23 m³/hr of air at 600 kPa, 330 K enters a well-insulated, horizontal pipe having a diameter of 1.2 cm and exits at 120 kPa. Assume steady state and use the ideal gas model for the air. Also assume constant specific heat, c = 1.007 kJ/kg-K for air at 330K. Determine the mass flow rate, in kg/s, and the exit velocity, in m/s. Step 1 Determine the mass flow rate, in kg/s. m₁ = 0.04047 ✓kg/s Step 2 Determine the exit velocity, in m/s. V₂ = 178.315 x m/s

Refrigerant 134a enters a horizontal pipe operating at steady state at 40°C, 300 kPa, and a velocity of 25 m/s. At the exit, the temperature is 50°C and the pressure is 240 kPa. The pipe diameter is 0.055 m. Determine: (a) the mass flow rate of the refrigerant, in kg/s, (b) the velocity at the exit, in m/s, and (c) the rate of heat transfer between the pipe and its surroundings, in kW.

Steam enters a turbine operating at steady state at 1.5 MPa and 418.4 °C, with a velocity of 79 m/s. Saturated vapour exits at 0.2 MPa and a velocity of 40 m/s. The elevation of the inlet is 2.8 m higher than the exit. The mass flow rate is 11.7 kg/s and the power developed is 5.5 MW. a) Using the property tables calculate the specific volume of the steam at the inlet m/kg b) Compute the area of the inlet m2 c) Using the property tables calculate the specific enthalpy of the steam entering the turbine kJ/kg

If steam flows through a nozzle at steady-state, entering the nozzle with a pressure of 0.5 MPa and a temperature of 673 K, where H = 3272 kJ/kg, and exiting at 0.1 MPa and 623 K, where H = 3176 kJ/kg, what is its exiting velocity (in m/s)? Assume that the heat loss is 10% of the change in kinetic energy.