TAK 2000 Mass Flow Conductors

The FLQ option is used to model the flow conductor that represents the the boiloff gas. This option allows the user to define a single mass-flow conductor whose value is a function of a heat balance on a boundary node. The basic format is as follows; FLQ G#, N1, N2, A#, FAC, QB $ (basic format) where;

G# conductor number, (Integer)
N1 node one ("-" if flow leaves this node), (Integer)
N2 node two ("-" if flow leaves this node), (Integer)
A# doublet array number containing the specific heat vs temperature , (Integer)
FAC multiplying factor, (Floating Point)
QB boundary node on which the heat balance is performed, (Integer)

     FLQ   3001, -800,  261, 500, 1./23000., 998 $

In this example the helium vapor is leaving node 800 at the temperature of node 800. The conductor will connect the cryo tank node to the chopper motor housing (node 261). The array contains the specific heat of the vent gas as a function of temperature. The multiplying factor "FAC", is the inverse of the heat of vaporation of helium. Each iteration the the array is interpolated to get specific heat, it is multiplied by FAC, and then multiplied by the net heat balance of the specified node.

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