ME 3333 Chapter : Homework 7 Solutions
Document Summary
Superheated vapor ammonia enters an insulated nozzle at 20 c, 800 kpa, shown in fig. P6. 25, with a low velocity and at the steady rate of 0. 01 kg/s. The ammonia exits at 300 kpa with a velocity of 450 m/s. Determine the temperature (or quality, if saturated) and the exit area of the nozzle. C. v. nozzle, steady state, 1 inlet and 1 exit flow, insulated so no heat transfer. /2, q = 0, vi = 0 hi = 1464. 9 = he + 4502/(2 1000) he = 1363. 6 kj/kg. Pe = 300 kpa sat. state at 9. 2 c : he = 1363. 6 = 138. 0 + xe 1293. 8, => xe = 0. 947, ve = 0. 001536 + xe 0. 4064 = 0. 3864 m3/kg. Ae = m eve/v e = 0. 01 0. 3864 / 450 = 8. 56 10-6 m2. P6. 28, has air entering at 100 kpa, 300 k, with a velocity of 200 m/s. The inlet cross-sectional area of the diffuser is 100 mm2.
