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Hi Amrit,<br>
<br>
The Hall B dewar is filled automatically when level drops to 500
gallons. The LN2 trucks arrive daily to fill all the accelerator
tanks, we are simply tagging along for the ride.<br>
<br>
George <br>
<br>
<div class="moz-cite-prefix">On 11/30/2017 3:48 PM, Amrit
Yegneswaran wrote:<br>
</div>
<blockquote type="cite"
cite="mid:1238353204.1800463.1512074917736.JavaMail.zimbra@jlab.org">
<div style="font-family: tahoma,new york,times,serif; font-size:
14pt; color: #009900">
<div>george,<br data-mce-bogus="1">
</div>
<div>it appears that for the forward carriage, we need 60,000
L/day of N2 (for LTCC and RICH [EC not included]).<br
data-mce-bogus="1">
</div>
<div>the pipe on the forward carriage is 500 ft long and 0.5" in
diameter.<br data-mce-bogus="1">
</div>
<div>at the input to the valve panel the pressure is 35 psi.<br
data-mce-bogus="1">
</div>
<div>the exit pressure is ~15 psi, i assume.<br
data-mce-bogus="1">
</div>
<div>the dewar is 1500 gallons ~5678 liquid liters ~ 4,000,000
gas liters.<br data-mce-bogus="1">
</div>
<div>so, i reckon the dewar contains ~66 days worth of N2.</div>
<div>how frequent is the N2 refills?<br data-mce-bogus="1">
</div>
<div>i think we should top up the dewar when it is half full.<br
data-mce-bogus="1">
</div>
<div>amrit<br data-mce-bogus="1">
</div>
<div><br data-mce-bogus="1">
</div>
</div>
<br>
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<br>
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<pre class="moz-signature" cols="72">--
George Jacobs
Jefferson Lab (TJNAF)
STE 12
12000 Jefferson Ave.
Newport News, VA 23606
(office) 757-269-7115
(cell) 757-876-0480
(email) <a class="moz-txt-link-abbreviated" href="mailto:jacobsg@jlab.org">jacobsg@jlab.org</a>
(website) <a class="moz-txt-link-freetext" href="https://userweb.jlab.org/~jacobsg">https://userweb.jlab.org/~jacobsg</a></pre>
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