Abstract

Exergy is the very useful tool to evaluate energy systems besides energy analysis based on the first law of the thermodynamics. In contrast to energy, exergy is not conserved and always decreases. There are many types of exergy analysis involving exergoeconomic, exergoenvironmental, advanced exergy-based analyses, extended exergy analysis etc. In this study, an application of the extended exergy analysis is performed. In extended exergy analysis, not only energy related system is considered but also all materials and energy flows’ exergy, non-energetic and immaterial fluxes (capital, labor and environmental impact) are turned into exergy equivalent values and utilized in the analysis, which are calculating for local econometric and social data. These methods can be applied to societies or energy based or non-energy-based system. In this study, dynamic exergy analysis and extended exergy application of electricity generation from photon enhanced thermionic emitter is conducted. According to results, some important values can be listed as; extended exergy destruction, conventional based exergy destruction, extended exergy efficiency, conventional exergy efficiency, extended sustainability ratio, conventional sustainability ratio, extended exergy-based depletion ratio and conventional exergy-based depletion ratio are 542106006 MJ, 542084601 MJ, 0.01094, 0.01094, 1.011, 1.011, 0.978 and 0.989 respectively.

Highlights

  • IntroductionEnergy is a concept transferred from an object to another in form of work or to heat

  • Together with the great developments and changes in the industrial field, the increase in the world population at the same time reveals the need for energy [2]. 87 percent of the energy produced in the world is provided by fossil fuels, 6 percent from renewable sources, and 7 percent from nuclear energy sources

  • Performance and sustainability of the photon enhanced thermionic emitter is evaluated via extended exergy analysis

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Summary

Introduction

Energy is a concept transferred from an object to another in form of work or to heat. From an economic and social perspective, energy is the most important factor that ensures progress in world living standards and country development. Together with the great developments and changes in the industrial field, the increase in the world population at the same time reveals the need for energy [2]. Entropy and Exergy in Renewable Energy electrical energy production is realized by fossil resources (38.7% coal, 18.3% natural gas, 7.5% oil)” [3]. Turkey has no significant energy resources in petroleum and natural gas reserves. When the distribution of Turkey installed power in the energy sector on the basis of resources is examined, natural gas 26.5%, hydraulic energy 32%, coal 21.3%, wind energy 7.7%, solar energy 5.3%, geothermal energy 1.4%, 5.8% share belongs to other resources [4]

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