Exergy
The science of thermodynamics is based primarily on the two fundamental laws of nature, known as the first and second laws. FLT is just an expression of the principle of conservation of energy. He argues that the energy of a thermodynamic property, and that the interaction energy can change from one form to another, but the total amount of energy remains the same. In SLT argues that energy has a quantitatively but qualitatively, and the actual processes are in the direction of reduction of electric energy quality. High-temperature heat energy, degrades as it moves to a lower body temperature. Attempts to measure the quality or "potential" energy in the light of the SLT, allowed to define a property called exergy.
Exergy analysis is a method of thermodynamic analysis, based on the SLT, which provides an alternative and lighting tools for the evaluation and comparison of processes and systems efficiently and intelligently. In particular, exergy analysis of the profitability and efficiency that provide a true measure of how almost the actual throughput approaches the ideal, and more clearly defined than the energy analysis of the causes and places of thermodynamic losses and the impact of the built environment on the natural environment.
Thus, exergy analysis can help in improving and optimizing the design.
Implementation of energy conversion systems and processes, in fact, effectiveness is measured, except that it becomes a performance factor for refrigeration systems and heat pumps. There are two thermodynamic efficiency, namely energy and exergy efficiency. While energy efficiency is typically used by many for performance assessment, exergy efficiency is more profitable, as it believes that irreversibilities, and presents the actual performance of the system. Considering both these efficiency, quality and the amount of energy needed to achieve a given objective is considered and the degree of effective use of energy resources is achieved you can understand.
Improving the efficiency of energy systems is an important task for meeting energy policy objectives. Reduction in the use of energy, can help achieve energy security. In addition, the efficient use of energy and introduction of energy saving technologies can greatly assist in solving environmental problems. Energy efficiency benefits the environment, avoiding the use of energy and the corresponding resource consumption and pollution generation. From an economic as well as in terms of environmental protection, energy efficiency has great potential (Dincer and Rosen, 2005).
Engineer designing a system is often seek higher rational technical efficiency at the lowest cost in the conditions of the technical, economic and legal conditions and taking into account ethical, environmental and social impact. Exergy methods can help in such activities and offer unique insights into possible improvements with a focus on environment and sustainable development. Exergy analysis is a useful tool for solving environmental consequences of the use of energy resources and promote the purpose of more efficient use of energy resources, allowing locations, types, and the true magnitude of losses to be determined. In addition, exergy analysis shows how it is possible for the development of more efficient energy systems by reducing inefficiencies. We present an exergy as a key tool for systems/processes analysis, design, and performance improvement...
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