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topmargin=0 leftmargin=0 marginwidth="0" marginheight="0"><font
face="Courier New" size=2>Hi Sean, <BR><BR>in praxis we use 0,25
l/min or (0,25 x 60=) 15 L/h O2 per hour and person. <BR></font>15 l/h x
72 h = 1080 Liters. Divided by a pressure in the bottle of 200
atm. is a 5
Liter bottle per person for emergency storage only. <BR><BR>This is
close to the
GL figure for resting person. <BR><BR>But if you are in a emergency
72 hour
situation one person will rest and all other sleep..<BR>So on more than
one
person sub the figures over 72 hours will be lower. <BR><BR>By the way
-if I
am in Sgt.Peppers the flowmeter is some what by 0,2 L/h..
<BR><BR>Emile can
give you actual flowmeter figures for a three person sub. <BR><BR>vbr
Carsten <FONT size=2> - "If you are not sure - double it.."
(unkown
submarine engineer)</FONT> <BR>
<BR>
<BR>"Sean T. Stevenson via Personal_Submersibles"
<personal_submersibles@psubs.org> schrieb:
<blockquote style="PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT:
#000000 2px solid; PADDING-RIGHT: 0px; MARGIN-RIGHT: 0px">
<div class="moz-cite-prefix">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:<br>
</div>
<blockquote
cite=mid:2tj9lxn8f38awyavaxvv7unp.1398206846763@email.android.com
type="cite">
<div>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. </div>
<div>I am showing</div>
<div>*80 cubic feet of O2 per person</div>
<div>*23 lbs sodasorb per person</div>
<div><br>
</div>
<div>Is this right?</div>
<div>Thanks,</div>
<div>Scott Waters</div>
</blockquote>
</blockquote>
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