Tesfaye B Zema

Wolaita Sodo University, Mechanical Engineering, Faculty Member

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Tesfaye Barza Zema
Lecturer, Researcher, and Reviewer in Mechanical Engineering at Wolaita Sodo University, specializing in HVAC/R systems, Computational Fluid Dynamics (CFD), heat and mass transfer, and thermodynamic analysis. Published author with Scopus-indexed articles and reviewer for esteemed journals including Springer Nature. Actively involved in cutting-edge research and international collaborations. Contact: [email protected] | +251926314030 | Wolaita Sodo, Ethiopia.
Phone: +251926314030
Address: Wolaita Sodo, 109-2244 Sst.

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Papers by Tesfaye B Zema

WITHDRAWN: Numerical investigation of fluid flow simulation through a cylindrical shape orifice flow meter using Ansys-fluent software

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) systems using nanorefrigerant [R-134a + ZrO2] at steady-state

Journal of Mechanical Science and Technology, Nov 30, 2023

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) sy... more

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) systems using nanorefrigerant [R-134a + ZrO 2 ] at steadystate

Journal of Mechanical Science and Technology, 2023

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) sy... more

$Fig. 5. Nano zirconia - spherical morphology. University, Ethiopia, the Zirconium oxide (ZrO2) nanoparticles were characterized using X-RD and SEM analysis. The crystal- linity and phase purity of the ZrO. were determined by an X-ray diffractometer. The zirconia's XRD reveals strong crystallinity with distinct peaks at 2, 28, and 31.56 degrees,and diffraction levels at 20, 28.26°, and 31.56°, 31.56° [23].$

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Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) systems using nanorefrigerant [R-134a + ZrO 2 ] at steadystate

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) sy... more

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Design and Simulation of Shell-And-Tube Heat Exchanger (Sthe) with the Effect of Baffles Using CFD-Tool

Zenodo (CERN European Organization for Nuclear Research), May 5, 2023

In the current scenario, heat exchangers are used in the thermal system to maintain the working l... more In the current scenario, heat exchangers are used in the thermal system to maintain the working liquid's temperature. Due to their robust design and performance characteristics, the Shell and Tube Heat Exchangers (STHE) are mainly used in the generation of electricity, the cooling of hydraulic fluid, transmissions, and hydraulic power packs. This can further be improved to achieve a higher heat transfer rate. It consists of a casing with several tubes inside. The project's ideology is based on the use of baffles attached to the heat exchanger to increase the flow rate of highly viscous fluids. The paper's intended result is to determine the rate of heat transfer using hot water as the hot liquid. The theoretical analysis results obtained in this study were reasonably predicted by computational fluid dynamic (CFD) under Ansys Cfx. The simulation consists of modeling, meshing cross-sectioning, and the fluid behavior in the shell and tube of STHE are used in Ansys fluent 16.0. Finally, the effectiveness of the design parameters and contour conditions published under Ansys Cfx.

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Flow Simulation And Performance Analysis Of Centrifugal Compressor Using Cfd_Tool

This paper is concerned the flow simulation and performance analysis of the Centrifugal Compresso... more This paper is concerned the flow simulation and performance analysis of the Centrifugal Compressor Using CFD-Tool. The complex internal flow of centrifugal compressor can be well analyzed, and the unique design system needs to be developed. It should be early to use the interface and also flexible for input and output. A 3-D flow simulation of turbulent-fluid flow is presented to visualize the flow pattern in-terms of velocity, streamline and pressure distribution on the blade surface are graphically interpreted. The standard K-e turbulence model and the simple model algorithm were chosen for turbulence model and pressure distribution well determined. The simulation was steady Heat transfer and moving reference frame was used to consider the impeller interaction under high resolution. Furthermore, A computational Fluid Dynamics (CFD) 3-D simulation is done to analyze the impeller head and efficiency required of centrifugal compressor. The impeller is rotated for a constant revolution and mass flow rate, in this study initially the geometry of centrifugal compressor impeller is created by an ANSYS Vista CCD, and the Blade modeller done by Bladegen, Finally, CFD analysis was performed in ANSYS CFX using the ANSYS Turbo grid meshing tool. According to the analysis, as the number of impeller blades increases, so does the value of the head and power imparted, as well as the impeller's efficiency.

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Flow Simulation And Performance Analysis Of Centrifugal Compressor Using Cfd_Tool

Journal of University of Shanghai for Science and Technology, 2021

This paper is concerned the flow simulation and performance analysis of the Centrifugal Compresso... more This paper is concerned the flow simulation and performance analysis of the Centrifugal Compressor Using CFD – Tool. The complex internal flow of centrifugal compressor can be well analyzed, and the unique design system needs to be developed. It should be early to use the interface and also flexible for input and output. A 3-D flow simulation of turbulent – fluid flow is presented to visualize the flow pattern in-terms of velocity, streamline and pressure distribution on the blade surface are graphically interpreted. The standard K- e turbulence model and the simple model algorithm were chosen for turbulence model and pressure distribution well determined. The simulation was steady Heat transfer and moving reference frame was used to consider the impeller interaction under high resolution. Furthermore, A computational Fluid Dynamics (CFD) 3-D simulation is done to analyze the impeller head and efficiency required of centrifugal compressor. The impeller is rotated for a constant revo...

Download

Flow Simulation And Performance Analysis Of Centrifugal Compressor Using Cfd_Tool

Journal of University of Shanghai for Science and Technology, 2022

Download

WITHDRAWN: Numerical investigation of fluid flow simulation through a cylindrical shape orifice flow meter using Ansys-fluent software

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) systems using nanorefrigerant [R-134a + ZrO2] at steady-state

Journal of Mechanical Science and Technology, Nov 30, 2023

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) sy... more

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) systems using nanorefrigerant [R-134a + ZrO 2 ] at steadystate

Journal of Mechanical Science and Technology, 2023

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) sy... more

Download

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) systems using nanorefrigerant [R-134a + ZrO 2 ] at steadystate

Experimental investigation on performance enhancement of vapor compression refrigeration (VCR) sy... more

Download

Design and Simulation of Shell-And-Tube Heat Exchanger (Sthe) with the Effect of Baffles Using CFD-Tool

Zenodo (CERN European Organization for Nuclear Research), May 5, 2023

Download

Flow Simulation And Performance Analysis Of Centrifugal Compressor Using Cfd_Tool

Download

Flow Simulation And Performance Analysis Of Centrifugal Compressor Using Cfd_Tool

Journal of University of Shanghai for Science and Technology, 2021

This paper is concerned the flow simulation and performance analysis of the Centrifugal Compresso... more This paper is concerned the flow simulation and performance analysis of the Centrifugal Compressor Using CFD – Tool. The complex internal flow of centrifugal compressor can be well analyzed, and the unique design system needs to be developed. It should be early to use the interface and also flexible for input and output. A 3-D flow simulation of turbulent – fluid flow is presented to visualize the flow pattern in-terms of velocity, streamline and pressure distribution on the blade surface are graphically interpreted. The standard K- e turbulence model and the simple model algorithm were chosen for turbulence model and pressure distribution well determined. The simulation was steady Heat transfer and moving reference frame was used to consider the impeller interaction under high resolution. Furthermore, A computational Fluid Dynamics (CFD) 3-D simulation is done to analyze the impeller head and efficiency required of centrifugal compressor. The impeller is rotated for a constant revo...

Download

Flow Simulation And Performance Analysis Of Centrifugal Compressor Using Cfd_Tool

Journal of University of Shanghai for Science and Technology, 2022

Download

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