Yazar "Tunc, Murat" seçeneğine göre listele

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    Energy management and optimization: case study of a textile plant in Istanbul, Turkey
    (Emerald Group Publishing Ltd, 2016) Tunc, Murat; Kaplan, Kayhan; Sisbot, Sedat; Camdali, Unal
    Purpose - This paper aims to present the results of energy management and optimization studies in one Turkish textile factory. In a case study of a print and dye factory in Istanbul, the authors identified energy-sensitive processes and proposed energy management applications. Design/methodology/approach - Appropriate energy management methods have been implemented in the factory, and the results were examined in terms of energy efficiency and cost reduction. Findings - By applying the methods for fuel distribution optimization, the authors demonstrated that energy costs could be decreased by approximately. Originality/value - Energy management is a vital issue for industries particularly in developing countries such as Turkey. Turkey is an energy poor country and imports more than half of its energy to satisfy its increasing domestic demands. An important share of these demands stems from the presence of a strong textile industry that operates throughout the country.
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    Influence of seawater temperature on thermal efficiency of an integrated electric power generation and water desalination plant
    (Desalination Publ, 2017) Tunc, Murat; Sisbot, Sedat
    This paper is an attempt to demonstrate the effect of sea water temperature on the overall efficiency of electric power generation combined with a water desalination plant. The plant under consideration is composed of two thermally and mechanically coupled loops: a steam power plant loop to produce electricity and a reverse osmosis loop including pressure exchange system to provide drinkable water from seawater. The reverse osmosis loop including pressure exchange system is known to be the state of the art desalination technology for obtaining fresh water. The waste pressure from reverse osmosis is transferred to the low pressure concentrate in a pressure exchange system to save a considerable amount of energy. It is shown in the body of paper that the sea water inlet temperature has a direct impact on the overall efficiency of the system. This is fundamentally accomplished by the rejected heat of Rankine cycle in a condenser. As a result, this paper shows that the overall efficiency of the combined plant is found to be highest when sea water temperature at the condenser exit is elevated to around 30 degrees C.
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    MILP based short-term centralized and decentralized scheduling of a hydro-chain on Kelkit River
    (Elsevier Sci Ltd, 2015) Yildiran, Ugur; Kayahan, Ismail; Tunc, Murat; Sisbot, Sedat
    In this work a scheduling problem for three reservoirs located at the upper part of Kelkit River in the Black Sea Region of Turkey is studied. Currently these reservoirs are operated independently by two private companies and one state owned company without any coordination. Operators complain about spillages causing waste of water resources. In order to remedy this problem, we propose a coordinated short-term scheduling method regarding the water as a common pool resource shared by the operators. The proposed algorithm is based on estimation of day-ahead market prices using a time-series method and formulation of the scheduling problem as a mixed integer-linear program (MILP). In order to evaluate the benefits of coordinated operation we compare its performance with a similar approach without coordination. The results show that the profit of the overall chain can be improved and spillages can be avoided significantly as a result of such a common resource management strategy. (C) 2015 Elsevier Ltd. All rights reserved.
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    Optimal Domestic Solar Space and Water Heating System in Cesme
    (Int Journal Renewable Energy Research, 2017) Tunc, Murat; Camdali, Unal
    Solar hot water and space heating systems have been an important energy conservation technique in buildings, along with improving insulation efficiency of building envelopes and HVAC systems. According to statistical data from EU, installations of solar hot water heating systems have been increased gradually. The purpose of this study is to illustrate quantitatively the feasibility of optimal space and water heating system using solar energy. The house is assumed to be located in Cesme, Turkey, where 1304 kWh/m(2)-year of solar radiation for the period of 2734 h/year is measured. Considering the space heating and hot water demand in this geographic location, solar collector and storage capacity are optimized using f-Chart method. The results showed that a 92% of the total energy demand can be covered by solar energy.