Civil Engineering Reference
In-Depth Information
Table 11.2
Characteristics of typical medium-power air compressors
Absolute pressure
Volume flow
(Sm
3
/min)
a
Compressor
ratio
Isothermal power
(15.6
C) (kW)
Isothermal
efficiency (%)
Type of compressor
Power (kW)
Speed (r/min)
MPa
psi
Rotary air-cooled
20
2,950-3,550
2.77
0.79
115
7.8
9.6
48
56
2,950-3,550
9.76
0.45
65
4.4
24.4
44
112
1,450-1,775
20
0.80
116
7.9
69.7
62
146
1,450-1,775
23
0.85
123
8.4
82.5
57
162
1,450-1,775
23
1.00
145
9.9
88.8
55
Rotary water-cooled
20
2,950-3,550
2.77
0.79
115
7.8
9.6
48
56
2,950-3,550
9.91
0.79
115
7.8
343
61
90
1,450-1,775
17.8
0.79
115
7.8
61.6
68
298
1,450-1,775
58.6
039
115
7.8
202.8
68
Reciprocating
56
400-450
9.9
0.79
115
7.8
34.3
61
165
550-600
23
0.90
131
8.9
84.7
51
300
550-600
64
0.79
115
7.8
221.5
74
a
Standard atmospheric conditions 15.6
C, 60
F, 0.1013 MPa, 14.5 psi 1 Sm
3
35.3 Sft
3
ΒΌ
