1) Air is compressed under Constant Entropy Process from 10 Psia, 3 ft³, 90°F to 50 Psia. Find the following: a) Final volume in ft³. b) Final temperature in °F. c) Work non flow in RTU
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- A vapor compression refrigeration cycle uses steam as the working fluid. Steamflows steadily with a mass ow rate of 0.5 kg/s. Saturated vapor at 2.0 o C (State 1) enters an uninsulated compressor and it is compressed to 0.35 bar (State 2). Heat transfer at the rate of 105 kJ/s occurs from the compressor to its surroundings and the heat transfer exactly balances the entropy generation rate so that s2 = s1. The boundary and surrounding temperature of the compressor is measured to be 26.67 o C. Steam exits as saturated liquid at 0.34 bar (State 3) from the condenser. Steam leaving the condenser is then throttled in an expansion valve (State 4) before entering a constant pressure evaporator to complete the thermodynamic cycle. (a) Calculate the power (kJ/s) for the compressor. (b) Determine the isentropic efficiency (%) of the compressor. (c) Calculate the entropy generation for the compressor. (d) Find the coefficient of performance of the refrigeration cycle. (e) Show the cycle on T-s…a constant pressure container (inside the piston-cylinder) with 250 kPa pressureat the beginning the mass of the saturated water vapor was 8 kg. Then the saturated steam in the cylinder compressed to 3/4 of its mass vy cooling.1) what's the amount of heat transferred to the environment.At the start of compression in an air standard Otto cycle with a compression ratio of 10, air is at 100 kPa and 313.15 K. A heat addition of 2800 kJ/kg is made. Calculate the thermal efficiency. For air, use k=1.4
- Solve the heat equation ut=cuxx on the domaion 0≤x≤2, t>0 subject to u(x,0)=x(x−2), u(0,t)=0,u(2,t)=0at 38 degrees celsius and 218 kpa gage, the specific weight of a certain gas was 15.0 n/m^3. determine the gas constant of this gas in j/(kg-kelvin).In undisturbed air stream, where the pressure is 14.7 psi and the temperature is 519R, the velocity is 600 ft/sec. What is the density if the velocity is 700 ft/sec.
- 0.05 kg of steam at 1.5 MPa is contained in a rigid vessel of volume of 0.0076 m^3. A. What is the temperature of the steam? B. If the vessel is cooled, at what temperature will the steam be just dry and saturated? C. Cooling is continued until the pressure in the vessel is 1.1 MPa, calculate the amount of vapor at this point. D. Calculate the amount of heat rejected between the initial and the final state. E. Draw the Ts diagram of the whole process.venturi meter with a throat diameter of 100 mm is installed in a 250 mm pipe. Air @ atmospheric pressure flows through it and exits at 90% of its original pressure. Computer the expansion factor of the gas.Derive the relation for adiabatic compressibility for ideal gas.
- Calculate the pressure difference between points A and B. The specific gravity of the oil is 0.85An electrical current flows through a long bar, generating thermal energy at a rate uniform volumetric of q = 2 × 105 W/m 3. The bar is concentric with a hollow ceramic cylinder, creating an air-filled space between the two. If the external surface temperature cannot exceed 40 °C, what is the minimum speed that the ambient air should be blown? the neighborhood meets at 25 °C and the emissivity of the ceramic is 0.8. If the bar has an emissivity of 0.2, what is the bar surface temperature?a cylinder of 0.9 m cube in volume contains air at 0°c and 39.24n/cm^2 absolute pressure. the air is compressed to 0.45 m^3.find(1) the pressure inside the cylinder as a isothermal process, (2)pressure and temperature assuming adiabatic process . take k=1.4 for air.