Chapter 6, Problem 6.39P

Argon gas flows through a well-insulated nozzle at steady state. The temperature and velocity at the inlet are 550°R and 150 ft/s, respectively. At the exit, the temperature is 480°R and the pressure is 40 lb/in?. The area of the exit is 0.0085 ft². Use the ideal gas model with k-1.67, and neglect potential energy effects. Determine the velocity at the exit, in ft/s, and the mass flow rate, in lb/s. Step 1 Your answer is correct Determine the velocity at the exit, in ft/s. V₂- 677.088 Hint Step 2 ft/s Determine the mass flow rate, in lb/s, through the nozzle. m = i lb/s Attempts: 2 of 4 used

ygotins lo 6.69) By injecting liquid water into superheated steam. the desuperheater shown in Fig. P6.69 has a saturated vapor stream at its exit. Steady-state operating data are provided in the accompanying table. Stray heat transfer and all kinetic neand potential energy effects are negligible. (a) Locate states to 1, 2, and 3 on a sketch of the T-s diagram. (b) Determine the rate of entropy production within the de-superheater, K.Modelthe in kW/K. ideal as State p(MPa) T°C) ) v × 10³(m³/kg) u(kJ/kg) h(kJ/kg) s(kJ/kg · K) 1 38 1.0065 X 10-3 166.5 168.3 0.5658 1B 0.1308 320 sat. vap. Y2807.9 3069.5 6.8452 3 1.5 1.159 2519.7 2693.6 7.2233 Desuperheater bol Liquid बेे कत 60°C. Det heet ni water 3. Saturated fos vapor P6.4recom O lo lguons 2 Superheated- vapor honor m2 = 0.03 kg/s motava bogisins odt 1ol,nW ni

How to solve this question please

6.5

Steam enters a turbine operating at steady state at 850oF and 450 lbf/in2 and leaves as a saturated vapor at 1.2 lbf/in2. The turbine develops 12,000 hp, and heat transfer from the turbine to the surroundings occurs at a rate of 2 x 106 Btu/h. Neglect kinetic and potential energy changes from inlet to exit. Determine the exit temperature, in oF, and the volumetric flow rate of the steam at the inlet, in ft3/s.

T-4

Equations of State for a gas;P.v = 0.004 (T + 273)U=U0+1,2 Tgiven in the form. In equations P: bar, v: m3/kg, U: kj / kg, t: C. Becomingthe initial volume of a piston cylinder system filled with gas,whose equations are given, is 0, 02m3, its temperature is 90 C, and its pressure is 4 bar. When the gas expands to a lower pressure,the work that the gas does is 3 kJ, and the heat that passes into the environment is 1.9 kJ. What is the final temperature of the gas?

Consider you have an insulated mixing chamber at steady state. This control volume receives two liquid streams at T1 and T2 (with mass flow rates of m1,and m2) and delivers a single stream as an output at T3 and m3.Use the incompressible substance model (with constant specific heat c), neglect the kinetic and potential energy effects, and obtain an expression for T3 in terms of T2, T1 and m1/m3.

6.14