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

Research Projects

  • 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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