Browsing by Author "Yücekaya, Ahmet"
Now showing items 1-17 of 17
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Agent-based Optimization to Estimate Nash Equilibrium in Power Markets
Yücekaya, Ahmet; Valenzuela, Jorge (Taylor & Francis Inc, 2013)In most deregulated power markets firms bid daily into a day-ahead power market. The auction mechanism supply and demand determine the equilibrium at each hour. In this environment firms aim to maximize their revenues by ... -
An analysis of price spikes and deviations in the deregulated Turkish power market
Gayretli, Gizem; Yücekaya, Ahmet; Bilge, Ayşe Hümeyra (Elsevier, 2019)The successful operation of a real time market is related to the planning in the day ahead market. We analyze the day ahead and real time market data for the Turkish power market for the period 2012-2015 to classify price ... -
Bidding of price taker power generators in the deregulated Turkish power market
Yücekaya, Ahmet (Pergamon-Elsevier Science Ltd, 2013)In deregulated power markets power firms bid into the day-ahead power market either with buy offers or sell offers. The auction mechanism and competition determine the equilibrium price and quantity for each hour. If the ... -
Energy Storage with Pumped Hydrostorage Systems Under Uncertainty
Yücekaya, Ahmet (Springer International Publishing Ag, 2015)Energy storage is becoming an important problem as the difference between supply and demand becomes sharper and the availability of energy resources is not possible all the time. A pumped hydrostorage system (PHSS) which ... -
Forecasting electricity demand for Turkey: Modeling periodic variations and demand segregation
Yükseltan, Ergün; Yücekaya, Ahmet; Bilge, Ayşe Hümeyra (Elsevier, 2017)In deregulated electricity markets the independent system operator (ISO) oversees the power system and manages the supply and demand balancing process. In a typical day the ISO announces the electricity demand forecast for ... -
Forecasting Models For Daily Natural Gas Consumption Considering Periodic Variations And Demand Segregation
Yükseltan, Ergün; Yücekaya, Ahmet; Bilge, Ayşe Hümeyra; Ağca Aktunç, Esra (Elsevier Ltd, 2020)Due to expensive infrastructure and the difficulties in storage, supply conditions of natural gas are different from those of other traditional energy sources like petroleum or coal. To overcome these challenges, supplier ... -
A fuzzy ANP-based GRA approach to evaluate ERP packages
Ayağ, Zeki; Yücekaya, Ahmet (IGI Global, 2019)One of the major problems that most companies face with during the implementation of an ERP system is to determine the best satisfying ERP software based on their needs and expectations. Because an improperly selected ERP ... -
Hourly electricity demand forecasting using Fourier analysis with feedback
Yükseltan, Ergün; Yücekaya, Ahmet; Bilge, Ayşe Humeyra (Elsevıer, 2020)Whether it be long-term, like year-ahead, or short-term, such as hour-ahead or day-ahead, forecasting of electricity demand is crucial for the success of deregulated electricity markets. The stochastic nature of the demand ... -
Landfill Gas to the Energy Potential of Turkey: A Scenario-based Multi-period Simulation
Yücekaya, Ahmet (Taylor & Francis Inc, 2013)Turkey is a developing country with increasing power demands and limited energy sources. Municipal solid waste processing landfilling and utilization of the gas to generate electric power and lower emissions has been used ... -
Managing Fuel Coal Supply Chains With Multiple Objectives and Multimode Transportation
Yücekaya, Ahmet (AMER SOC ENGINEERING MANAGEMENT, 2013)Power companies require sophisticated tools to manage fuel-coal supply chains which include multiple suppliers coal contracts and multimode transportation routes. In this article a multi-objective model which is integrated ... -
Managing natural gas demand for free consumers under uncertainty and limited storage capacity
Aktunç, Esra Ağca; Yükseltan, Ergün; Yücekaya, Ahmet; Bilge, Ayşe Hümeyra (Elsevier, 2020)Demand for energy sources depends on several factors such as population growth, urbanization, industrialization, and climate. Among fundamental energy sources, natural gas is characterized by storage limitations and ... -
Multi-objective Fuel Supply for Coal-fired Power Plants Under Emission Transportation and Operational Constraints
Yücekaya, Ahmet (Taylor & Francis Inc, 2013)Coal-fired power plants need to decrease their generation cost in deregulated power markets so as to be selected dispatched and compete with other cheaper resources. On the other hand coal prices have risen significantly ... -
A network model for the location-routing decisions of a logistics company
Sama, Funda; Yücekaya, Ahmet; Ayağ, Zeki (Institute of Industrial Engineers, 2012)In this paper, part of the logistics network of one of the leading logistics companies in Turkey is analyzed. Data related to the candidate warehouse locations, supplies and demands of customers are collected. A network ... -
Nutrient Dynamics in Flooded Wetlands. I: Model Development
Hantush, Mohamed M.; Kalın, Latif; Işık, Sabahattin; Yücekaya, Ahmet (ASCE-AMER SOC CIVIL ENGINEERS, 2013)Wetlands are rich ecosystems recognized for ameliorating floods improving water quality and providing other ecosystem benefits. This part of a two-paper series presents a relatively detailed process-based model for nitrogen ... -
Nutrient Dynamics in Flooded Wetlands. II: Model Application
Kalın, Latif; Hantush, Mohamed M.; Işık, Sabahattin; Yücekaya, Ahmet; Jordan, T. (ASCE-AMER SOC CIVIL ENGINEERS, 2013)In this paper the authors applied and evaluated the wetland nutrient model that was described in Paper I. Hydrologic and water quality data from a small restored wetland located on Kent Island Maryland which is part of the ... -
The operational economics of compressed air energy storage systems under uncertainty
Yücekaya, Ahmet (Pergamon-Elsevier Science Ltd, 2013)A Compressed Air Energy Storage System is a means of storing energy which can then be used when the demand for energy increases. In this system air is compressed in a cavern when power prices are low and this air is used ... -
Scheduling a log transport system using simulated annealing
Haridass, Karunakaran; Valenzuela, Jorge; Yücekaya, Ahmet; McDonald, Tim (Elsevier Science, 2014)The log truck scheduling problem under capacity constraints and time window constraints is an NP-hard problem that involves the design of best possible routes for a set of trucks serving multiple loggers and mills. The ...