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Exergy of undiluted thermal radiation
Solar Energy, 2003Abstract The present work discusses the existing formulae for calculation of the thermal radiation exergy. Some clarifications of terms used are given with interpretative comments. Discussed are the author’s derivation procedures for three categories of radiation; enclosed system, black flux, and any arbitrary radiation flux.
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Exergy of partially coherent thermal radiation
Energy, 2012Abstract Exergy of electromagnetic radiation has been studied by a number of researchers for well over four decades in order to estimate the maximum conversion efficiencies of thermal radiation. As these researchers primarily dealt with solar and blackbody radiation, which have a low degree of coherence, they did not consider the partial coherence ...
S. Wijewardane, Yogi Goswami
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Exergy concepts for thermal plant
International Journal of Heat and Fluid Flow, 1980Abstract In this work the concepts applicable to a method of thermodynamic analysis known as exergy analysis are defined and discussed. Expressions are obtained for exergy components of a steady stream of matter and the relationship between the exergy of a steady stream of matter and that of a closed system is derived.
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Finite time generalization of thermal exergy
Energy Conversion and Management, 1998Abstract An extended exergy allowing some inevitable dissipative properties (e.g. those occurring in boundary layers) can be formulated for finite rate transitions, which lead a system not in equilibrium with the environment (or “dead state”) to equilibrium with it in a finite time. This exergy is a function of the end states and the process duration
Stanislaw Sieniutycz +1 more
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Exergy analysis of solar thermal collectors and processes
Progress in Energy and Combustion Science, 2016Abstract This paper presents a review of exergy analysis of solar thermal collectors and processes. It includes not only various types of solar collectors, but also various applications of solar thermal systems. Initially the fundamentals of second law analysis are briefly presented as well as the exergy of solar radiation, which is the input to any ...
Konstantinos Braimakis +2 more
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Exergy in the Thermal Systems Analysis
1999Exergy analysis has been developed as a result of application of the second law of thermodynamics to the investigation of the thermodynamic imperfection of industrial thermal processes. Precursors of exergy analysis were Gouy [1] and Stodola [7].
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Storage of Thermal Energy and Exergy
2017This chapter refers to thermal energy storage (TES) systems based on fully mixed and stratified liquid storage tanks. The performance indicator adopted here is the minimum exergy destruction. All relevant irreversibility sources are considered. Every operation regime has an optimum charging time, which increases by decreasing the hot gas inlet ...
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Exergy conservation in parallel thermal insulation systems
International Journal of Heat and Mass Transfer, 1983Abstract This paper is a Second-Law study of thermal insulation systems consisting of two 1-dim. insulations in parallel. It is shown that the parallel-insulation model applies to power and refrigeration systems exposed to large absolute temperature ratios.
W. Schultz, A. Bejan
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Fundamentals of Exergy Analysis and Exergy-Aided Thermal Systems Design
1999A close reading of the early literature of the second law of thermodynamics originating from the time of Carnot shows that second law reasoning in today’s engineering sense - -optimal conversion of inputs to end use - - was present from the beginning. Interest in this theme occasionally flickered in the interim, but it was kept alive and now forms the ...
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Endogenous and Exogenous Exergy Destruction in Thermal Systems
Advanced Energy Systems, 2006One of the roles of exergy analysis is to provide thermal system designers and operators with information useful for the system optimization. An exergy analysis identifies the sources of thermodynamic inefficiencies by evaluating the exergy destruction within each system component.
George Tsatsaronis +2 more
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