Question

2.(40 pts.) A mixing chamber is used to heat liquid water to a saturated vapor by adding superheated steam. The liquid water enters through Line 1 at 1 MPa, a temperature of 100 C and a mass flow rate of 2 kg/s. The superheated steam enters through Line 2 at 1 MPa and 400°C. The combined stream exits through Line 3 as a saturated vapor at 1 MPa. The chamber also receives 3 MW of heat transferred from an external source at T.-227 C 52. 2 (a) Write the Conservation of Mass in this box. Indicate which terms do not apply and w (b) Write the final form of the Conservation of Mass equation applicable to this problem, and calculate m (c) Write the 1* Law of Thermodynamics in this box. Indicate which terms do not apply and hr (d) Write the final form of the 1s* Law of Thermodynamics equation applicable to this problem (e) Write the 2nd Law of Thermodynamics in this box. Indicate which terms do not apply and wh () write the final form of the 2nd Law' of Thermodynamics equation applicable to this problem: (g) Obtain the needed properties and write them in this box with their specific subscript of 1.2 or 3): W/k) (h) Calculate the rate of entropy generation for this mixing chamber Ce

Answer 1

S-3maat, 222℃ ㄘ 2 ar 3, Cenbined Steam exits a 1 a, Soluobal S teom

2 ·ノ a20 ニ> 2xy39.ay +mbx32CY.Sナ3000-m3X 229.y

S,イー·イ Ty 孔 心1. 3 2 or ere