Analysis and optimization of a dual-load vapor compression cycle using non-azeotropic refrigerant mixtures

Some Non-Azeotropic Refrigerant Mixtures (NARMs) have been identified as potential replacements for R12 because of their low ozone depletion potential, low global warming potential and promising thermodynamic characteristics which could improve cycle efficiency. A NARM experiences a variable temperature glide during a constant-pressure phase change process, making it a logical candidate for the two-temperature level cooling found in refrigerators. There are two fundamental thermodynamic benefits to using a NARM over a pure refrigerant: (1) mixture and air-temperature glides can be better matched to improve the system performance, and (2) lower refrigerant temperatures can be achieved through the use of intercooling with no decrease in evaporating pressure. The objective of this research was to investigate optimal pure refrigerant (R12 and R134a) and NARM (65% R22/35% R123 and 80% R22/20% R141b) refrigerator system configurations that minimized life-cycle cost.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mechanical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Smith, Mark Kennedy

Contributors dc:contributor

• Newell, Ty A.

• Engineering, Mechanical

Statement dc:rights

• Copyright 1994 Smith, Mark Kennedy

Language dc:language

eng

Identifier

AAI9416436
(UMI)AAI9416436

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/21225