Comparison of exergy of emissions from two energy conversion technologies, considering the potential for environmental impact

Crane, P.; Scott, David; Rosen, Marc A.

doi:10.1016/0360-3199(92)90171-r

Cited by 41 publications

(16 citation statements)

References 5 publications

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“…Since the kinetic exergy and potential exergy generally account for less than 0.001% of the total exergy of a material, they can therefore be neglected (Zhang et al, 2015b). The physical exergy of a material attributed by pressure and temperature differences is usually also neglected because the material in environmental condition is in equilibrium with the pressure and temperature (Rosen and Dincer, 1999;Crane et al, 1992).…”

Section: Exergy Of Fuelmentioning

confidence: 99%

“…The physical exergy of an emission attributed by pressure and temperature differences is usually not significant and its potential environmental impact is limited as the pressure difference between the emission and the environment normally dissipates shortly after the emission enters the environment, and the temperature difference is normally localized near the emission source (Rosen and Dincer, 1999;Ao et al, 2008, Crane et al, 1992. The chemical exergy of emissions, therefore, appears to be a more representative index than their total exergy (Rosen and Dincer, 1999;Crane et al, 1992;Kirova-Yordanova, 2010).…”

Section: Environmental Impact Of Emissionsmentioning

confidence: 99%

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Understanding the Sustainability of Fuel from the Viewpoint of Exergy

Zhang

Zhao

et al. 2018

European Journal of Sustainable Development Research

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At the same time of providing a huge amount of energy to the world population (social sustainability) and global economy (economic sustainability), the fuel itself also releases a great amount of emissions to the environment the world people live in in the forms of gaseous pollutants (SOx, NOx, CO, CO2, CH4, etc.) and ash compositions (Al2O3, CaO, Fe2O3, K2O, MgO, MnO, Na2O, P2O5, SO3, SiO2, TiO2, etc.), seriously impacting the environment (environmental sustainability) for the world population and global economy. Sustainability generally encompasses economic sustainability, environmental sustainability, and social sustainability, and all of these are significantly related to the energy/resource sustainability. This study addresses the sustainability of fuel from the viewpoint of exergy. It is demonstrated that the energy of a fuel is best evaluated by its chemical exergy, and the environmental impact of a fuel can be assessed through the chemical exergy of its emissions (the specific impacts such as toxicity or greenhouse effect are not detailed). Then, the sustainability of fuel can be understood from the viewpoint of exergy through three ways: (a) high chemical exergy of the fuel, (b) high exergy efficiency of the fuel conversion process, and (c) low chemical exergy of the emissions.

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Section: Exergy Of Fuelmentioning

confidence: 99%

Section: Environmental Impact Of Emissionsmentioning

confidence: 99%

Understanding the Sustainability of Fuel from the Viewpoint of Exergy

Zhang

Zhao

et al. 2018

European Journal of Sustainable Development Research

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“…In spite of many studies concerning the close relationship between energy and the environment, there have been limited works on the link between exergy and environment concepts. Some of these studies concerning exergy have been undertaken by Szargut (1980), Wepfer and Gaggioli (1980), Rosen (1986), Rosen and Scott (1987), Rosen et al (1988), Egrican and Dincer (1992) and Crane et al (1992).…”

Section: Introductionmentioning

confidence: 98%

On Exergy and Environmental Impact

Rosen

Dinçer

1997

Int. J. Energy Res.

240

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SUMMARYEnvironmental problems span a continuously growing range of pollutants, hazards and eco-system degradation factors that affect areas ranging from local through regional to global. Some of these problems may arise from observable, chronic effects on, for instance, human health, while others may stem from the perceived risk of a possible accidental release of hazardous materials. A significant number of these environmental issues are caused by or relate to the production, transformation and end use of energy. In this regard, energy and environment studies which lead to increased energy efficiency can reduce environmental impact by reducing energy losses. Within the scope of exergy methods, such activities lead to increased exergy efficiency, which is of great importance for practical applications. In this study, the main relationships between energy and environmental impact are identified. Historical and modern examples are used to illustrate some of the concepts. The relationships introduced are: order-destruction/chaos-creation, resource degradation and waste exergy emissions. Some examples are given demonstrating the use of exergy analysis in addressing and solving environmental problems.

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“…The connection between the exergy content of waste and its environmental impact has been proposed by several authors [7,8,10,17,23,[30][31][32][33][34]. For example, Ao et al [22] argue that exergy can be viewed as "a measure of the departure of a substance from equilibrium with a specified reference environment, which is often modeled as the actual environment", and that "the exergy of an emission to the environment, therefore, is a measure of the potential of the emission to change or impact the environment".…”

Section: Exergy and Waste Impactmentioning

confidence: 99%

“…For example, when discussing green energy technology, Rosen and Dincer [10] argue that exergy analysis provides information that is more useful and more meaningful than energy analysis. The notable benefits of the exergy concept has led to its application in several different disciplines, including: ecology and complex systems [5,[12][13][14][15][16]; resource accounting and lifecycle assessments [7,9,11,[17][18][19][20][21]; process optimization [10,[22][23][24][25]; and even social theory [26].…”

Section: Introductionmentioning

confidence: 99%

The Characteristics of the Exergy Reference Environment and Its Implications for Sustainability-Based Decision-Making

2012

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In the energy realm there is a pressing need to make decisions in a complex world characterized by biophysical limits. Exergy has been promoted as a preferred means of characterizing the impacts of resource consumption and waste production for the purpose of improving decision-making. This paper provides a unique and critical analysis of universal and comprehensive formulations of the chemical exergy reference environment, for the purpose of better understanding how exergy can inform decision-making. Four related insights emerged from the analysis, notably: (1) standard and universal chemical exergy reference environments necessarily encounter internal inconsistencies and even contradictions in their very formulations; (2) these inconsistencies are a result of incompatibility between the exergy reference environment and natural environment, and the desire to model the exergy reference environment after the natural environment so as to maintain analytical relevance; (3) the topics for which exergy is most appropriate as an analytical tool are not well served by comprehensive reference environments, and (4) the inconsistencies point to a need for deeper reflection of whether it is appropriate to adopt a thermodynamic frame of analysis for situations whose relevant characteristics are non-thermodynamic (e.g., to characterize scarcity). The use of comprehensive reference environments may lead to incorrect recommendations and ultimately reduce its appeal for informing decision-making. Exergy may better inform decision-making by returning to process dependent reference states that model specific processes and situations for the purpose of engineering optimization. OPEN ACCESSEnergies 2012, 5 2198

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Comparison of exergy of emissions from two energy conversion technologies, considering the potential for environmental impact

Cited by 41 publications

References 5 publications

Understanding the Sustainability of Fuel from the Viewpoint of Exergy

Understanding the Sustainability of Fuel from the Viewpoint of Exergy

On Exergy and Environmental Impact

The Characteristics of the Exergy Reference Environment and Its Implications for Sustainability-Based Decision-Making

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