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Two phase nh3 flow pressure drop through valves

Two phase nh3 flow pressure drop through valves

Two phase nh3 flow pressure drop through valves

(OP)
Who of you is a little bit familiar with following problem:

0,09 kg/s ammonia gas flow at 0,408 bara pressure through 3 valves in series, each kvs=246m3/h (approx.cv 211)

Density at entrance pressure is 0,38 kg/m3.
Which value will have friction pressure loss? (I calculated roughly 10 mbar and I think I am right.)

Now additionally 0,36 kg/s ammonia liquid flows through the same system. Density of liquid ammonia is 700 kg/m3.

What about pressure loss now?
I calculate an enormous increasement of pressure drop and must convince other people about this (If this is really the case)

kin. visc. liquid     0,5645 cP
kin. visc. gaseous 0,0075 cP

Any advice welcome.

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