A single stage double acting air compressor delivers 15 m3/min. measured at 1.013 bar and temperature...

A single stage double acting air compressor delivers 15 m3/min. measured at 1.013 bar and temperature 270C and delivers at 7 bar. The conditions at the end of the suction stroke are pressure 0.98 bar and temperature 400C. The clearance volume is 4% of the swept volume and the stroke / bore ratio is 1.3/1, compressor runs at 992 rpm. Calculate the volumetric efficiency, cylinder dimensions, indicated power and isothermal efficiency of this compressor. Take the index of compression and expansion as 1.3, R= 0.587kJ/Kg-K.

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samet mamat answered 2 days ago

. A single stage double acting air compressor delivers 5 m of free air per minute...

. A single stage double acting air compressor delivers 5 m of free air per minute at 1 bar and 20 C to 7.5 bar with the following data;R.P.M. = 300; Temperature rise of air during suction stroke = 12 C ; Clearance volume = 5% of stroke volume; Index of compression and expansion, n=1.3; Length of the stroke = 1.3 times the cylinder diameter. Calculate: 1. Power input to the shaft; 2. The volumetric efficiency; and 3. The cylinder...

A two stage, single-acting compressor has a free air delivery of 4.2 m3/min when the ambient...

A two stage, single-acting compressor has a free air delivery of 4.2 m3/min when the ambient condition is 1.013 bar, 15oC. • The suction pressure and temperature are 0.98 bar and 32oC respectively. • The air is compressed to 16 bar according to the law pv1.3 = C. Assuming that the compressor is designed for minimum work with complete intercooling, calculate the indicated power required to drive the compressor.

A single stage double acting air compressor having a clearance of 4% takes in air at...

A single stage double acting air compressor having a clearance of 4% takes in air at 14.2 Psia and 60 and compresses it to 200 Psia. If the weight of the air compressed per minute is 50 lbs. and n = 1.35, compute: a) The work required to compress the air per minute b) The piston displacement if the compressor operates at 100 RPM c) The volume of free air measured at 14.7 Psia atmospheric pressure.

A window-mounted air conditioner supplies 19 m3/min of air at 15°C, 1 bar to a room....

A window-mounted air conditioner supplies 19 m3/min of air at 15°C, 1 bar to a room. Air returns from the room to the evaporator of the unit at 22°C. The air conditioner operates at steady state on a vapor-compression refrigeration cycle with Refrigerant 22 entering the compressor at 4 bar, 10°C. Saturated liquid refrigerant at 11.5 bar leaves the condenser. The compressor has an isentropic efficiency of 70%, and refrigerant exits the compressor at 11.5 bar. Determine: (a) the compressor...

A window-mounted air conditioner supplies 29 m3/min of air at 15°C, 1 bar to a room....

A window-mounted air conditioner supplies 29 m3/min of air at 15°C, 1 bar to a room. Air returns from the room to the evaporator of the unit at 22°C. The air conditioner operates at steady state on a vapor-compression refrigeration cycle with Refrigerant 22 entering the compressor at 4 bar, 10°C. Saturated liquid refrigerant at 9 bar leaves the condenser. The compressor has an isentropic efficiency of 70%, and refrigerant exits the compressor at 9 bar. Determine: (a) the compressor...

15 m3 /min of air at 104o F and 60% relative humidity is cooled to 59o...

15 m3 /min of air at 104o F and 60% relative humidity is cooled to 59o F and 100% relative humidity, and then reheated to 68o F. Find the following: a. The flow rate of dry air (BDA) in kg /min. b. The amount of water condensed during cooling stage. c. kW of power needed for cooling the air in the cooling stage. d. kW of power needed for the heating step.

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Consider a compressor in which air enters at 1 bar, 27°C and exits at 3.5 bar,...

Consider a compressor in which air enters at 1 bar, 27°C and exits at 3.5 bar, 127°C. The work required is 127 kJ/kg of air flowing through the compressor. Heat transfer between the compressor and environment occurs at 27°C. Determine (a) the heat transfer, in kJ/kg (b) the entropy generation rate, in kJ/kg.K, for the compressor as a control volume (c) the entropy generation rate, in kJ/kg.K, for the compressor and the surrounding environment (d) the entropy generation rate, in...

. Air in a 0.3 m3 cylinder is initially at a pressure of 10 bar and...

. Air in a 0.3 m3 cylinder is initially at a pressure of 10 bar and a temperature of 330 K. The cylinder is to be emptied by opening a valve and letting the pressure drop to that of the atmosphere. What will be the final temperature and mass of gas in the cylinder if this is accomplished: a) In a manner that maintains the temperature of the gas at 330 K? b) In a well-insulated cylinder (Answer: Tfinal =...

3.70 kg / min of air as ideal gas enters a steady state compressor that runs...

3.70 kg / min of air as ideal gas enters a steady state compressor that runs adiabatically. Air enters P1 = 300 kPa and T1 = 440 K and exits at P2 = 500 kPa. If the isentropic efficiency of the turbine is 0.876, what is the work, in kW?

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