Soft optimization test results of R-32/R-125/R-134a (10%/70%/20%) compared to R-502
Abstract
Zeotrope R-32/R-125/R-134a (10%/70%/20%) is a long-term, zero ozone depletion potential (ODP) replacement for low-temperature refrigerant R-502. A series of soft optimization tests has been completed comparing the system performance of this blend with that of R-502. The tests were carried out under controlled conditions in a well-instrumented alternative refrigerant test facility using an open-drive reciprocating compressor and counterflow tube-in-tube heat exchangers. Measurements were conducted at two different condensing temperatures -- 54.4 C (130.0 F) and 43.3 C (110.0 F). The refrigerant evaporating temperature was varied over a range from {minus}30.0 C to {minus}15.0 C ({minus}22.0 F to 5.0 F). The refrigerant superheat at the evaporator outlet was maintained at approximately 5.0 C (9.0 F), and the return gas temperature to the compressor was maintained at 18.3 C (65.0 F). The degree of liquid subcooling at the condenser outlet was varied between 60 C and 18.0 C (10.8 F and 32.4 F). Test data were used to compare important compressor performance characteristics including shaft power, pressure ratio, and compressor discharge temperature. System performance characteristics were also measured, including evaporator capacity, refrigerant mass flow, and cooling coefficient of performance (COP). The effect of additional liquid subcooling on the evaporator capacity and COPmore »
- Authors:
-
- National Research Council of Canada, Ottawa, Ontario (Canada). Inst. for Environmental Research and Technology
- Publication Date:
- OSTI Identifier:
- 33275
- Report Number(s):
- CONF-9406105-
Journal ID: ISSN 0001-2505; TRN: IM9518%%96
- Resource Type:
- Conference
- Resource Relation:
- Conference: 1994 American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) annual meeting, Orlando, FL (United States), 25-29 Jun 1994; Other Information: PBD: 1994; Related Information: Is Part Of ASHRAE transactions 1994: Technical and symposium papers. Volume 100, Part 2; PB: 1372 p.
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 54 ENVIRONMENTAL SCIENCES; REFRIGERANTS; MATERIAL SUBSTITUTION; PERFORMANCE TESTING; CHLOROFLUOROCARBONS; REFRIGERATING MACHINERY
Citation Formats
Linton, J W, Snelson, W K, Triebe, A R, and Hearty, P F. Soft optimization test results of R-32/R-125/R-134a (10%/70%/20%) compared to R-502. United States: N. p., 1994.
Web.
Linton, J W, Snelson, W K, Triebe, A R, & Hearty, P F. Soft optimization test results of R-32/R-125/R-134a (10%/70%/20%) compared to R-502. United States.
Linton, J W, Snelson, W K, Triebe, A R, and Hearty, P F. 1994.
"Soft optimization test results of R-32/R-125/R-134a (10%/70%/20%) compared to R-502". United States.
@article{osti_33275,
title = {Soft optimization test results of R-32/R-125/R-134a (10%/70%/20%) compared to R-502},
author = {Linton, J W and Snelson, W K and Triebe, A R and Hearty, P F},
abstractNote = {Zeotrope R-32/R-125/R-134a (10%/70%/20%) is a long-term, zero ozone depletion potential (ODP) replacement for low-temperature refrigerant R-502. A series of soft optimization tests has been completed comparing the system performance of this blend with that of R-502. The tests were carried out under controlled conditions in a well-instrumented alternative refrigerant test facility using an open-drive reciprocating compressor and counterflow tube-in-tube heat exchangers. Measurements were conducted at two different condensing temperatures -- 54.4 C (130.0 F) and 43.3 C (110.0 F). The refrigerant evaporating temperature was varied over a range from {minus}30.0 C to {minus}15.0 C ({minus}22.0 F to 5.0 F). The refrigerant superheat at the evaporator outlet was maintained at approximately 5.0 C (9.0 F), and the return gas temperature to the compressor was maintained at 18.3 C (65.0 F). The degree of liquid subcooling at the condenser outlet was varied between 60 C and 18.0 C (10.8 F and 32.4 F). Test data were used to compare important compressor performance characteristics including shaft power, pressure ratio, and compressor discharge temperature. System performance characteristics were also measured, including evaporator capacity, refrigerant mass flow, and cooling coefficient of performance (COP). The effect of additional liquid subcooling on the evaporator capacity and COP was also evaluated.},
doi = {},
url = {https://www.osti.gov/biblio/33275},
journal = {},
issn = {0001-2505},
number = ,
volume = ,
place = {United States},
year = {Sat Dec 31 00:00:00 EST 1994},
month = {Sat Dec 31 00:00:00 EST 1994}
}