Mustafa Atmaca

Mustafa Atmaca
Marmara University · Department of Mechanical Engineering

Professor

About

59
Publications
54,950
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
284
Citations
Additional affiliations
January 1994 - present
Marmara University
Position
  • Professor

Publications

Publications (59)
Article
Full-text available
Nozzles are widely used to control the rate of flow, speed, direction, mass, shape and pressure of the stream in connection with many different engineering applications. This paper presents the performance predicted by a computational fluid dynamic (CFD) model, which are 3D models that utilize parametric analysis, realizable k-epsilon turbulence mo...
Article
Full-text available
In buildings today, there is also a need of thermal energy, besides electrical energy. Hot air and hot water are forms of thermal energy that can be used in buildings. PV/T systems help produce these shapes of energies with the use of solar power. In this study, the supply of the required energy in buildings produced by a PV/T system, using two wor...
Article
Full-text available
Günümüzde enerji ihtiyacımız giderek artmaktadır ve enerji üretimi için birçok sistem geliştirilmiştir. Çevreyi korumak adına temiz ve yenilenebilir enerji giderek önem kazanmıştır. Bu sistemlerden en çok kullanılanı güneş enerjisinden elektrik enerjisi üretmemizi sağlayan fotovoltaik (PV) sistemleridir. PV sistemleri zamanla gelişerek, elektrik ür...
Conference Paper
Enerjinin ekonomik ve sosyal refahın önemli belirtilerinden biri olması, hayat kalitesinin arttırılmasında önemli bir rolü olduğu bilinmektedir. Özellikle gelişmekte olan ülkelerde artan nüfus, sanayileşme ve teknolojik gelişmelerden dolayı enerjiye olan talep giderek artmaktadır. Bu artış ile ülkeler enerjiye kolay, ucuz ve kesintisiz bir biçimde...
Conference Paper
Enerjiye olan talep gelişen teknoloji ve artan nüfus yoğunluğu ile her geçen gün artmaktadır. Enerji harcanması kolay ancak üretimi zor olduğundan dolayı, firmalar enerji tüketen cihazlarında ( özellikle kullanımı zaruri ev aletlerinde ) her zaman daha az enerji tüketimi ile erişilebilecek maksimum fayda sağlayabilecek teknoloji ve sistemlere yönel...
Presentation
Full-text available
Energy has become an indispensable part of our lives in today's world where technology is developing. In addition, the rapid depletion of our natural resources, the deterioration of the ecological balance with environmental pollution and the high cost of energy production, force us to be more sensitive about the efficient and efficient use of energ...
Article
Full-text available
The temperature of a PV (photovoltaic) panel increases when it produces electricity but its electrical efficiency decreases when the temperature increases. In addition, the electrical efficiency of the PV panel is very limited. To increase the PV efficiency, the rest of the solar irradiance must be used, together with the temperature being kept at...
Article
Full-text available
Steam ejectors are one of the key components of steam ejector refrigeration/heat pump systems. Steam ejector is required to compress low-pressure stream to a higher pressure. Steam ejectors have no moving part, a simple structure, low cost, reliability, easy installation, high vacuum performance, corrosion resistance, and no consumption of electric...
Article
Full-text available
In recent years, the use of unmanned aerial vehicles has increased rapidly. These vehicles have instant detection, tracking and destruction capabilities in military operations. In addition, when compared other conventional aerial vehicles, in the case of the vehicles down, any loss of driver life can be accounted for the most important factor in th...
Article
Full-text available
Converting energy sources into electrical energy is as important as gaining energy. After producing natural gas, which is one of the most common energy sources and classified as fossil fuel, it is sold by the natural gas and petrol companies to the world by compressing it in the compressor stations. Gas companies compress incoming gas which is lost...
Article
Full-text available
The air leakages through the air ducts of air conditioning and ventilation systems applied to residential, commercial, and industrial buildings cause higher energy consumption costs, less thermal comfort, and worsening of internal air quality. Also, the leakages affect the design parameters of air conditioning and ventilation systems negatively. Th...
Article
Full-text available
This paper aims to describe the numerical simulation of a three-dimensional turbulent free jet issuing from circular, triangular (equilateral), ellipse, square, rectangle, pentagon and hexagon orifice into still air. The numerical simulation was carried out by solving the governing three-dimensional Reynolds-averaged Navier-Stokes equations. Renorm...
Article
Full-text available
In this study, prototype product cooling chamber which has 1 m³ volume have been designed. This cooling chamber is suitable Eurovent SC2 conditions and works between 0° C and +4° C. The system was run with electricity obtained by means of photovoltaic solar panels. Comparison of efficiency was made between cities of Istanbul and Mersin which are di...
Article
Full-text available
In this study, thermal comfort properties of woolen fabrics depending on the physical properties have been investigated. Thermal and water vapor resistance of fabrics have been measured by the PERMETEST instrument and air permeability has been investigated in a wind tunnel. The air permeability depends on the shape and value of the pores and inter...
Conference Paper
Full-text available
The aim of this study is to investigate flow characteristics around open jet with different outlet area (circular, ellipse, triangle, square, rectangle, pentagon, hexagon) as experimental and numerically. Experimental studies were performed in air flow unit. Air velocity and turbulence measurements were carried out with hot wire probe which is modu...
Article
Diesel evaporators are one of the key components of diesel fuel processing for fuel cells. Diesel evaporator is required to evaporate diesel fuel in diesel fueled fuel cell systems. In this study, diesel evaporator which is a spiral-tube heat exchanger via indirect heat supplied by hot nitrogen gas is modeled and the fractional distillation curve r...
Conference Paper
Full-text available
In this study, prototype product cooling chamber which has 1 m³ volume have been designed. This cooling chamber is suitable Eurovent SC2 conditions and works between 0°C and +4°C. The system was run with electricity obtained by means of photovoltaic solar panels. Comparison of efficiency was made between cities of Istanbul and Mersin which are diff...
Conference Paper
Full-text available
Article
Full-text available
Cogeneration systems and equipment suitable for residential and small-scale commercial applications like hospital, hotel or institutional building are available, and new systems have developed. These products are used or aimed for meeting the electrical and thermal demands of a building for space and domestic hot water heating. In last years cogene...
Article
Permeability and porosity of woolen fabrics are investigated experimentally in this paper. Permeability experiments are conducted in a wind tunnel to the TS 391-EN ISO 9237 standard. Woolen fabric is placed in the test section of the wind tunnel to measure permeability to airproofing . Velocity measurements are made used a hot wire anemometer in th...
Conference Paper
Full-text available
Numerical results are compared with experimental results for z/d=0 and x/d=0.125, 0.5, 1.25. Abstract The flow characteristics over a sphere are predicted numerically. Experimental studies have been done in a low speed wind tunnel. In order to verify numerical results velocity and turbulence intensity measurements were done in centerline of sphere....
Conference Paper
Full-text available
Conference Paper
Full-text available
In this study, three different woolen fabric samples having the same weight, composition and different thickness values have been investigated in terms of thermal comfort properties. Firstly, porosity of the fabrics has been calculated by using the warp/weft yarn counts and density values according to the theoretical model with cover factor. Then,...
Article
Full-text available
In this study, in order to evaluate the solar energy potential of the South Eastern Anatolia Region, the use of photovoltaic systems for irrigation were examined. With electrical energy produced from solar energy depending on the photovoltaic (PV) principle, in case of supply of necessary mechanical energy for the operation of submersible pump, som...
Article
Full-text available
In this study, the differences between the old and new public buildings were investigated in terms of energy efficiency. Measurements carried out old and new in two different faculty buildings were presented located on of Marmara University Goztepe Campus. Indoor and outdoor temperature measurements were implemented. Measurements were taken hourly,...
Article
In this study, renewable and non-renewable energy sources for the Manisa city are set by existing power plants and specified. Energy policies evaluating the SWOT analysis was carried out in the context of a variety of criteria with Edward Deming Cycle. At the end, the specific energy policies are discussed on the city and the recommendations are gi...
Article
Full-text available
In this study, renewable and non-renewable energy sources for the Manisa city are set by existing power plants and specified. Energy policies evaluating the SWOT analysis was carried out in the context of a variety of criteria with Edward Deming Cycle. At the end, the specific energy policies are discussed on the city and the recommendations are gi...
Conference Paper
Full-text available
In this study, carbon black (CB) nanoparticles, treated by nitric acid solution, were added to chemical oxidative polymerization process of the aniline on polyester fabric surfaces. Ammonium peroxydisulfate (APS) was used as dopant agent. These composite fabrics were prepared by using various APS concentrations in order to see the effects of dopant...
Conference Paper
Full-text available
The concept of fast fashion, forcing the textile and apparel markets to produce new products constantly, also intertwined business and private life have been raised the expectations of consumers from a clothing. Now consumers are asking for clothes both comfortable and suitable for any environment. This condition has caused the denim products, call...
Conference Paper
Full-text available
Besides durability, design and fashionable, also, today fabric handling and comfort of a cloth are becoming into prominence. In general, consumers prefer a ready-made product by looking its softness-stiffness, hand, glossiness, and drape in other words its comfort properties. Nowadays, denim fabric has been gained a great importance considering its...
Conference Paper
Full-text available
In this study, velocity and turbulence variations were investigated detail around open jet with different section exit area (triangle, square, rectangle). Air velocity and turbulence measurements were carried out with hot wire probe which is module multifunctional measurement equipment. Reading values were transferred to computer with software. Exp...
Conference Paper
Full-text available
Drag coefficients of circular and elliptical cylinders are examined both experimentally and numerically in this study. Experimental works have been conducted in a subsonic suction type wind tunnel. Velocity profiles in the wake regions of a cylindrical body with 6mm in diameter were measured using a hot wire anemometer. The velocity profiles were u...
Article
Full-text available
In this study, energy and exergy analysis of a direct injection compression ignition engine converted into dual fuel systems using different composition of mixed fuel formed from natural gas and diesel were performed. Effects of parameters, such as composition of mixed fuel, engine load, and speed, on various energetic and exergetic performance par...
Conference Paper
Full-text available
The acceptability of a textile fabric largely depends on the comfort properties which involve thermal properties, air permeability and water vapor permeability etc. In this study, the effects of interlining on the air permeability, thermal conductivity, and crease recovery angle properties of wool fabrics were investigated. As fabric, four differen...
Conference Paper
Full-text available
Diyarbakir history goes back to that the year 3000 BC was known previously, as a result of research conducted recently by the excavations Cayonu 7500 BC history of civilization goes back to that the years are identified. With such a deep-rooted history in Upper Mesopotamia, many civilizations that have existed in these lands, and again have been ta...
Article
Full-text available
Model studies of the internal combustion engine cycles are useful for illustrating some important parameters affecting engine performance. The Diesel cycle is considered as a special case of an internal combustion engine. In the diesel cycle, combustion is controlled in order to obtain constant pressure at the beginning of the expansion stroke. It...
Article
Full-text available
This paper is experimentally investigated, and developed a numerical model for predicting, wind loads on roofs with various geometries. Using computational fluid dynamics simulation, several turbulence models were compared (k-ε, RNG, Grimaji, Baldwin-Lomax zero-equation, New k-ε, Shi-Zhu-Lumley). The Baldwin-Lomax turbulence model resulted in the m...
Article
Full-text available
Increasing demand of energy and adverse environmental impact of the use of fossil fuels emphasized the need of using renewable energy. At this stage, cogeneration has come into question. Cogeneration, also called combined heat and power, is a consecutive generation of electrical power and heat energy. It is an efficient and cost-effective means to...
Article
Full-text available
In this paper, finite-time thermodynamic analysis of an air-standard internal--combustion dual cycle is performed. Maximum power, maximum power density, and maximum efficient power, which are three alternative performance criteria, are derived. The effects of the design parameters such as volume ratio and ex-treme temperature ratio of the cycle hav...
Article
Full-text available
In this article, power and efficiency analysis of irreversible Brayton cycle, which is one of the well-known heat engine cycles by the undergraduates, are carried out based on alternative criteria. Power, power density, and efficient power optimizations are also realized and the thermal efficiencies of the cycle are determined at maximum power and...
Article
Full-text available
In this study, an exergy optimization has been performed for a cogeneration plant consisting of an irreversible Carnot heat engine. In the analysis, different objective functions have been defined based on alternative performance criteria and the optimum values of the design parameters of a cogeneration cycle were determined for different criteria....
Article
Full-text available
The proper optimization criterion to be chosen for the optimum design of the heat engines may differ depending on their purposes and working conditions. In this study, a comparative performance analysis is carried out for a reversible Otto cycle based on three alternative performance criteria namely maximum power (mp), maximum power density (mpd) a...
Article
Full-text available
The present study investigates the thermal conductivity, permeability and mechanical properties of sintered stainless steel foams for different applications. Stainless steel foams were produced using fine prealloyed precipitation-hardened stainless steel powder with a water-soluble pore former of nearly 100-fold larger size. Structural foams with p...
Article
Full-text available
Interest in vegetable oil as an alternative to diesel fuel in diesel engines has increased during the last few decades because reserves of petroleum fuel and its derivatives are diminishing rapidly, and because they have harmful effects on the environment. In this study, hazelnut (Corylus avellana L.) kernel oil was evaluated as an alternative fuel...

Network

Cited By