Studying the Trend of Sustainability Indices of Energy in the First Half of Iran’s 20-year Vision Document

The main purpose of this study is to evaluate the trend of sustainability indices of energy during two first-5-year periods in the Iran’s outlook 1404 (years of 2005-2009 and 2010-2014). In order to evaluate the sustainability of energy system, combined sustainable energy index (SEDI) is applied. Dimensions included in this study are: technical, economic, social, environmental, institutional dimensions. After calculating the sustainability of each of dimensions, each dimension normalized based on the calculation method of HDI index, afterwards SEDI index computed; which is the average of the 5 dimensions. The results show that technical, economic and social dimensions in the first 5-year period have positive sustainability rate, but in the second period unlike technical and economic dimensions that their sustainability rates have little increased, social dimension has experienced reduction in the rate. Environmental and institutional dimensions and also SEDI index have negative sustainability rate in the first period. SEDI sustainability rate in the second 5-year period has become positive (but insignificant) and has gone to a sustainability path. Sustainability rate of environmental dimension in the second period with a slight improvement has still remained negative and, contrary to this dimension, institutional dimension has become more unstable.