Natural gas, with the
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- Pressurized water (pin = 10 bar, Tin =110◦C) enters the bottom of an L = 12m long vertical tube of diameter D = 110 mm at a mass flow rate of m =1.5kg/s . The tube is located inside a combustion chamber, resulting in heat transfer to the tube. Superheated steam exits the top of the tube at pout = 7 bar, Tout = 600◦C. Determine the change in the rate at which the following quantities enter and exit the tube: (a) the combined thermal and flow work, (b) the mechanical energy, and (c) the total energy of the water. Also, (d) determine the heat transfer rate, Q˙. Hint: Relevant properties may be obtained from a thermodynamics text.arrow_forward1arrow_forwardThe values of Cp for the consu Ammonia in air is a toxic mixture when the ammonia is 0.45% by volume. Calculate how much leakage from an ammonia compressor can be tolerated per 1000m³ of space. The pressure is 1bas and the temperature is 15 °C. The molar mass of ammonia (NH3) is 17kg/kmol, and it may assume to act as a perfect gas in this case. and 70 °C. The vessel is A perfect insulated vessel having three compartments A, B and C of volume 1.3m³, 1.2 m³ and 1.0 m² respectively are separated from each other by thin membrane. Compartment A is filled with ritrogen having a pressure 3bar, at a temperature 25 °C, compartment B is filled with hydrogen having a pressure of 20bar at a temperature -40 °C and compartment C filled with carbon (IV) oxide at a temperature 175 °C and pressure 6bar. If the thin membrane are punctured and the three gases allowed to mix freely, calculate: (i) The final temperature of the mixture The final pressure of the mixture (iii) The change in entropy of the…arrow_forward
- 3. Assume the turbine as an incompressible flow machine. The average meridional speed is given as 150m/s. The flow coefficient is 0.5. Determine the blade speed that satisfies the above conditions.4. In a two-dimensional compressor cascade, inlet stagnation air pressure is 1.5 bar and inlet stagnation temperature is 330K. For an inlet Mach number of 0.75 and an inlet flow angle of 500, the exit flow angle is measured as 15.80. Determine the mass flow rate per unit frontal area, the exit Mach number and the static pressure ratio across the cascade. Assume the flow is isentropic.arrow_forwardCalculate the heat rejected by 1 Kg for a perfect gas has a molecular weight of 26 and a value of Υ=1.26 , RO =8.314 , When : a-The gas is contained in a rigid vessel at 3 bar and 315o C and cooled until the pressure drop to 1.5 bar. b-The gas enters pipeline at 280o C and flow steadily to the end of the pipe where the temperature is 250o C , neglected any change in the velocity of the gas.arrow_forwardQ 2. Air at 400°C and 1.7 bar flows through a horizontal 8.2-cm ID pipe at a velocity of 50.0 m/s. I. Calculate Ék (W)? Assuming ideal gas behavior and Mol.Wt (Air)=29 g/mol. I. If the air is cooled to 250°C at constant pressure, what is AER? III. Why would it be incorrect to say that the rate of transfer of heat to the gas must equal the rate of change of kinetic energy?arrow_forward
- 4.2. The ball catathermometer factor (F) is 620, time while the spirit column drops from 38 to 35°C in 100 seconds and the air temperature is 26°C. Determine the air movement speed for the industrial section with these parameters.arrow_forward2. A gas turbine stage has an initial absolute pressure of 350 kPa and a temperature of 565°C with negligible initial velocity. At the mean radius, 0.36 m, conditions are as follows: Nozzle exit flow angle Nozzle exit absolute pressure Stage reaction 68° 207 kPa 0.2 Determine the flow coefficient and stage loading factor at the mean radius and the reaction at the hub, radius 0.31 m, at the design speed of 8000 rev/min, given that stage is to have a free-vortex swirl at this speed. You may assume that losses are absent. Comment upon the results you obtain. Take Cp ‚ = 1.148 kJ/(kg ˚°C) and y = 1.33.arrow_forwardThe power output of an adiabatic steam turbine is 4 MW, and the inlet and outlet conditions of the steam are given below. Perform the following calculations: a) Calculate Ah, Ake, Ape (in kJ/kg) and the mass flow rate of the steam in kg/s. Inlet parameters Outlet parameters P1 = 2 MPa P2 = 10 kPa T1 = 400 °C V1 = 52 m/s 21 = 8 m X2 = 80% V2 = 182 m/s 22 = 4 m g = 9.81 m/s2 P V Steam turbine Wout i lisarrow_forward
- p48,#28 with illustration and explanationarrow_forwardTHERMODYNAMICS. Question I. 0.04 kg/s of an ideal gas (molecular weight 30, ratio of specific heats 1.5) flows through a duct with a cross sectional area of 10 cm?. The pressure and temperature are 100 kPa and 350 K. What is the velocity of this gas flow, in m/s?arrow_forwardPlease attached photo. I have theoretically solved this using only equations I can’t find a way to solve without the mass flow rate or area of the inlet as a given.arrow_forward
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