Daikin R22, Руководство по проектированию трубопроводов для хладагента, Страница: 43 / 78

www.DaikinApplied.com 43 AG 31-011 • REFRIGERANT PIPING DESIGN
Table 8: R-134a Refrigerant Line Size (Tons)
Suction Discharge Liquid
SST 0°F 20°F 40°F 0°F 20°F 40°F
∆T 2°F 1°F 0 .5°F 2°F 1°F 0 .5°F 2°F 1°F 0 .5°F 1°F 1°F 1°F
vel =
100 fpm
1°F
∆p (PSI) 1 .00 0 .50 0 .25 1 .41 0 .71 0 .35 1 .93 0 .97 0 .48 2 .20 2 .20 2 .20 2 .20
OD (in .)
1/2 0.14 0.10 0.07 0.23 0.16 0.11 0.35 0.24 0.16 0.5 0.6 0.6 2.13 2.79
5/8 0.27 0.18 0.12 0.43 0.29 0.20 0.66 0.45 0.31 1.0 1.1 1.1 3.42 5.27
7/8 0.71 0.48 0.33 1.14 0.78 0.53 1.75 1.20 0.82 2.7 2.8 2.9 7.09 14
1-1/8 1.45 0.99 0.67 2.32 1.59 1.08 3.54 2.43 1.66 5.4 5.7 6.0 12.1 28.4
1-3/8 2.53 1.73 1.18 4.04 2.77 1.89 6.17 4.25 2.91 9.4 9.9 10.4 18.4 50
1-5/8 4.02 2.75 1.88 6.39 4.40 3.01 9.77 6.72 4.61 14.9 15.7 16.4 26.1 78.6
2-1/8 8.34 5.73 3.92 13.3 9.14 6.27 20.20 14.0 9.59 30.8 32.4 34.0 45.3 163
2-5/8 14.80 10.2 6.97 23.5 16.2 11.1 35.80 24.7 17.0 54.4 57.2 59.9 69.9 290
3-1/8 23.70 16.2 11.1 37.5 25.9 17.8 57.10 39.4 27.2 86.7 91.2 95.5 100 462
3-5/8 35.10 24.2 16.6 55.8 38.5 26.5 84.80 58.7 40.4 129.0 135. 142.0 135 688
4-1/8 49.60 34.2 23.5 78.7 54.3 37.4 119.4 82.6 57.1 181.0 191. 200.0 175 971
5-1/8 88.90 61.3 42.2 141.0 97.2 67.1 213.0 148. 102. 323.0 340. 356.0 — —
6-1/8 143.0 98.8 68.0 226.0 157. 108. 342.0 237. 165. 518.0 545. 571.0 — —
ASHRAE Handbook Refrigeration, Chapter 2, 2006.
© American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc., www.ashrae.org
Values in Table 8 are based on 105°F condensing temperature. Multiply table capacities by the following factors for other
condensing temperatures.
Condensing
Temperature (°F)
Suction Line Discharge Line
80 1.158 0.804
90 1.095 0.882
100 1.032 0.961
110 0.968 1.026
120 0.902 1.078
130 0.834 1.156
Notes for Table 8 :
1. Table capacities are in tons of refrigeration.
2. ∆p = pressure drop due to line friction, psi per 100 ft of
equivalent line length
3. ∆t = corresponding change in saturation temperature,
°F per 100 ft
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
×