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332 Applied Process Design for Chemical and Petrochemical Plants

Table 11-12
Comparison of Evaporator Temperature and Pressure for Common Refrigerants
Pressure, psia
Evaporator
Temp., F 160 140 100 80 60 40 30 20 10 0 5 10 20 30 40
o
Ammonia 1.24 2.74 5.55 10.41 13.90 18.30 23.74 30.42 34.27 38.51 48.21 59.74 73.32
Ethane* 50. 78. 113. 135.8 160. 186. 220. 235. 260. 290. 338. 388.
Ethylene 22.4 210.4
Propane 5.65 9.72 16.2 20.3 25.4 31.4 38.2 41.9 46.0 55.5 66.3 78.0
Propylene 3.85 7.21 12.6 20.6 25.8 32.1 39.4 47.9 52.6 57.7 68.9 81.7 96.3
N-Butane 5.67 7.30 8.2 9.2 11.6 14.4 17.7
Iso-Butane 6.08 7.50 9.28 11.6 13.1 14.6 18.2 22.3 26.9
R-11 1.42 1.92 2.56 2.93 3.34 4.34 5.56 7.03
R-12 2.88 5.36 9.3 11.99 15.26 19.19 23.84 26.48 29.35 35.73 43.14 51.67
R-13 3.10 6.45 22.2 36.9 58.1 87.4 105.6 126.4 150.1 176.8 206.8 240.4 277.9 319.6
R-21 1.36 1.89 2.58 3.46 4.58 5.24 5.97 7.69 9.79 12.32
R-22 0.43 2.38 4.78 8.86 15.3 19.7 25.0 31.3 38.8 43.0 47.6 57.98 69.93 83.72
R-113 0.84 0.98 1.14 1.53 2.03 2.65
R-114 1.87 2.56 3.44 4.56 5.96 6.77 7.67 9.75 12.25 15.22
Methyl chloride 1.95 3.79 6.9 9.0 11.7 14.96 18.9 21.15 23.6 29.1 35.7 43.33
Methylene chloride 1.38 1.92 2.56 3.38
Sulfur dioxide 3.14 4.33 5.88 7.86 10.35 11.81 13.42 17.18 21.70 27.1
Carbon dioxide 94.7 145.8 177.9 215.0 257.4 305.7 360.4 421.8 490.6 567.3
th
All values from Section 32, Air Conditioning Refrigerating Data Book, 10 Ed., ASHRAE (1957) except
R-11 Trichloromonofluoromethane R-22 Monochlorodifluoromethane
R-12 Dichlorodifluoromethane R-113 Trichlorotrifluoroethane
R-13 Monochlorotrifluoromethane R-114 Dichlorotetrafluoroethane
R-21 Dichloromonofluoromethane
* Approximate value.
These refrigerants already have been or are being phased out of industrial usage; therefore, the values have no current significance.
th
Used by permission: Air Conditioning Refrigerating Data Book, 10 Ed., Section 32, ©1957. American Society of Heating, Refrigerating, and Air Conditioning Engineers, Inc.
All rights reserved.
Table 11-13
Physical Property Study of Various Refrigerants

Datum Plane: 0°F Suction, 110°F Condensing a
(K)
(J) Min. Recom-
Min. Recom mended
(H) (I) mended Sat. Suction
(B) (F) Approx. Approx. Sat. Suction Temp. on
(A) Boiling (C) (D) (E) Flow (G) Min. No. of Temp. on Multi-Stage
Pressure Point Com- Mole- Adiabatic Rate Flow Tons, Stages Single-Stage Reciprocat-
in psia at 14.7 pression cular Head, lb/min/ Rate Centri- Centri- Recipro- ing/Centri
Refrigerants 0°F 110° F psia, °F Ratio Weight ft b ton cfm/TR fugal c fugal cating c fugal c
Ammonia 30.42 247 28 8.12 17.03 107,800 .446 4.07 700 11 03 090
Propylene 48 258 53.86 5.48 42.08 48,600 1.825 4.11 600 6 20 125
Propane 38.2 212 43.73 5.55 44.09 25,100 1.91 5.17 400 4 20 125
Refrigerant 22 38.8 243.4 41.4 6.29 86.48 14,800 3.3 4.54 400 3 16 125
Refrigerant 12 23.8 151.1 21.6 6.34 120.93 11,050 4.57 7.35 250 3 15 125
Refrigerant 114 5.96 54.4 38.4 9.12 170.9 11,900 5.46 26.0 100 3 e0 0
Refrigerant 11 2.55 28.1 74.8 11.1 137.38 13,200 3.24 45.2 50 3 e0 20
Refrigerant 113 0.838 12.76 117.6 15.2 187.39 12,850 4.2 131.4 20 3 e0 40
Note: Based on no intermediate flashing or subcooling of liquid.
a
b For approximation, polytropic head used in actual design.
c Based on 2,000—3,000 cfm at suction conditions as minimum for efficient selection. This is approximate only. Columns (J) and (K) are not referring to the 0°F and
110°F conditions.
d Refrigerant number of column one corresponds to the A.S.R.E. standard designation, which agrees with previous designations for the chloro-fluoro hydrocarbon
type refrigerants.
e Generally not recommended for reciprocating compressors.
Used by permission: Peard, R. Private communication, June 1959. York Corp., Houston, Texas.