<div dir="ltr"><div>Hank, see <a href="http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjJiIXF2JrbAhUPm1kKHWmgA5AQFggpMAA&url=http%3A%2F%2Fwww.dtic.mil%2Fget-tr-doc%2Fpdf%3FAD%3DADA160181&usg=AOvVaw0P9kLuZ_ll9Sy3A4KEep45">http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjJiIXF2JrbAhUPm1kKHWmgA5AQFggpMAA&url=http%3A%2F%2Fwww.dtic.mil%2Fget-tr-doc%2Fpdf%3FAD%3DADA160181&usg=AOvVaw0P9kLuZ_ll9Sy3A4KEep45</a></div><div>NCSC TECHMAN 4110-1-83(A) pages 8-11 for those factors that affect how the scrubber performs. Key items are temperature, relative humidly, and residence time of the CO2 laden air in the scrubber. I don't think the CO2 absorption process cares about the level of CO2 in the incoming air. But what it does impact the scrubber performance is changing the flow rate through the scrubber via the rpm change of the blower motor. If the flowrate is to high, the gas channels through the scrubber and there is insufficient time for the absorption to take place, thus the CO2 level will climb. If the flow rate through the scrubber is to low, CO2 generation could be faster than scrubber can remove the CO2, thus the CO2 will climb. See report for suggested minimum and maximum velocity through the scrubber. What will change in going from one to two persons is that you have twice (more or less) the CO2 generation thus you need twice the CO2 absorbent on board for a given period of time. As an example for my boat (one man), 0.28 lbs of SodaSorbHP per person per hour is required. So for a ABS 72 hour minimum, I carry 20 lbs of SodasorbHP. If I had a passenger I would need to have 40 lbs of SodaSorbHP on board.</div><div><br></div><div>If it were me, I would put two people in the boat and do test at 1600 rpm and 3200 rpm and see which of these enables you to hold the CO2 ppm below 1000-2000 ppm. Also need to measure the current to the blower in both cases to and see if auxiliary battery bank has the capacity to handle this current for 72 hours.</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Tue, May 22, 2018 at 8:02 PM, Brian Cox via Personal_Submersibles <span dir="ltr"><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="font-family:Arial,sans-serif;font-size:10pt"><div>Hank, Which sub is it that you're thinking Titanic ? What is the status of that sub? </div><div> </div><div>And was that link helpful on the Sofnolime? </div><div> </div><div>Brian<br><br>--- <a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a> wrote:<br><br>From: hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>><br>To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>><br>Subject: [PSUBS-MAILIST] scrubber performance<br>Date: Wed, 23 May 2018 00:33:18 +0000 (UTC)<br><br></div><div style="font-family:Helvetica Neue,Helvetica,Arial,sans-serif;font-size:13px"><div>Hi all,</div><div>I was testing my two scrubbers today and wonder if a scrubber performs better when the CO2 level is higher? So when my system is running at 1600 PPM with one person, will it then run at 3200 with two persons? I don't have two persons at the moment to try.</div><div>Hank</div><br></div>______________________________<wbr>_________________
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