Investigation on the Performance of Domestic Refrigerator with Zirconium Oxide‐R134a Nanorefrigerant

Abstract

This study investigates the performance of nanorefrigerants (R134a-ZrO2) in a domestic refrigerator at a concentration of 0.2 g/l without changing the components. Nanoparticles of ZrO2 of 0.2 g/L concentration with particle size 1-10 nm and 140 g of R134a have been charged, and investigations were carried out. Energy consumption and pull-down tests were conducted to investigate the performance of the refrigerator. The performance parameters like refrigeration capacity, compressor power, discharge temperature, coefficient of performance, and energy consumption were investigated for the nanorefrigerant (R134a-ZrO2), and the results were compared with base refrigerant R134a. The pull downtime, energy consumption, and discharge temperature are reduced with increased COP and compressor power when the system is operated with R134a-ZrO2 nanorefrigerant. Also, the thermophysical properties of the nanorefrigerant (R134a-ZrO2) are calculated and analyzed for the various volume fraction of nanoparticles.

Heat Transfer Enhancement Using Different Nanofluid Materials in the Vapor Compression Refrigeration Systems

“…[7] the results showed that using a standard condenser with a 1:1 ratio of nano particles and each 2 gm of Cerium Oxide (CeO2) and Zinc Oxide (ZnO) in the experiment, the real COP of a household refrigeration system increased by 33.3%. [8] used R134a-ZrO2 nano refrigerant, the system's energy consumption was reduced due to higher COP and compressor power. [9] found that freezing capacity and power consumption both increased, and the power consumption decreased by 25%.…”

“…e= 0.14 -0.11 /(Pr) 0.5 (8) from equation ( 4) to (8) are substituted in equation ( 3) to produce equation ( 9), which deals with the heat flux, Prandtl number, and nano particles concentrations of Al2O3, CuO, ZnO (0.25, 0.35, 0.5, 0.7, 0.9, 1.2) as an input to compare the value of the average heat transfer coefficient, and nano fluid material at constant evaporation pressure h=f (z , q , Pr, nano fluid material) at const p e (9) Equation ( 9) correlated theheat transfer coefficient at different values of heat flux, concentration, Prandtl number, nano fluid material, and finally, a general formula was produced to deal with the heat flux, concentration, Prandtl number for Al2O3, CuO, and ZnO to compare the value of the average heat transfer coefficient, as given by the following equation below.…”

Capacities and irreversibility of the vapour compression refrigeration system’s components using aluminium oxide (Al₂O₃) based nanolubricants

“…The enhanced COP of Cu/Ag alloy was attributed to the higher thermal conductivity, best anti-friction and anti-wear characteristics of Cu/Ag alloy when compared with CuO and pure lubricant. Studying the energy consumption of Zirconium Oxide-R134a nanorefrigerant (ZrO2/R134a), Baskaran et. al.…”