Problem 2: In which of the following cases the compressor will have the lowest absolute airflow: Corrected airflow Wa.101300/P2. √(T2/288), kg/s inlet temperature, C inlet pressure, Pa a 290 b 300 C 320 28 20 25 92500 94200 98100

Problem 2: In which of the following cases the compressor will have the lowest absolute airflow: Corrected airflow Wa.101300/P2. √(T2/288), kg/s inlet temperature, C inlet pressure, Pa a 290 b 300 C 320 28 20 25 92500 94200 98100

Principles of Heat Transfer (Activate Learning with these NEW titles from Engineering!)

8th Edition

ISBN:9781305387102

Author:Kreith, Frank; Manglik, Raj M.

Publisher:Kreith, Frank; Manglik, Raj M.

Chapter10: Heat Exchangers

Section: Chapter Questions

Problem 10.19P

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Assuming the clearance is negligible for a single stage compressor with the followingdata.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/minTake “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K Calculatate the following 1 )Evaluate the mass flow rate of air inside the compressor operating isentropically in kg/min to 3 decimal places. 2 ) What is the power input to the compressor in kW to 3 decimal places if the compression reversible isothermal? 3 ) What is the power input to the compressor in kW to 2 decimal places if the compression is polytropic compression process with n=1.25?
Assuming the clearance is negligible for a single stage compressor with the following data.Atmospheric pressure: 90 kPaAtmospheric temperature: 17 ˚CDelivery pressure: 7 barFree air delivery flow rate: 0.2 m3/min Take “n” as 1.3, cp = 1.005 kJ/kg K, cv = 0.718 kJ/kg K 1.Evaluate the mass flow rate of air inside the compressor operating isentropically in kg/min to 3 decimal places.
A three stage, single-acting air compressor with a polytropic index of 1.22 in all stages, runs in an atmosphere at 101.3 kPa and 25°C. It has a FAD of 4.2 m^3/min with a delivery pressure of 1.8 MPa. Induction occurs at 92 kPa and 34°C. The mechanical and motor-drive efficiencies are 80% and 93% respectively. Assume complete inter-cooling and neglect clearance volume. Cp= 1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) calculate the input power required from an electric motor? 2) which figure represents the diagram for the process?
A three stage, single-acting air compressor with a polytropic index of 1.22 in all stages, runs in an atmosphere at 101.3 kPa and 25°C. It has a FAD of 4.2 m^3/min with a delivery pressure of 1.8 MPa. Induction occurs at 92 kPa and 34°C. The mechanical and motor-drive efficiencies are 80% and 93% respectively. Assume complete inter-cooling and neglect clearance volume. Cp= 1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) which formula should be used to determine the indicated power of the compressor? 2) calculate the indicated power of the compressor in kW? 3) which formula should be used to determine the input power required from an electric motor?
A three stage, single-acting air compressor with a polytropic index of 1.22 in all stages, runs in an atmosphere at 101.3 kPa and 25°C. It has a FAD of 4.2 m^3/min with a delivery pressure of 1.8 MPa. Induction occurs at 92 kPa and 34°C. The mechanical and motor-drive efficiencies are 80% and 93% respectively. Assume complete inter-cooling and neglect clearance volume. Cp= 1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) which formula should be used to calculate the intermediate pressure? 2) calculate the intermediate pressure between the first and the second stage on kPa? 3 calculate the intermediate pressure between the second and the third stage in kPa?
A three stage, single-acting air compressor with a polytropic index of 1.22 in all stages, runs in an atmosphere at 101.3 kPa and 25°C. It has a FAD of 4.2 m^3/min with a delivery pressure of 1.8 MPa. Induction occurs at 92 kPa and 34°C. The mechanical and motor-drive efficiencies are 80% and 93% respectively. Assume complete inter-cooling and neglect clearance volume. Cp= 1.006 kJ/kg K Cv= 0.717 kJ/kg K 1) which formula should be used to calculate the temperature of the air at entrance to the 2nd intercooler? 2) calculate the temperature of the air at entrance to the 2nd intercooler in the presentable unit? 3) which formula should be used to calculate the rate of heat rejected in the 2nd intercooler?
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Methanol (SG=0.792) is contained in a large tank under a pressure of 350000 Pa absolute. When a valve on the bottom of the tank is opened, the methanol drains freely though a 0.02 m ID tube whose outlet is 7.00 m below the surface of the methanol. The pressure at the outlet of the discharge pipe is 101325 Pa. Some useful constants and conversions: g = 9.8 m/s2 , Pref = 1000 kg/m3 . a. Draw the system. Label points I and 2 (where you will define A= 2-1) and label the variables with values b Write the general form of the energy balance. Cancel out negligible terms, and state the keyword/assumption to justify. Simplify to the resultant energy balance. c.) Assume the diameter of the tank is very big compared to the drain tube velocity, which make the velocity of liquid in the tank equal to zero. Estimate the methanol discharge velocity in the drain tube in m/s. *hint: divide your EB by m to eliminate m and V. Recall, n = pV = pvA and = v/m=1/p
A three-stage single acting air compressor with a polytropic index of 1.22 in all stages, runs in an atmosphere at 101.3 kPa and 25°C. It has a FAD of 4.2 m^3/min with a dilivery pressure of 1.8 MPa. Induction occurs at 92 kPa and 34°C. The mechanical and motor-driver efficiencies are 88% and 93% respectively. Assume complete inter-cooling and neglect clearance volume. Cp=1.006 kJ/kg K Cv=0.717 kJ/kg K 1) which formula should be used to calculate the intermediate pressures? 2) calculate the intermediate pressure between the first and the second stage in kPa? 3) calculate the intermediate pressure between the second and the third stage in kPa? 4) which formula should be used to calculate the temperature of the air at entrance to the 2nd intercooler? 5) calculate the temperature of the air at entrance to the 2nd intercooler in the presentable unit? 6) which formula should be used to calculate the rate of heat rejected in the 2nd intercooler? 7) calculate the rate of heat rejected…
10 m3 /min of free air is to be compressed to 8 bar gauge in two stages. Assuming an intercooler pressure of 2 bar gauge and polytropic index of 1.3, what is the power consumption of the first stage compressor ? pls choose one a.20.44 KW b.48.8 HP c.22.4 litre/mole d.42.2 bar-m3/min e.25.12 KW
Engineer CoolAir is working on designing an air conditioning unit that handles the combined air flow from two food processing rooms with the following quantities: 4000 ft^3/ min at 80° F wet bulb and 50% saturated; 3000 ft^3/min at 70° F dry bulb and 65°F wet bulb temperatures. (a) What is the total mass flow rate? (b) What is the dry bulb temperature? (c) what is the wet bulb temperature?
Oxygen flows isentropically through a 100 mm −diameter pipe. At one point, the velocity of flow, pressure , and unit weight are 125 m/s, 450 kPa, and 0.058 kN m3 ⁄ , respectively. At another point a short distance away from the first, the pressure is 360 kPa. Determine the velocity at the second point.