Ranking of CCHP system implementation in Tehran in terms of qualitative and quantitative criteria

Of the most important ways to increase energy efficiency, is reducing distribution costs and avoiding of wasting energy. In this paper combined cooling, heating and power plant at the capacity of 5 MW (target power plant) and 1, 8 and 25 MW (alternative options) are studied. Based on the Principles of clean development mechanism, Assessing before fulfillment and social cost-benefit analysis; techniques such as internal rate of return, payback period, and the present value were used; and the results have been studied in terms of Qualitative test such as utility, Hicks-Caldor efficiency and Pareto optimality. Different Capacity mentioned, Were assessed from an economic perspective by 3 scenarios including the sale of power, the sale of electricity and heat and sale of electricity, heat and environmental revenues; Results confirms the CCHP financial and economic feasibility (except for 1-megawatt power plant in electricity sales scenario). Also in case of unlimited resources, priority of execution of power plants at the first two scenarios, respectively capacities of 25, 8, 5 and 1 MW; By applying environmental revenues, 1-megawatt power plant performance Priors than 5 and 8-megawatt power plants. Based on the results and technical, economic and environmental benefits of cogeneration power plants, expanding the system is recommended as an economic strategy to increase the efficiency of the power industry.