Daikin R22, Руководство по проектированию трубопроводов для хладагента, Страница: 64 / 78

AG 31-011 • REFRIGERANT PIPING DESIGN 64 www.DaikinApplied.com
Table 37: R-407C Refrigerant Line Size Table (kW)
Suction Discharge Liquid
SST -20°C -5°C 5°C -20°C -5°C 5°C
∆ T
(K/m)
0 .04 0 .02 0 .01 0 .04 0 .02 0 .01 0 .04 0 .02 0 .01 0 .02 0 .02 0 .02
vel = 0 .5
m/s
2
∆ p
(Pa/m)
358 .5 179 .3 89 .6 561 .9 281 140 .5 734 .3 367 .1 183 .6 799 .8 799 .8 799 .8 854 .9
OD (mm)
12 0.65 0.44 0.30 1.19 0.81 0.55 1.72 1.17 0.80 2.47 2.61 2.70 6.5 11.7
15 1.24 0.85 0.58 2.28 1.56 1.06 3.27 2.24 1.53 4.71 4.98 5.15 10.5 22.3
18 2.17 1.48 1.00 3.96 2.71 1.85 5.67 3.89 2.66 8.16 8.63 8.91 16.0 38.8
22 3.82 2.61 1.78 6.97 4.78 3.26 9.98 6.86 4.70 14.34 15.16 15.67 24.5 68.2
28 7.56 5.17 3.53 13.76 9.45 6.47 19.66 13.54 9.29 28.24 29.85 30.84 40.9 134.8
35 13.90 9.52 6.51 25.18 17.36 11.9 35.97 24.8 17.06 51.69 54.65 56.47 64.7 247.2
42 23.04 15.82 10.84 41.76 28.75 19.76 59.52 41.12 28.32 85.46 90.34 93.35 94.9 409.8
54 45.84 31.50 21.63 82.78 57.14 39.32 117.94 81.62 56.27 169.13 178.79 184.76 159.7 813.2
67 81.59 56.25 38.59 147.33 101.74 70.12 209.38 145.23 100.33 300.43 317.59 328.18 247.6 1446.8
79 126.37 87.17 59.91 227.71 157.62 108.68 323.76 224.39 155.40 463.81 490.30 506.66 345.2 2239.0
105 270.09 186.59 128.63 485.80 337.06 232.78 690.10 479.50 332.20 987.20 1043.58 1078.40 616.2 4783.9
ASHRAE Handbook Refrigeration, Chapter 2, 2006.
© American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., www.ashrae.org
Values in Table 37 are based on 40°C condensing temperature. Multiply table capacities by the following factors for other
condensing temperatures.
Condensing
Temperature (°C)
Suction Line Discharge Line
20 1.202 0.605
30 1.103 0.845
40 1.000 1.000
50 0.891 1.133
Notes for Table 37 :
1. Table Capacities are in kilowatts of refrigeration.
2. ∆p = pressure drop per unit equivalent length of line, Pa/m
3. ∆t = corresponding change in saturation temperature, K/m
4. Line capacity for other saturation temperatures ∆ t and
equivalent lengths L
e
5. Saturation temperatures ∆ T for other capacities and
equivalent lengths L
e
Line Capacity = Table Capacity
Table L
e
Actual L
e
Actual ∆ t
Table ∆ t
0.55
R-22 Sizing — Notes
×
∆t = Table ∆t
Actual L
e
Table L
e
Actual Capacity
Table Capacity
1.8
×
Line Capacity = Table Capacity
Table L
e
Actual L
e
Actual ∆ t
Table ∆ t
0.55
R-22 Sizing — Notes
×
∆t = Table ∆t
Actual L
e
Table L
e
Actual Capacity
Table Capacity
1.8
×