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276 Chapter 6
Vent
-Vortex Breaker
Figure 6.3 An accumulator.
Table 6.5 Summary of Equations for Sizing Accumulators
Subscripts: L = liquid — HV = vessel head
V = 2V L 't s (6.5.1)
ts = 5 to 10 min (6.5.2)
2
7tD L
V = - (6.5.3)
L/D = 2.5 to 6 (6.5.4)
f m = 0.1309 — for a 2:1 ellipsoidal head, or (6.5.5)
fnv = 0.0778 — for a torispherical head
Unknowns
ts, D, L, P, V, fnv
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