Nano-enhanced refrigerant is one of the promising heat transfer fluids in refrigeration systems. It has the capability to boost the efficiency of vapour compression refrigeration and air conditioning systems. In heat transfer application, the density of the fluid plays a crucial role in identifying various heat transfer characteristics such as the Reynolds number, Nusselt number, the friction factor and the pressure loss. Compared to thermal conductivity and viscosity, determining the density of nanofluids has received very less attention in research. The liquid and vapour densities of alumina (Al2O3), titanium dioxide (TiO2) and cupric oxide (CuO) nanoparticles suspended in 2,3,3,3-tetrafluoropropene (R1234yf) are investigated in this study. The Pak and Cho model was adopted to examine the densities of nano-refrigerants as the volume concentration of particles in the base refrigerant and temperature varies from 1% to 5% and 273 to 323 K respectively. The models are validated using the experimental studies conducted by various researchers on different nano-refrigerants. The analysis results indicated that the liquid and vapour densities of CuO/R1234yf nano-refrigerant are 10.3% and 62.93% greater than that of Al2O3/R1234yf at 5% particle concentration. From the liquid and vapour density point of view, the CuO/R1234yf nano-refrigerant is superior over Al2O3/R1234yf and TiO2/R1234yf. Results also indicated that at 308 K the liquid phase density of CuO added with R1234yf nano-refrigerant is higher by 12.99% and 8.65% than R134a and R141b respectively. Hence CuO/R1234yf significantly enhances the performance of refrigeration systems.
BibinBSGundabattiniE. Properties and performance of eco-friendly hydro-fluoro-olefin (HFO) refrigerant-R1234yf: Part I. Int J Air Cond Refrig2021; 29(03): 2130005.
2.
GulTNasirSIslamS, et al. Effective Prandtl number model influences on the γAl2O3-H2O and γAl2O3-C2H6O2 nanofluids spray along a stretching cylinder. Arab J Sci Eng2019; 44(2): 1601–1616.
3.
KhanAGulTZaheerZ, et al. The flow of ferromagnetic nanofluid over an extending surface under the effect of operative Prandtl model: a numerical study. Adv Mech Eng2019; 11(12): 168781401989612.
4.
GulTWaqasMNomanW, et al. The carbon-nanotube nanofluid sprayed on an unsteady stretching cylinder together with entropy generation. Adv Mech Eng2019; 11(12): 168781401989445.
5.
HosseinzadehSHosseinzadehKHasibiA, et al. Thermal analysis of moving porous fin wetted by hybrid nanofluid with trapezoidal, concave parabolic and convex cross sections. Case Stud Therm Eng2022; 30: 101757.
6.
AlzahraniAKUllahMZAlshomraniAS, et al. Hybrid nanofluid flow in a Darcy-Forchheimer permeable medium over a flat plate due to solar radiation. Case Stud Therm Eng2021; 26: 100955.
7.
Talebi RostamiHFallah NajafabadiMHosseinzadehK, et al. Investigation of mixture-based dusty hybrid nanofluid flow in porous media affected by magnetic field using RBF method. Int J Ambient Energy. Epub ahead of print 13January2022. DOI: 10.1080/01430750.2021.2023041.
8.
GulTAliBAlghamdiW, et al. Mixed convection stagnation point flow of the blood based hybrid nanofluid around a rotating sphere. Sci Rep2021; 11(1): 7460.
9.
GulTQadeerAAlghamdiW, et al. Irreversibility analysis of the couple stress hybrid nanofluid flow under the effect of electromagnetic field. Int J Numer Methods Heat Fluid Flow2022; 32(2): 642–659.
10.
HosseinzadehSHosseinzadehKHasibiA, et al. Hydrothermal analysis on non-Newtonian nanofluid flow of blood through porous vessels. Proc Inst Mech Eng E: J Process Mech Eng. Epub ahead of print 13January2022. DOI: 10.1177/09544089211069211.
11.
SaeedAKhanNGulT, et al. The flow of blood-based hybrid nanofluids with couple stresses by the convergent and divergent channel for the applications of drug delivery. Molecules2021; 26(21): 6330.
12.
AlawiOASidikNACMohammedHA. A comprehensive review of fundamentals, preparation and applications of nanorefrigerants. Int Commun Heat Mass Transf2014; 54:81–95.
13.
WangRHaoBXieGZ, et al. A refrigerating system using Hfc134a and mineral lubricant appended with N-TiO2 (R) as working fluids. In: Proceedings of the 4th international symposium on heating ventilating and air conditioning, ISHVAC, Beijing, 2003.
14.
JiangWDingGPengH. Measurement and model on thermal conductivities of carbon nanotube nanorefrigerants. Int J Therm Sci2009; 48(6): 1108–1115.
15.
LeeKHwangYCheongS, et al. Performance evaluation of nano-lubricants of fullerene nanoparticles in refrigeration mineral oil. Curr Appl Phys2009; 9(2): e128–e131.
16.
BiSSShiLZhangLL. Application of nanoparticles in domestic refrigerators. Appl Therm Eng2008; 28(14–15): 1834–1843.
17.
MahbubulIMFadhilahSASaidurR, et al. Thermophysical properties and heat transfer performance of Al2O3/R-134a nanorefrigerants. Int J Heat Mass Transf2013; 57(1): 100–108.
18.
Ould DidiMBKattanNThomeJR. Prediction of two-phase pressure gradients of refrigerants in horizontal tubes. Int J Refrig2002; 25(7): 935–947.
19.
MahbubulIMSaadahASaidurR, et al. Thermal performance analysis of Al2O3/R-134a nanorefrigerant. Int J Heat Mass Transf2015; 85:1034–1040.
20.
NairVParekhADTailorPR. Experimental investigation of a vapour compression refrigeration system using R134a/nano-oil mixture. Int J Refrig2020; 112: 21–36.
21.
ParkashJSainiSKohliA, et al. Comparative analysis of thermohydraulic properties of nano-refrigerants. Int J Eng Technol2018; 7(4): 34.
22.
MaheshwaryPBHandaCCNemadeKR. Effect of shape on thermophysical and heat transfer properties of zno/R-134a nanorefrigerant. Mater Today Proc2018; 5(1): 1635–1639.
23.
AlawiOASidikNAC. Influence of particle concentration and temperature on the thermophysical properties of cuo/R134a nanorefrigerant. Int Commun Heat Mass Transf2014; 58:79–84.
24.
ChauhanSSKumarRRajputSPS. Performance investigation of ice plant working with r134a and different concentrations of POE/TiO2 nanolubricant using experimental method. J Braz Soc Mech Sci Eng2019; 41(4): 163.
25.
AhmadpourMMAkhavan-BehabadiMASajadiB, et al. Experimental study of R600a/oil/MWCNT nano-refrigerant condensing flow inside micro-fin tubes. Heat Mass Transf2020; 56(3): 749–757.
26.
YangDSunBLiH, et al. Experimental study on the heat transfer and flow characteristics of nanorefrigerants inside a corrugated tube. Int J Refrig2015; 56:213–223.
27.
AlawiOASalihJMMallahAR. Thermo-physical properties effectiveness on the coefficient of performance of Al2O3/R141b nano-refrigerant. Int Commun Heat Mass Transf2019; 103:54–61.
28.
MahbubulIMSaidurRAmalinaMA. Thermal conductivity, viscosity and density of r141b refrigerant based nanofluid. Procedia Eng2013; 56:310–315.
29.
BhatMWVyasGJaffriAJ, et al. Investigation on the thermophysical properties of Al2O3, Cu and SiC based nano-refrigerants. Mater Today Proc2018; 5(14): 27820–27827.
30.
JaffriAJDondapatiRSBhatMW, et al. Investigation on thermo-physical properties of mixed nano-refrigerant with CuO based nanoparticles. Mater Today Proc2018; 5(14): 27795–27800.
31.
GhasemiBAminossadatiSM. Brownian motion of nanoparticles in a triangular enclosure with natural convection. Int J Therm Sci2010; 49(6): 931–940.
32.
EidEIKhalaf-AllahRATaherSH, et al. An experimental investigation of the effect of the addition of nano aluminum oxide on pool boiling of refrigerant 134A. Heat Mass Transf2017; 53(8): 2597–2607.
33.
SaidZSaidurRHepbasliA, et al. New thermophysical properties of water based TiO2 nanofluid: the hysteresis phenomenon revisited. Int Commun Heat Mass Transf2014; 58:85–95.
34.
Akhavan-BehabadiMASadoughiMKDarziM, et al. Experimental study on heat transfer characteristics of R600a/POE/CuO nano-refrigerant flow condensation. Exp Therm Fluid Sci2015; 66:46–52.
35.
WangC-C. An overview for the heat transfer performance of HFO-1234yf. Renew Sustain Energ Rev2013; 19:444–453.
36.
GulTFirdousK. The experimental study to examine the stable dispersion of the graphene nanoparticles and to look at the GO–H2O nanofluid flow between two rotating disks. Appl Nanosci2018; 8(7): 1711–1727.
37.
LemmonEWHuberMLMcLindenMO. NIST reference fluid thermodynamic and transport properties–REFPROP. NIST Standard Reference Database 2002, V7, vol. 23.
