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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>From what I recall I believe it was 20kg for 2 people which is close. However I need to test. Hugh<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>via Personal_Submersibles<br><b>Sent:</b> Thursday, 24 April 2014 2:03 a.m.<br><b>To:</b> Personal Submersibles General Discussion<br><b>Subject:</b> Re: [PSUBS-MAILIST] Life support<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>No problem Sean,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>I believe my amount it right, it just didn't look consistent with the rest of psubs, but just based on the little amounts of O2 that a lot of psubbers are carrying, I don't believe most are carrying enough sodasorb either. I came up with 23lbs per person (46 lbs total).<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Thanks,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Scott Waters<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'> <o:p></o:p></span></p></div><blockquote style='border:none;border-right:solid blue 1.5pt;padding:0cm 0cm 0cm 6.0pt;margin-left:6.0pt;margin-top:5.0pt;margin-bottom:5.0pt' id=replyBlockquote><div id=wmQuoteWrapper><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>-------- Original Message --------<br>Subject: Re: [PSUBS-MAILIST] Life support<br>From: "Sean T. Stevenson via Personal_Submersibles"<br><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br>Date: Wed, April 23, 2014 6:48 am<br>To: Personal Submersibles General Discussion<br><<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>I'm sorry - I was short on time last night or I would have addressed the scrubbing as well. The design expected CO2 production rate is set by the rules in a similar manner. You need to look at the data sheet of your chosen scrubber media to find it's scrubbing capacity, efficiency, etc., then size the media volume accordingly (mission duration + 72 hours), and make sure that the flow path, flow rate / dwell time and so forth are sufficient to meet the rated capacity. Also, you might want to separate mission and emergency scrubbers to conserve media.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Sean<o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>On April 23, 2014 7:02:00 AM MDT, via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote: <o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Sean,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Seems like your results on O2 are the same that I found. I have (2) 80 cubic foot O2 tanks on my 2 man submarine. I am pretty sure most psubbers are not sticking to the mission time plus 72 hour requirement. I believe my figuring of 23 lbs of intersorb 812 per person is also close to correct and most psubbers are not carrying that as well. It seemed like a lot to me at the beginning based on my observations of other psubs, but I think it is correct.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Thanks,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Scott Waters<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'> <o:p></o:p></span></p></div><blockquote style='border:none;border-right:solid blue 1.5pt;padding:0cm 0cm 0cm 6.0pt;margin-left:6.0pt;margin-top:5.0pt;margin-bottom:5.0pt' id=replyBlockquote><div id=wmQuoteWrapper><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>-------- Original Message --------<br>Subject: Re: [PSUBS-MAILIST] Life support<br>From: "Sean T. Stevenson via Personal_Submersibles"<br><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>Date: Tue, April 22, 2014 8:13 pm<br>To: Personal Submersibles General Discussion<br><<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>According to the ABS rules, per (11/35.3), you need sufficient oxygen for the mission duration PLUS the 72 hour reserve.<br><br>Per (8/7.1), oxygen: 0.038 kg (0.084 lb) per hour, per person, at 1 atm.<br><br>x 72 hours emergency duration = 2.736 kg (6.032 lb) per person for 72 hours.<br><br>2.736 kg x (1000g/kg) x (mol O2/31.9988g O2) x (22.4 liters / mol O2) = 1915 liters (@ STP, ideal gas assumptions)<br><br>= 68 cubic feet oxygen per person for emergency reserve, additional oxygen appropriate to mission duration.<br><br>Sean<br><br><br><br>On 2014-04-22 17:52, swaters via Personal_Submersibles wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>I have been trying to make sure I have suffecent life support for 72 hours per ABS. It seems like the research varys a little. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>I am showing<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>*80 cubic feet of O2 per person<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>*23 lbs sodasorb per person<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Is this right?<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Thanks,<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>Scott Waters<o:p></o:p></span></p></div></blockquote><div class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><hr size=2 width="100%" align=center></span></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div></blockquote><pre style='text-align:center'><span style='color:black'><hr size=2 width="100%" align=center></span></pre><pre><span style='color:black'><br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></pre></div><div class=MsoNormal align=center style='text-align:center'><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'><hr size=2 width="100%" align=center></span></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Verdana","sans-serif";color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div></blockquote><p class=MsoNormal><br><br>__________ Information from ESET NOD32 Antivirus, version of virus signature database 9711 (20140423) __________<br><br>The message was checked by ESET NOD32 Antivirus.<br><br><a href="http://www.eset.com">http://www.eset.com</a><o:p></o:p></p></div> <BR><BR>__________ Information from ESET NOD32 Antivirus, version of virus signature database 9713 (20140423) __________<BR><BR>The message was checked by ESET NOD32 Antivirus.<BR><BR><A HREF="http://www.eset.com">http://www.eset.com</A><BR> </body></html>