295 minutes till break trough on rEvo dual radial :-)

netmage · 21st May 2008, 19:54

Congrats Paul....

With the unique dual scrubber design of the rEvo, I'm having difficulty wrapping my head how the flow works w/ a dual radial implementation....

Got any stick figures showing how it works?

-Tim

paulraymaekers · 21st May 2008, 19:57

Quote: (Originally Posted by netmage)

Congrats Paul....

With the unique dual scrubber design of the rEvo, I'm having difficulty wrapping my head how the flow works w/ a dual radial implementation....

Got any stick figures showing how it works?

-Tim

just replace each axial with a big radial :-)

actually there are more possibilities: for the test we did twice in>out
but it is possible that out>in and then in>out performs even better

... so many things to study...

paul

Stephane · 21st May 2008, 20:04

Paul,

When will the radial scrubbers be available and what will be the approximative price?

sdwenham · 21st May 2008, 20:11

Hi Paul,

That is a very impressive result. Nice to know you always have something up your sleeve to make the rEvo better and better.

Did you do any WOB tests on the radials? Was it better, worse or same as the axials?

Sam

Only 9 days till I get my rEvo

paulraymaekers · 21st May 2008, 20:24

Quote: (Originally Posted by sdwenham)

Hi Paul,

That is a very impressive result. Nice to know you always have something up your sleeve to make the rEvo better and better.

Did you do any WOB tests on the radials? Was it better, worse or same as the axials?

Sam

Only 9 days till I get my rEvo

the radials have better WOB than the axials, but not so much: remember they contain 50% more sorb than the axials.

also remember that WOB has mostly to do with the mouthpiece, flappervalves etc..

paul

paulraymaekers · 21st May 2008, 20:25

Quote: (Originally Posted by Stephane)

Paul,

When will the radial scrubbers be available and what will be the approximative price?

price was already fixed a long time ago: see the price list on our web

available... 2 months from now?

paul

silent running · 21st May 2008, 21:20

Quote: (Originally Posted by paulraymaekers)

Hello all, having passed monday and thuesday at ANSTI test center in the UK: testing the performance of the new dual radial scrubber.

under pure CE 14143 conditions: 4° celcius (it was more 3.5), at 40m depth, CO2 injection 1.6l/min, 40 l/min RMV,
the scrubber lasted 295 minutes till it reached 0.1% surface equivalent CO2 (5mbar at 40m depth)
then it lasted another extra hour before it reached 0.2% (10mbar at 40m)

the dual scrubber contains 2 times 2.05 kg sorb (4.1 kg total, so +/- 9 pound)
sorb used for the test was the fine grade sofnolime

this means the rEvo dual radial scrubber has a performance of 72minutes/kg, and
is at this moment the best performing radial scrubber on the market, compared to any radial that has officially been tested according to the CE14143 norm

no need to say that we are extremely satisfied with the result, and even knowing that with some small adjustments we easely can reach over 5 hours till breaktrough under those extreme conditions.

we also did the same test with another brand of sorb, and at the moment we can only say that under those cold conditions there is an extreme difference in performance between different types of sorb. More tests have to be made to be conclusive, but at the moment it seems a good advice that if you dive in very cold conditions, use the fine grade sofnolime...

best regards

paul

just for the record: the tests were carried out by the staff of ANSTI themselve

Hi Paul, congratulations and thanks for posting the data.

If I remember correctly, the scrubber data on the CCRB comparison chart stated that the rEvo dual axial was 142 minutes to breakthrough under the CE standard, is this right and how many kgs are in the dual axial version?

And stop beating around the bush and tell us which brand of sorb performed poorly in the cold, inquiring minds want to know

... -Andy

**Gill Envy** · 21st May 2008, 21:45

Pual, you mentioned the other day that there should be no difference in radial vs axial capacity to absorb co2 and therefore no appreciable difference, lb for lb, in duration. Am I reading this right that you are now seeing that with a 50% increase in sorb, your radial scrubber has 100% more duration? Are you now a convert? How do you explain the increased efficiency?

In any case, congratulations on your new scrubber design... will it be possible to replace half at a time like on the axial version?

so many rebreathers, so little time!

g

Quote: (Originally Posted by paulraymaekers)

the radials have better WOB than the axials, but not so much: remember they contain 50% more sorb than the axials.

also remember that WOB has mostly to do with the mouthpiece, flappervalves etc..

paul

obakesan82 · 21st May 2008, 21:47

Wow! Congratulations Paul, put me on the list as well

Regards,

Ed

silent running · 22nd May 2008, 01:26

Quote: (Originally Posted by paulraymaekers)

the radials have better WOB than the axials, but not so much: remember they contain 50% more sorb than the axials.

also remember that WOB has mostly to do with the mouthpiece, flappervalves etc..

paul

Paul, I didn't see this until after I posted the questions above. So if the axials have exactly half as much sorb and they get 142 minutes, I guess this means that the radials did better by 11 minutes, which at such a high rate of CO2addition/flow should translate into much more than 11 minutes in real world conditions. Your thoughts?

Also, do the CE scrubber test protocol require an averaging of multiple tests, or is it a single run? Thanks, -Andy

21st May 2008, 19:54	#11 (permalink)
netmage Tim Owens Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Dec 2005 Location: Coconut Creek, FL Posts: 510	Re: 295 minutes till break trough on rEvo dual radial :-) Congrats Paul.... With the unique dual scrubber design of the rEvo, I'm having difficulty wrapping my head how the flow works w/ a dual radial implementation.... Got any stick figures showing how it works? -Tim __________________ "You want a bailout bottle? Go get the pink one from Fill Express, BTCH!" - John Cogan "If I sent my rebreather back, I might live longer, but would I live* more?" - Abbo
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21st May 2008, 19:57	#12 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,498	Re: 295 minutes till break trough on rEvo dual radial :-) Quote: (Originally Posted by netmage) Congrats Paul.... With the unique dual scrubber design of the rEvo, I'm having difficulty wrapping my head how the flow works w/ a dual radial implementation.... Got any stick figures showing how it works? -Tim just replace each axial with a big radial :-) actually there are more possibilities: for the test we did twice in>out but it is possible that out>in and then in>out performs even better ... so many things to study... paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
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21st May 2008, 20:04	#13 (permalink)
Stephane Stéphane Acounis Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2005 Location: Nantes - France Posts: 773	Re: 295 minutes till break trough on rEvo dual radial :-) Paul, When will the radial scrubbers be available and what will be the approximative price? __________________ Stéphane
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21st May 2008, 20:11	#14 (permalink)
sdwenham New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Nov 2007 Location: UK Posts: 11	Re: 295 minutes till break trough on rEvo dual radial :-) Hi Paul, That is a very impressive result. Nice to know you always have something up your sleeve to make the rEvo better and better. Did you do any WOB tests on the radials? Was it better, worse or same as the axials? Sam Only 9 days till I get my rEvo __________________ Cambsac (BSAC 240)
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21st May 2008, 20:24	#15 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,498	Re: 295 minutes till break trough on rEvo dual radial :-) Quote: (Originally Posted by sdwenham) Hi Paul, That is a very impressive result. Nice to know you always have something up your sleeve to make the rEvo better and better. Did you do any WOB tests on the radials? Was it better, worse or same as the axials? Sam Only 9 days till I get my rEvo the radials have better WOB than the axials, but not so much: remember they contain 50% more sorb than the axials. also remember that WOB has mostly to do with the mouthpiece, flappervalves etc.. paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials... Last edited by paulraymaekers : 21st May 2008 at 20:26.
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21st May 2008, 20:25	#16 (permalink)
paulraymaekers rEvo's daddy Current Rebreather/s: rEvo Other CCR Home Build Other Rebreather/s: rEvo Other CCR Home Build Join Date: May 2005 Location: belgium Posts: 1,498	Re: 295 minutes till break trough on rEvo dual radial :-) Quote: (Originally Posted by Stephane) Paul, When will the radial scrubbers be available and what will be the approximative price? price was already fixed a long time ago: see the price list on our web available... 2 months from now? paul __________________ www.rEvo-rebreathers.com .... the earth is flat, Elvis is alive, and radial scrubbers give longer dwell time than axials...
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21st May 2008, 21:20	#17 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,836	Re: 295 minutes till break trough on rEvo dual radial :-) Quote: (Originally Posted by paulraymaekers) Hello all, having passed monday and thuesday at ANSTI test center in the UK: testing the performance of the new dual radial scrubber. under pure CE 14143 conditions: 4° celcius (it was more 3.5), at 40m depth, CO2 injection 1.6l/min, 40 l/min RMV, the scrubber lasted 295 minutes till it reached 0.1% surface equivalent CO2 (5mbar at 40m depth) then it lasted another extra hour before it reached 0.2% (10mbar at 40m) the dual scrubber contains 2 times 2.05 kg sorb (4.1 kg total, so +/- 9 pound) sorb used for the test was the fine grade sofnolime this means the rEvo dual radial scrubber has a performance of 72minutes/kg, and is at this moment the best performing radial scrubber on the market, compared to any radial that has officially been tested according to the CE14143 norm no need to say that we are extremely satisfied with the result, and even knowing that with some small adjustments we easely can reach over 5 hours till breaktrough under those extreme conditions. we also did the same test with another brand of sorb, and at the moment we can only say that under those cold conditions there is an extreme difference in performance between different types of sorb. More tests have to be made to be conclusive, but at the moment it seems a good advice that if you dive in very cold conditions, use the fine grade sofnolime... best regards paul just for the record: the tests were carried out by the staff of ANSTI themselve Hi Paul, congratulations and thanks for posting the data. If I remember correctly, the scrubber data on the CCRB comparison chart stated that the rEvo dual axial was 142 minutes to breakthrough under the CE standard, is this right and how many kgs are in the dual axial version? And stop beating around the bush and tell us which brand of sorb performed poorly in the cold, inquiring minds want to know... -Andy
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21st May 2008, 21:45	#18 (permalink)
Gill Envy Shearwater Copis Divers Current Rebreather/s: Other CCR Other Rebreather/s: Evolution Other CCR Join Date: Nov 2005 Location: seattle Posts: 1,326	Re: 295 minutes till break trough on rEvo dual radial :-) Pual, you mentioned the other day that there should be no difference in radial vs axial capacity to absorb co2 and therefore no appreciable difference, lb for lb, in duration. Am I reading this right that you are now seeing that with a 50% increase in sorb, your radial scrubber has 100% more duration? Are you now a convert? How do you explain the increased efficiency? In any case, congratulations on your new scrubber design... will it be possible to replace half at a time like on the axial version? so many rebreathers, so little time! g Quote: (Originally Posted by paulraymaekers) the radials have better WOB than the axials, but not so much: remember they contain 50% more sorb than the axials. also remember that WOB has mostly to do with the mouthpiece, flappervalves etc.. paul __________________ Gill Envy ...Because I wasn't born with gills! ><(°>><(°>><(°>><(°>><(°>><(°>><(°>><(°>
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21st May 2008, 21:47	#19 (permalink)
obakesan82 New Member Current Rebreather/s: Classic Kiss rEvo Other CCR Dolphin Other Rebreather/s: Sport Kiss Classic Kiss rEvo Other CCR Dolphin Join Date: Nov 2005 Location: North Carolina Posts: 92	Re: 295 minutes till break trough on rEvo dual radial :-) Wow! Congratulations Paul, put me on the list as well Regards, Ed __________________ "Igitur qui desiderat pacem, praeparet bellum."
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22nd May 2008, 01:26	#20 (permalink)
silent running Mature mouth breather Current Rebreather/s: Prism Topaz Other Rebreather/s: Join Date: Jun 2005 Location: U.S.A. Brooklyn, New York Posts: 1,836	Re: 295 minutes till break trough on rEvo dual radial :-) Quote: (Originally Posted by paulraymaekers) the radials have better WOB than the axials, but not so much: remember they contain 50% more sorb than the axials. also remember that WOB has mostly to do with the mouthpiece, flappervalves etc.. paul Paul, I didn't see this until after I posted the questions above. So if the axials have exactly half as much sorb and they get 142 minutes, I guess this means that the radials did better by 11 minutes, which at such a high rate of CO2addition/flow should translate into much more than 11 minutes in real world conditions. Your thoughts? Also, do the CE scrubber test protocol require an averaging of multiple tests, or is it a single run? Thanks, -Andy
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