The operational temperature highly influences the efficiency of solar photovoltaic (PV) module, in which high decreases output power accordingly. In this work, a polycrystalline PV module is modified using finned phase change material (PCM) panel attached to rear as thermal energy storage unit decrease and regulate operating under hot weather conditions southern Iraq. For purpose, local Iraqi paraffin wax used PCM loaded into galvanized steel that has internal smooth wavy fins improve poor...

Modern living and technological advancements demand high-power microchips, leading to an increase in chip surface temperatures. To mitigate this heat, porous metallic heat sinks are employed. This study presents a simulation of microprocessor (>10⁴ W/m²) encased sink. The microchip measures 4 cm diameter with thickness 5 mm. governing equations solved numerically using the finite element method, implemented COMSOL Multiphysics software. paper investigates cooling performance through...

In recent years, the summer season in Iraq has become longer and hotter than before, leading to high cooling loads inside buildings increased demand for electrical energy. The use of sustainable energy insulation techniques building envelopes are reasonable solutions overcoming harsh weather conditions reaching acceptable thermal comfort levels. this study, a survey on more 60 residential Al-Amarah City, Iraq, was conducted 21 July 2018 examine nature most common construction materials used...

We examine resonant flow of fluid in porous media over a variable gravity. A heat source/sink which varies with height has been investigated. In this case, it is shown that there are three distinct sub-layers can cause convective overturning instability. The possibility resonance between the motion these layers discussed. specific area very rapid increase Rayleigh number noticed. addition to linear theory, nonlinear stability theory studied. To verify reliability instability limits,...

Purpose – The purpose of this paper is to explore a model for thermal convection in plane layer when the density-temperature relation buoyancy term quadratic. A heat source/sink varying linear fashion with vertical height expressed as z was allowed, functioning sink an area and source remainder. Design/methodology/approach First, authors present governing equations motion derive associated perturbation equations. Second, introduce nonlinear analysis system. Third, transform system...

Abstract Natural convection in a triangular cavity filled with air is investigated numerically. In this paper, the exposed to stream cooling exerted on its sides and it heated by fixed heat flux from base. The inside assumed be laminar obeying Boussinesq approximation. governing equations are solved numerically using finite volume technique SIMPLE algorithm. results achieved range of Rayleigh number (10 4 < Ra 10 7 ), free Reynolds 3 Re ∞ 1.5 × four aspect ratios (AR = 0.25, 0.5, 0.866,...

A theoretical study of storage thermal energy using capsulated cylinders filled with phase change material PCM is performed. These are arranged in-line in the direction heat transfer fluid. The equations fluid (water) and capsules solved numerically finite volume method capacity for PCM. effect Reynolds number ratio pitch to diameter on temperature distribution melt fraction presented. results show that increment both gives decrement final time melting cylinders.

Modern life makes energy, and the source of it is very important. This renewable energy comes from Earth-Air Heat Exchanger (EAHE) in soil employed as an air conditioning device for buildings climate conditions Basrah city, south Iraq. In present study, EAHE buried simulated numerically using finite volume method with a soft package. ANSYS: Fluent 2021/R2. A parametric analysis was carried out to determine effect three depths (Z = 1, 2, 3 m), taking into account physical properties area...

Mixed convection heat transfer for laminar air flow inside a vented square enclosure with rotation inner cylinder is studied numerically The bottom wall heated at constant temperature (Th ) while the other walls and surfaces of are adiabatic. An external enters cavity through an opening located down left vertical exits from in upper right wall. conservation governing equations (continuity, momentum energy solved by finite element method using Flex PDE software package. Results velocity...

Abstract The linear and nonlinear stability analysis of the motionless state (conduction solution) a vertical throughflow in an anisotropic porous medium are tested. In particular, effect nonhomogeneous porosity constant thermal diffusivity have been taken into account. Then, accuracy instability thresholds tested using three dimensional simulation. It is shown that strong stabilising gravity field. Moreover, results support assertion theory, general, accurate predicting onset convective...

Abstract Determining of the pressure loss is very complicated task in petroleum drilling industry. In present study effect different muds flowing inside rotating pipe and exist from an annuals investigated. The speed inlet speed. flow turbulent, steady 3D with non-Newtonian fluid. governing equations (continuity momentum) are solved numerically using CFD fluent soft package. results presented as : stream line, contours, drop wall shear stress. show that decreased when rotational increase....

The effect of hydraulic fracturing on the permeability and fluid flow various Iraqi oil storage cores has been studied. Rumaila, Majnoon, Zubair fields with different were included in this study. Experiments performed to determine breaking pressure permeable core. Therefore, numerical experimental results compared test constant impermeable Finite Volume Method (EbFVM) corresponding Dual Porosity Permeability Model (DPDP) was used. A fractured reservoir studied for its single-phase behavior....

In this study, a CFD simulation analysis was used to predict the characteristics of swirl flow as reference optimize new design microbubble generator. To examine impact inlet design, three different configurations type were applied, namely single inlet, double and tangent-circle inlet. The performance generator characterized in terms velocity, pressure drop radial position, distribution along central axis Generally, succeeded visualize hypothetical bath streamlines inside generators. results...