A gas with cp = 0.950 kJ/kg-K enters an insulated nozzle at 30oC and a velocity...

A gas with cp = 0.950 kJ/kg-K enters an insulated nozzle at 30^oC and a velocity of 8 m/s. The gas exits at a velocity of 100 m/s. Assuming constant specific heats and ideal gas behavior, what is the exit temperature of the gas?

Expert Solution

samet mamat answered 2 years ago

Water flowing at a rate of 0.667 kg/s (Cp = 4.192 kJ/kg. K) enters a counter...

Water flowing at a rate of 0.667 kg/s (Cp = 4.192 kJ/kg. K) enters a counter current heat exchanger at 318 K and is heated by an oil stream entering at 393 K at a rate of 2.85 kg/s (Cp=1.89 kJ/kg. K). The overall U=290 W/m2. K and the area A=20 m2. Calculate the heat transfer rate and the exit water temperature.

Air (cp = 1.0 kJ/kgK) enters an air conditioning system at 40C with a mass flow...

Air (cp = 1.0 kJ/kgK) enters an air conditioning system at 40C with a mass flow rate of 1.5 kg/s. The air is cooled by exchanging heat with a stream of R-134a refrigerant that enters the heat exchanger at -8C and 20% quality, and exits with 100% quality. If 25 kW of heat is transferred out of the air, determine: (40 pts) i) Mass flowrate of R-134a (kg/hr) ii) Exit temperature of air (C) iii) Exit pressure of R-134a (kPa)

Air (Cp = 1.005 kJ/kg · K) is to be preheated by hot exhaust gases in...

Air (Cp = 1.005 kJ/kg · K) is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. Air enters the heat exchanger at 95 kPa and 20◦C at a rate of 0.90 kg/s. The combustion gases (Cp = 1.1 kJ/kg · K) enter at a rate of 1.1 kg/s and 150◦C. The product of the overall heat transfer coefficient and the heat transfer surface area is U A = 1200 W/K. Assuming...

Refrigerant 134a enters a well-insulated nozzle at 14 bar, 60°C, with a velocity of 37 m/s...

Refrigerant 134a enters a well-insulated nozzle at 14 bar, 60°C, with a velocity of 37 m/s and exits at 1.2 bar with a velocity of 460 m/s. For steady-state operation, and neglecting potential energy effects, determine the exit temperature, in °C.

Water ( ρ= 1000 kg/m3; Cp= 4.2 kJ/kg.K; k= 0.58 W/m.K ) at 1,537 kg/hr and...

Water ( ρ= 1000 kg/m3; Cp= 4.2 kJ/kg.K; k= 0.58 W/m.K ) at 1,537 kg/hr and 26oC enters a 10-mm-diameter smooth tube whose wall temperature is maintained at 79oC. If the water's Nusselt number (Nu) = 375, and the tube length is 7.6, calculate the water outlet temperature,in oC.

1- Steam enters a nozzle at 500 °C and 1000 kPa with a velocity of 15...

1- Steam enters a nozzle at 500 °C and 1000 kPa with a velocity of 15 m/s. It leaves the nozzle at 200 °C and 300 kPa while losing heat at a rate of 30 kW. For an inlet area of 700 cm2, determine the velocity of the steam at the nozzle exit.?

Consider a turbine; working substance is air. cp=1.0 kJ/kgK , k=1.4 v1=0.03 , v2=0.08 m3/kg , ...

Consider a turbine; working substance is air. cp=1.0 kJ/kgK , k=1.4 v1=0.03 , v2=0.08 m3/kg , p1=2.5 bar; state 1 is enterance, state 2 is the exit of the turbine. The turbine is not ideal (isentropic); the air goes through a state change according to pv^n=constant , n=1.6 Compute the ideal and actual specific works and turbine efficiency. pvn=constant , n=1.6

A stainless steel ball (? = 8055 kg/m3 , CP = 480 J/Kg? K ) of...

A stainless steel ball (? = 8055 kg/m3 , CP = 480 J/Kg? K ) of diameter D = 15cm is removed from the oven at a uniform temperature of 350 Degrees C. The ball is then subjected to the flow of air at 1 atm pressure and 30 degrees C with a velocity of 6m/s. The surface temperature of the ball eventually drops to 250 degrees 250 degrees C. Determine the average convection heat transfer coefficient during this cooling...

Air enters a nozzle steadily at 280 kPa and 77°C with a velocity of 70 m/s...

Air enters a nozzle steadily at 280 kPa and 77°C with a velocity of 70 m/s and exits at 85 kPa and 320 m/s. The heat losses from the nozzle to the surrounding medium at 20°C are estimated to be 3.2 kJ/kg. The table for the ideal-gas properties of air is given below. Determine the exit temperature. (Round the final answer to one decimal). The exit temperature is ______K Determine the total entropy change for this process. (Round the final...

choose the best answer: A- An ideal gas enters an adiabatic nozzle at 10 m/s and...

choose the best answer: A- An ideal gas enters an adiabatic nozzle at 10 m/s and exits at 300 m/s. If the incoming specific enthalpy of the gas is 2,111 kJ/kg, what is the exiting specific enthalpy of the gas in kJ/kg? Choices: 1: 2021.1 Kj/Kg , 2: 2200.9 kj/Kg , 3: 92011 Kj/Kg , -2021.2 kj/Kg. B- A material with a specific heat, Cp, of 5 kJ/kg-K passes through an insulated turbine at 4 kg/s. The incoming temperature of...

Question