AVOIDABLE AND UNAVOIDABLE EXERGY DESTRUCTION AND EXERGOECONOMIC EVALUATION OF THE THERMAL PROCESSES IN A REAL INDUSTRIAL PLANT

Exergy analysis is a universal method for evaluating the rational use of energy. It can be applied to any kind of energy conversion system or chemical process. An exergy analysis identifies the location, the magnitude and the causes of thermodynamic inefficiencies and enhances understanding of the energy conversion processes in complex systems. Conventional exergy analyses pinpoint components and processes with high irreversibility. To overcome the limitations of the conventional analyses and to increase our knowledge about a plant, advanced exergy-based analyses are developed. These analyses provide additional information about component interactions and reveal the real potential for improvement of each component constituting a system, as well as of the overall system. In this paper, a real industrial plant is analyzed using both conventional and advanced exergy analyses, and exergoeconomic evaluation. Some of the exergy destruction in the plant components is unavoidable and constrained by technological, physical and economic limitations. Calculations related to the total avoidable exergy destruction caused by each component of the plant supplement the outcome of the conventional exergy analysis. Based on the all-reaching analysis, by improving the boiler operation (elimination of approximately 1 MW of avoidable exergy destruction in the steam boiler) the greatest improvement in the efficiency of the overall system can be achieved.

[1]  Göran Wall,et al.  Conditions and tools in the design of energy conversion and management systems of a sustainable society , 2002 .

[2]  Tatiana Morosuk,et al.  Advanced exergetic analysis : Approaches for splitting the exergy destruction into endogenous and exogenous parts , 2009 .

[3]  George Tsatsaronis,et al.  ON AVOIDABLE AND UNAVOIDABLE EXERGY DESTRUCTIONS AND INVESTMENT COSTS IN THERMAL SYSTEMS , 2002 .

[4]  Mehmet Kanoglu,et al.  Exergoeconomic analysis and optimization of combined heat and power production: A review , 2009 .

[5]  Jan Szargut,et al.  Exergy Analysis of Thermal, Chemical, and Metallurgical Processes , 1988 .

[6]  Marc A. Rosen,et al.  Exergy and economics: Is exergy profitable? , 2002 .

[7]  M. J. Moran,et al.  Fundamentals of Engineering Thermodynamics , 2014 .

[8]  S. Probert,et al.  Exergy and economics , 1981 .

[9]  Solange O. Kelly,et al.  Energy Systems Improvement based on Endogenous and Exogenous Exergy Destruction , 2008 .

[10]  Y. M. El-Sayed,et al.  Thermoeconomics and the Design of Heat Systems , 1970 .

[11]  R. Rivero,et al.  Simulation, exergy analysis and application of diabatic distillation to a tertiary amyl methyl ether production unit of a crude oil refinery , 2004 .

[12]  Myron Tribus.  Thermodynamic and economic considerations in the preparation of fresh water from the sea , 1960 .

[13]  Tatiana Morosuk,et al.  Advanced Exergy Analysis for Chemically Reacting Systems – Application to a Simple Open Gas-Turbine System , 2009 .

[14]  T. J. Kotas,et al.  The Exergy Method of Thermal Plant Analysis , 2012 .

[15]  T. J. Kotas,et al.  Teaching The Exergy Method To Engineers , 1985 .

[16]  Zengliang Gao,et al.  Avoidable thermodynamic inefficiencies and costs in an externally fired combined cycle power plant , 2006 .

[17]  Enrico Sciubba,et al.  A brief Commented History of Exergy From the Beginnings to 2004 , 2007 .

[18]  Georgios Tsatsaronis,et al.  Exergoeconomic analysis and evaluation of energy-conversion plants—I. A new general methodology , 1985 .

[19]  M. J. Moran,et al.  Thermal design and optimization , 1995 .

[20]  Tatiana Morosuk,et al.  Advanced exergetic analysis of a novel system for generating electricity and vaporizing liquefied natural gas , 2010 .

[21]  Tatiana Morosuk,et al.  Conventional and advanced exergetic analyses applied to a combined cycle power plant , 2012 .