Carbon dioxide gas is compressed at steady state from a pressure of 18 lb/in² and a temperature of 32°F to a pressure of 50 lb/in² and a temperature of 120°F. The gas enters the compressor with a velocity of 30 ft/s and exits with a velocity of 80 ft/s. The mass flow rate is 4000 lb/hr. The magnitude of the heat transfer rate from the compressor to its surroundings is 5% of the compressor power input. Use the ideal gas model with cp = 0.21 Btu/lb-ºR and neglect potential energy effects. Determine the flow area at the inlet, in ft2, and the power required by the compressor to work, in horsepower. Step 1 Determine the flow area at the inlet, in ft². D

Carbon dioxide gas is compressed at steady state from a pressure of 18 lb/in² and a temperature of 32°F to a pressure of 50 lb/in² and a temperature of 120°F. The gas enters the compressor with a velocity of 30 ft/s and exits with a velocity of 80 ft/s. The mass flow rate is 4000 lb/hr. The magnitude of the heat transfer rate from the compressor to its surroundings is 5% of the compressor power input. Use the ideal gas model with cp = 0.21 Btu/lb-ºR and neglect potential energy effects. Determine the flow area at the inlet, in ft2, and the power required by the compressor to work, in horsepower. Step 1 Determine the flow area at the inlet, in ft². D

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

55 kmol per hour of air is compressed from P1 = 1 bar to P2 = 6.1 bar in a steady flow compressor. Delivered mechanical power is 98.9 kW. Temperatures and velocities are: T1 = 301K T2 = 520 K, u1 = 10.8 m/s and u2 = 3.8 m/s. Estimate the rate of heat transfer from the compressor in kW, 3 decimal values. Assume that Cp = 7/2R and that enthalpy is independent of pressure.
Carbon dioxide gas is compressed at steady state from a pressure of 22 Ib;/in? and a temperature of 32°F to a pressure of 50 lb;/in? and a temperature of 110°F. The gas enters the compressor with a velocity of 30 ft/s and exits with a velocity of 80 ft/s. The mass flow rate is 3500 lb/hr. The magnitude of the heat transfer rate from the compressor to its surroundings is 5% of the compressor power input. Use the ideal gas model with cp = 0.21 Btu/lb-°R and neglect potential energy effects. Determine the flow area at the inlet, in ft?, and the power required by the compressor to work, in horsepower. Step 1 Determine the flow area at the inlet, in ft?. A1= ft?
Steam enters the nozzle operating a steady state pressure of 2.5 MPa and a temperature of 300 °C ( H1 = 3008.8 kJ/kg) and leaves at a pressure of 1.7 MPa with a velocity of 470 m/s. The rate of flow of steam through the nozzle is 1360 kg/hr. Neglecting the inlet velocity of the steam and considering the flow in the nozzle is adiabatic, find:a. the exit enthalpy in kJ/kg, ( H2)b. the nozzle exit area ( in cm) if V exit is 0.132 m^3 /kgc. the system
The volumetric flow rate of an ideal gas in a pipe is 3.51lt/sec. If the temperature of the gas is T=300°K and the pressure is 1bar, determine the mass flow rate of the gas in the pipe. The specific gas constant is R=287J/(kg.°K). Present your answer in grams per second (gram/s).
I am getting lost in this practice problem for thermodynamics - thank you! Air at 100 kPa and 280K is compressed steadily to 600 kPa and 400K in an air compressor. The mass flow rate of air through the compressor is 0.02 kg/s and the compressor a heat loss of 16 kJ/kg from the compressor occurs. Assuming steady state steady flow conditions and ideal gas behavior (with constant specific heats, Cp=1.009 kJ/kgK, R=0.287 kJ/kgK, determine: a) The necessary power in put to the compressor(kW).b) The volumetric flow rate of air at the exit of the compressor (m3/s).
Air at 15 degree Celsius and 95 kpa enters the diffuser of a jet engine and steadily with a velocity of 250 m/s. The inlet area of the diffuser is 0.5 m^2. The air leaves the diffuser with a velocity that is very small compared with the inlet velocity. Find the mass flow of air, temperature of air leaving diffuser, power and rate of heat transfer within diffuser.
Carbon dioxide gas is compressed at steady state from a pressure of 20 Ibf/in? and a temperature of 32°F to a pressure of 50 Ibf/in? and a temperature of 120°F. The gas enters the compressor with a velocity of 30 ft/s and exits with a velocity of 80 ft/s. The mass flow rate is 2500 Ib/hr. The magnitude of the heat transfer rate from the compressor to its surroundings is 5% of the compressor power input. Use the ideal gas model with cp = 0.21 Btu/lb.°R and neglect potential energy effects. Determine the flow area at the inlet, in ft2, and the power required by the compressor to work, in horsepower.
Water flows through a horizontal coil heated by steam condensing on the outside. If the inlet pressure and temperature are 2 atm and 160°F (state 1) and at the exit 1 atm and 220°F (state 2), calculate the heat added to the coil per pound mass of water. The entering velocity in 5 ft/s, and the leaving, 500 ft/s. Data: H1=127.9 BTU/lb, H2=1154.4 BTU/lbA. 1031 BTU/lbB. 1042 BTU/lbC. 1048 BTU/lbD. 1052 BTU/lb
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
4. In a steady flow apparatus,135kJ of work is done by each kg of fluid. The specific volume of the fluid, pressure and speed at the inlet are 0.37 m3/kg, 600 kpa, and 16 m/s. The inlet is 32 m above the floor, and the discharge pipe is at floor level. The discharge conditions are 0.62 m3/kg,-100 kpa, and 270 m/s. The total heat loss between the inlet and discharge is 9kJ/kg of fluid. In flowing through this apparatus, does the specific internal energy increase or decrease, and by how much? Draw a figure or FBD that will support the problem. Explain each step by step formula.
In turbochargers a turbine is directly connected to a compressor. The power harvested by the turbine is used to power the compressor. In the figure below a turbine runs on steam and powers a compressor on air. Air can be considered a perfect gas with k = 1.34, R = = 300K and a mass flow 0.28 kJ/kgk = 1bar, T₁ = and Cp 1.02 kJ/kgK. The air enters the compressor at p₁ rate of mdot = 5.9 kg/s and exits at p2 = 5.2 bars. The steam enters the isentropic turbine at P3 = 2 MPa, T3 = 320°C and exits at p4 = 100 kPa. State 2 Isentropic Compressor State 1 Air-perfect gas T₁ = 300K P₁ = 1 bar W Answer: tubine = ? State 4 Isentropic Turbine State 3 Steam T3=320°C P3= 2MPa What is the enthalpy at state 2? Please enter your answer in kJ/kg
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.