Browsing Department of Mechanical Engineering by Author "fb29792e-d605-4215-ac5b-0d1608584f03"
Now showing items 1-20 of 20
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Cooling potential for hot climates by utilizing thermal management of compressed air energy storage systems
Alami, Abdul H.; Orhan, Mehmet Fatih; Al Rashid, Rashid; Yasin, Ahmad; Radwan, Ali; Ayoub, Mohamad; Abdelkareem, Mohammad Ali; Alashkar, Adnan (Springer Nature, 2022)This work presents findings on utilizing the expansion stage of compressed air energy storage systems for air conditioning purposes. The proposed setup is an ancillary installation to an existing compressed air energy ... -
Design and analysis of an alkaline fuel cell
Azzam, Mohammed H. A.; Qaq, Zabayyan; Orhan, Mehmet Fatih (Yildiz Technical University, 2023)This study provides a step-by-step, up-to-date fuel cell fundamentals, thermodynamic and electrochemical principles, and system evaluation factors via a case study of a 10-kW alkaline fuel cell designed to operate in space ... -
Design and Comparison Analysis of Various Flow Configurations in Bipolar Plates via Numerical Simulation
Azzam, Mohammed H. A.; Qaq, Zabayyan; Orhan, Mehmet Fatih (Canadian Center of Science and Education, 2021)Bipolar plates play a major role in the overall performance of fuel cells, hence their proper design and optimization are essential. In this regard, pressure drop across bipolar plates has a major impact on the efficiency. ... -
Design and Optimization of Fuel Cells: A Case Study on Polymer Electrolyte Membrane Fuel Cell Power Systems for Portable Applications
Orhan, Mehmet Fatih; Saka, Kenan; Yousuf, Mohammad Hani (Wiley, 2022)Fuel cells are energy conversion devices that directly convert chemical energy of fuels such as hydrogen to useful work with negligible environmental impact and high efficiency. This study deals with thermodynamic analysis ... -
Design and Utilization of a Direct Methanol Fuel Cell
Ahmed, Aser Alaa Fathi Elsayed; Al-Lababidi, Malik Mamoun; Hamada, Ahmed T.; Orhan, Mehmet Fatih (MDPI, 2022)This study introduces a step-by-step, summarized overview of direct methanol fuel cell (DMFC) fundamentals, thermodynamic–electrochemical principles, and system evaluation factors. In addition, a parametric investigation ... -
Energy assessment of an integrated hydrogen production systemEnergy assessment of an integrated hydrogen production system
Shahin, Mohamed Shahin; Orhan, Mehmet Fatih; Saka, Kenan; Hamada, Ahmed T.; Uygul, Faruk (Elsevier, 2022)Hydrogen is believed to be the future energy carrier that will reduce environmental pollution and solve the current energy crisis, especially when produced from a renewable energy source. Solar energy is a renewable source ... -
Enhancement of the corrosion resistance of mild steel with femtosecond laser- nanostructuring and CrCoNi medium entropy alloy coating
Ahmad, Shahbaz; Ahmad, Waqas; Abu Baker, Aya; Egilmez, Mehmet; Abuzaid, Wael; Orhan, Mehmet Fatih; Ibrahim, Taleb; Khamis, Mustafa; Alnaser, Ali (Elsevier, 2022)In this work, the corrosion resistance of mild steel surface nanostructured with a femtosecond laser and coated with high corrosion resistant CrCoNi (CCN) medium entropy alloy through magnetron sputtering is studied. ... -
Evaluating velocity and temperature fields for Ranque Hilsch vortex tube using numerical simulation
Al Saghir, Ahmad Mohammad; Hamdan, Mohammad; Orhan, Mehmet Fatih (Elsevier, 2021)In this study, a three-dimensional numerical investigation is carried out to study the flow field inside a Ranque-Hilsch vortex tube (RHVT) model. Flow parameters such as velocity, temperature, and pressure are plotted at ... -
Evaluating velocity and temperature fields for Ranque Hilsch vortex tube using numerical simulation
Al Saghir, Ahmad Mohammad; Hamdan, Mohammad; Orhan, Mehmet Fatih (Elsevier, 2021)In this study, a three-dimensional numerical investigation is carried out to study the flow field inside a Ranque-Hilsch vortex tube (RHVT) model. Flow parameters such as velocity, temperature, and pressure are plotted at ... -
Exergy analysis of heat exchangers in the copper–chlorine thermochemical cycle to enhance thermal effectiveness and cycle efficiency
Orhan, Mehmet Fatih; Dincer, Ibrahim; Rosen, Marc (Oxford University Press, 2011)Most existing nuclear power plants in North America are typically water-cooled and operate at 250–500°C. For this temperature level, the copper–chlorine (Cu–Cl) cycle is one of the most promising cycles that can be integrated ... -
Fluid properties impact on energy separation in Ranque–Hilsch vortex tube
Al Saghir, Ahmad Mohammad; Hamdan, Mohammad; Orhan, Mehmet Fatih (Springer Nature, 2022)This paper examines the energy separation in vortex tubes which is a passive device that can split a pressurized room temperature gas stream to hot and cold streams. The paper employs numerical simulations to investigate ... -
Investigation of an integrated hydrogen production system based on nuclear and renewable energy sources: a new approach for sustainable hydrogen production via copper–chlorine thermochemical cycles
Orhan, Mehmet Fatih; Dincer, Ibrahim; Rosen, Marc (Wiley, 2011)Hydrogen production via thermochemical water decomposition is a potential process for direct utilization of nuclear thermal energy to increase efficiency and thereby facilitate energy savings. Thermochemical water splitting ... -
Melting performance of a composite bio-based phase change material: An experimental evaluation of copper foam pore size
Sheikh Mohammed, Yahya; Orhan, Mehmet Fatih; Azmeer, Ahmed (Elsevier, 2022)This paper presents an experimental study on the thermal performance of a composite heat sink consisting of a bio-based phase change material and copper foam. The experiments are carried out at three different heat loads ... -
Numerical Analysis of Film Cooling Shield Formed by Confined Jet Discharging on a Flat Plate
Al-Hemyari, Mohammed; Hamdan, Mohammad; Orhan, Mehmet Fatih (International Information and Engineering Technology Association, 2019)The effects of centrifugal force and thermal conductivity on the effectiveness of a film cooling shield are investigated in this study. A confined jet with 90 degree angle is used, to inject cooling fluid into hot steam, ... -
Numerical and sensitivity analyses of various design parameters to maximize performance of a Vortex Tube
Al Saghir, Ahmad Mohammad; Hamdan, Mohammad; Orhan, Mehmet Fatih; Awad, Mahmoud (Elsevier, 2022)In this study, a series of numerical simulations are performed to investigate the performance of a vortex tube (VT) with various design parameters. The study focuses on six design parameters, mainly, inlet pressure, VT ... -
Optimization of a Confined Jet Geometry to Improve Film Cooling Performance Using Response Surface Methodology (RSM)
Al-Hemyari, Mohammed; Hamdan, Mohammad; Orhan, Mehmet Fatih (MDPI, 2020)This study investigates the interrelated parameters affecting heat transfer from a hot gas flowing on a flat plate while cool air is injected adjacent to the flat plate. The cool air forms an air blanket that shield the ... -
Optimization of a Confined Jet Geometry to Improve Film Cooling Performance Using Response Surface Methodology (RSM)
Al-Hemyari, Mohammed; Hamdan, Mohammad; Orhan, Mehmet Fatih (MDPI, 2020)This study investigates the interrelated parameters affecting heat transfer from a hot gas flowing on a flat plate while cool air is injected adjacent to the flat plate. The cool air forms an air blanket that shield the ... -
Process simulation and analysis of a five-step copper–chlorine thermochemical water decomposition cycle for sustainable hydrogen production
Orhan, Mehmet Fatih; Dincer, Ibrahim; Rosen, Marc (Wiley, 2014)A process model of a five-step copper–chlorine (Cu–Cl) cycle is developed and simulated with the Aspen Plus simulation code. Energy and mass balances, stream flows and properties, heat exchanger duties, and shaft work are ... -
A Study and Assessment of the Status of Energy Efficiency and Conservation at School Buildings
Ragab, Karim Mohamed; Orhan, Mehmet Fatih; Saka, Kenan; Zurigat, Yousef (MDPI, 2022)The building sector consumes a significant portion of global energy use. In this regard, this work was undertaken to study the status of energy efficiency and conservation at a large school building in the northern part ... -
Variation in cooling performance of a bio-based phase change material by adding graphene nanoplatelets with surfactants
Sheikh Mohammed, Yahya; Orhan, Mehmet Fatih; Umair, Muhammed; Mehaisi, Elmehaisi; Azmeer, Ahmed (Elsevier, 2022)In this paper, thermal characteristics of various phase change materials induced with additives and surfactants are studied to enhance cooling properties and chemical stability. In this regard, graphene nanoplatelets at ...