Air flows steadily at the rate of 30 kg/min through an air compressor entering at a velocity of 7 m/ pressure of 100 kPa and a specific volume of 0.95 m°/kg. The internal energy of the air leaving compressor is 90 kJ/kg greater than that of the air entering. The air leaves at a velocity of 5 m/s, a pressure of 700 kPa and a specific volume of 0.19 m°/kg. Cooling water in the compressor jackets

Air flows steadily at the rate of 30 kg/min through an air compressor entering at a velocity of 7 m/ pressure of 100 kPa and a specific volume of 0.95 m°/kg. The internal energy of the air leaving compressor is 90 kJ/kg greater than that of the air entering. The air leaves at a velocity of 5 m/s, a pressure of 700 kPa and a specific volume of 0.19 m°/kg. Cooling water in the compressor jackets

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

A fluid enters a steady-flow system at a rate of 2.5 kg/s with an initial pressure of 0.70 MPa, density of 3.2 kg/m3, velocity of 30 m/s and internal energy of 1860 kJ/kg and leaves with a pressure of 0.14 MPa, density of 0.8 kg/m3, velocity of 150 m/s and internal energy of 1810 kJ/kg. During passage through the open system, each kg rejects 25 kJ of heat. Find the shaft work involve in horsepower.1 hp = 746 WAns. 194.2 hp
1. An air compressor receives 272 kg/min of air at 99.29 kPa and a specific volume of 0.026 m3/kg. The air flows steady through the compressor and is discharged at 689.5 kPa and 0.0051 m³/kg. The initial internal energy of the air is 1594 J/kg; at discharge, the internal energy is 6241 J/kg. The cooling water circulated around the cylinder carries away 4383 J/kg of air. The change in kinetic energy is 896 J/kg increase. Compute the work.
A mixing vessel initially contains 4,485.43 lb of liquid fluid. The vessel is fitted with two inlet pipes, one delivering hot fluid at a mass flow rate of 0.635 lb/sec and the other delivering cold fluid at a mass flow rate of 0.836 lb/sec. Fluid exits through a single pipe at a mass flowrate of 1.144 lb/sec. Calculate the amount of fluid, in lb, in the tank after 44 minutes.
A turbine, operating under steady-flow conditions, receives X1 kg of steam per hour (For X1 refer Table. 1). The steam enters the turbine at a velocity of 3000 m/min, an elevation of 5 m and a specific enthalpy of 2787 kJ/kg. It leaves the turbine at a velocity of 6000 m/min, an elevation of 1 m and a specific enthalpy of 2259 kJ/kg. Heat losses from the turbine to the surroundings amount to 16736 kJ/h. Determine the power output of the turbine.
A mixing vessel initially contains 3,907.66 lb of liquid fluid. The vessel is fitted with two inlet pipes, one delivering hot fluid at a mass flow rate of 0.755 lb/sec and the other delivering cold fluid at a mass flow rate of 0.899 lb/sec. Fluid exits through a single pipe at a mass flow rate of 1.197 lb/sec. Calculate the amount of fluid, in lb, in the tank after 13 minutes.
6. Air whose density is 0.078 Ib/ft^3 enters the duct of an air-conditioning system at a volume flow rate of 450 CFM. If the diameter of the duct is 10 in, determine the mass flow rate of air in Ib/min.
NINEVEH UNIVERSITY THERMODYNAMICS Nozzles and Diffusers Ex,) Air at 10°C and 80 Kpa (abs) enters the diffuser of a jet engine steadily with a velocity of 200 m/s. The inlet area of the diffuser is 0.4 m2. The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. Determine the mass flow rate of the air and the temperature of the air leaving the diffuser.
A mixing vessel initially contains 3,766.6 lb of liquid fluid. The vessel is fitted with two inlet pipes, one delivering hot fluid at a mass flow rate of 0.916 lb/sec. Fluid exits through a single pipe at a mass flow rate of 1.373 lb/sec. Calculate the amount of fluid, in lb, in the tank after 41 mins.
3. A desktop computer is to be cooled by a fan whose flow rate is 0.34 m/min. Determine the mass flow rate of air, in kg/s, through the fan at an elevation of 3400 m where the air density is 0.7 kg/m³. Also, if the average velocity of air is not to exceed 110 m/min, find the diameter of the casing of the fan, in mm.
A steady state, steady flow compressor draws in 240 liters per second of air whose density is 1.26 kgm/m3 and discharges it with a density of 4.9 kgm/m3 . At suction P1= 104 kPaa; at discharge, P2 = 551 kPaa. The increase of specific internal energy is 78.5 kJ/kgm and the heat from the air by cooling is 30 kJ/kgm. Neglecting the change in potential and kinetic energies, determine the work in kJ/min
3. Air enters a gas turbine system with a velocity of 105 m/s and has a specific volume of 0.8mkg. The inlet area of the gas turbine system is 0.05m. At exit the air has a velocity of 135m/s and has a specific volume of L.5 m/kg. In its passage through the rurbine system the specific enthalpy of the air is reduced by 145kj/kg and the air also has heat loss of 27kj kg. Determine 7. 1. The mass flow rate of the air through the turbine system 2 The exit area of the turbine 3. The power developed by the turbine systenm
5. Air enters a compressor at a rate of 0.5 Kgs¹ with a velocity of 6.4 ms', specific volume 0.85 m³Kg¹ and a pressure of 1 bar. It leaves the compressor at a pressure of 6.9 bar with a specific volume of 0.16 m³Kg¹ and a velocity of 4.7 ms¹. The internal energy of the air at exit is greater than that at entry by 85 KJKg'. The compressor is fitted with a cooling system which removes heat at a rate of 60 KJs¹. Calculate the power required to drive the compressor and the cross- sectional areas of the inlet and outlet pipes.