Mechanical sub-cooling vapor compression systems: Current status and future directions

Using mechanical sub-cooling systems to increase COP of vapor compression cycles is a known method in literature to save energy and increase efficiency. Recently, much progress has been made with respect to investigation into its different aspects that can help to put it into practice. Numerical and...

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Bibliographic Details
Published in:International journal of refrigeration 2013-12, Vol.36 (8), p.2097-2110
Main Authors: Qureshi, Bilal Ahmed, Zubair, Syed M.
Format: Article
Language:English
Subjects:
Amélioration de performance
Applied sciences
Compression de vapeur
Energy
Energy. Thermal use of fuels
Exact sciences and technology
Performance improvement
Refrigerants
Refrigerating engineering
Refrigerating engineering. Cryogenics. Food conservation
Refrigeration installations
Refrigeration system
Sous-refroidissement
Subcooling
Systèmes frigorifiques
Techniques. Materials
Vapor compression
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Summary:Using mechanical sub-cooling systems to increase COP of vapor compression cycles is a known method in literature to save energy and increase efficiency. Recently, much progress has been made with respect to investigation into its different aspects that can help to put it into practice. Numerical and experimental works are considered for the purpose of highlighting this progress. These can be categorized as: a) simulation of performance characteristics resulting from different refrigerant combinations in dedicated mechanical sub-cooling systems, b) variation in performance characteristics for a vapor compression cycle using integrated mechanical sub-cooling because of fouling, c) experimental study about consequences of employing a dedicated mechanical subcooling cycle with a simple vapor compression system, and d) experimental investigation about consequences of employing a subcooler in a two-stage refrigeration cycle. Some important results are discussed. Finally, some suggestions are made to provide direction into future research in this area to help put it into practice. •Recent progress with respect to mechanical sub-cooling systems is examined.•Both theoretical and experimental studies are reviewed.•Important results with respect to performance characteristics and reduced maintenance are examined.•Potential for these systems for energy conservation is substantial.•Future directions to help put these systems in practice are also outlined.
ISSN:0140-7007
1879-2081
DOI:10.1016/j.ijrefrig.2013.07.026