that would help, but it would be more than slightly unsafe! When you add in factors such as different set points during the dive things get more complex, but with a known flow rate you should still be able to work out the vO2 using my formula, or if you did a 20 min fixed depth dive and noted the start and end pressures of O2 and knew the flow rate [while keeping the pO2 contstant] you would be able to work it out fom there. David. __________________ David. Currently owner of two differently sized ankles.
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12th June 2006, 07:24	#30 (permalink)
decoweenie Crash Test Dummy Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Feb 2005 Location: Cairo Posts: 5,487	Re: O2 Metabolic Rates, Oriffice Sizes, ..... Questions... Never mind...
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