scholarly journals EVALUATION OF A REFRIGERATION SYSTEM BASED ON NANO-REFRIGERANTS AND NANO LUBRICANT

2021 ◽  
Vol 20 (2) ◽  
pp. 93-111
Author(s):  
HudaElslam A. S. Mohamed ◽  
Unal Camdali
Keyword(s):  
Refrigeration System ◽  
Nano Lubricant

scholarly journals Research on Nano Refrigerant and Nano Lubricant to Improve Energy Saving of Refrigeration System

2021 ◽  
Vol 2093 (1) ◽  
pp. 012016
Author(s):  
Dexia Kong ◽  
Na Wei ◽  
Min Dong
Keyword(s):  
Heat Transfer ◽  
Tribological Properties ◽  
Nano Particles ◽  
Lubricating Oil ◽  
Vapor Compression ◽  
Refrigeration System ◽  
Factors Affecting ◽  
Nano Lubricant ◽  
Overall Performance ◽  
Physical Phenomena

Abstract In order to improve the performance of the refrigeration system, researchers have introduced nano-refrigerant and nano-lubricating oil into the latest development of airconditioning system. However, explaining the role of nano-particles based on the physical phenomena affecting the vapor compression refrigeration system (VCRS) has been limited in experiments. Therefore, this paper reviews the mechanism of using nano-refrigerant and nano-lubricating oil to improve the performance of VCRS, discusses the compression work of the refrigeration system using nano-refrigerant and nano-lubricating oil and VCRS performance parameters such as COP and COF, and relates them to the overall performance of the system. The results show that the main factors affecting the performance of VCRS are heat transfer enhancement, refinement of the characteristics of cold oil mixture and improvement of tribological properties. The influence of nano-refrigerant and nano-lubricating oil on heat transfer, cold oil mixture and tribological properties of VCRS improves the overall performance of VCRS. Therefore, nano-refrigerant and nano-lubricant are expected to be the best choice to improve the efficiency of VCRS.

scholarly journals Energy and exergy analysis of vapour compression refrigeration system using selected eco-friendly hydrocarbon refrigerants enhanced with tio2-nanoparticle

2017 ◽  
Vol 6 (4) ◽  
pp. 91 ◽  
Author(s):  
Luke Ajuka ◽  
Moradeyo Odunfa ◽  
Olayinka Ohunakin ◽  
Miracle Oyewola
Keyword(s):  
Power Consumption ◽  
Exergy Analysis ◽  
Capillary Tube ◽  
Coefficient Of Performance ◽  
Refrigeration System ◽  
Exergetic Efficiency ◽  
Evaporator Temperature ◽  
Energy And Exergy ◽  
Nano Lubricant ◽  
Energy And Exergy Analysis

The experimental study investigated the energy and exergy performance of a domestic refrigerator using eco-friendly hydrocarbon refrigerants R600a and LPG (R290/R600a: 50%/50%) at 0, 0.05, 0.15 and 0.3wt % concentrations of 15nm particle size of TiO2 nano-lubricant, and R134a. The effects of evaporator temperature on power consumption, coefficients of performance, exergetic efficiency and efficiency defects in the compressor, condenser, capillary tube and evaporator of the system were examined. The results showed that LPG + TiO2 (0.15wt %) and R600a + TiO2 (0. 15wt %) had the best of performances with an average of 27.6% and 14.3% higher coefficient of Performance, 34.6% and 35.15% lower power consumption, 13.8% and 17.53% higher exergetic efficiency, a total exergetic defect of 45.8% and 64.7% lower compared to R134a. The exergetic defects in the evaporator, compressor, condenser, and capillary tube were 38.27% and 35.5%, 49.19% and 55.56%, 29.7% and 33.7%, 39.1% and 73.8% lower in the system when compared to R134a respectively. Generally, the refrigerants with nano-lubricant mixture gave better results with an appreciable reduction in the exergy defect in the compressor than the pure refrigerants, and LPG + TiO2 (0. 15wt %) gave the best result in the refrigeration system based on energy and exergy analysis.

Analysis and Feasibilty of Nano-Lubricant in Vapour Compression Refrigeration System

2018 ◽  
Vol 5 (9) ◽  
pp. 20580-20587 ◽  
Author(s):  
R. Santhana Krishnan ◽  
M. Arulprakasajothi ◽  
K. Logesh ◽  
N. Dilip Raja ◽  
Mycherla Rajendra
Keyword(s):  
Refrigeration System ◽  
Nano Lubricant ◽  
Vapour Compression

A review on the utilization of nanoparticles in the refrigeration system as nano-refrigerant and nano-lubricant

2021 ◽  
Author(s):  
J. Vamshi ◽  
K.M. Anand ◽  
Archiman Sharma ◽  
Aditya Kumar ◽  
Sandeep Kumar ◽  
...  
Keyword(s):  
Refrigeration System ◽  
Nano Lubricant

scholarly journals Preparation and Performance Analysis of Graphite Nanoparticle in Domestic Refrigerator

2021 ◽  
pp. 286-294
Author(s):  
Vijay Kumar Maurya ◽  
Mayank Arya ◽  
Awnish Kumar Tripathi
Keyword(s):  
Volume Concentration ◽  
Layer Structure ◽  
Refrigeration System ◽  
Energy Usage ◽  
Domestic Refrigerator ◽  
Graphite Nanoparticles ◽  
Nano Lubricant ◽  
And Performance ◽  
Friction Surfaces ◽  
Nano Fluids

This article examines experimentally the performance of domestic refrigerators with isobutene (R600a) and graphite nano-lubricants as working fluids. Graphene has an extremely thin layer structure that fills the friction surfaces and reduces friction losses quickly. However, there is a lower coefficient of friction (COF) and higher thermal conductivity of nano-fluids generated using graphite in the base fluid. The graphite nanoparticles modified in the surface are verified to continuously suspend for a long period of time in the form of clusters. The refrigeration test examined the application of the graphite nano-lubricants in the domestic refrigerator with a volume concentration of 0.1%, 0.3%, and 0.5%. The findings show that nano-refrigerants in the refrigeration system work safely and normally. And also compressor and refrigerator output have been analyzed. Moreover, refrigerator energy usage decreased by 15.26%, 17.10%, and 21.16% with graphite nano-lubricant as a concentration of 0.1%, 0.3% and 0.5%, respectively.

scholarly journals Effect of Addition of Different Mass Fractions of CuO Nano Particles in Compressor oil upon COP of the Refrigeration System

2019 ◽  
Vol 8 (3) ◽  
pp. 3732-3736
Keyword(s):  
Heat Transfer ◽  
High Surface ◽  
High Surface Area ◽  
Nano Particles ◽  
Refrigeration System ◽  
Performance Study ◽  
Mass Fractions ◽  
Nano Lubricant ◽  
Liquid Suspensions ◽  
Solid Liquid

Nano fluids are produced by mixing particles of nano dimensions in the standard fluids. Thermal conductivities of the nanofluids are higher than that of the base fluids. These are the properties which makes nanofluids unique and superior to normal solid liquid suspensions. i) heat transfer between the particles and fluid is higher due to the high surface area of the particles ii) enhanced dispersion stability with pre-eminent Brownian motion iii) particle clogging is minimized iv) Power required for pumping is less as compared to the base fluid for proportionate heat transfer. In this project Cu0 nanoparticles of size 20nm-50nm has been used as Nano lubricant for performance study of Refrigeration test rig. CuO nanoparticles are mixed in POE oil (Compressor oil) to form the nanolubricant. The nanolubricant so formed is further stabilized by Ultrasonic agitation. Nano lubricants with specific mass fractions 0.30%, 0.70%, 1.05%, 1.4% are added in the compressor oil and the experimentation is carried out which shows significant improvement in the performance of refrigeration system. Compressor work is reduced and consequently COP of refrigeration system is improved.

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