Chapter 7, Problem 7.57P

Strictly don't use chatgpt Only handwritten (Quick) 3. Steam enters a diffuser operating at steady state with a pressure of 3 bar, a temperature of 200 °C, and a velocity of 100 m/s. Steam exits the diffuser as a saturated vapor, with a velocity of 10 m/s. Heat transfer occurs from the steam to its surroundings at a rate of 200 kJ/kg of steam flowing. Neglecting potential energy effects, determine the exit pressure, in bar. (Note: 1 kJ/kg-1000 m²/s²) (1) (2) TABLE A-3 Pressure Conversions: Properties of Saturated Water (Liquid-Vapor): Pressure Table 1 bar 0.1 MPa = 10 kPa Specific Volume m/kg Internal Energy kj/kg Enthalpy kj/kg Entropy kj/kg K Sat. Press. bar Temp. Liquid Sat. Vapor Sat. Liquid Sat. Vapor Sat. "C By x 10' Liquid Evap. hy Sat. Vapor he Sat. Liquid Sat. Vapor Press. 51 bar 0.04 28.96 1.0040 34.800 0.06 36.16 1.0064 23.739 0.08 41.51 1.0084 18.103 0.10 45.81 1.0102 0.20 60.06 1.0172 14.674 7.649 0.30 69.10 1.0223 5.229 0.40 75.87 0.50 0.60 85.94 0.70 89.95 1.0265 3.993…

X Your answer is incorrect. A rigid tank whose volume is 4 m³, initially containing air at 1 bar, 295 K, is connected by a valve to a large vessel holding air at 6 bar, 295 K. The valve is opened only as long as required to fill the tank with air to a pressure of 6 bar and a temperature of 350 K. Assuming the ideal gas model for the air, determine the heat transfer between the tank contents and the surroundings, in kJ. Qev = i 88.08 eTextbook and Media Hint Save for Later kJ Attempts: unlimited 4 Submit Answer

Item 9 An open system with only one inlet and one exit operates at steady state. Mass enters the system at a flow rate of 8 kg/s with the following properties: h = 3245 kJ/kg, s = 8.0514 kJ/kg - K, and V = 18 m/s. At the exit the properties are as follows: h = 2139 kJ/kg, s = 8.089 kJ/kg · K, and V = 29 m/s. The device produces 8799 kW shaft work while rejecting some heat to the atmosphere at 30 °C. Part A Do a mass analysis to determine the mass flow rate at the exit. Express your answer to three significant figures. ΑΣφ |vec ? Submit Request Answer Part B Do an energy analysis to determine the rate of heat transfer (include sign). Express your answer to three significant figures and include the appropriate units. ? Value Units Submit Request Answer Part C Do an entropy analysis to evaluate the rate of entropy generation in the system's universe. Express your answer to three significant figures. ΑΣφ vec ? kW K

14. thermodynamics

T-3

Steam with a quality of 0.71, pressure of 1.5 bar, and flow rate of 10 kg/s enters a steam separator operating at steady state. Saturated vapor at 1.5 bar exits the separator at state 2 at a rate of 6.9 kg/s while saturated liquid at 1.5 bar exits the separator at state 3.Neglecting kinetic and potential energy effects, determine the rate of heat transfer, in kW, for the steam separator.

Refrigerant 134a enters an insulated diffuser as a saturated vapor at 80°F with a velocity of 1400 ft/s. The inlet area is 1.4 in². At the exit, the pressure is 400 lbf/in² and the velocity is negligible. The diffuser operates at steady state and potential energy effects can be neglected. Determine the mass flow rate, in lb/s, and the exit temperature, in °F. Step 1 Determine the mass flow rate, in lb/s. m = i lb/s.

= 95°F and m3 = 1.5 lb/s. Refrigerant 134a The figure belows shows three components of an air-conditioning system, where T3 flows through a throttling valve and a heat exchanger while air flows through a fan and the same heat exchanger. Data for steady- state operation are given on the figure. There is no significant heat transfer between any of the components and the surroundings. Kinetic and potential energy effects are negligible. Air Tj = 535°R C,= 0.240 Btu/I6•°R Saturated liquid R-134a T3, ṁ3 Fan Wey = -0.2 hp Throttling valve 4 Saturated vapor P5=P4 P4 = 60 lbf/in.2 T = 528°R -Heat exchanger Modeling air as an ideal gas with constant c, = 0.240 Btu/lb· °R, determine the mass flow rate of the air, in Ib/s. i Ib/s

Steam enters a heat exchanger operating at steady state at 5 bar with a specific enthalpy of 2298 kJ/kg and exits at the same pressure as a saturated liquid. The steam mass flow rate is 1.29 kg/min. A separate stream of air with a mass flow rate of 48.3 kg/min enters at 38.4 °C and exits at 76.7 °C. The ideal gas model with c, = 1.005 kJ/kg.K can be assumed for air. Kinetic and potential energy effects are negligible. a) Determine the quality of the entering steam: b) Determine the rate of heat transfer between the heat exchanger and its surroundings: kW.