Mustafa Yılmaz

• Doctor of Philosophy
• Professor (Associate) at Marmara University

This study aims to evaluate and optimize the influences of operational factors, including the engine’s rotational speed, methane mass, diesel mass, and the duration of injected diesel fuel on the methane/diesel reactivity-controlled compression ignition (RCCI) light-duty engine’s performance and emissions by executing the Nondominated Sorting Genet...

Carbon capture and utilization (CCU) technologies are crucial for reducing CO2 emissions from power plants and promoting environmental sustainability. This study focuses on the Besmaya Natural Gas Combined Cycle (NGCC) power plant in Baghdad, Iraq, using Aspen Plus software to simulate plant operation and establish a baseline. A post-carbon capture...

Reactivity-Controlled Compression Ignition (RCCI) is a highly promising dual-fuel, low-temperature combustion (LTC) technique for modern engines. This method allows for precise control of combustion by adjusting the in-cylinder fuel reactivity, leading to reduced nitrogen oxide (NO) and particulate matter (PM) emissions while maintaining high therm...

In the realm of Natural Gas Combined Cycle (NGCC) power plants, it is crucial to prioritize the mitigation of CO2 emissions to ensure environmental sustainability. The integration of post-combustion carbon capture technologies plays a pivotal role in mitigating greenhouse gas emissions enhancing the NGCC’s environmental profile by minimizing its ca...

As a consequence of the limited availability of fossil fuels, green energy is gaining more and more popularity. Home and business electricity is currently limited to solar thermal energy. Essential receivers in current solar thermal power plants can endure high temperatures. This ensures funding for green thermal power generation. Regular solar the...

In this study, a multigenerational hybrid system, which is consisting solar, geotermal and Organic Rankine Cycle (ORC) with working fluids R245fa, R245ca and the new generation fluid R1233zd, was simulated via a simulation software. After simulations, the results were analyzed and compared. According to these results, the highest system thermal eff...

Keywords: Sustainability, CCGT power plants, Solar-assisted carbon capture, post-combustion,decarbonization.

In this study, using the general survey model, which is one of the quantitative research methods, the evaluation of the occupational safety courses given in undergraduate departments in Turkey and their effects on working life were examined for 440 people who received their undergraduate education and started their working life. An appropriate samp...

In order to meet the energy demand and reduce the environmental pollution, it is necessary utilize photovoltaic (PV) module to produce electrical energy. There are many factors such as solar radiation, PV module material, wind energy, soiling factor, shading effect, geographical location, cell temperature is affecting the performance of the PV modu...

Homogeneous charge compression ignition (HCCI) is a combustion concept with significant potential due to low NOX, soot emissions, and high efficiency. However, the PPCI strategy has potential because the HCCI engine operates in a limited load range and is difficult to control due to lack of spark ignition or fuel injection. Early direct injection d...

Wind energy has been seen as one of the most suitable sources of renewable energy. Wind energy is low cost when compared the other sources. Therefore, wind energy can gain an edge over the fossil-fired power plants. Aerodynamic efficiency of the airfoil is very crucial for aerodynamic efficiency of the wind turbine. The primary purpose of our study...

In these studies, three important works examined to get ultra-low emission for a single cylinder diesel engine. The first study was performed for single fuel and compression ratio (CR), intake and exhaust valve timings, mass flow rate were optimized for a range of engine speed. Then for the same engine injection parameters such as start of injectio...

The main aims of Thermal Science is to publish papers giving results of the fundamental and applied research in different, but closely connected fields: fluid mechanics (mainly turbulent flows), heat transfer, mass transfer, combustion and chemical processes, in single, and specifically in multi-phase and multi-component flows, and in high-temperat...

In this study, the effect of ethanol in gasoline combustion engine has been investigated and optimized from emission and performance point. At the first level, the engine performance for pure gasoline fuel; then a mixture of ethanol and gasoline was used in which the amount of ethanol varies from 1% to 20 %. The engine speed was chosen 2000 rpm and...

With the increase of energy demand, many researchers tried to develop scientific approaches in order to design more efficient and environmentally friendly energy systems. Exergo-economic (thermoeconomic) analysis of a system or device is an efficient tool for evaluating the system in terms of the thermodynamic and economic aspects. Exergo-economic...

In this study, the exergy efficiencies of three rectangular copper non-enhanced surface microchannel heat sinks under single-phase flow conditions were analysed experimentally. De-ionised water was used as the working fluid. Three microchannel test sections with the same hydraulic diameter (Dh = 0.56 mm) and length (L = 62 mm) but different aspect...

In many countries, buildings consume more energy than transport and industry. Building designs and materials have a significant effect on the energy consumed for a select set of end uses. The importance of energy efficiency in building sector is especially significant in developing countries, owing to rapid new construction with opportunities to em...

In recent years, automotive companies and research centers have utilized different techniques to ensure tightened emission rules. These studies generally are divided into two main categories: in-cylinder and after-treatment applications. In the first stage, harmful exhaust emissions were decreased by optimizing engine parameters. After-treatment ap...

In recent years, automotive companies and research centers have utilized different techniques to ensure tightened emission rules. These studies generally are divided into two main categories: in-cylinder and after-treatment applications. In the first stage, harmful exhaust emissions were decreased by optimizing engine parameters. After-treatment ap...

In this study, experimental outcomes from a Spark ignition engine (SI) which fueled with E1 to E20 (Percentage of alcohol content in total fuel blend is various between 1% and 20%) were collated with recital of combustion codes for one dimensional analysis.1-D codes, which is called SRM-Suite (Stochastic Reactor Model) and Chemkin-Pro, were estimat...

For sustainable development, a reduction in energy demand is essential. This could be achieved through improving energy efficiency, effective energy conservation and management. The weather conditions of a given region are the most important considerations for the proper design of space AC systems. In this study, The typical meteorological year and...

The purpose of this study is to investigate the thermal performance of heat recovery system with gravity assisted heat pipe charged R134a and R410A working fluids and also determine the usefulness of heat pipe bundle system in heat recovery applications. For this purpose an experimental test rig was designed and built. Series of experimental tests...

It is aimed to reduce fuel consumption and vehicle-sourced emissions, combat global warming and contribute to the economy via car window film implementation. Mobile air conditioning (MAC) usage in summer increases fuel consumption and vehicle emissions, which has global economic and health impacts. In summer, films block solar radiation into cabin,...

In this study, experimental outcomes from a Spark ignition engine (SI) which fueled with E1 to E20 (Percentage of alcohol content in total fuel blend is various between 1% and 20%) were collated with recital of combustion codes for one dimensional analysis.1-D codes, which is called SRM-Suite (Stochastic Reactor Model) and Chemkin-Pro, were estimat...

The aim of this study is to find out the optimum operating conditions in a diesel engine fueled with compressed biogas (CBG) and pilot diesel dual-fuel. One-dimensional (1D) and three-dimensional (3D) computational fluid dynamics (CFD) code and multiobjective optimization code were employed to investigate the influence of CBG-diesel dual-fuel combu...

Aimed Contribution—Fuel economy via car window film implementation will also reduce vehicle-sourced emissions, health and welfare impacts associated with those emissions; thus, contribute to the economy. Focused Problem—During summer, solar irradiation heats up the car and Mobile Air Conditioning (MAC) usage becomes essential. Moreover, MAC usage r...

The aim of the present project is to obtain an efficient turbine blade profile for the related Solar chimney prototype. Solar chimney power plant is a thermal system which has a quite different working principle than conventional thermal systems produces electric energy from the solar energy shown in Figure1. It has three basic physical working pri...

Aimed Contribution: Via simple and applicable car window filming alternative, it is aimed to reduce vehiclesourced emissions and fuel consumption; thus, contribute to the economy eventually. Focused Problem: The exposure of solar radiation especially in summer, rise the car cabin soak temperature so high that the usage of mobile air conditioning (M...

LED lightening especially in outdoor lightening becomes gradually most favourite lightening system around of the world. In this study a street type high power LED armature is modelled and thermal analysis is performed. Fine mesh is applied to model by using a specific program according to finite volume method. Then, its energy and heat analysis are...

Renewable energy as one of the current and substantial issue needs to be investigated in terms of political outlook. So the researches on renewable energy policies under the energy policies of different countries are necessary. The emergence of renewable energy policy was the 20th century but it gained momentum in 21st century. The realization of t...

Homogenous charge compression ignition (HCCI) cases are compared for improvements on the combustion chamber design of the engine to achieve near zero particulate matter (PM) and NOx emissions. Therefore combustion simulations of the engine have been performed to find out emission generation in the cylinder. The interaction of air motion with high-p...

2009 yılı itibarıyla Avrupa’da 500 milyon nüfus ve bu nüfusa karşılık 230 milyon araç bulunmaktadır [1]. Bu rakamlar Avrupa’da her 1000 kişiden 460’ının araç sahibi olduğunu göstermektedir. Lüksemburg, İzlanda ve Yeni Zelanda gibi ülkelerde bu oran 600 aracın üzerindedir [2]. 2010 yılı itibariyle 6.8 milyarlık dünya nüfusuna karşılık toplam taşıt m...

Renewable energy stands as the future’s main energy resources with its environment friend and everlasting nature. The importance of renewable energy sources cannot be overlooked in the 21th Century. It is a prerequisite to utilize from renewable energy source in the energy mix of the countries. From this point of view as one of the important initia...

Renewable energy as one of the current and substantial issue needs to be investigated in terms of political outlook. So the researches on renewable energy policies under the energy policies of different countries are necessary. The emergence of renewable energy policy was the 20th century but it gained momentum in 21th century. The realization of t...

Abstract. In this work, cold flow simulations of a six cylinder nine lt diesel engine have been performed to find out flow development and turbulence generation in the piston-cylinder assembly. Various turbulence models have also been tested and results have been compared. In this study, the goal is to understand the flow field and the combustion p...

Nowadays, automotive industries focused on clean diesel combustion in their combustion processes are investigated for their potential to achieve near zero particulate and NOx (Nitrogen oxides) emissions. Their main disadvantages are increased level of unburned hydrocarbons (HC) and carbon monoxide (CO) emissions, combustion control at high load, po...

Detailed investigations of cold flow, spray and combustion phenomenon for a heavy-duty CI engine were performed. Three conventional type diesel engine cases and four Partially Premixed Compression Ignition (PPCI) type diesel engine cases performed. The cases were prepared by changing the parameters: start of injection, spray angle and spray profile...

The goal of this study is to find out effects of the injection parameters on the combustion process for a single cylinder of a nine-liter six cylinder diesel engine. Partially premixed compression ignition (PPCI) cases are compared for improvements on the combustion chamber design of the engine to achieve near zero particulate matter (PM) and NOx e...

The goal of this study is to find out effects of the injection parameters on the combustion process for a single cylinder of a nine-liter six cylinder diesel engine. Partially premixed compression ignition (PPCI) cases are compared for improvements on the combustion chamber design of the engine to achieve near zero particulate matter (PM) and NOx e...

In this investigation, a semi-empirical equation is developed to predict the collapse rate of steam bubbles injected through an orifice into subcooled water. The equation considers both bubble distortion and the heating of the liquid around the condensing bubble. The theoretical predictions correlate experimental data reasonably well.

Power need, increased with improved technology and population, made renewable resources much more important. One of these renewable energy resources is produced by processing waste product. There are many parameters (type of waste product, temperature, mixing, pH, waiting time, etc.) affecting the performance of biogas production. One of the import...

It is estimated by the experts in the automotive industry that diesel engines on the transport market should increase within the years to come due to their high thermal efficiency coupled with low carbon dioxide (CO2) emissions, provided their nitrogen oxides (NOx ) and particulate emissions are reduced. At present, adequate after-treatments, NOx a...

In this study, the goal is to understand the flow field and the combustion process in order to be able to suggest some improvements on the in-cylinder design of an engine. Therefore cold flow simulations of a six-cylinder nine-liter diesel engine have been performed to find out flow development and turbulence generation in the piston-cylinder assem...

The characteristics of continuous, steady granular flow through a flat-plate orifice have been experimentally investigated. In particular, the normal stress exerted on the orifice plate has been measured by the normal stress gauge which consists of a strain gauge attached to a cantilever beam. The cantilever beam supports the orifice plate which is...

The discharge of glass beads from axisymmetric hoppers was experimentally investigated. Two types of hoppers were employed: one was of conical hoppers with different angles and the other was nozzle-shaped. The result showed that, for a conical hopper with a hopper angle greater than 45°, the hopper angle had little effect on the discharge coefficie...