Question

A control volume operating at steady state has one inlet and two exits. Steam enters inlet 1 and sat. vapor at 2 bar exits exit 2 and sat. liquid at 2 bars exits exit 3

Using the data given, determine

[a] the mass flow rate at the inlet state 1, in kg/sec,

[b] the mass flow rate at exit state 2, in kg/sec, and

[c] area required at exit 2 to ensure velocity is same as velocity at inlet 1

[d] If not work is done on or by the control volume, determine the heat transfer Q (ignore kinetic and potential energy effects in the energy balance), whether into or out of

Given:

Inlet 1: A1 = 0.6 m^2, V1 = 50 m/s, p1 = 10 bars, T1 = 400 C

Exit 2: mass flow rate2 =? A2 = ?

Exit 3: mass flow rate3 = 50 kg/s, A3 = 0.018 m^2

Answer 1