ANNALS of Faculty Engineering Hunedoara – International Journal of Engineering Tome XVI [2018] | Fascicule 1 [February] 93 | F a s c i c u l e 1 1. Hilmi ZENK INVESTIGATION OF ENERGY EFFICIENCY IN TURKEY 1. University of Giresun, Engineering Faculty, Güre Campus, Giresun, TURKEY Abstract: The fact that the reserves of fossil energy resources are limited, the scientific studies on renewable and alternative energy sources are intensified and the share of the total installed capacity in the world is still small while the investments are increasing at a serious rate, the efforts of using energy more efficiently have been increased. When the geographical location is examined, it is observed that Turkey is located on the intersection of energy corridors. What is the level of energy efficiency studies? In this study, with the increasing population and energy consumption amounts, Turkey's analysis of the energy efficiency situation has been analyzed and some evaluations have been made for the future. It has also been shown that it may be possible to contribute to the protection of the country's economy and the environment without restricting civilian needs by using energy more efficiently on a sectoral basis from the example of Turkey. Keywords: renewable and alternative energy sources, energy efficiency, Turkey 1. INTRODUCTION For economic and social development and human life; reliable, cheap and clean energy supply today has become the most important problem. It is known that 1.3 billion people in the world still do not have the right to use energy. This is one of the problems expressed in the future that could lead to wars in world scale. The data show that the rate of increase in energy consumption in Turkey is more than twice that of the EU and OECD countries. The change in electricity consumption is four times higher than the average of other countries [1]. The world's energy consumption has increased by 45% since 1980. It is predicted that by 2030 it will have increased by more than 70%. The emerging Asia-Pacific markets include 75% of the new demand and put new pressure on the resources of the world. However, there is a growing demand and limited resource problem in developed markets such as North America, Europe and Japan. These developed markets will continue to make the necessary adjustments to reduce consumption, use alternative energy sources and increase energy security. 2. GENERAL OVERVIEW OF WORLD ENERGY APPEARANCE The oil crises of the early 1970s and subsequent embargoes on the producer countries led to western countries taking urgent measures for their energy needs. Since these countries have urgently deployed nuclear power plants, they have made serious investments in alternative energy sources and energy efficiency issues. The variation of primary energy consumption on the basis of resources is shown in Figure 1 [2]. Figure 1. Change of world primary energy consumption on the basis of sources (1820 - 2010) Figure 2. Change in primary energy consumption of some countries (2000 - 2013)