Results of the energy intensity and overall energetic efficiency show that total energy output increased from 69.87 to 82.08 GJha -1 , with increasing commercial energy input from 17.94 to 27.10 . Energetic efficiency, calculated as the ratio of total output to input for different crops, using weight factor, decreased from 3.97 to 3.03. The energetic efficiency declines with increasing energy input, and the result indicates that input energy increases faster compared to energy output. The mechanization index increased from 64 to 78%. However, the main goal being maximization of the output per unit agricultural land, the estimated change in efficiency with increasing input can play an important role in choosing the appropriate input for optimum output.
For the purpose of identifying the vulnerable aspects of our energy problem and to seek an appropriate solution, the total energy supply, energy demand and energy consumption need to be analyzed in respect of their components. We have used the decomposition model for analyzing the correlation between energy consumption and economic development up to 2007 taking 1990 as the base year. The relative impacts of activity, intensity and structure effect are analyzed for different economic sectors in Bangladesh. Moreover, the country's economy is disaggregated in to two groups' namely low energy intensive group and high-energy intensive group. The trends of energy uses in the above groups are also evaluated to provide a basis for assessment of sustainability.
In this paper Complete Decomposition Model is used to compute the future energy saving pattern from the difference of the 'trend' and 'real' values of energy consumption. The 'trend' is defined as a sum of activity effect and the energy use in the base year. The 'real' is defined as a sum of energy consumption in the base year and the change in energy consumption due to the activity effect, structural effect and intensity effect. This analysis is carried out in respect of Bangladesh for the period 2008-2030. The economic sectors that are taken in to account are agriculture, industry and service. The futuristic view shows that Bangladesh can save about 47.47 MTOE in agriculture sector and 34.96 MTOE from service sector. On the other hand, industry sector, which is accounted for 58% of the total energy consumption, failed to save energy, rather the country consumed 227 MTOE more energy than usual. The energy rebound effect that relies upon the activity effect and structural effect has also been estimated to examine the energy uses pattern of these sectors. The aggregate energy rebound effect was found to be 1480 MTOE, of which activity effect and structural effect contribute 91.21% and 8.78% respectively. DOI: http://dx.doi.org/10.3329/bjsir.v47i3.13066 Bangladesh J. Sci. Ind. Res. 47(3), 313-320 2012
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