جستجوی مقالات مرتبط با کلیدواژه « بهینه سازی انرژی » در نشریات گروه « مدیریت »

In this research, energy data of the country from 1374 to 1397 are presented and econometric analysis and decomposition analysis methods (Laspeyres and Logarithmic mean Divisia index) are used to identify and determine the effect of activity, structure and energy intensity on energy consumption. The results of econometric method analysis show that the fitted function of energy consumption based on the two variables of population and value added with R2 = 99% is valid and the population factor has a greater effect than the value added factor on changes in energy consumption. The results of the Decomposition analysis show that the Divisia method has a higher accuracy than the Laspeyres method and according to this method and during the whole period, the average structural effect is 48%, activity effect is 18% and energy intensity effect is 18% in increasing energy consumption.

The growing demand of power has made the power plants of scientific interest, but most of the power plants are designed by the energetic performance criteria based on first law of thermodynamics only. The real useful energy loss cannot be justified by the first law of thermodynamics, because it does not differentiate between the quality and quantity of energy. The objective of this paper is to perform the energy, exergy analysis for the Besat steam power plant located in Tehran.The results show that energy losses have mainly occurred in the condenser where around 77% of the total power plant energy losses are lost to the environment. Nevertheless, the exergy destruction rate of the boiler is higher than the exergy destruction rates of the other components. It is due to the fact that the combustion reaction and its high temperature are the most significant sources of exergy destruction in the boiler system. The second large exergy destruction occurs in the turbine system. So significant improvements potential exist in the boiler and turbine unit