Annual Report 2011-2012

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Annual Research Report 2011-2012 Project Title: Periodic sampling and chemical analysis of fuels used in power plants Department: Chemistry & Process Project Manager: F.Borhan azad Employer: Iran Energy Efficiency Organization (SABA) Project Code: CPCSB01 Project Staffs: A.Zahiri, S. E. Samadi Project Summary: Fuel testing and controlling its quality is important in operation of power plants. At present in most of the country's power plants, natural gas is used as main fuel and heavy fuel or gas oil as alternative one. The efficiency of power plants is affected by various factors including fuel heat value and composition. Moreover, the chemical composition of the fuels around the country is not identical and depends on gas providing source. Therefore in order to study the fuel quality effect on power plant performance, it is necessary to test fuels in various periods of the year. In this project 21 power plant unit was selected in such a manner that the effects of various climatic condition and units lifetimes could be studied. Then fuel sampling and testing were performed during five periods of a year. Also the operational data of each unit was gathered. Then the unit efficiencies during fuel sampling periods were calculated and their variations were plotted. In the next step, the testing results and operational data were analyzed and the effect of various factors such as fuel chemical composition, operational parameters, power plant lifetime and locations,. on plants efficiencies were determined. At final step, the efficiencies of power plants were compared and recommendations for their improvements were offered. Project results: • Study of the power plants in the different seasons of the year and comparing them from the efficiency and fuel specification point of views • Determining the priority of the power plants for installation of online fuel sampling and chemical analysis system. • Preparing proposal for using weight and colorific counters instead of current volume counters in power plants in short-term and long-term planning respectively • Preparing proposal for periodic sampling and chemical analysis of fuel in power plants • Offering recommendations regarding improvement of gas fuel heaters, using duct burner in gas turbines, modification of gas pipe line, proper using of gas units in power generation, …. 139
Annual Research Report 2011-2012 • Preparing a program to switch from gas fuel to alternative one in case of gas fuel shortage considering the change of power plant efficiency. Project Documentation: • Chemistry & Process Department, Chemistry & materials research center, NRI, Report of stage 1-5. 140
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