<div dir="ltr"><div>Did some looking into published info on CO2 concentrations in submarines. <font face="Calibri"><font size="3"><font color="#000000"><span> </span></font></font><font color="#000000" size="3">If you look at
work by Hager 2003 </font><span><font color="#000000" size="3"> </font></span><font color="#000000" size="3">for US NAVY, he
looked at nine nuclear fast attack boats and the average CO2 concentration for the observed was
3,500 ppm with a range of 0-10,600 ppm.</font><span><font color="#000000" size="3">
</font></span><font color="#000000" size="3">In the same report</font><span><font color="#000000" size="3"> </font></span><font color="#000000" size="3">he looked at
another 10 nuclear fast attack boats and the average of 4,100 ppm with a
range of 300,-11,300 ppm was observed. The reference for this work is:</font></font></div><div><font face="Calibri"><font color="#000000" size="3">.</font></font><font color="#000000" face="Times New Roman" size="3">
</font></div><p style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000">Hagar, R. 2003. Submarine Atmosphere
Control and Monitoring Brief for the COT Committee. Presentation at the First
Meeting on Emergency and Continuous Exposure Guidance Levels for Selected
Submarine Contaminants, January 23, 2003, Washington, DC.</font></span></p><font color="#000000" face="Times New Roman" size="3">
</font><font color="#000000" face="Times New Roman" size="3">
</font><p style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000">In a report by Gude and Schaefer in 1969
from US Navy Submarine Medial Center they studied ten subjects after a 20 days
of exposure on two patrols, they found their exposure was to 0.8-0.9% CO2 or
8,000-9,000 ppm. The reference for this data is:</font></span></p><font color="#000000" face="Times New Roman" size="3">
</font><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000">Gude, J.F. and Schafer, K.E. “The Effect
of Respotory Dead space of prolonged exposure to a submarine enviornment.<span> </span></font><font color="#000000">U.S. Navy Submarfine Medical ,report SMRL587,
4.p June 27,1969.</font></span></div><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000">It is important to note that nuclear subs remove CO2 from their boats in an intirely different way, that use a small contacting vessel and Amine solution specifically <font face="Comic Sans MS">monoethanolamine (MEA)<font face="Times New Roman"> that is recycled</font>. See <span style="line-height:115%;font-family:"calibri","sans-serif";font-size:11pt"><a href="http://www93.homepage.villanova.edu/michael.b.walsh/CO2Scrubber.htm">http://www93.homepage.villanova.edu/michael.b.walsh/CO2Scrubber.htm</a> PSubs and rebreathers use a absorption method.</span></font></font></span></div><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000"><br></font></span></div><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000">ABS rules require that we stay below 5000 ppm. So to me <font face="Calibri"><font size="3">as long as we can keep the CO2 levels below 5000 ppm for our boats we should be good. </font><font size="3"> </font></font></font></span></div><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000"><font face="Calibri"><font size="3">With a radial filter and using SodaSorbHP 4-8 mesh, the scrubber on my boat keeps the level below 2200 ppm with the average about 1500 ppm. </font></font></font></span></div><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000" face="Calibri" size="3"><br></font></span></div><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000" face="Calibri" size="3">I may have mentioned this before (sad to get old) but </font></span><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000" face="Calibri" size="3">there is an excellent report on CO2 scrubber design that Prepared by M. L. NUCKOLS, A. PURER, G. A. DEASON US Navy. <span style="line-height:115%;font-family:"calibri","sans-serif";font-size:11pt"> <span class="gmail-st"><font face="Arial"><font size="2">"<em><strong><font color="#6a6a6a">NCSC TECH MAN 4110-1-83</font></strong></em></font><font size="2">. I. (REVISION A). S00. TECHNICAL MANUAL tow. DESIGN GUIDELINES FOR. CARBON DIOXIDE SCRUBBERS. I. MAY 1983. </font></font></span></span></font></span></div><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000" face="Calibri" size="3"><font face="Times New Roman">
</font><p style="margin:0in 0in 10pt"><a href="http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwi1ycq5jIvSAhULqFQKHZntCgEQFggcMAA&url=http%3A%2F%2Fdtic.mil%2Fcgi-bin%2FGetTRDoc%3FAD%3DADA160181&usg=AFQjCNEkEuITHpiL3OhlPfSkacVD6iL3iA"><font color="#0000ff">http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwi1ycq5jIvSAhULqFQKHZntCgEQFggcMAA&url=http%3A%2F%2Fdtic.mil%2Fcgi-bin%2FGetTRDoc%3FAD%3DADA160181&usg=AFQjCNEkEuITHpiL3OhlPfSkacVD6iL3iA</font></a></p><font face="Times New Roman">
</font></font></span></div><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000"><font face="Calibri"><font size="3"><span></span></font></font><span><span>There a lot of technical info on scrubbers in this report. What we need is someone to take as a PSUB research project reading, digesting and converting this report into an Excel spreadsheet that we could use to evaluate our scrubber designs. We could then do some experiment work with our scrubber's to test the new spreadsheet. </span></span></font></span></div><p><br></p><div><font color="#000000" face="Times New Roman">Cliff</font></div><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><p><br></p><font color="#000000"><p><br></p><span><p><br></p><span><p><br></p><div style="margin:0in 0in 10pt"><br></div></span></span></font></span><div style="margin:0in 0in 10pt"><span lang="EN" style="line-height:115%;font-family:lora;font-size:13pt"><font color="#000000"><br></font></span></div><font color="#000000" face="Times New Roman" size="3">
</font></div><div class="gmail_extra"><br><div class="gmail_quote">On Sat, Feb 11, 2017 at 6:13 PM, Sean T. Stevenson 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><p dir="ltr">Hank, I can't help but think that you should be doing better than 1500 - 1700. How fast is the airflow through your scrubber, where is the meter in relation to it, and does the cabin air get well circulated?</p>
<p dir="ltr">Sean<br>
</p>
<br><br><div class="gmail_quote">On February 11, 2017 2:33:49 PM MST, hank pronk via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.<wbr>org</a>> wrote:<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;padding-left:1ex;border-left-color:rgb(204,204,204);border-left-width:1px;border-left-style:solid">
<div style="color:rgb(0,0,0);font-family:HelveticaNeue,Helvetica Neue,Helvetica,Arial,Lucida Grande,sans-serif;font-size:12px;background-color:rgb(255,255,255)"><div id="m_-2615278517997041211yui_3_16_0_ym19_1_1486848591597_2860">Hi All,</div><div id="m_-2615278517997041211yui_3_16_0_ym19_1_1486848591597_2860" dir="ltr">I did a scrubber test with my new 1kg radial scrubber. It keeps Gamma at 1570 ppm to 1700 ppm it seems to fluctuate for some reason. I am adding a discharge filter though because my absorbent was dusty. </div><div id="m_-2615278517997041211yui_3_16_0_ym19_1_1486848591597_2860" dir="ltr">Hank</div></div><p style="margin-top:2.5em;margin-bottom:1em;border-bottom-color:rgb(0,0,0);border-bottom-width:1px;border-bottom-style:solid"></p><pre class="m_-2615278517997041211k9mail"><hr><br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.<wbr>org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/<wbr>listinfo.cgi/personal_<wbr>submersibles</a><br></pre></blockquote></div></div><br>______________________________<wbr>_________________<br>
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