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paulraymaekers · 17th May 2008, 03:47

Quote: (Originally Posted by silent running)

Hi Paul, I know we have been over this stuff many times, but I'm not sure I understand what you're saying below.

If this were somehow true, then are you also saying that the shape/form of the scrubbers doesn't matter at all and that the different scrubber types used by various manufacturers are just aesthetic choices? How can you seperate dwell time from the gas flow characteristics of different shapes? I don't see how what happens inside the sorb can be isolated from the gas flow characteristics of the inlet and outlet of a scrubber and it's shape.

No, the main difference between axial and radial is a physical one-the length of grain boundary, the surface area of the inlet and outlet and the shape of the scrubber. In other words, the gas path. Insulating characteristics very from design to design and include variables such as flow direction and material types used in the scrubber itself and the housing.

OK Paul, but aren't "absorbant capabilities" increasing and "non linear" given the expanding sorb area and reaction front found in an in-out radial with surface area increasing as the gas moves radially outward? -Andy

Andy, I will not start the whole issue again, I have debated it more then enough..

If this were somehow true, then are you also saying that the shape/form of the scrubbers doesn't matter at all and that the different scrubber types used by various manufacturers are just aesthetic choices?

I'm not saying that at all, but I do say that if they contain the same XXkg of sorb, then the well time is the same. There are huge differences in performance, partly because of the size (=kilo's), partly because of shape (thermal), partly because of what happens OUTSIDE the scrubber (thermal, flowcurve)

see what happens with the new sentinel: a small axial scrubber, performing better then any other (under specific conditions: the CE, not under other conditions..)

please remember: a radial is nothing more then a large surface, thin, axial, that has been curved in the shape of a tube (bent so that the sides touches)

regards
paul

17th May 2008, 03:47	#29 (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: 1,496	Re: New Meg Radial Scrubber Quote: (Originally Posted by silent running) Hi Paul, I know we have been over this stuff many times, but I'm not sure I understand what you're saying below. If this were somehow true, then are you also saying that the shape/form of the scrubbers doesn't matter at all and that the different scrubber types used by various manufacturers are just aesthetic choices? How can you seperate dwell time from the gas flow characteristics of different shapes? I don't see how what happens inside the sorb can be isolated from the gas flow characteristics of the inlet and outlet of a scrubber and it's shape. No, the main difference between axial and radial is a physical one-the length of grain boundary, the surface area of the inlet and outlet and the shape of the scrubber. In other words, the gas path. Insulating characteristics very from design to design and include variables such as flow direction and material types used in the scrubber itself and the housing. OK Paul, but aren't "absorbant capabilities" increasing and "non linear" given the expanding sorb area and reaction front found in an in-out radial with surface area increasing as the gas moves radially outward? -Andy Andy, I will not start the whole issue again, I have debated it more then enough.. If this were somehow true, then are you also saying that the shape/form of the scrubbers doesn't matter at all and that the different scrubber types used by various manufacturers are just aesthetic choices? I'm not saying that at all, but I do say that if they contain the same XXkg of sorb, then the well time is the same. There are huge differences in performance, partly because of the size (=kilo's), partly because of shape (thermal), partly because of what happens OUTSIDE the scrubber (thermal, flowcurve) see what happens with the new sentinel: a small axial scrubber, performing better then any other (under specific conditions: the CE, not under other conditions..) please remember: a radial is nothing more then a large surface, thin, axial, that has been curved in the shape of a tube (bent so that the sides touches) regards 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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