Nanoparticles In Base Fluid Research Articles

Experimental Analysis and CFD Simulation of Photovoltaic/Thermal System with Nanofluids for Sustainable Energy Solution

The integration of photovoltaic/thermal (PV/T) systems with nanofluids presents a promising avenue for enhancing sustainable energy solution. This study investigates the performance of such systems through experimental analysis and computational fluid dynamics (CFD) simulations. Nanofluids, engineered colloidal suspensions of nanoparticles in base fluids, are employed to enhance heat transfer within the PV/T system. The experimental setup involves measuring electrical output, thermal efficiency, and overall system performance under varying conditions. Additionally, CFD simulations are conducted to model fluid flow and heat transfer dynamics within the PV/T collector integrated with nanofluids. The results from both experimental and simulation studies provide insights into the synergitic effects of nanofluids on enhancing energy conversion efficiency and thermal management of the PV/T system. The research contributes to the development of sustainable energy solutions by demonstrating the potential of nanofluid-enhanced PV/T systems in improving energy conversion efficiency and thermal management for various environmental conditions.

Novel 2D Layered MXene Nanofluids for Enhancing the Convective Heat Transfer Performance of Double-Pipe Heat Exchangers.

This paper proposes a new class of novel 2D layered structured materials, such as MXene (MX), for the synthesis of innovative nanofluids as coolants to evaluate the convective heat transfer performance of a double-pipe heat exchanger (DPHE). Convective heat transfer experiments were successfully conducted in lab-scale fabricated DPHE using low-concentration MXene nanofluids by varying the volume concentration of MXene nanoparticles (0.01-0.05 vol %) in different base fluids. The influence of the MXene nanofluids on various convective heat transfer parameters, such as LMTD, Nusselt number, heat transfer coefficient, and heat transfer rate without using any inserts in the DPHE was experimentally investigated. The results of the experiments revealed that the heat transfer coefficient and Nusselt number increase with increasing Reynolds number (Re) and concentration of MXene nanoparticles in the base fluids. Maximum enhancement in heat transfer coefficient (126%) was achieved for methanol-based MXene nanofluids at 0.05 vol %. Moreover, the Nusselt number exhibits a maximum enhancement of ∼50% for methanol- and water-based MXene nanofluids. In contrast, the thermal performance factor was also estimated, and it was observed that water- and methanol- based MXene nanofluids showed higher values than castor oil- and silicone oil-based MXene nanofluids. Finally, the LMTD and heat transfer coefficients were successfully validated using Aspen HYSYS 12.1 software.

Improvement of thermal performance through nanofluids in industrial applications: A review on technical aspects

Nanofluids (NFs) have emerged as a transformative technology in industrial heat transfer applications due to their demonstrably superior thermal properties compared to conventional fluids. These engineered suspensions of nanoparticles in base fluids, including oil, ethylene glycol, or water exhibit significant enhancements in both conductive and convective heat transfer mechanisms. Their high surface area-to-volume ratio translates to exceptional heat exchange potential, making NFs ideally suited for real-world engineering applications. The performance of heat-transfer fluids may be greatly enhanced by NFs. This paper presents a summary to address the special properties of NFs, including their methods of synthesis, heat transfer processes, improvement of conduction and convection heat transfer, and maximizing heat exchange potential because of their high surface area relative to their volume. This paper also reviews the stability of NFs and the various methods to study their stability and their thermophysical characteristics. Finally, applications of NFs in various areas and industries are described, along with suggestions for future research that would encourage the rapid commercialization of NFs.

A Comment on the Utility of Nanofluids: Interactive Influence of Nanoparticle Size and Amount at Varying Temperatures

Interactive influence of nanoparticle diameter, dp and volumetric fraction, φ on major thermophysical characteristics of relative thermal conductivity, kr and dynamic viscosity, μr of nanofluids as a primary function of temperature, T is determined to assess the utility of nanofluids. In the case study common base fluids of water (W) and ethylene glycol (EG) are used. Spherical shape Ag and Al2O3 with a selected dp range of (20–100 nm) are used in the covered φ range of (0.25–5%). Influence of T is set by considering T = 293 K and T = 323 K. The referred data ranges are applied for the calculation of kr and μr of nanofluids Ag–W, EG and Al2O3–W, EG in reference to a calculation procedure provided previously by the authors. The calculated magnitudes of kr and μr are expressed as a function of dp, φ and T. The results reveal that kr and μr rise dramatically as dp decrease from 40 nm to 20 nm and φ increase from 2% to 5% at T = 293 K and T = 323 K. The calculations confirm the relevant literature that the required pumping power increase is associated with low dp and high φ. Therefore, here exists limiting magnitudes of dp, φ as a function of T for the effective utilization of nanoparticles in base fluids. In order to generalize the fact non-dimensional parameters of Prandtl Number, Pr and Reynolds Number, Re should be referred due to the definitions of each depend on thermophysical characteristics and the cited dp, φ and T. The calculations herein have the validity range of Re and Pr of base fluids as 0.0002–0.032 and 3.58–210.30, respectively.

Convection and phase change in a lid-driven trapezoidal vented cavity with encapsulated PCM under non-uniform magnetic field by using ternary nanofluid

In this study, a novel configuration of lid-driven vented cavity system equipped with encapsulated phase change materials is studied where applications are relevant in drying, material processing, and electronic cooling. For controlling the convective heat transfer and phase transition, combined utilization of non-uniform magnetic field with ternary nanofluid is offered. Upper wall is inclined and moving with constant speed while ternary nanofluid up to a loading of 0.03 is used. Galerkin weighted residual finite element method is considered as the solution technique. A range of parameters for Reynolds number (Re, 200–1000), wall velocity (Rep, 0–1500), Hartmann number (Ha, 0–30), inclination parameter (yd, 0–0.4H), non-uniform amplitude (Af, 0–0.3), and nanoparticle loading (ϕ, 0–0.03) are considered in the analysis. When Re is increased, transition time (tf) is generally reduced for moving wall case. Reduction of tf up to 65% is obtained at the highest Re when moving wall is used at Rep=1000. For stationary wall case, the behavior of tf with Re is non-monotonic while at the highest Re, tf is reduced. The phase transition process is strongly influenced by the moving wall velocity while first increment and decrement of tf with wall velocity is observed. Thermal performance rises by around 58% and 22%, respectively by using the highest Re for stationary and moving walls. There is a significant increase in heat transfer, of around 211%, as wall velocities rise from Rep=0 (stationary) to Rep=1500. The tf for the moving wall is decreased by around 43.7% at the highest Ha. According to the stationary scenario, tf rises by around 33% until Ha=15 and falls by roughly 39.2% between Ha=15 and Ha=30. Amplitude of non-uniform magnetic field results in variation of tf between 4.5% and 19%. When imposing magnetic field at maximum strength, thermal performance is improved by 44.75% with a moving wall while it is just 5% in a stationary scenario. While raising the value of upper wall’s inclination (yd) increases the thermal performance, it also influences the phase change process. More loading of nanoparticles in base fluid results in a faster transition; the corresponding decreases in tf are 24.5% and 12.7% for stationary and moving wall setups, respectively. The increases in thermal performance for stationary and moving wall cases are 36.3% and 33.7%, respectively.

IMPACTS OF USING POROUS CORNER PARTITIONS AND BLADE SHAPED NANOPARTICLES IN BASE FLUID ON THE PERFORMANCE IMPROVEMENT OF THERMOELECTRIC GENERATOR MOUNTED VENTED CAVITIES AND INTERFACE TEMPERATURE ESTIMATION WITH PROPER ORTHOGONAL DECOMPOSITION

Numerous technical applications, such as solar power, refrigeration, waste heat recovery, thermal management, and many more, employ thermoelectric devices because of the numerous advantages they offer. Techniques are required to improve their effectiveness in usage. In this study, a unique technique for improving the performance of a thermoelectric generator (TEG) positioned between vented cavities is proposed. The method combines the effects of blade-shaped nanoparticles in the base fluid and corner porous partitions. A numerical study using the finite element method is conducted for different values of Darcy number of upper and lower cavity (10<sup>-6</sup> ≤ Da<sub>1</sub> ≤ 10<sup>-2</sup>, 10<sup>-6</sup> ≤ Da<sub>2</sub> ≤ 10<sup>-2</sup>), opening ratio (SR between 0.5 and 2.5), and nanoparticle loading amount (SVF between 0 and 0.03). By adjusting the permeability of the partitions and opening ratio of the cavities, significant changes in the flow field can be obtained. TEG power increases with greater opening ratios and lower partition permeabilities. By changing the permeability, the TEG power can increase by up to 27.5 percent, while increasing the opening ratio from SR = 0.5 to SR = 1 can increase the TEG power by up to 140 percent. Using blade-shaped nanoparticles results in additional improvements, with values of 32.7% at SR = 0.5 and 20.26% at SR = 2.5. Using 180 parametric computational fluid dynamics cases, a POD-based low-cost reconstruction model is created for the interface temperatures at the hot and cold sides using five-POD modes. The method may be used for other complicated geometries where 3-D computations are costly and allows for the rapid computation of coupled TEG-vented cavity systems with corner partitions.

Statistical investigations and morphological aspects of cross-rheological material suspended in transportation of alumina, silica, titanium, and ethylene glycol via the Galerkin algorithm

Abstract Several industrial applications include the use of nanoparticles in base fluids to improve the thermal performance of numerous mechanisms. The current inspection covers the investigation of trihybrid nanoparticles mixed in the cross-fluid model part of a rotating stretched surface in the presence of a heat source/sink, radiation effect, and nonlinear/linear convection. A trihybrid fluid is a unique type of fluid that surpasses hybrid nanofluids, conventional fluids, and nanofluids. Moreover, acetone and engine oil interchange energy in comparison to other liquids. Trihybrid fluids are now widely used in facilities such as electrical chillers, biotechnology, power pumps, the automotive industry, and air cleaners. The flow presenting model equations are derived in a rotating frame to study the momentum and thermal transportation in a nanofluid. The modeled problem was simplified by considering the boundary layer principle, which resulted in the formation of complex coupled partial differential equations (PDEs). The derived PDEs were converted into the corresponding nonlinear ODEs using suitable similarity transformations. Then, the converted ordinary differential equations (ODEs) were solved numerically via a strong and authentic procedure called finite element procedure from the current inspection; it is recoded that finite element method is a powerful method to handle complex problems arising in modeling of several mechanisms.

Stability Evaluation of Nanofluids Suitable for Enhanced Oil Recovery

The evaluation of metal oxides nanoparticles stability in the base fluids has become a major aspect in enhanced oil recovery process in recent years. Physical and chemical properties of ZnO nanofluids have caught attention of many researchers because they are easily dispersed in the base fluids, better convective coefficient of heat transfer, and wider bandgap which make them remarkable nanofluids candidate compared to other metal oxides. In this study, the stability of nanofluid of zinc oxide nanoparticles was evaluated using different stability tests and analysis. However, ZnO nanoparticles were synthesized using sol-gel method and nanofluids of different concentrations were prepared. The prepared nanoparticles were characterized using various characterization techniques such as XRD, FTIR, TEM, and Zeta sizer. The stability of prepared nanofluids was investigated using sedimentation test, UV-vis spectrophotometer, and zeta analyzer. Based on physical investigation and UV-vis spectra observations, ZnO nanoparticles in base fluids have shown a good colloidal stability in addition to their high zeta potential values of-43.7 (mV) after seven days which makes it a successful potential candidate for enhanced oil recovery applications.

Novel strategy of mixing MgO in CuO/water nanofluid for thermal conductivity improvement: Experimental study

The objective of the research is to address how polyhedron shaped MgO nanoparticles can solve the poor thermal conductivity issues due to spherical form of CuO nanoparticles. The novelty is the enhancement of thermal conductivity due to the combined effect of specific heat of MgO and two-step approach for the preparation of nanofluid. In the current study, the novel strategy for addition of fraction of MgO nanoparticles to improve the inferior thermal conductivity (TC) resulted due to agglomeration of CuO in water is addressed with proper experimental data. This novel approach was done with CuO/MgO weight ratio 7:3 and at volume fraction (VOF) of nanoparticles from 0.25 to 1.5 % in water from 30 to 55 °C. The present investigation resulted that marginal improvement in TC with a well defined contribution of nanoparticle in base fluid. Additionally, the outcome demonstrated that, particularly at higher temperatures, the thermal conductivity enhancement of nanofluid was proportional to both volume fraction and temperature. One such evidence was 12.5 % increase in TC at 55 °C and 1.5 % VOF. Likewise, the thermal conductivity's experimental result at various temperature and particle fraction was highlighted with proper literatures.

Influence of shape factor on a chemically reactive hybrid nanofluid flow via a moving plate when Soret and Dufour effects are significant: An irreversibility analysis with Cattaneo-Christov heat flux model

Nanofluids, which are suspensions of nanoparticles in base fluids, have gained significant attention in the field of fluid dynamics due to their unique properties and potential applications. Researchers are exploring the use of nanofluids in areas such as energy storage, solar energy conversion, biomedical devices, and advanced manufacturing processes. Nanofluids offer opportunities to improve existing fluid-based technologies and enable the development of novel systems with enhanced performance. The influence of shape factor, Soret, Dufour and quadratic thermal radiation parameters on a hybrid nanofluid (Water + Multi-Walled Carbon Nanotubes () + Copper (II) oxide ()) flow over a flat plate with chemical reaction is analyzed in this article. The process of heat transfer is analyzed using the heat flux model developed by Cattaneo and Christov. This article also includes an analysis of irreversibility. Governing equations of this study are transformed into a system of nonlinear ordinary differential equations by using suitable similarity transformations, and this system is solved by means of the bvp4c solver. Outcomes are provided for three instances related to shape factor i.e. Platelet, Cylinder and Brick. Influence of some important parameters (including Dufour number) on skin friction coefficient, Nusselt number and Sherwood number were discussed using bar diagrams. It is clear from a closer inspection that as skin friction coefficient declines with the escalation in magnetic field parameter () and volume fraction of nanoparticles (). At the skin friction coefficient is seen to drop at a rate of 0.38663 (Platelet shape), 0.40361 (Cylinder shape) and 0.42987 (Brick shape). It is detected that Dufour number () and thermal relaxation parameter () both have different effects on the Nusselt number. It is discovered that, when the Nusselt number declines by 0.28159 (in case of Platelet), 0.27528 (in case of Cylinder), and 0.26552 (in case of Brick).

An Analysis of the Efficient Use of Nanoparticles in Air Conditioners Based on Vapour Compression Refrigeration Systems

The urgent need for energy-saving initiatives has shifted its focus to improve air conditioner efficiency. Room air conditioners are used by roughly half of India’s population, so their performance must be improved. Any improvement in the performance of the air conditioner will result in significant energy savings. Nanoparticles in base fluid are used to improve the performance of Vapour Compression Refrigeration System i.e., VCRS-based air conditioners by taking advantage of increased thermal conductivity. This paper summarises the various approaches to using nanofluid in air conditioners based on the Vapour Compression Refrigeration System (VCRS). It covers methods such as using nanoparticles as a secondary fluid for heat extraction, nanorefrigerant and nanolubricant which will aid researchers in exploring newer methods of improvement

Evaluation of electrical properties of graphene nanopowder-dispersed propylene glycol-water solutions

Nanofluids, which are suspensions of nanoparticles in base fluids, have gained significant attention in recent years due to their enhanced thermal and electrical properties. In particular, propylene glycol-water nanofluids have been extensively investigated for their electrical properties. The primary goal of this study is to evaluate the electrical characteristics of nanofluids containing graphene powder distributed in propylene glycol-water. Compositions containing 100:0, 75:25, as well as 50:50 of Propylene Glycol as well as Water were created, along with other nano fluids. Both types of base fluids were infused with graphene at quantities of 0.25 as well as 0.5 percent, respectively. The assessment of electrical characteristics in nanofluids includes the analysis of parameters like breakdown voltage, permittivity, resistivity, and electrical conductivity. With the increase in the diameter there is an increase in the value of resistivity with the dispersion of graphene nano powder whereas breakdown voltage, permittivity and electrical conductivity have been decreased with the increase in the diameter. Overall with the dispersion of graphene in nano powder the electrical properties have been enhanced. Furthermore, it discusses the underlying mechanisms and provides insights into potential applications of propylene glycol-water nanofluids in electrical and electronic systems.

Effect of Microwave Irradiation on the Dielectric Characteristics of Semi-Conductive Nanoparticle-Based Nanofluids: Progress towards the Microwave Synthesis.

Studies on dispersing nanoparticles in base fluid to elevate its essential and critical properties have evolved significantly in the recent decade. Alongside the conventional dispersion techniques used for nanofluid synthesis, microwave energy at 2.4 GHz frequency is irradiated onto the nanofluids is experimented with in this study. The effect of microwave irradiation on the electrical and thermal properties of semi-conductive nanofluids (SNF) is investigated and presented in this article. Titanium dioxide and zinc oxide are the semi-conductive nanoparticles used for this study to synthesize the SNF, viz., titania nanofluid (TNF) and zinc nanofluid (ZNF). Flash and fire points are the thermal properties verified, and dielectric breakdown strength, dielectric constant (εr), and dielectric dissipation factor (tan δ) are the electrical properties verified in this study. AC breakdown voltage (BDV) of TNF and ZNF is improved by 16.78% and 11.25%, respectively, more than SNFs prepared without microwave irradiation. Results justify that the synergetic effect of stirring, sonication, and microwave irradiation in a rational sequence (microwave synthesis) exhibited better electrical and unaltered thermal properties. This microwave-applied nanofluid synthesis could be a simple and effective route to prepare the SNF with improved electrical properties.

Darcy–Forchheimer natural convection flow of SWCNTs-EG-based nanofluid along a complex roughened surface

The study of heat transfer in natural convection flow of nanofluid (mixture of SWCNTs and ethylene glycol fluid) through a complex roughened surface saturated in a porous medium is investigated. The governing equations in terms of nonlinear PDEs are derived using Darcy–Forchheimer and Tiwari and Das models and made dimensionless using transformation. A finite difference scheme with backward and central differences approximations is used to conduct numerical solution. Recently, researchers have focused on the use of roughened surfaces or suspension of nanoparticles in base fluid to improve heat transfer rate. The objective of this study is to quantify the increase in heat transfer rate due to complex roughened surface and nanofluid. The results reveal that total heat transfer rate raises higher in nanofluid as compared to largest amplitude of harmonic wave. The absolute value of drag coefficient and rate of total heat transfer grow by increasing the value of Darcy number. Near the leading edge, the total heat transfer rate declines up-to certain node value which is 0.2125 and 0.2071 in the absence and presence of nanofluid and increases away from these node values. Streams slices and isotherm lines expand in case of largest amplitude of harmonic wave and nanofluid.

Road ahead for comparative study of entropy induced model through hybrid and ternary hybrid nanomaterials

Magnetohydrodynamic (MHD) Darcy-Forchheimer flow of ternary hybrid nanoliquid is addressed. Stretching cylinder is produced liquid flow. Entropy generation is taken into account. Ternary nanofluids consist of three nanoparticles in base fluid. Here silver, disulfide molybdenum and multi-walled carbon nanotubes are used as nanoparticles and engine oil as base liquid. Joule heating, thermal radiation, dissipation and heat generation are accounted. Numerical solution by ND-solve technique for nonlinear differential system is constructed. Behaviors for several parameters on the quantities are explored. Thermal field and entropy generation against magnetic field are opposite to that of velocity. Radiation for temperature and entropy rate has similar scenario. Temperature against Prandtl number is decreased. Velocity gradient and Nusselt number versus sundry variables are explored. Larger values of magnetic field effect have opposite trend for drag force and rate of heat transport. An enhancement in thermal transfer rate is seen for radiation.

Experimental investigation on pH and stability of distilled water ethylene glycol mixture with graphene nanoplatelets

An efficient heat transfer medium improves the overall efficiency of the equipment, and the main difficulty is with making well-dispersed nanoparticles in base fluids. The current research is focused to study the effect of different surfactants on nanoparticle dispersion and enhancement through property modifications. The stability and pH value of various surfactants with varying sonication duration were studied and compared with the graphene nanofluids. The graphene nanofluids were prepared by a two-step method by dispersing 0.1 wt% graphene nanoparticles in distilled water and ethylene glycol with a ratio of 70:30. The surfactants namely Cetyltrimethylammonium bromide (CTAB), Polyvinylpyrrolidone (PVP K-30), and Polysorbate 60 (Tween 60) of each 0.1 wt% were used for stabilizing the nanofluids. The duration of the sonication process was set as 60, 90, and 120 min respectively followed by the magnetic stirring for 60 min duration. The stability behavior of nanofluids was studied through visual inspection, UV spectrum, and zeta potential techniques, and the corresponding pH values were measured to correlate with the performance of the heat transfer equipment. The results showed that the dispersion of graphene nanofluids strongly depends on the type and amount of dispersant in the absolute value of zeta potential. Finally, the optimum conditions were found based on the enhanced stability, pH, and sonication time of graphene nanoplatelets in distilled water-ethylene glycol mixture with Polyvinylpyrrolidone (PVP K-30) as a surfactant for the battery thermal management systems (BTMS) in electric vehicles.

Thermal flow of micropolar gold-blood nanofluid flowing through a permeable channel with impact of gyarotactic microorganisms

Presently, the scientists across the world are carrying out the theoretical as well as the experimental examinations for describing the importance of nanofluid in the heat transfer phenomena. Such fluids can be obtained by suspending nanoparticles in base fluid. Experimentally, it has proved that the thermal characteristics of nanofluid are much better and appealing as compared to traditional fluid. The current work investigates the heat transfer for flow of blood that comprises of micropolar gold nanoparticles. A microorganism creation also affects the concentration of nanoparticles inside the channel. Suitable transformation has used to change the mathematical model to dimensionless form and then have solved by employing the homotopy analysis method. In this investigation it has revealed that, fluid?s motion decays with growth in Reynolds, Darcy numbers and volumetric fraction. Thermal characteristics support by augmentation in volumetric fraction, while oppose by Prandtl number. Density of microorganism weakens by growth in Peclet and bioconvection Lewis numbers.

Numerical simulation on Cu–H2O nanofluid of destructive and generative reactions in a Darcian medium: application of wall suction and blowing

Application of – nanoparticles in a base fluid of water means the growth of thermal conductivity of Nanofluid. This physical behavior recommends the prospect of applying nanofluids in electronic cooling and advanced nuclear systems. The formulated leading equations are transformed to non-dimensional form by appropriate similarity transformations and finally solved numerically through Runge–Kutta Shooting method of 4th order. The novelty of the current investigation is to examine the impact of wall suction/ injection over the dual solutions by numerical simulation for time-independent, two- dimensional nanofluid flow along a semi-infinite porous stretching horizontal wall placed in a Darcian medium under the application of magnetic drag force. The significant outputs are portrayed in dual solutions for suction/injection and deliberated their salient effects of various emerging physical variables on velocity, temperature, and molar concentration of Copper nanoparticles in water base fluid. It is obtained that the nanoparticle concentration grows via larger destructive chemical reaction and lessens when generative chemical reaction is enhanced. This investigation leads to opposite behavior due to endothermic reaction. The significance of such investigation in Darcian porous medium have frequent applications in the major area of industrial and engineering technologies that covers the bio-engineering, rubber technology and material processing.

Effect of CuO‐, SiO2‐, and Al2O3‐based nanofluids on automotive cooling systems from laminar to turbulent flow regime—A CFD study

AbstractIn recent studies, much attention has been given to nanofluids suggesting that adding nanoparticles in base fluids offers a higher heat transfer rate compared with conventional fluids. This study is based on the numerical investigation of different types of nanofluids, consisting of CuO (50 nm), SiO2 (40 nm), and Al2O3 (15 nm) nanoparticles at different volume concentrations. Several simulations were performed from low to high Reynolds numbers, corresponding to laminar and turbulent flow regimes using ANSYS‐Fluent CFD solver. Results suggest that under a laminar flow regime with the same Reynolds number of 2000, CuO‐based nanofluids perform better as compared with SiO2 and Al2O3‐based nanofluids with Nusselt number (Nu) having percentage increase of 90% and 60% comparing with SiO2‐ and Al2O3‐based nanofluids, respectively. However, at higher Reynolds numbers when the flow is turbulent, Al2O3‐based nanofluids demonstrate better performance having a percentage increase in Nusselt numbers equal to 40% and 23% as compared with CuO and SiO2‐based nanofluids respectively under the same Reynolds number of 15,000. This implies that turbulence has a significant effect on heat transfer rate, and is not only related to thermal conductivity. This study will help in designing more compact cooling systems for engines and the internal environment of motor vehicles.

Energy harvesting feasibility from photovoltaic/thermal (PV/T) hybrid system with [formula omitted]-glycerol nanofluid optical filter

In this interdisciplinary experimental study a new nanofluid-based optical filter (NFOF) was designed and tested for a photovoltaic/thermal (PV/T) hybrid system. To this end, Ag/ Cr2O3 nanoparticles (NPs) were synthesized with 5% concentration of Ag, then the obtained Ag/Cr2O3 NPs were suspended in glycerol (C3H8O3). The prepared nanofluid optical filter is outstanding and novel from some aspects: (i) the simple synthesis method of Ag/Cr2O3 NPs, (ii) bears desirable transmittance, (iii) high stability of nanoparticles in base fluid, (iv) low-cost production process, (v) acceptable overall energetic and exergetic efficiency. The intense solar irradiance occurs in the visible spectrum range where most solar systems are designed based on this range. Moreover, the highest spectral response of the silicon type solar cells can be achieved in wavelengths between 650 nm and 1075 nm (ideal window). Therefore, the prepared NFOF filters was designed to have maximum transmittance in wavelengths between 650 nm and 1075 nm for efficient photo-electrical conversion. Accordingly, they should have high absorbance in the wavelengths out of the said region (especially visible spectrum) for optimum photo-thermal conversion. The incident of spectra out of ideal window not only doesn't have any contribution to PV cell electricity generation, but also increases cell temperature which subsequently reduces its efficiency and longevity. For this purpose, NFOF was used as a selective thermal absorber that protects PV cell against unrequired spectra. Three different concentrations of Ag/Cr2O3 NPs were suspended in glycerol (10 ppm, 40 ppm, and 80 ppm). The performance of the hybrid PV/T system was checked by photothermal/electrical conversion efficiency, merit function, and overall exergy efficiency. The maximum photothermal energy conversion efficiency is 31.55% which is obtained by Ag/Cr2O3-glycerol (80 ppm) NFOF. Also, the highest value of photoelectric energy conversion is 13.25% which is obtained when there is no filter. Moreover, the Ag/Cr2O3-glycerol (40 ppm) NFOF caused the highest amount of overall energy efficiency (41%) and merit function (1.558). When E(λ)≠0, the highest and lowest overall exergy efficiency during 30 min testing was obtained by glycerol and Ag/Cr2O3-glycerol (80 ppm), while this is completely inverse when E(λ) = 0.