Page 365 - Applied Process Design For Chemical And Petrochemical Plants Volume III

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322 Applied Process Design for Chemical and Petrochemical Plants

Table 11-6
®
Genetron CFC and HCFC Types of Refrigerants Indicating Substitution “Phasing-Out” of Selected Compounds
with Newer Replacement Compounds

Trichlorotrifluoro- Dichlorofluoro- Dichlorotrifluoro- Trichlorofluoro- Dichlorotetra- Difluorochloro- Chlorotetrafluoro-
ethane (C 2 Cl 3 F 3 ) ethane (CCl 2 FCH 3 ) ethane methane (CCl 3 F) fluoroethane ethane (CH 3 CClF 2 ) ethane (CHClFCF 3 )
Used in low capacity The leading substi- (CHCl 2 CF 3 ) A blowing agent for (C 2 Cl 2 F 4 ) An effective replace- A potential medium
centrifugal chiller tute blowing agent A very low ozone rigid foam insula- Intermediate in ment for CFC-12 in pressure refrigerant
packaged units. for CFC-11 in rigid depleting com- tion applications pressure and rigid polyurethane, for chiller applica-
Operates with very foam insulation pound that serves as such as construction displacement. Prin- polystyrene, and tions. It is designed
low system pres- applications such as: a replacement for (commercial, resi- cipally used with polyethylene foam to replace CFC-12 as
sures, high gas vol- construction (com- CFC-11 in centrifu- dential, and pub- chillers for higher insulation applica- a diluent in steriliz-
umes. Also used as mercial, residential, gal chillers. lic), appliances, and capacities or for tions. Uses include ing gas. A potential
an intermediate in and public), appli- transport vehicles. lower evaporator both residential and replacement for
the manufacture of ances, and transport Refrigerant for cen- temperature commercial con- CFC-11 and -12 in
specialty lubricants. vehicles. trifugal chillers. process type struction and rigid foam insula-
applications. process piping. tion applications.

Selected CFC HCFC HCFC CFC CFC HCFC HCFC
Physical Data 113 141b 123 11 114 142b 124
Substitutes (see legend)
ASHRAE number R-113 R-141b R-123 R-11 R-114 R-142b R-124
Molecular weight 187.4 116.95 152.91 137.4 170.9 100.5 136.5
Boiling point @ 1 atm, (°F) 117.6 89.7 82.2 74.9 38.8 14.4 10.3
Freezing point @ 1 atm, (°F) 31 154.3 160.6 168 137 204.4 326
Critical temperature (°F) 417 410.4 363.2 388 294 278.8 252
Critical pressure (psia) 499 673.0 533.1 640 473 598 525
Saturated liquid density
3
@ 86°F, (lb/ft ) 96.8 76.31 90.41 91.4 89.8 68.48 83.6
Specific heat of liquid
@ 86°F, (Btu/lb•°F)* 0.22 0.28 0.24 0.21 0.24 0.32 0.27
Specific heat of vapor @
constant pressure* (Cp),
@ 86°F and 1 atm,
(Btu/lb•°F) 0.15 1 0.18 1 0.17 0.14 0.17 0.199 0.17
Flammable range, % vol in
air (based on ASHRAE
Standard 34 with match
ignition)†† None 7.6 17.7† None None None 7.1 18.6† None
ANSI/ASHRAE Standard
34-1992 safety group
classifications A1 N.C.††† B1 A1 A1 A2 N.C.†††
1 @ 0.2 atm 1 @ 0.2 atm
pressure pressure

*Preliminary information based on estimated properties.
LEGEND: : Bubble point temperature.
†: Upper and lower vapor flammability (vol %).
CFC 11 Substitutes
CFC 12 Substitutes ††: ASTM E681-85 match ignition ambient conditions.
R-502 Substitutes †††:N.C. not classified.
CFC 13/R-503 Substitutes : @ 30°F.
HCFC 22 Substitutes

Used by permission: Bul. G525-001, ©1998. AlliedSignal, Inc., Speciality Chemicals .
®
(Continued on pages through 325)