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330 Applied Process Design for Chemical and Petrochemical Plants

Table 11-10
Comparative Refrigerant Performance per Ton of Refrigeration a

Net Refrig- Specific Com- Comp.
Evapo- Con- Refriger- erant Liquid Volume of pressor Power Coeffi- Dis-
Refrigerant
rator denser Com- ating Circu- Circu- Suction Displace- Con- cient of charge
Chemical Name or Pressure, Pressure, pression Effect, lated, lated, Gas, ment, sump- Perfor- Temp.,
3
3
No. Composition (% by mass) psia psia Ratio Btu/lb m lb m /min in. /min ft /lb m cfm tion, hp mance °F
0170 Ethane 236.410 674.710 2.85 69.27 2.88704 289.1266 0.5344 1.543 1.733 2.72 123
0744 Carbon dioxide 332.375 1045.360 3.15 57.75 3.46320 158.5272 0.2639 0.914 1.678 2.81 156
0013B1 Bromotrifluoromethane 77.820 264.128 3.39 28.45 7.02901 129.7814 0.3798 2.669 1.134 4.16 104
0125 Pentafluoroethane 58.870 228.110 3.87 37.69 5.30645 126.8148 0.6281 3.333 1.283 3.67 108
1270 Propylene 52.704 189.440 3.59 123.15 1.62401 90.7048 2.0487 3.327 1.035 4.56 108
0290 Propane 42.37 156.820 3.70 120.30 1.66251 95.0386 2.4589 4.088 1.031 4.57 98
0502 R-22/115 (48.8/51.2) 50.561 191.290 3.78 44.91 4.45305 103.3499 0.8015 3.569 1.067 4.42 98
0022 Chlorodifluoromethane 42.963 172.899 4.02 69.90 2.86144 67.6465 1.2394 3.546 1.011 4.67 128
0717 Ammonia 34.170 168.795 4.94 474.20 0.42177 19.6087 8.1790 3.450 0.989 4.77 210
0500 R-12/152a (73.8/26.2) 31.064 127.504 4.10 60.64 3.29834 80.1925 1.5022 4.955 1.005 4.69 105
0012 Dichlorodifluoromethane 26.505 107.991 4.07 50.25 3.97981 85.2280 1.4649 5.830 0.992 4.75 100
0134a Tetrafluoroethane 23.790 111.630 4.69 64.77 3.08785 71.8199 1.9500 6.021 1.070 4.41 108
0124 Chlorotetrafluoroethane 12.960 64.590 4.98 50.93 3.92696 81.1580 2.7140 10.658 1.054 4.47 90
0600a Isobutane 12.924 59.286 4.59 113.00 1.76991 90.0059 6.4189 11.361 1.070 4.41 80
0600 Butane 8.176 41.191 5.04 125.55 1.59299 77.7772 10.2058 16.258 0.952 4.95 88
0114 Dichlorotetrafluoroethane b 6.747 36.493 5.41 43.02 4.64889 89.5631 4.3400 20.176 1.015 4.65 86
0011 Trichlorofluoromethane 2.937 18.318 6.24 67.21 2.97592 56.2578 12.2400 36.425 0.939 5.02 110
0123 Dichlorotrifluoroethane 2.290 15.900 6.94 61.19 3.26829 62.3495 14.0800 46.018 0.974 4.84 94
0113 Trichlorotrifluoroethane b 1.006 7.884 7.83 52.08 3.84047 68.5997 26.2845 100.945 1.105 4.27 86
a
Based on 5°F evaporation and 86°F condensation.
Saturated suction except R-113 and R-114. Enough superheat was added to give saturated discharge.
b
Used by permission: 1997 ASHRAE Handbook, Fundamentals, I-P Ed., Table 7, p. 18.7, ©1997. American Society of Heating, Refrigerating, and Air-Conditioning Engineers,
Inc. All rights reserved.
Table 11-11
Comparative Refrigerant Performance per Ton at Various Evaporating and Condensing Temperatures

Net Refrig- Specific Com-
Refrigerant Evapo- Con- Refrig- erant Volume of pressor Power
Suction rator denser Com- erating Circu- Suction Displace- Consump-
Chemical Name or Temp., Pressure, Pressure, pression Effect, lated, Gas, ment, tion,
No. Composition (% by mass) o F psia psia Ratio Btu/lb m lb m /min ft 3 /lb m cfm Hp
130 o F Saturated Evaporating, 0 o F Suction Superheat, 40 o F Saturated Condensing
1150 Ethylene 130 30.887 210.670 6.82 142.01 1.40835 3.8529 5.426 1.756
170 Ethane 130 13.620 112.790 8.28 156.58 1.27730 8.3575 10.675 1.633
13 Chlorotrifluoromethane 130 9.059 88.037 9.72 45.82 4.36529 3.6245 15.822 1.685
23 Trifluoromethane 130 9.06 103.03 11.37 79.38 2.51953 5.4580 13.752 1.753
100 o F Saturated Evaporating, 0 o F Suction Superheat, 30 o F Saturated Condensing
170 Ethane 100 31.267 134.730 4.31 157.76 1.26775 3.8671 4.903 1.118
13 Chlorotrifluoromethane 100 22.276 106.290 4.77 46.23 4.32581 1.5631 6.762 1.153
125 Pentafluoroethane 100 3.780 27.760 7.34 56.43 3.54403 8.3900 29.734 1.101
22 Chlorodifluoromethane 100 2.380 19.629 8.25 90.75 2.20397 18.5580 40.901 1.074
23 Trifluoromethane 100 23.74 125.99 5.31 79.37 2.51984 2.219 5.592 1.178
76 o F Saturated Evaporating, 0 o F Suction Superheat, 5 o F Saturated Condensing
1150 Ethylene 76 109.370 416.235 3.81 116.95 1.71021 1.1617 1.987 1.478
170 Ethane 76 54.634 235.440 4.31 322.65 0.61987 2.2906 1.420 0.566
23 Trifluoromethane 76 45.410 237.180 5.22 69.60 2.87356 1.2030 3.457 1.394
13 Chlorotrifluoromethane 76 40.872 192.135 4.70 39.42 5.07389 0.8801 4.465 1.382
13B1 Bromotrifluoromethane 76 13.173 77.820 5.91 37.8 5.29128 2.0329 10.757 1.253
125 Pentafluoroethane 76 8.210 58.870 7.17 50.62 3.95101 4.0720 16.089 1.277
290 Propane 76 6.150 42.367 6.89 147.39 1.35699 14.8560 20.159 1.196
22 Chlorodifluoromethane 76 5.438 42.963 7.90 84.24 2.37425 8.5925 20.401 1.195
717 Ammonia 76 3.18 34.26 10.79 540.63 0.37 75.7838 28.04 1.247
12 Dichlorodifluoromethane 76 3.277 26.501 8.09 58.61 3.41219 10.2448 34.957 1.191
134a Tetrafluoroethane 76 2.3 23.77 10.32 78.1 2.561 17.3038 44.315 1.182
40 o F Saturated Evaporating, 0 o F Suction Superheat, 68 o F Saturated Condensing
744 Carbon dioxide 40 145.770 830.530 5.70 77.22 2.59000 0.6128 1.587 2.208
23 Trifluoromethane 40 103.030 597.900 5.80 45.67 4.37924 0.5448 2.386 2.442
(Continued on page 331)