Rafineri utilite sisteminin çok zamanlı tam sayılı doğrusal programlama ile optimizasyonu

Energy efficiency is one of the most important factors in refineries which affect the cost and the competitiveness. In order to deal with economical difficulties and compete with other refineries, a refinery must fulfill its energy demand on its own. Moreover securing the continuity of the processes is also another concern. In a refinery processes must be held online whatever the situation is. So it is unreliable to run such huge system only depending on outsources. In this concern we have provided a decision support system for determining the optimum working criteria of equipments in a Tüpraş İzmit Refinery power plant. Refineries use different sources for fulfill their energy demands. Generally power plants are the main providers. However for electricity demand refineries are usually connected to national grids in order to buy or sell electricity depending on the amount of production and the prices of the electricity in "day ahead" and "daily" electricity market. We illustrate the efficiency and accuracy of our model on a real example of İzmit Refinery Power Plant and implemented the proposed model into GAMS (General Algebraic Modeling System) optimization package by using "Cplex" solver. The result of 0.45 % of cost reduction can be obtained without any investment. Finally, we conclude with the sensitivity analysis in order to see the affects of variations in electricity prices in daily electricity market.