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</o:shapelayout></xml><![endif]--></head><body lang=NL link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Alan, <o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Axial scrubber, radial fan..<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'>Emile<o:p></o:p></span></p><p class=MsoNormal><span style='mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b>Van:</b> Personal_Submersibles <personal_submersibles-bounces@psubs.org> <b>Namens </b>Alan James via Personal_Submersibles<br><b>Verzonden:</b> maandag 28 december 2020 19:41<br><b>Aan:</b> Cliff Redus via Personal_Submersibles <personal_submersibles@psubs.org><br><b>Onderwerp:</b> Re: [PSUBS-MAILIST] Scrubber design and materials<o:p></o:p></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif'>Following this discussion with interest. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif'>Emile I thought had an axial type scrubber<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif'>that held something like 10lb of absorbent. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif'>This would require a lot more power to move the air through maybe 1ft of absorbent, whereas David has a radial scrubber that only needs to push air through a 2" section of absorbent. Some good thoughts on power consumption under load Cliff. I wonder if the load increases as the absorbent is spent & becomes more soggy. Ie. is there more of a load toward the end of the dive than at the beginning. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif'>I am wanting to go with 2 smaller axial scrubbers, mainly to keep the size down. Am thinking of using an oversized axial fan to keep the noise down, and have automated speed control based on the CO2 level. <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif'>Alan<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Helvetica",sans-serif'><o:p> </o:p></span></p></div><div id="ydp2da2ec19yahoo_quoted_9810465822"><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>On Tuesday, December 29, 2020, 04:39:29 AM GMT+13, Cliff Redus via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote: <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p> </o:p></span></p></div><div><div id=ydp2da2ec19yiv9297322996><div><div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>The squire gage blower I use on the R300 scrubber is similar the one Emile has posted. <a href="https://datasheet.octopart.com/RL90-18-24-EBM-Papst-datasheet-68360.pdf" target="_blank">DC FLATPAKS.qxp (octopart.com)</a><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>Model Papst RL90-18/14N<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>Voltage 12-28VDC<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>Power 5W<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>Noise 58dBA<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>Current .21A<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>Air flow 24CFB at 0 in H20 differential pressure<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>Note that the flow rate through these fans/blowers are given at 0 differential pressure. You would need to look at the head curve on the datasheet to determine the actual flowrate through the fan/scrubber. It would be substantially reduced due to the pressure drop through the CO2 absorbent section. Also to meet ABS rules, you need to size this unit so the that the current draw is not so great as to pull the emergency battery down before reaching 72 hours of life support. On my boat, the hotel load is about 1.5 amps (life support and comms only). The emergency battery has a capacity of 110 Ah at 24V so a 1.5A hotel load will last 73 hours. I did a garage test to confirm.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'>Cliff<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif;color:#26282A'><o:p> </o:p></span></p></div></div><div id="ydp2da2ec19yiv9297322996ydp91541ad3yahoo_quoted_9393167247"><div><div id=ydp2da2ec19yiv9297322996yqt10271><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>On Sunday, December 27, 2020, 11:39:56 PM CST, David Colombo via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote: <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'><o:p> </o:p></span></p></div><div><div id=ydp2da2ec19yiv9297322996ydp91541ad3yiv7167565153><div><div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>Hi Brian, here is the data on the fan. I havent ran any tests yet to see if the watts rating are at full speed. I am adding a dimmer circuit as well.<o:p></o:p></span></p><div><ul style='margin-top:0cm' type=disc><li class=MsoNormal style='color:#111111;mso-list:l0 level1 lfo1;background:white'><span style='font-size:11.5pt;font-family:"Arial",sans-serif'>Rated Voltage: 12V<o:p></o:p></span></li><li class=MsoNormal style='color:#111111;mso-list:l0 level1 lfo1;background:white'><span style='font-size:11.5pt;font-family:"Arial",sans-serif'>Rated Current: 1.0A<o:p></o:p></span></li><li class=MsoNormal style='color:#111111;mso-list:l0 level1 lfo1;background:white'><span style='font-size:11.5pt;font-family:"Arial",sans-serif'>Connecter: XH2.54-2Pin<o:p></o:p></span></li><li class=MsoNormal style='color:#111111;mso-list:l0 level1 lfo1;background:white'><span style='font-size:11.5pt;font-family:"Arial",sans-serif'>Power: 11W<o:p></o:p></span></li><li class=MsoNormal style='color:#111111;mso-list:l0 level1 lfo1;background:white'><span style='font-size:11.5pt;font-family:"Arial",sans-serif'>Speed: 3000RPM<o:p></o:p></span></li><li class=MsoNormal style='color:#111111;mso-list:l0 level1 lfo1;background:white'><span style='font-size:11.5pt;font-family:"Arial",sans-serif'>Air flow:38.5CFM<o:p></o:p></span></li><li class=MsoNormal style='color:#111111;mso-list:l0 level1 lfo1;background:white'><span style='font-size:11.5pt;font-family:"Arial",sans-serif'>Noise:45dBA<o:p></o:p></span></li></ul></div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>David<o:p></o:p></span></p><div><div id=ydp2da2ec19yiv9297322996ydp91541ad3yiv7167565153yqt44878><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>On Sun, Dec 27, 2020, 6:24 PM Brian Cox via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></span></p></div><blockquote style='border:none;border-left:solid #CCCCCC 1.0pt;padding:0cm 0cm 0cm 6.0pt;margin-left:4.8pt;margin-right:0cm'><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'>David, How many watts is the scrubber motor?<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'>Brian<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt'><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'><br><br>--- <a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a> wrote:<br><br>From: David Colombo via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>To: Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>><br>Subject: [PSUBS-MAILIST] Scrubber design and materials<br>Date: Sun, 27 Dec 2020 16:17:51 -0800<o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'>Hi Guys, just completed my scrubber for the VAST sub. Its capacity is right at 3lbs, based on my rice test. I see I can purchase soda sorb online but was wanting recommendations on where to purchase it or the draeger product. Since this is my first scrubber, I have no experience with the different products. <o:p></o:p></span></p><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'>David<o:p></o:p></span></p></div></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#26282A'>--0000000000001615f605b77b35d0--_______________________________________________ Personal_Submersibles mailing list <a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a> <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></div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>_______________________________________________<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></blockquote></div></div></div></div></div></div><div id=ydp2da2ec19yiv9297322996ydp91541ad3yqt68838><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>_______________________________________________<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></div></div></div></div></div></div><div id=ydp2da2ec19yqt09305><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica",sans-serif;color:#26282A'>_______________________________________________<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></div></div></div></div></div></body></html>