Yazar "Cagman, Selman" seçeneğine göre listele

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    Energy and exergy analysis of an organic Rankine cycle in a biomass-based forest products manufacturing plant
    (Tubitak Scientific & Technological Research Council Turkey, 2016) Eyidogan, Muharrem; Canka Kilic, Fatma; Kaya, Durmus; Ozkaymak, Mehmet; Coban, Volkan; Cagman, Selman
    In this study, energy and exergy analysis of anorganic Rankine cycle (ORC) unit was carried out at a biomass-based forest products manufacturing plant. The ORC unit is used for the production of electricity and heat, by using thermal oil as a heat source in the plant. The actual data were obtained from the ORC unit during the energy production process. Studies were realized for the energy and exergy analysis of the main components of the ORC unit, which are the evaporator, condenser, turbine, and regenerator, at two different working conditions. The effect of condenser pressure on the energy and exergy efficiencies of the system was studied in the context of this study. Under the working conditions of Case-1, the energy and exergy efficiencies were calculated as 12.59% and 33.26%, respectively. As for Case-2, the energy and exergy efficiencies were calculated as 13.22% and 35.5%. The gradation of the exergy destructions of the components from greater to lower can be listed as evaporator,condenser, turbine, regenerator, and pump.
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    Energy Saving and Emission Reduction Opportunities in Mixed-Fueled Industrial Boilers
    (Wiley-Blackwell, 2014) Kaya, Durmus; Eyidogan, Muharrem; Kilic, Fatma Canka; Cay, Yusuf; Cagman, Selman; Coban, Volkan
    In this article, an energy efficiency study has been performed in an industrial establishment. The boiler of this industrial establishment is a mixed-fueled (solid+gas) type and operated with different fuels as coal, coke gas, and blast furnace gas, the pressure of 7000 kPa (70 bars) and temperature of 778.15 K (505 degrees C) and with a nominal capacity of 27.77 kg/s (100.000 kg/h) steam. In this context, the working temperature, pressure, velocity, and combustion gas measurements have been carried out at the boiler operation conditions. Using with all these measurements, the energy and mass balance equations have been set and the boiler efficiency has been calculated as the value of 85.91%. The main efficiency losses have been determined as: operating the boiler at the high air excessiveness coefficient, the air leakage in the rotary type air heaters and the heat losses of the surface. Total energy savings potential is 2,029,692 kcal/h. When anticipated enhancements can be carried out, the boiler efficiency will be 88.94%. In this case, 4861.7 tons of carbon dioxide emissions per year will be reduced. (c) 2014 American Institute of Chemical Engineers Environ Prog, 33: 1350-1356, 2014
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    An experimental examination of energy production from domestic-based waste water treatment sludge
    (Emerald Group Publishing Ltd, 2015) Cagman, Selman; Coban, Volkan; Eyidogan, Muharrem; Kilic, Fatma Canka; Kaya, Durmus
    In Turkey, treatment sludge that obtained from domestic wastewater and water treatment plants causes storage and disposal problems. In the current situation, there are 69 domestic wastewater treatment plants in Turkey and this corresponds to approximately 13% of the population. Total 500 thousand tons of treatment sludge is released from these treatment plants, annually. In the case of all municipalities establish a wastewater treatment plant in Turkey, approximately, 4 million tons of treatment sludge is projected to release in a year. Additionally, 3.6 million tons of treatment sludge will be obtained from the manufacturing industry. In other words, approximately 7.6. 106 tons of treatment sludge potential exists in Turkey and in the same amount of the storage area (7.6 <-> 10(6)m(3)) is needed for the storage of this treatment sludge, perennially. In this study, energy production from wastewater treatment sludge through the anaerobic method has been investigated and compared to the aerobic treatment method. Also, advantages and disadvantages of both methods have been introduced. In order to determine biogas production capacity from treatment sludge, some amount of sample sludge has been taken from the final sedimentation tank before belt press in a wastewater treatment plant and it has been experimentally analyzed.
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    Investigation of Organic Rankine Cycle (ORC) technologies in Turkey from the technical and economic point of view
    (Pergamon-Elsevier Science Ltd, 2016) Eyidogan, Muharrem; Kilic, Fatma Canka; Kaya, Durmus; Coban, Volkan; Cagman, Selman
    In this study, technical and economic analysis of Organic Rankine Cycle (ORC) systems in Turkey and their application areas have been examined in detail. Also, the government incentives for renewable energy productions and industrial waste heat recovery opportunities are investigated and presented. ORC technologies have been dealt with individually in geothermal, solar, biomass and industrial waste heat based power generation plants. In this concept, some power plants have been selected for each application and the technical specifications of these examinations have been presented. An application in a biomass based plant, which has 1 MW of installed capacity, has been given as an example. According to the feasibility analysis, the investment payback period of this ORC application has been calculated as 2.7 years and the results have been presented and commented. (C) 2016 Elsevier Ltd. All rights reserved.
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    SAFETY PRECAUTIONS AND REGULATION ON INDUSTRIAL BIOGAS PLANT: TURKISH MARKET
    (Health & Environment Assoc, 2016) Cagman, Selman
    Biogas, as one of the renewable energy sources, has become increasingly an important alternative energy source. Plants, which treat waste to produce energy, have moved to industrialized size with intensive studies in recent years. Efficiency and safe operation of these plants are very important for plants sustainability. For this purpose, safety measures must be standardized and applied to whole process from manufacturing to energy production within a biogas plant. In this study, all potential risks and necessary precautions taken against these identified risks are listed in a continuously running biogas plant. Moreover, it is also emphasized the necessity of drafting a regulation and the content of this regulation on this issue within Turkey.
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    Selection of compressors for petrochemical industry in terms of reliability, energy consumption and maintenance costs examining different scenarios
    (Multi-Science Publ Co Ltd, 2015) Sapmaz, Suleyman; Kilic, Fatma Canka; Eyidogan, Muharrem; Taylan, Osman; Coban, Volkan; Cagman, Selman; Kilicaslan, Ibrahim
    In this study, based on some important criteria, qualitative and quantitative evaluations were presented for the selection of compressors used in compressed air systems, in a petrochemical industry. Four different scenarios were investigated according to the main criteria considered for the selection of the compressors such as reliability, energy efficiency, investment, and maintenance costs. The types of compressor and their capacities were analyzed and compared. In Scenario I, the currently active electrically driven compressors were considered as backup compressors, instead of them, a new unit turbo compressor and two units of VSD screw compressors were purchased as active compressors. In this scenario, the initial investment cost is low and standby steam consumption is reduced due to the fact that the backup compressors are electrically driven. In Scenario II all active and backup compressors are replaced by a new one, which is proposed to be electrically driven. In this scenario, the initial investment cost is high, but energy consumption is very low. In Scenario III, all active compressors are planned to be replaced by new backup steam-driven compressors. In this scenario, although the initial investment costs and energy consumption are high, the reliability of this scenario is higher than the reliability of Scenarios I and II. In Scenario IV, all compressors are projected to be replaced by new and equivalent compressors. In this scenario, the initial investment cost and energy consumption are high, but the reliability of this scenario is the highest comparing all other scenarios. The aim of this study is to contribute the studies on the selection of compressors by considering some important parameters as their types and capacities, in particular, for industrial enterprises that have risk of explosion like in the petrochemical industry.