A critical review on nanorefrigerants: Boiling, condensation and tribological properties

A major amount of domestic energy consumption is spent on refrigeration and space cooling appliances. The performance of the refrigeration system depends on the thermophysical properties of the refrigerant. Altering the properties by additives such as nanoparticles has proven to be an effective solu...

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Bibliographic Details
Published in:International journal of refrigeration 2021-08, Vol.128, p.139-152
Main Authors: R, Praveen Bharathwaj, Shaik, Javeed, Raju, Joe Jones, P, Padmanathan, A, Satheesh
Format: Article
Language:English
Subjects:
Additives
Aluminum oxide
Boiling
Chronologie de l’évolution
Condensation
Condensation phenomenon
Cooling
Copper
Energy consumption
Evolutionary timeline
Gold
Heat transfer
Mechanical properties
Migration de nanoparticule
Migration of nanoparticle
Nanofrigorigène
Nanoparticles
Nanorefrigerant
Performance enhancement
Phénomène de condensation
Pool and flow boiling
Refrigerants
Refrigeration
Residential energy
Silicon dioxide
Silver
Space cooling (buildings)
Swivels
Thermophysical properties
Titanium dioxide
Tribology
Vapor compression refrigeration
Zinc oxide
Ébullition libre et en écoulement
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Summary:A major amount of domestic energy consumption is spent on refrigeration and space cooling appliances. The performance of the refrigeration system depends on the thermophysical properties of the refrigerant. Altering the properties by additives such as nanoparticles has proven to be an effective solution to improve the performance of the system. This work swivels around flow boiling, pool boiling, tribological and condensation characteristics of nanorefrigerants in Vapour Compression Refrigeration System (VCRS) and Vapour Absorption Refrigeration System (VARS). An evolutionary timeline of nanorefrigerants is presented. Energy savings on compressor work by addition of nanolubricants is discussed. A sum of thirteen refrigerants and twelve nanoparticles in various combinations were encountered during this review process. CNTs performed better than metallic (Al, Cu, Au, Ag) and ceramic (Al2O3, TiO2, SiO2, ZnO) counterparts. Majority of the work reported enhancement in heat transfer rate and coefficient of performance (COP), however, few studies presented that CuO nanoparticles have shown negative correlation between HF, COP and volume fraction of nanoparticle. The review presents a broad idea on dispersion techniques, stability, properties of boiling and condensation, migration phenomenon of nanoparticles and various novel techniques to improve the performance of the refrigeration systems.
ISSN:0140-7007
1879-2081
DOI:10.1016/j.ijrefrig.2020.12.027