How is the air delivery volume of a reciprocating compressor calculated?
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The cylinder diameter is 335 mm, the piston stroke is 400 mm, the motor speed is 333, it is a double-acting type, the inlet temperature is 38°C, and the inlet pressure is 2.8 MPa. How can the air displacement be calculated? (How was the 32.3 m3 value for 4M80-32.3/27-319-BX calculated?) ）
V=0.785d2*L*60*n*i*φ V: Air inflation volume (m3/h) d: Diameter of the first cylinder stage L: Piston stroke n: Rotation speed i: Single-acting = 1； Double-acting = 2 φ = 0.76
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“The cylinder diameter is 335 mm, the piston stroke is 400 mm, the motor speed is 333, it is a double-acting type, the inlet temperature is 38°C, and the inlet pressure is 2.8 MPa. How can the air displacement be calculated? (How was the 32.3 m3 value for 4M80-32.3/27-319-BX calculated?) ) Is the inlet pressure at the owner’s site 2.8 MPa? Is it refined gas? Could you introduce your process? Share it!
This post was last edited by *aoye613 on 2009-11-17 21:35. Please have the original poster verify the parameters provided again. Using the calculation formula provided on the second floor, the result differs significantly from the nominal value. Please use your brains and think about it again.
Actually, I know the formula for the second floor as well, but the values obtained from the calculations differ too much, which is why I’m seeking help. The air delivery volume provided by our compressor is 45,000 cubic meters per hour. And 32.3×60×27＝52326; the result using the formula for the second floor is much different.
6# 970701 should also be multiplied by the gas compression coefficient of 27 MPa; at 28°C, this value is roughly a little over 1.1
The formula provided on the second floor is correct; using the parameters of our factory’s compressors for calculations yields a pumping volume that matches the compressor’s specified value. The calculation of the actual gas delivery volume of a compressor can be done using the following formula: Q = V × (Po + Pi – PH2O) / Pstd. Where Q represents the actual gas delivery volume in m3/h; V is the rated production capacity of the compressor in m3/h; t is the temperature of the gas entering the first cylinder of the compressor in °C; P0 is the atmospheric pressure at the location of the factory in Pa; Pi is the pressure of the gas entering the first cylinder of the compressor in Pa; PH2O is the partial pressure of water vapor in the feed gas, which varies with the temperature of the feed gas; and Pstd is 1.01325×105 Pa
8# liuji2001 I am looking for this formula to estimate the actual air delivery volume of the compressors in my factory. Thank you! ! !
9# Beauty 1: 32.3 seems to represent the air inflation volume under certain intake conditions. The calculated value is 0.785*（0.335）^2*0.4*2*333*0.756 = 17.74, which is quite different from 32.3. The poster should verify whether the motor used is not the original one, as that could result in a lower rotation speed Model 27 has an inlet pressure of 27 MPa, while model 319 has a maximum outlet pressure of 31.9 MPa; it should be a synthetic cycle machine
I think the volume of air delivered by your compressor is given in standard cubic units, that is, the volume at 273K, not at 38 degrees Celsius. If converted to standard cubic units, there will be no error.