Question

i need EES code for 5-170, not manual solving

5-169 Steam enters a turbine steadily at 7 MPa and 600°C with a velocity of 60 m/s and leaves at 25 kPa with a quality of 95 percent. A heat loss of 20 kJ/kg occurs during the process. The inlet area of the turbine is 150 cm?, and the exit area is 1400 cm. Determine (0) the mass flow rate of the steam, (b) the exit velocity, and (c) the power output. 5-170 S Reconsider Prob. 5-169. Using EES (or other software, investigate the effects of turbine exit area and turbine exit pressure on the exit velocity and power output of the turbine. Let the exit pressure vary from 10 to 50 kPa (with the same quality), and the exit area to vary from 1000 to 3000 cm. Plot the exit velocity and the power outlet against the exit pressure for the exit areas of 1000. 2000, and 3000 em', and discuss the results.

Answer 1

nalysis :- the results The broblem w salved using ees, and are tabulated and blotted below. a Fluid $ = 'steam _ IAPWS' A [1] = 150 [cm^2] T[1] = 600[C] P[1] = 7000[kPa] Vell 1] = 60 [msec] A [2] = 1400 [cm^2] P [2] - 25[kPa] q_out= 20 [k J/kg] m_dot = A[ 11* Vell 1]/v[1]* Convertcm^2, mîz) v[1]= volumel Fluid $, T= T[1], P=P[1]"Specific Volume of steam at state1" Vel [2]= m_cot*v[2]/(A[2]*convert(cm^2, m^2)) V[2]= volume (Fluid $, X=0.95, P=P[2])"specific Volume of steam at state 2" T127– temperaturel Fluid$, P=P[2], V=V[2]) "[c]" not required, but good to know" "Tconservation of Energy for steady - Flow." " Ein dot - Eout_dot – Delta E _ dot For steady-flow, DeltaE_dot=0" DELTAE_ dot = 0 " For the turbine as the contoul volume, neglecting of each Flow systemi' I E_dot_in= E-dot-out

b[1] = enthalby (Fluid$, T= T[1], P= P[1]) E_dot_in= m_dot* (1 [1] + Vel[1]^2/2* convert(m2/ 52, kJ/kg)) h[2]= enthalby (Fluid$, X=0.95, P=P[2]) E_dot_out= m_dot *(1 [2]+ Vel [2]^2/2*convert (m^2/52,kJ/kg))+ m_dot*q-out +W_dot_out Power=W_dot_out Q_dot_out=m_dot *q-out [kPa] 10 14,44 18.89 23.33 27.78 32-22 36.67 41:11 45.56 50 | Power [KWI - 22158 -1895 6071 9998 12212 13573 14464 15075 15507 15821 Vets [me] 2253 1595 1239 1017 863.2 7511 665.4 597.8 543 497.7 Table Values are for A[2]= 1000 [cm2]

18000 16ooot I A2 z 3 woulm? La -looo com Ag=2000&m2. 14000 12000 [mx] in mod Poso 6ooot 30 25 35 40 45. 10 IS 20 P[2] [ kpa. ] 2200 2000 1800 1600 1400 1200 [81] [2] PA LA2 #loooom2 Az z 2000m O you A₂=3000 km2 20 25 30 IS P [2] [kPa] 35 40 45 so