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流量換算表 功與能換算表 功率換算表
壓力單位換算表 空氣管路壓力損失表 孔口與排氣量對照表
空壓機馬力適用於冷卻水塔對照表  
各種管接頭相當於直管公尺數之壓力損失(M)

 
流量換算表 Flow Conversion Table:
i / min m3 / hr CFM GPM (英) GPM (美)
1
16.667
28.3153
4.5455
3.785
0.06
1
1.699
0.2727
0.2271
0.03532
0.5887
1
0.1605
0.1337
0.220
3.667
6.229
1
0.8325
0.2642
4.404
7.481
1.2011
1
 
功與能換算表 Work-Energy Conversion Table:
joule kg - m ft - lb kw - hr ps - hr HP -hr kcal BTU
1
9.807
1.356
3.6 x 106
2.684 x 106
2.686 x 106
4186
1055
0.10197
1
0.1383
3.671 x105
2.700 x105
2.739 x105
426.9
107.6
0.7376
7.233
1
2.655 x 106
1.9533 x 106
1.981 x 106
3087
778.0
0.062778
0.052724
0.063766
1
0.7355
0.746
0.001163
0.0002930
0.063777
0.053704
0.065121
1.3596
1
1.0143
0.001581
0.0003984
0.063724
0.053652
0.065049
1.3405
0.9859
1
0.001559
0.0003928
0.0002389
0.002343
0.0003239
860.0
632.5
641.6
1
0.2520
0.0009480
0.009297
0.001285
3413
2510
2546
3.966
1
 
功率換算表 Power Conversion Table:
PS kW kg-m/sec ft-lb/sec kcal/sec BTU/sec HP
1
1.0143
1.3596
0.01333
0.001843
5.691
1.434
0.7355
0.746
1
0.0009807
0.001356
4.186
1.055
75
76.07
101.97
1
0.1383
426.9
107.6
542.5
550.2
737.6
7.233
1
3087
778.0
0.1757
0.1782
0.2389
0.002343
0.33239
1
0.2520
0.6973
0.7072
0.9480
0.009297
0.001285
3.968
1
0.98635
1.00045
1.34104
0.01314
0.001818
5.61331
141442
 
壓力單位換算表 Pressure Unit Conversion Table:
 
孔口與排氣量對照表:
經過孔口之排氣,在 14.7psia ( 1 kgf / cm2 a ) 與 70 °F ( 21 °C )之大氣壓下每分鐘自由空氣之 M3
Dclivcry via Aperture, Free air M3 / min at 14.7 psia ( 1 kgf / cm2 a ) and 70 °F ( 21 °C )
孔口前錶壓力
Gauge pressure before passing through
孔口 直徑
Aperture d110iameter   ( mm )
0.397 0.794 1.588 3.175 6.35 9.525 12.700 15.875 19.050 22.225 25.400
kg / cm2 psi 排氣每分鐘之自由空氣
Free air delivery   e/min
排氣每分鐘 M3 之自由空氣
Free air delivery   m3 / min
0.068 1 0.793 3.172 12.744 50.976 0.203 0.459 0.813 1.274 1.832 2.495 3.257
0.136 2 1.133 4.475 17.927 71.650 0.286 0.646 1.147 1.793 2.583 3.512 4.588
0.211 3 1.360 5.494 21.948 87.792 0.351 0.787 1.402 2.195 3.144 4.305 5.607
0.272 4 1.586 6.315 25.261 100.819 0.405 0.909 1.614 2.526 3.625 4.956 6.460
0.340 5 1.756 7.023 26.423 112.430 0.450 1.011 1.798 2.812 4.050 5.522 7.193
0.408 6 1.926 7.703 30.867 122.909 0.493 1.107 1.968 3.087 4.418 6.032 7.873
0.476 7 2.067 8.298 33.134 132.538 0.530 1.195 2.124 3.313 4.758 6.514 8.496
0.612 9 2.351 9.374 37.382 150.096 0.598 1.351 2.399 3.738 5.409 7.363 9.600
0.816 12 2.960 10.733 43.046 171.902 0.688 1.546 2.749 4.305 6.174 8.411 10.988
1.020 15 2.974 11.894 47.578 190.310 0.762 1.713 3.059 4.758 6.853 9.317 12.178
1.360 20 3.483 13.905 55.507 222.595 0.889 2.002 3.568 5.551 8.015 10.903 14.245
1.701 25 3.965 15.916 63.720 254.314 1.017 2.291 4.078 6.372 9.147 12.461 16.284
2.041 30 4.475 17.927 71.650 286.032 1.147 2.580 4.588 7.165 10.337 14.047 18.351
2.381 35 4.984 19.909 79.579 320.016 1.274 2.860 5.098 7.958 11.470 15.604 20.390
2.721 40 5.494 21.920 87.792 351.168 1.405 3.712 5.607 8.780 12.631 17.190 22.458
3.061 45 5.975 23.930 95.722 382.320 1.532 3.455 6.117 9.572 13.792 18.748 24.497
3.401 50 6.485 25.941 103.65 416.304 1.660 3.738 6.655 10.365 14.953 20.334 26.564
4.082 60 7.476 30.019 119.794 478.608 1.914 4.305 7.675 11.979 17.247 23.449 30.642
4.762 70 8.496 33.984 135.653 543.744 2.172 4.899 8.694 13.565 19.541 26.597 34.749
5.442 80 9.487 37.949 151.795 606.048 2.427 5.466 9.714 15.180 21.835 29.736 38.827
6.122 90 10.478 41.914 167.654 671.184 2.685 6.032 10.733 16.765 24.160 32.800 42.933
6.803 100 11.498 45.878 183.797 736.32 2.945 6.627 11.753 18.380 26.451 36.023 47.040
7.483 110 12.489 49.843 199.656 798.624 3.200 7.193 12.801 19.966 28.773 39.167 51.146
8.163 120 13.480 54.091 215.798 863.76 3.455 7.760 13.820 21.580 31.067 42.310 55.252
8.503 125 13.990 56.074 223.728 894.912 3.568 8.043 14.300 22.373 32.228 43.868 57.291
根據百分之百之流量係數,設若進口極圓時,則以 0.97 乘以值,設若為一銳緣孔口時,則乘數用 0.65。
此表僅能產生近似之結果,若欲作精確之測量,則請見 ASME 動力試驗規格流動容積速度之測量。
1 至 15psig 壓力值之計算,係使用標準絕熱公式。
超過 15psig 壓力值計算,係使用此近似之公式: w=0.5303acp./( √ T )。其中 w= 每秒排出之磅數,a= 孔口面積,平方吋,c= 流量係數,p= 上流總壓力,psia,T= 上流溫度,F 絕對。
上述情況值之計算係 c+1.0 , p= 錶壓 +14.7psia , T= 530F 絕對。
重量數改為容量時,則使用每立呎 0.0749 磅密度因素,此係用於 14.7psia 則此 70F 乾空氣之修正。
此公式不能用於 p ,少於兩倍大氣壓。
 
On thc basis of a 100% flow coefficient, supposc that the inlet is extremely round, then multiply the value by 0.97; if the aperture has knife edge, multiply them by 0.65.
We can obtain only approximate results here. Fore accurate mcasurement, refer to measurement of flow volume speed in ASME Power Experiment Specifications.
The standard thermal insulation formula is used in computation of pressure values between 1 and 15 psig.
For the computation of pressure values over 15 psig, the following approximate formula is used : w= 0.5303acp./( √ T ),in which w= delivered pounds/sec, a= aperture area( in2 ), c= flow coefficient, p= upstream gross pressure (psia), T= upstream temperature ( °F absolute).
In the above cases of computation, c= 1.0, p= gauge pressure +14.7 psia, T= 530°F absolute.
When weight is subtituted by volume, the density factor of 0.0749 lb / ft3 is used instead, which is for 14.7 psia. So the 70°F is dry air correction.
Thc formula is not applicabie for p less than twice the atmospheric pressure.
 
空氣管路壓力損失表 Table of Pressure Loss In Air Pipes:
自由空氣量 - 空氣之壓降 kg / cm2 ( l00meter ) Free air capacity-Piping pressure drop kg / cm2 ( l00m )
m3 / min 管徑 in.
1/2 3/4 1 1 1/4 1 1/2 2 2 1/2 3 3 1/2
0.2
0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
2.8
3.0
3.2
3.4
3.6
3.8
4.0
4.2
4.4
4.6
4.8
5.0
5.5
6.0
0.367
1.47
3.30
5.87
9.18
13.2
18.0
23.5
0.0766
0.306
0.689
1.23
1.92
2.76
3.75
4.91
6.20
7.66
9.26
11.0
12.9
15.0
17.2
19.6
22.2
0.0212
0.0848
0.191
0.339
0.530
0.763
1.04
1.36
1.72
2.12
2.56
3.15
3.58
4.15
4.77
5.43
6.13
6.86
7.66
8.48
9.35
10.3
11.2
12.2
13.3
16.0
19.1

0.0214
0.0483
0.0858
0.134
0.193
0.263
0.343
0.434
0.536
0.649
0.772
0.906
1.05
1.21
1.37
1.55
1.74
1.94
2.14
2.36
2.59
2.84
3.09
3.35
4.06
4.82


0.0213
0.0379
0.0593
0.0854
0.116
0.152
0.192
0.237
0.287
0.342
0.401
0.464
0.533
0.607
0.684
0.767
0.855
0.948
1.05
1.15
1.25
1.36
1.48
1.79
2.13




0.0167
0.0240
0.0327
0,0428
0,0541
0.0668
0.0808
0.0961
0.113
0.131
0.150
0.171
0.193
0.216
0.241
0.267
0.295
0.323
0.353
0.385
0.418
0.505
0.601









0.0177
0.0214
0.0255
0.0299
0.0346
0.0398
0.0453
0.0511
0.0573
0.0636
0.0708
0.0780
0.0855
0.0934
0.102
0.111
0.134
0.159














0.0158
0.0180
0.0203
0.0228
0.0254
0.0282
0.0311
0.0341
0.0372
0.0406
0.0440
0.0533
0.0634





















0.0158
0.0173
O.0189
0.0204
0.0248
0.0294
m3 / min 管徑 in.
1 1/2 2 2 1/2 3 3 1/2 4 5 6 8
6.5
7.0
7.5
8.0
8.5
9.0
9.5
10
11
12
13
14
15
16
17
18
19
20
22
24
26
28
30
35
40
45
50
2.50
2.90
3.33
3.79
4.28
4.80
5.35
5.93
7.17
8.53
10.0
11.6
13.3
15.2
17.1
19.2
21.4
0.709
0.815
0.940
1.07
1.21
1.35
1.51
1.67
2.02
2.40
2.82
3.27
3.76
4.28
4.83
5.41
6.03
6.68
8.08
9.62
11.3
13.1
15.0
20.4
0.187
0.217
0.249
0.283
0.319
0.358
0.399
0.442
0.535
0.637
0.747
0.866
0.995
1.13
1.28
1.43
1.60
1.77
2.14
2.55
2.99
3.47
3.98
5.41
7.08
8.95
11.0
0.0744
0.0863
0.0990
0.113
0.127
0.143
0.159
0.176
0.213
0.254
0.298
0.345
0.396
0.450
0.509
0.570
0.635
0.704
0.851
1.01
1.19
1.38
1.58
2.16
2.82
3.56
4.40
0.0346
0.0401
0.0460
0.0524
0.0590
0.0662
0.0738
0.0818
0.0990
0.118
0.138
0.160
0.184
0.309
0.236
0.265
0.295
0.327
0.396
0.471
0.553
0.641
0.736
1.00
1.31
1.66
2.04



0.0274
0.0309
0.0347
0.0386
0.0428
0.0518
0.0616
0.0723
0.0839
0.0963
0.110
0.124
0.139
0.155
0.171
0.209
0.246
0.289
0.335
0.385
0.525
0.685
0.866
1.07








0.0165
0.0196
0.0230
0.0260
0.0306
0.0348
0.0393
0.0441
0.0491
0.0544
0.0659
0.0784
0.0920
0.107
0.122
0.167
0.218
0.276
0.340














0.0158
0.0177
0.0198
0.0219
0.0265
0.0315
0.0370
0.0429
0.0493
0.0670
0.0876
0.111
0.137























0.015
0.020
0.025
0.0315
m3 / min 管徑 in.
2 1/2 3 3 1/2 4 5 6 8 10 12 14 16 18
55
60
65
70
75
80
85
90
95
100
13.375
15.92
5.345
6.360
7.465
8.658
9.939
11.308
2.488
2.960
3.475
4.031
4.627
5.265
5.943
6.663
7.424
8.226
1.3
1.547
1.816
2.106
2.418
2.751
3.106
3.482
3.879
4.299
0.411
0.489
0.574
0.666
0.764
0.870
0.982
1.101
1.227
1.359
0.166
0.197
0.232
0.269
0.308
0.351
0.396
0.444
0.495
0.548
0.0381
0.0454
0.0532
0.0617
0.071
0.081
0.091
0.102
0.114
0.126
0.012
0.0144
0.0169
0.0196
0.0224
0.0255
0.0288
0.0325
0.0360
0.0400

0.0055
0.0064
0.0075
0.0086
0.0097
0.0110
0.0123
0.0137
0.0152






0.0062
0.0069
0.0077
0.0085







0.0033
0.0037
0.0041
 
管徑實際壓力降 = 表值 x ( 管長 / 100 ) x 壓縮比 ; ( 壓縮比 = 錶壓力+1)
Actual caliber pressure drop = Tab1e value* ( Pipe length / 100 ) *Compression ratio ; ( Compression ratio = Gaugepressure+1 )
 
各種管接頭相當於直管公尺數之壓力損失(M)

Pressure Loss of Pipe Joints Equivalent to Straight Pipe in Meters (M):

 
空壓機馬力適用於冷卻水塔對照表
Air Compressor System Planning Guideline :
一. 壓力之決定:
  1. 壓力越高,耗電越大。須考慮配管尺寸大小及長度所造成之壓力降,加上使用壓力 即為最下限之壓力。
  2. 列出各種機械之使用壓力,如使用壓力相差太多時,則須購置不同壓力之空壓機或使用增壓機,不可降低壓力使用,增加電 費之出。
Operation pressure:
  1. The higher operating pressure, the more power consumed.The minimum operating pressure is the working pressure plus the piping loss.Selection of adequate pipe dimension and arrangement should be taken into account.
  2. List required pressure needed of all application for proper compressor selection. If working pressure range is too large, multiple compressors with different working pressures or boosters should be used.Do not regulate high discharge pressure to lower discharge pressure because it will waste energy.
二.場地:
  1. 須寬闊採光良好之場所,以利操做保養。
  2. 溫度低、灰塵少、空氣清淨且通風良好之 場所,室溫應低於 40°C 以下。
Site selection:
  1. Location should have adequate spacing and be well lit for ease of maintenance.
  2. Choose a location with low humidity,minimal dust clean air, and good ventilation with room temperature lower than 40°C .
三. 冷卻水與水質:
  1. 冷卻水水溫宜低,配合冷卻水塔做冷卻。
  2. 應注意冷卻水之PH值,應維持在7左右, 以防結垢,增加清理費用。
  3. 應注意冷卻器之冷卻效果,一般而言壓縮 空氣出口溫度應約在 42°C 左右。
Cooling water:
  1. Low temperature cooling water is preferred. A cooling tower is recommended.
  2. Pay special attention to the PH factor of cooling water.It should be kept around 7.0 to prevent the scale from clogging the copper tube saving maintenance expense.
  3. Pay attention to the heat exchanger's performance.Generally speaking,air outlet temp. of compressed air should be about 42°C
四. 機型之選擇:
  1. 計算出總實際使用風量再加上裕量為宜。
  2. 本公司型錄所列之實際排氣量,皆依美國 ASME測風量設備加以測試證明。
  3. 注意耗能比值,以求省電。
Model selection:
  1. Air delivery shown in our catalog meets code specified by ASME.
  2. Add some allowance to the actual consumption you calculate.
  3. Pay attention to compressor's specific power consumption to save energy.
五. 壓縮空氣品質與要求:
  • 壓縮空中含有 100% 相對濕度的大量水分,它對精密儀器、氣動工具、氣動設備、閥、儀錶、管路等造成莫大的傷害,因為水分會造成銹蝕、堵塞儀器、降低成品品質、損壞設備而且損失大量的金錢於修理維護工作,所以加裝壓縮空氣清淨系統確有其必要。如下圖:
The quality and requirement of compressed air :
  • The compressed air before condensation contains saturated water vapor which will damage precision instruments,pneumatic equipment,instrumentation,piping,etc.For fear of corrosion,clogging, low air quality,damage to apparatus and increased maintenance cost,it is necessary to install an air filtration system as shown below :