Researches

The researcher has many breakthroughs in the framework of university-industry cooperation and has been refereeing and observing various TEYDEB projects. At the same time, the researcher conducts many scientific research projects supported by BAP and TUBITAK. In international and nationally respected journals, many scientific studies of the researcher have been published in the fields of energy, thermodynamics and fluid mechanics. His main research interests can be listed as flow dynamics in pipeline systems, flow dynamics in packed beds, flow measurement and calibrations, time dependent pipe flows, transition from laminar regime to turbulence in time dependent pipe flows, waste-to-energy, renewable energy and fluidized beds.

The scientific studies he has conducted in recent years are briefly summarized below:

  • Experimental investigation of retarding of passage to turbulent regime at different oscillation frequencies and velocity amplitude ratios in pulsatile pipe flows
  • Analysis and optimization of energy consumption in terms of thermodynamic and thermoeconomic aspects in HVAC applications
  • Experimental analysis on pressure drop and flow dynamics through packed beds utilized for flow conditioner and filtration
  • Thermodynamic, thermoeconomic analysis and optimization of municipal solid waste plants; developed models for these plants
  • Increasing of overall efficiency of power plants operating with natural gas and coal, zero discharge approach
  • Investigation of thermal conductivity coefficients of thermal insulation materials developed from natural stones
  • Investigation of flow dynamics at different geometries of adapters while passing through different cross-sectional area in pipe flows
  • Design, production and experimental analysis of a spout-fluidized bed (TAY) incineration system with the purpose of wastewater sewage sludge combustion with coal

Research Interests

  • Flow Dynamics in Packed Beds
  • Steady and Time-Dependent Pipe Flows
  • Laminar to Turbulent Transition in Time-Dependent Pipe Flows
  • Pulsatile Flow Dynamics
  • HVAC Systems
  • Flow Measurements and Calibrations
  • Pneumatic Conveying Pipeline Systems
  • Pipeline Engineering
  • Thermodynamics
  • Insulation
  • Thermodynamic Analyses through Systems
  • Hybrid Renewable Systems
  • Fluidized Bed Drying
  • Solid Waste Treatment
  • Waste to Energy
  • Incineration Techniques of Sewage Sludge
  • Sewage Sludge

Projects

  • Design, Development, Implementation and Assessment of Skill Formation Process in the Frame of VET for R&D Staff

    Erasmus + Program Vocational Education Strategic Partnerships KA202, 2018-1-TR01-KA202-059252

    Project Name: Design, Development, Implementation and Assessment of Skill Formation Process in the Frame of VET for R&D Staff
    Consolidator: Republic of Turkey Ministry of Foreign Affairs, Presidency of the European Union, Center for European Union Education and Youth Programs, Vocational Education Coordinator

    Project No: 2018-1-TR01-KA202-059252
    Start/Due Date: 01.09.2018/31.08.2021 (Ongoing)
    Position: Coordinator

     

    Abstract

    In today’s world, the importance of research and development (R&D) is a non-contestable matter. Especially in industry and technology sectors; developing competitive advantages, establishing sustainability and reaching goals in terms of innovation highly depend on R&D.

    When the context of developing countries all over the world is taken into consideration, R&D, patent and advanced technology indicators show that their competitiveness in terms of knowledge-based production is not at the desired level and that applies to Turkey as well. There may be several factors to that; however engineers’ inadequate level of education on R&D stands as a crucial fact. To make it clear, engineers who are employed in R&D centers generally have only bachelor degree which does not contain any specific training on R&D. In other respects, there are a critical number of engineers who reside as refugees in Turkey and the crucial need for R&D training has gained validity for them too.

    Newly graduate engineers generally choose two career paths; the first choice is mostly seeking jobs in industry or private sector and the second choice is the struggle to take place in the academic community. The first group of engineers usually has difficulties during the basic stages of an R&D work; such as literature review, patent scanning, developing new ideas, evaluating the feasibility of an R&D project…etc. Unfortunately, these engineers are not equipped with adequate knowledge and this is a common problem among engineers working in private sector. Moreover, this problem leads to an insufficient level when it comes to product development (P&D) and R&D. Because of the intense workload in private sector, these engineers do not have the chance to receive higher education. The second group of engineers, on the other hand, obtains R&D culture during the later stages of their post-graduate and/or doctorate studies empirically. Besides, academicians’ works on R&D mostly lie within a scientific frame and do not come up with an industrial field of application. One of the primary reasons of this issue is the non-existence of a specific R&D training within undergraduate education curricula; so as the proverbial saying states ‘as the twig is bent, so is the tree inclined’. As this problem results in of-poor-quality R&D works both in industry and academia, it undermines technological/innovative development. This situation applies not only to the context of Turkey but also to the contexts of many countries.
    In the light of all the facts mentioned above and for the sake of remedying the stated deficiency, the project will be designed to fulfill the critical need for R&D engineering training. The aim of the project is establishing an e-platform and an e-learning program. E-platform will be designed as an interactive meeting point for R&D engineers to collaborate with each other. E-learning program will provide the necessary technical and systematic knowledge needed for R&D activities as a series of multi-level educational software.
    The activities during the implementation stage of the project can be listed as:
    – Needs analysis
    In the course of the needs analysis, determination of the gap between engineering education and the necessary skills for R&D and P&D practices will be tried. The main problems in this area will be identified in the sector. Existing successful post-university online training applications will be examined. After the examination, knowledge, skills and learning objectives of the program will be determined and a measurement system will be developed.
    – Preparation of course content and curriculum following the needs analysis
    We foresee a blended approach in which team projects, video learning modules, readings and simulations take place. Applications will be at the core of the program. Trainees will feel the need to use the content to be able to perform applications. We prefer that the applications trigger a learning need, rather than the content being consumed and then turned into practice. Principles of adult education will be an important point to be considered about the design of the program. After all, the most important reason that the university education cannot fill the gap in terms of the necessary skills is the students are burdened with theoretical knowledge and they are expected to turn this into practice on their own. As a curriculum philosophy, we plan to put the application right in the center as an opposite approach.
    – Development of the e-learning program
    – Development of the e-platform
    The sole purpose of the program will be forming a community and supporting the attendants to learn from each other. Meanwhile, the know-how that will be established on the platform will be used to develop the platform during the following stages.
    – Providing pilot-scheme trainings
    Those who complete pilot trainings will be followed in the sector. Future improvements of the program will be made by uncovering the areas emerging in the sector that are open to development at the level of knowledge and skills.
    The project will make contribution to the human resources employed in R&D centers within industry and private sector in terms of developing detail-oriented, productive, innovative and technophile mentalities. On the academic community side, the project aims to improve analytical, experimental, systematic research and P&D skills of the academicians.

  • An Investigation of Renewable Energy Potential of Municipal Biodegradable Solid Waste Plants in frame of Thermodynamic, Thermoeconomic Analysis and Optimization and Developing Sustainable Models using Zero Waste Approach

    TUBITAK, The Scientific and Technological Research Council of Turkey

    Project Name: An Investigation of Renewable Energy Potential of Municipal Biodegradable Solid Waste Plants in frame of Thermodynamic, Thermoeconomic Analysis and Optimization and Developing Sustainable Models using Zero Waste Approach
    Consolidator: TUBITAK, The Scientific and Technological Research Council of Turkey
    Project No: 114M142
    Start/Due Date: 01.11.2014/01.11.2016 (Ongoing)
    Position: Coordinator

     

    Abstract

    Nowadays, there are incredible changes in supply-demand balances of energy production by means of energy production from waste and using renewable energy sources. The strategies based on the development of sustainable waste sources and energy recovery are consisted of production, collection, usage and final elimination stages. Adverse effects taken place on the environment during the life cycle of these stages can be eliminated by means of recycling technologies. The importance of waste recycling and elimination facilities is well understood in the case of approaching to the waste as both pollution and energy-raw material source. The necessity for the management of waste which creates main environmental concerns has caused the development of various types of waste management systems, worldwide. The main aim of the studies being made on elimination of wastes is to be able to choose the best method which has the least cost and risk to both human being and environment. The basic waste management strategies can be classified as waste elimination, energy recovery, recycling, waste minimization or avoiding, and zero waste approach.

    Zero waste approach is based on reassessment of wastes and in this way, minimization of damage of wastes on the environment by increasing energy recovery potential of current systems. The first step of zero waste management is to be able to figure out all waste constituents in waste elimination facility and also how to eliminate these wastes in order to perform an adequate environmental management. The second step is to integrate the appropriate proposed energy recovery models to current systems according to the present waste elimination techniques. At last step, recovered energy is provided for usage in waste storage plants and/or in energy dense sectors. Zero waste approach can be evaluated as a management style which provides a favorable cost gain with low payback period and increases the current operational efficiency of the facility in long term.

    In this project, first, thermodynamic and thermoeconomic analyses and optimization of Gaziantep Metropolitan Municipality Solid Waste Storage, Biogas and Cogeneration Plant will be performed using its operational and economic data. Then, energy recovery models in the frame of zero waste approach will be proposed using available waste heat sources of the current plant. After the detailed simulation studies of the proposed models, a comparative thermodynamic and thermoeconomic analyses and optimization will be done. The main aim of this study is to be able to figure out a sustainable and environmentally friendly waste management policy which can be applied to all solid waste storage, biogas and cogeneration plants in Turkey, by determining the optimum energy recovery strategies that can be integrated to current facilities. In the scope of the proposed models, increasing the energy recovery potentials of current solid waste storage facilities and reducing the environmental emissions are  aimed to contribute to health of both human and environment by means of a rational zero waste management strategy.

    In accordance with the modeling, analyses and assessments to be performed in this study, the energy recovery potential from solid waste in Turkey will be presented; the place and importance of energy from waste among other renewable energy sources will be emphasized; and lastly, a rational strategy will be developed by means of the proposed models in order to apply zero waste approach to current facilities.

  • Design, Manufacturing and Experimental Analysis of an Industrial Fluidized Bed Dryer System Operated under Atmospheric Pressure in order to Provide High Quality Products and Energy Saving During the Drying Process of Legumes

    University of Gaziantep Bilimsel Araştırma Projeleri Yönetim Birimi

    Project Name: Design, Manufacturing and Experimental Analysis of an Industrial Fluidized Bed Dryer System Operated under Atmospheric Pressure in order to Provide High Quality Products and Energy Saving During the Drying Process of Legumes
    Consolidator: University of Gaziantep Bilimsel Araştırma Projeleri Yönetim Birimi
    Project No: MF.13.06
    Start/Due Date: 22.07.2013/22.07.2015 (Completed)
    Position: Coordinator

     

    Abstract

    A batch type fluidized bed dryer is designed and constructed in order to investigate experimentally the effects of particle mass, drying air temperature and drying air velocity on drying performance of new harvested corn and pistachio in this study. A series of experiments is carried out in the covered range of 100 g≤mp≤300 g, 7 %≤MC(d.b.) ≤186 %, 7 %≤MC(w.b.) ≤65 %, 0.08≤MR≤1, 50 °C≤T≤75 °C, 6.87 m/s≤Um≤10.86 m/s, 47632≤Re≤75296, 43 Pa≤∆Pbed≤277 Pa, 60 Pa≤∆Pplate ≤300 Pa. The velocity, pressure, temperature and moisture measurements are performed. The acquisition and processing of the measured pressure data are carried out by means of the devised program PressureMeasurement.vi in LabView 2009-SP1® environment.

    An original model is proposed in order to utilize the thermodynamic analyses of drying process inside a batch type fluidized bed dryer. The effect of drying air velocity at constant drying air temperature, the effect of drying air temperature at constant drying air velocity and the effect of particle mass on drying performance such as drying time and drying rate are researched. It is concluded that increase in particle mass causes in increase in drying time. On the other hand, increase in drying air velocity and drying air temperature cause in decrease of drying time.

  • An Experimental Analysis of Laminar-Turbulent Transition in Time Dependent Pipe Flows

    University of Gaziantep Bilimsel Araştırma Projeleri Yönetim Birimi

    Project Name: An Experimental Analysis of Laminar-Turbulent Transition in Time Dependent Pipe Flows
    Consolidator: University of Gaziantep Bilimsel Araştırma Projeleri Yönetim Birimi
    Project No: MF.09.09
    Start/Due Date: 09.03.2010/09.03.2012 (Completed)
    Position: Researcher

     

    Abstract

    The detection of transition to turbulence in sinusoidal pulsatile pipe flow and the flow dynamics at the onset of transition are analyzed in this study. The experimental study is conducted in the ranges of the time averaged and oscillating Reynolds numbers of 1019≤Reta≤4817 and 107≤Reos≤4261. The velocity amplitude ratio of 0.05≤A1≤0.96 and oscillation frequency of 0.1 Hz≤≤14 Hz corresponding to Womersley numbers of 2.72≤√ω´≤32.21 cover the so-called intermediate region of pulsatile flow. The generation and control of the pulsatile flow, the acquisition and processing of the measured data and the analyses of the flow dynamics are carried out by means of the devised program, TDFC.vi in LabView 2009-SP1 environment.

    An original detection method is devised in TDFC.vi instead of the transition detection by visual observation in velocity waveforms, cited in the literature. Two dimensionless, dynamic turbulence detection parameters, , of R(dU(r,t)/dt)2/(Utavω)2 for f ≤1 Hz and (dU(r,t)/dt)2/(Uta2ω2) for f >1 Hz are defined. Moreover, two dimensionless, dynamic threshold parameters, , of (1/√ω´)2 (n=| f |) for f≤1 Hz and (1/√ω´)4 for f>1 Hz are defined as a function of √ω´. The detection is based on the comparison of the magnitudes of  and .

    It is concluded that there is a distinct difference in flow dynamics for √ω´≤8.61 and √ω´>8.61. Namely, at the onset of transition, despite of the noticeable influence of A1 on Reta for √ω´≤8.61, no effect of A1 is observed for √ω´>8.61. There is no effect of √ω´ on Reta for A1=0.10 and A1=0.20 although the significant effect of √ω´ on Reta is observed for A1>0.30 at the onset of transition.

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