286 Journal of mathematics and computer Science 6 (2013) 286 - 291 Optimization of Solar Cooling Systems with Simulation Modeling Hamid Reza Feili 1,* , Fatemeh Moghadasi 2 , Parisa Naderipour 3 , 1 Faculty of Engineering, Department of Industrial Engineering, Islamic Azad University of Karaj, Iran, Hrfeili@gmail.com 2 Faculty of Engineering, Alzahra University, Tehran, Iran, Moghadasi.f@gmail.com 3 Faculty of Engineering, Alzahra University, Tehran, Iran, parisanaderipour@gmail.com Article history: Received January 2013 Accepted February 2013 Available online April 2013 Abstract Rising energy costs and environmental problems, also the limited resources of fossil fuels, have forced humans to use renewable energy. One of the systems that are commonly used is the cooling system, by means of solar energy. Since these models have a wide variety of effective variables, such as the temperature, latitude, the length of the day, also due to the nonlinear relationship between the variables, conventional modeling methods are inefficient. Therefore regarding to the extensive capabilities of simulation models in modeling a wide range of variables with complex and nonlinear relationship, in this study with the approach of simulating solar systems, an effective survey in the field of economic and efficiency of such systems, is presented. Keywords: Solar Energy, Simulation-Optimization, Solar Cooling Systems, Feasibility Study, Arena Software. 1. Introduction Energy price fluctuations, desire to reduce fuel consumption and energy costs, also storing fossil fuels for applications more than just burning, furthermore the necessity of reducing emissions and fuel consumption in the last decade, are prominent reasons for altering attitudes toward the energy utilization .In recent years with the introduction of targeted subsidies in Iran, lowering the costs has become notable .Whereas accessing to clean and renewable energy is important, because of both economic and environmental aspects. Therefore renewable energies can be considered as an alternative for energy supply. Among renewable energy resources, the solar energy is one, which seems to be a good choice for energy supply. In general, on residential and commercial applications, the demand for refrigeration and air conditioning is covered by conventional energy, which causes a considerable overload in the electric grid distribution [1].In Iran, about 40% of total annual energy consumption is related to the building sector, and it has an important share in energy demand [2].One solution to avoid high consumption of heat and cold supply systems, is replacing conventional systems with a more efficient one. However, the cost of implementing a more efficient system is higher but definitely overpaid will be returned during the first few years, through energy savings. The amount of solar energy received by the Earth per 15 minutes is equal to the amount of energy used in all countries. Iran as a Middle Eastern country has recently begun to use renewable energies. Solar * Corresponding author: Assistant Professor, Faculty Member, Department of Industrial Engineering