www.DaikinApplied.com 65
AG 31-011 • REFRIGERANT PIPING DESIGN
Table 38: R-22 Minimum Capacity for Suction Riser (kW)
Saturated
Suction
Temp
Suction
Gas
Temp
Pipe O .D . (mm)
(°C)
(°C)
12
15
18
22
28
35
42
54
67
79
105
130
-40
-35
0.182
0.334
0.561
0.956
1.817
3.223
5.203
9.977
14.258
26.155
53.963
93.419
-25
0.173
0.317
0.532
0.907
1.723
3.057
4.936
9.464
16.371
24.811
51.189
88.617
-15
0.168
0.307
0.516
0.880
1.672
2.967
4.791
9.185
15.888
24.080
49.681
86.006
-20
-15
0.287
0.527
0.885
1.508
2.867
5.087
8.213
15.748
27.239
41.283
85.173
147.449
-5
0.273
0.501
0.841
1.433
2.724
4.834
7.804
14.963
25.882
39.226
80.929
140.102
5
0.264
0.485
0.815
1.388
2.638
4.680
7.555
14.487
25.058
37.977
78.353
135.642
-5
0
0.389
0.713
1.198
2.041
3.879
6.883
11.112
21.306
36.854
55.856
115.240
199.499
10
0.369
0.676
1.136
1.935
3.678
6.526
10.535
20.200
34.940
52.954
109.254
189.136
20
0.354
0.650
1.092
1.861
3.537
6.275
10.131
19.425
33.600
50.924
105.065
181.884
5
10
0.470
0.862
1.449
2.468
4.692
8.325
13.441
25.771
44.577
67.560
139.387
241.302
20
0.440
0.807
1.356
2.311
4.393
7.794
12.582
24.126
41.731
63.246
130.488
225.896
30
0.422
0.774
1.301
2.217
4.213
7.476
12.069
23.141
40.027
60.665
125.161
216.675
ASHRAE Handbook Refrigeration, Chapter 2, 2006.
© American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.,
Refrigeration capacity in kilowatts is based on saturated evaporator as shown in table and condensing temperature of 40°C. For
other liquid line temperatures, use correction factors in the following table.
Liquid Temperature (°C)
20
30
50
1.17
1.08
0.91
Table 39: R-134a Minimum Capacity For Suction Riser (kW)
Saturated
Suction
Temp
Suction
Gas
Temp
Pipe O .D . (mm)
(°C)
(°C)
12
15
18
22
28
35
42
54
67
79
105
130
-10
-35
0.274
0.502
0.844
1.437
2.732
4.848
7.826
15.006
25.957
39.340
81.164
140.509
-25
0.245
0.450
0.756
1.287
2.447
4.342
7.010
13.440
23.248
35.235
72.695
125.847
-15
0.238
0.436
0.732
1.247
2.370
4.206
6.790
13.019
22.519
31.129
70.414
121.898-5
-5
-15
0.296
0.543
0.913
1.555
2.956
5.244
8.467
16.234
28.081
42.559
87.806
152.006
-5
0.273
0.500
0.840
1.431
2.720
4.827
7.792
14.941
25.843
39.168
80.809
139.894
5
0.264
0.484
0.813
1.386
2.634
4.674
7.546
14.468
25.026
37.929
78.254
135.471
5
0
0.357
0.655
1.100
1.874
3.562
6.321
10.204
19.565
33.843
51.292
105.823
183.197
10
0.335
0.615
1.033
1.761
3.347
5.938
9.856
18.380
31.792
48.184
99.412
172.098
20
0.317
0.582
0.978
1.667
3.168
5.621
9.075
17.401
30.099
45.617
94.115
162.929
10
10
0.393
0.721
1.211
20.63
3.921
6.957
11.232
21.535
37.250
56.456
116.479
201.643
20
0.370
0.679
1.141
1.944
3.695
6.555
10.583
20.291
35.098
53.195
109.749
189.993
30
0.358
0.657
1.104
1.881
3.576
6.345
10.243
19.640
33.971
51.486
106.224
183.891
ASHRAE Handbook Refrigeration, Chapter 2, 2006.
© American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc.,
Refrigeration capacity in kilowatts is based on saturated evaporator as shown in table and condensing temperature of 40°C. For
other liquid line temperatures, use correction factors in the following table.
Liquid Temperature (°C)
20
30
50
1.20
1.10
0.89