Experiments are undertaken to determine the efficiency of an evacuated tube solar collector using water-based Titanium Oxide (TiO2) nanofluid at the Pekan Campus (3 ̊32’ N, 103 ̊25’ E), Faculty of Mechanical Engineering, University Malaysia Pahang, for the conversion of solar thermal energy. Malaysia lies in the equatorial zone with an average daily solar insolation of more than 900 W/m2, which c...

Abstract This paper presents the numerical study of thermal performance factor Al 2 O 3 -Cu/water hybrid nanofluid in circular and non-circular ducts (square rectangular). Turbulent regime is studied with Reynolds number ranges from 10000 to 100000. The heat transfer flow behaviour are investigated, considering volume concentration between 0.1 2%. evaluated terms evaluation criteria (PEC). pres...

Hybrid nanofluid has an extensive range of real-world applications. is a new and advanced modification extensively used to increase thermal efficiency in fluid flow systems. The main objective this research study magnetohydrodynamics hybrid numerically two dimensional over vertical exponentially shrinking sheet, considering the effects Joule heating slip condition. Furthermore, using Tiwari-Das...

It is necessary to control the temperature of solar cells for enhancing efficiency with increasing concentrations of multiple photovoltaic systems. A heterogeneous two-phase model was established after considering the interacting between temperature, viscosity, the flow of nanofluid, and the motion of nanoparticles in the nanofluid, in order to study the microchannel heat sink (MCHS) using Al2O...

In this study the performances of various non-circular microchannel heat sinks (normalized with circular shape) have been comparatively analyzed for CuO-water nanofluid and baseline pure water flow. Nusselt number and Poiseuille number for each microchannel and thermo-physical properties of CuO-water nanofluid (viz., thermal conductivity, viscosity, specific heat and density) have been designed...

The entropy generation based on the second law of thermodynamics is investigated for turbulent forced convection flow of ZrO2-water nanofluid through a square pipe with constant wall heat flux. Effects of different particle concentrations, inlet conditions and particle sizes on entropy generation of ZrO2-water nanofluid are studied. Contributions from frictional and thermal entropy generations ...

This study compares environmental and economic impacts of using nanofluids to enhance solar collector efficiency as compared to conventional solar collectors for domestic hotwater systems. Results show that for the current cost of nanoparticles the nanofluid based solar collector has a slightly longer payback period but at the end of its useful life has the same economic savings as a convention...

This study presents energy, entropy, and exergy analyses of Al2O3-Cu/water hybrid nanofluid flow in a trapezoidal cross-sectioned channel under turbulent regime (104<Re<105) for the first time. Understanding main source entropy generation along channel, also obtaining total variation comparing to single nanofluids (Al2O3/water Cu/water) base fluid is pursued objective. In other p...

Numerical simulation is performed to investigate the laminar force convection of Al2O3/water nanofluid in a flow channel with discrete heat sources. The heat sources are placed on the bottom wall of channel which produce much thermal energy that must be evacuated from the system. The remaining surfaces of channel are kept adiabatic to exchange energy between nanofluid and heat sources. In the p...