Page 369 - Applied Process Design For Chemical And Petrochemical Plants Volume III

66131_Ludwig_CH11A 5/30/2001 4:50 PM Page 326

326 Applied Process Design for Chemical and Petrochemical Plants

Table 11-7
Alternate Refrigerants

Low- and Medium-Temperature Commercial Refrigeration
Long-Term Replacements
ASHRAE Trade Name Manufacturer Replaces Type Lubricant a Applications Comments
R-507 AZ-50 AlliedSignal R-502 & Azeotrope Polyol New equipment Close match to
(125/143a) 507 DuPont HCFC-22 ester & retrofits R-502; higher
efficiency than
404A; higher
efficiency than
R-22 at low
temperature.
R-404A 404A AlliedSignal R-502 & Blend Polyol New equipment Close match to
(125/143a/134a) Elf Atochem HCFC-22 (small glide) ester & retrofits R-502; higher
HP62 Dupont efficiency than
R-22 at low
temperature.
R-407D 407D ICI R-500 Blend Polyol New equipment Slightly higher
(32/125/134a) (moderate glide) ester & retrofits capacity.
R-12 Higher
low-temp. capacity.
Low- and Medium-Temperature Commercial Refrigeration
Interim Replacements b
ASHRAE Trade Name Manufacturer Replaces Type Lubricant a Applications Comments
R-402A HP80 AlliedSignal R-502 Blend Alkylbenzene Retrofits Higher discharge
(22/125/290) DuPont (small glide) or polyol pressure than
ester R-502.
R-402B HP81 AlliedSignal R-502 Blend Alkylbenzene Ice Higher discharge
(22/125/290) DuPont (small glide) or polyol machines temperature than
ester R-502.
R-408A 408A AlliedSignal R-502 Blend Alkylbenzene Retrofits Higher discharge
(125/143a/22) Dupont (small glide) or polyol temperature than
Elf Atochem ester R-502.
Very Low Temperature Commercial Refrigeration
Long-Term Replacements
ASHRAE Trade Name Manufacturer Replaces Type Lubricant a Applications Comments
R-23 HFC-23 AlliedSignal R-13 Pure fluid Polyol New equipment Higher discharge
DuPont ester & retrofits temperature than
ICI R-13.
R-508B 508B AlliedSignal R-13 & Azeotrope Polyol New equipment
(23/116) R-503 ester & retrofits
95 DuPont
R-508A 508A ICI R-13 & Azeotrope Polyol New equipment
(23/116) R-503 ester & retrofits
Medium Temperature Commercial Refrigeration Long-Term Replacements
ASHRAE Trade Name Manufacturer Replaces Type Lubricant a Applications Comments

R134a HFC-134a AlliedSignal CFC-12 Pure fluid Polyol New equipment Close match
DuPont ester & retrofits to CFC-12.
Elf Atochem
ICI
Medium-Temperature Commercial Refrigeration Interim Replacements b
ASHRAE Trade Name Manufacturer Replaces Type Lubricant a Applications Comments
R-401A MP39 AlliedSignal CFC-12 Blend Alkylbenzene Retrofits Close to CFC-12
DuPont (moderate or polyol ester Use where
glide) or some cases evap.
mineral oil d temperature
o
–10 F or higher.
(Continued on page 327)