To reach more efficient solar system, hybrid nanomaterial has been applied through the tube. The pipe was equipped with new shape of turbulator to augment the swirl flow. Special shape of turbulator makes it possible to act as fin because of connection with pipe. Hybrid nanoparticles contain MWCNT and Al 2 O 3 and base fluid is H 2 O. To model the hybrid nanomaterial, empirical correlation were incorporated considering homogeneous mixture. Turbulent flow within the pipe was molded via K- ɛ technique. Insert of turbulator creates secondary flows which provide higher radial velocity and disruption of isotherms leads to higher convective flow. Checking the accuracy of modeling was done with comparing the obtained data with previous publication about turbulent flow within a tube equipped with turbulator. Augment of revolution can augment the velocity about 43.81% while temperature of plate decreases about 0.016%. Higher pumping power leads to rise of velocity about 99.05% while outlet temperature reduces about 0.096%. Nu and Darcy factor decline by 6.57% and 66.89% with augmenting b . Friction factor decreases with rise of Re by 12.43% while Nu goes up by 75.22%. • Hybrid nanomaterial was utilized inside the absorber pipe equipped with new turbulator. • Hybrid nanoparticles contain MWCNT and Al 2 O 3 . • Insert of turbulator creates secondary flows which provide higher radial velocity. • Augment of revolution can augment the velocity about 43.81%. • Friction factor decreases with rise of Re by 12.43%. 

Influence of novel turbulator on efficiency of solar collector system

Nanoparticles transportation with turbulent regime through a solar collector with helical tapes

Freezing process of paraffin within a system with fins was simulated in this paper. The kind of PCM is RT28 and CuO nano-powders are added to enhance the conductivity. Three configurations for fins were assumed in this research and all of them have equal volume of paraffin. These two techniques have positive effect on reducing required time of process. Although buoyancy has no sensible impact on freezing phenomena, its related term was considered in equations. Structure grid has been created in ANSYS FLUENT to augment the accuracy. Homogeneous formulation for nanoparticle was applied and implicit approach for modeling of transient term was incorporated. Cold flow within the pipe makes RT28 to lose heat and freezing begins from the region next to the inner wall. Existence of fins makes conduction stronger and freezing time decreases. With changing style of fins from A to C, liquid fraction declines about 37.93% while temperature augments about 0.45% when t = 50 min. The minimum required time occurs for case C in which whole paraffin converts to solid after 65 min. 

Modeling for solidification of paraffin equipped with nanoparticles utilizing fins

An enhanced hybrid arithmetic optimization algorithm for engineering applications

Electrical efficiency of the photovoltaic/thermal collectors cooled by nanofluids: Machine learning simulation and optimization by evolutionary algorithm

Optimal structure design of a PV/FC HRES using amended Water Strider Algorithm

Model identification of the Proton Exchange Membrane Fuel Cells by Extreme Learning Machine and a developed version of Arithmetic Optimization Algorithm

Comprehensive evaluation of flat plate and parabolic dish solar collectors’ performance using different operating fluids and MWCNT nanofluid in different climatic conditions

Ping Ouyang

Papers

Optimal structure design of a PV/FC HRES using amended Water Strider Algorithm

Model identification of the Proton Exchange Membrane Fuel Cells by Extreme Learning Machine and a developed version of Arithmetic Optimization Algorithm

Comprehensive evaluation of flat plate and parabolic dish solar collectors’ performance using different operating fluids and MWCNT nanofluid in different climatic conditions