Page 366 - Applied Process Design For Chemical And Petrochemical Plants Volume III

66131_Ludwig_CH11A 5/30/2001 4:50 PM Page 323

Refrigeration Systems 323

Table 11-6 (continued)
®
Genetron CFC and HCFC Types of Refrigerants Indicating Substitution “Phasing-Out” of Selected Compounds
with Newer Replacement Compounds
Tetrafluoroethane Dichlorodifluoro- Chlorodifluoro- Azeotrope Chlorodifluoro- Chlorodifluo- Chlorodifluoro-
(CF 3 CH 2 F) methane (CCl 2 F 2 ) methane (CCl 2 F 2 /CH 3 CHF 2 ) methane Difluoro- romethane methane (CHClF 2 )
A refrigerant to A widely used refrig- Difluoroethane An azeotropic mix- ethane Chlorotetra- Chlorotetrafluo- As a refrigerant,
replace CFC-12 in erant in reciprocat- Chlorotetrafluoro- ture that has slightly fluoroethane roethane Chlorodi- operates with higher
auto air condition- ing and rotary type ethane (CHClF 2 / higher vapor pres- (CHClF 2/ CH 3 CHF 2 / fluoroethane system pressures but
ing and in residen- equipment and in CH 3 CHF 2 / sures and provides CHClFCF 3 ) (CHClF 2 /CF 3 CHClF low compressor dis-
tial, commercial, some centrifugal CHClFCF 3 ) higher capacities An interim replace- /CH 3 CClF 2 ) placement. Popular
and industrial designs. Also used An interim replace- from the same com- ment for CFC-12 in An interim replace- in residential, com-
refrigeration sys- as a diluent in a ment for CFC-12 pressor displace- low-temperature ment for CFC-12 in mercial, and indus-
tems. Also used as a sterilant gas and as in medium- ment. commercial refriger- refrigeration sys- trial applications.
blowing agent in a blowing agent in temperature ation systems. Con- tems. Contains Also used as an inter-
rigid foam insula- rigid foam applica- commercial refrig- tains HCFC-22/ HCFC-22/ mediate to produce
tion. tions. eration systems. HFC-152a/ HCFC-124/ fluoropolymers and
Contains HCFC-22/ HCFC-124. HCFC-142b. as a blowing agent in
HFC-152a/ rigid foam applica-
HCFC-124. tions.

HFC CFC Blend Azeotrope Blend Blend HCFC
134a 12 MP39 500 MP66 409A 22

R-134a R-12 R-401A R-500 R-401B R-409A R-22
102.03 120.9 94.4 99.3 92.9 97.4 86.5
15.1 21.6 27.7 28.3 30.4 31.6 41.4
141.9 252 — 254 — — 256
214 234 228.7 222 226.4 228.9 205
589.8 597 600.0 642 596.1 673.1 722
74.17 80.7 73.8 71.1 73.7 75.2 73.3
0.34 0.24 0.31 0.30 0.30 0.29 0.31

0.21 0.15 0.17 0.18 0.17 0.17 0.16

None None None None None None None

† A1 A1 A1/A1 A1 A1/A1 A1/A1 A1
NOTE: 500 is an
azeotropic mixture
consisting of
CFC 12 (CCl 2 F 2 ),
73.8% by weight
and HFC 152a
(CH 3 CHF 2 ), 26.2%
by weight.