Chapter 7, Problem 7.28P

Air at the rate of 14kg/sec expands from 3bar, 1500C, 0.1m3 to 1 bar reversibly and adiabatically. Find the exit temperature and power developed. If the heat is given to the system 1200J. Find out the change in internal energy

5- Nitrogen gas flows into a convergent nozzle at 200 kPa, 400 K and very low velocity. It flows out of the nozzle at 100 kPa, 330 K. If the nozzle is insulated, find the exit velocity. a- 222 m/s b- 382 m/s c- 512 m/s d- 640 m/s AU-0 means that the process is isothermal?

This is entropy generation in irreversible process A volume flow of air at 500K, 2000 kPa passes in a long pipe through a temperature reservoir that is kept at a temperature of 1000℃. The air exits at 1000 K and 1.8 MPa. Consider air as ideal gas with variable specific heats, R = 0.287 kJ/kg-K a) Draw a sketch of the system, and draw the process into a T-s-diagram with respect to isobaric lines. b) Determine the heating rate per unit mass of air passing through. c) Determine the entropy generation rate per unit mass flowing through.

Helium at 660 K expands in a turbine to 369 K during which 84 kJ/kg of heat was lost to the surroundings which are at 27 oC. The pressure across the turbine was 6.0, What is the magnitude of entropy generation (kJ/kg.K)?

Question 1. Refrigerant-I34a enters a compressor (as a saturated vapor) at 14°C. It leaves at 1600 kPa, enthalpy of 265 KJ/kg. Velacity is 5s m/s. Mass flow rate is 4.6kg/s. Use property table. What is the qua lity of R-134a at the exit in percentage ? O Rate of work done in KW?

Water Vapor pressure 8 MPa and 350 in an adiabatic turbineIt enters at a temperature of oC and at a pressure of 750 kPacomes out. Reversible The amount of work done by the unit mass of steam for the processcalculate.

Solve it correctly please. I will rate. Answer should be match

K) that undergo an K-K 13. There are 1.5 Kgof a gas where K = 1.3 and R = 0.38 tsochoric process from pi = 0.552 MPa, t, = 58.5°C top2 = 1.66 MPa. During the process, there added 100 KJ of heat. Compute the heat transferred, change of internal energy and the change of entropy. %3D

Air enters an insulated compressor at ambient conditions, 100 kPa, 20 oC at the rate of 0.2 kg/s and exits at 500 K. The isentropic efficiency of the compressor is 70%. What is the exit pressure? How much power is required to drive the compressor? Assume specific heats at room temperatures.