Sliding vanes compressors: P E D P2 P1 14 C m* B Lc = m* Vo/p - - V 'm* − 1º₁V(pm*−1 − 1) + — (P2 − P10m²) - 2) A sliding vanes compressor (iVo = 2000 cm³, volumetric compression ratio p = 1.8) sucks air at p₁ = 1 bar, T₁ = 291 K and delivers it to a tank. In design conditions, the compressor features a working cycle with gradual compression only, n ≈1, n = 0.88, m* = 1.37. Determine the delivered mass per cycle, the delivery temperature of the compressed air and the compressor isentropic efficiency. Moreover evaluate the new isentropic efficiency and delivery temperature, in case the delivery pressure is reduced to 1.7 bar, for fixed conditions at suction and by considering constant values for nt, no, m*.

Sliding vanes compressors: P E D P2 P1 14 C m* B Lc = m* Vo/p - - V 'm* − 1º₁V(pm−1 − 1) + — (P2 − P10m²) - 2) A sliding vanes compressor (iVo = 2000 cm³, volumetric compression ratio p = 1.8) sucks air at p₁ = 1 bar, T₁ = 291 K and delivers it to a tank. In design conditions, the compressor features a working cycle with gradual compression only, n ≈1, n = 0.88, m = 1.37. Determine the delivered mass per cycle, the delivery temperature of the compressed air and the compressor isentropic efficiency. Moreover evaluate the new isentropic efficiency and delivery temperature, in case the delivery pressure is reduced to 1.7 bar, for fixed conditions at suction and by considering constant values for nt, no, m*.

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 four-stage compressor works between limits of 1 bar and 120 bar. The indexof compression in each stage is 1.25, the temperature at the start ofcompression in each stage is 30 ˚C, and the intermediate pressure areselected such that work is divided equally among the stages. If the clearanceis negligible: Calculate: 1. the volume of free air delivered per kilowatt-hour at 1.013 bar and 20 ˚C2. isothermal work input 3. isothermal efficiency.
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.
4. A single-stage cylinder air compressor is rated at 6.5 cubic meter per minute of air .Suction conditions are 1 atm and 27 deg C and discharge pressure of 1034 KPa. The compression process follows PV1.35 = C. What is the engine Kw power needed to drive the unit if the combined engine-compressor efficiency is 84%?
A single stage turbo blower compresses 1000 m/min of air at 1 bar and 15° C through a pressure ratio of 1.33 with an index of compression n = 1.6, assuming the power input to the blower to be 800 kw and C,= 1.005 Calculate Isentropic efficiency of blower R=287 J/kg-K.
I need the answer as soon as possible
0)
In an axial flow compressor of Boeing 777 Turbofan engine, air enters ambient conditions 17 C and 1 bar. The axial velocity of air is 180 m/s (constant throughout the stage), the rotor speed of 200 m/s, the absolute velocity at the inlet is 185 m/s, the work done factor is 0.95, and the degree of reaction is 50%. If the stage efficiency is 0.86, calculate the air angles at the rotor inlet and outlet, the static temperature at the inlet of the first stage, and stage pressure ratio. *
A single acting two-stage air compressor deals with 4 m^3/min of air under atmospheric conditions of 1.013 bar and 15°C with aspced of 250r.p.m. The delivery pressure is 80 bar. Assuming complete inlercooling, find the minimum power required by the compressor and the bore and stroke of the compressor. Assume a pistonspeed of 3 m/s, mechanical efficiency of 75 percent, and volumetric efficiency of 80 percent per stage. Assumethe polytropic index of compression in both the stages to be it = 1.25 and neglect clearance.
A single stage ,Single acting reciprocating compressor is designed to run at 1000rpm and deliver air at 25 bar in atmospheric conditions of 1.013 bar and 23°C . The compressor is to deliver 6.25m³/min of air.The compressor volume is 3% of the swept volume and the stroke/bore ratio is 1.2 to 1 Calculate (i) The bore and Stroke (ii) The volumetric efficiency of the machine (iii) The indicated power (iv) Isothermal efficiency
Q3//a steam turbine develops 3000 kW when the steam is supplied at 10 bar, 250 °C. The vacuum reading on the condenser is 65 cm Hg when the barometer reads 75.2 cm Hg. The temperature rise of cooling water is limited to 15 °C. The temperature the condensate coming out of the condenser is 35 °C. Neglecting the air leakage to the system and assuming the expansion through the turbine as isentropic, find: 1. Specific steam consumption of the plant. 2. The thermal efficiency of the plant. 3. The quantity of cooling water circulated through the condenser per hour. Answer (5.05 kg/kWh, 25.5%, 503 ton/hr).
A single-acting two-stage air compressor deals with 4 m³/min of air at 1.013 bar and 15°C with a speed of 250 rpm. The delivery pressure is 80 bar. Assuming complete intercooling, find the minimum power required by the compressor and the bore and stroke of the compressor. Assume a piston speed of 3 m/s, mechanical efficiency of 75% and volumetric efficiency of 80% per stage. Assume the polytropic index of compression in both the stages to be n = 1.25 and neglect clearance.
Answer 1.8 and 1.9