Cumulative exergy consumption and cumulative degree of perfection of chemical processes

Szargut, Jan; Morris, David R.

doi:10.1002/er.4440110207

Cited by 214 publications

(235 citation statements)

References 5 publications

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“…This type of budgeting is often termed Exergy Analysis [6,7], Exergy Process Analysis, see Fig. (3), or Cumulative Exergy Consumption [9], and focuses on a particular process or sequence of processes for making a specific final commodity or service. It evaluates the total exergy use by summing the contributions from all the individual inputs, in a more or less detailed description of the production chain.…”

Section: Life Cycle Exergy Analysismentioning

confidence: 99%

Life Cycle Exergy Analysis of Renewable Energy Systems

Wall¹

2011

TOREJ

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Exergy concepts and exergy based methods offer an insight to the understanding of sustainable energy engineering. The utilization of energy and other resources by applying physical concept as exergy and exergy based methods and the value of these tools in the design are presented, in particular Life Cycle Exergy Analysis (LCEA). LCEA is applied to a typical wind power plant. This brings a new approach and insight to the engineering conditions for a sustainable development that is further elaborated. The importance of introducing this new knowledge into present engineering education and practices is argued for.

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Section: Life Cycle Exergy Analysismentioning

confidence: 99%

Life Cycle Exergy Analysis of Renewable Energy Systems

Wall¹

2011

TOREJ

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“…There are several proposals that consider the exergy analysis for measuring sustainability performance. Extended Exergy Account (EEA) (Sciubba, 2003), Cumulative Exergy Consumption (CEC) (Szargut & Morris, 1985), Life Cycle Exergy Analysis (LCEA) (Gong & Wall, 2001), Exergetic Life Cycle Assessment (ELCA) (Ayres et al, 1998;Cornelissen & Hirs, 2002) are some of these approaches, which usually measure the amount of exergy consumed, or destroyed, in a process. Thus, the less exergy a process consumes, or destroys, the most sustainable it is.…”

Section: Exergy and Sustainabilitymentioning

confidence: 99%

Business and Environment Performance Evaluation in Supply Chains: A Formal Model-Driven Approach

Alves¹,

Maciel²,

Lima³

et al. 2011

Supply Chain Management - Applications and Simulations

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“…From the thermodynamic point of view, the imperfection of resources management can be investigated by means of exergy analysis. The concept of exergy cost [1] or cumulative exergy consumption [2][3] that are defined as the total amount of exergy needed to produce a unit of exergy of useful product, can be used to investigate the process of resources cost formation along the production chain. The cost increases through the chain of linked processes being dependent on the irreversibility of each component of that chain, not only on the final production stage.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Ecological Evaluation of Nuclear Power Plant within the Whole Life Cycle

et al. 2015

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Polish energy sector is mainly based on coal combustion, which is responsible for increasing the CO2 emission. Simultaneously, European trends toward sustainability and global warming mitigation will lead to significant changes in the structure of electricity generation in Poland. Due to the domestic energy policy the increase of renewable resources utilisation, as well as installation of first nuclear power units (3x1.6 GWel), are planned in the perspective of the year 2030. The comparison of nuclear power plant with the existing coal ones requires the evaluation within the whole life cycle as well as the application of the common measure of the consumption of natural resources. Both requirements are fulfilled in the case of Thermo-Ecological Cost (TEC) analysis. TEC was introduced by Szargut and expresses the cumulative exergy consumption of non-renewable resources burdening the final consumed goods, e.g. electricity. Moreover, TEC takes into account the additional non-renewable exergy consumption required for mitigation of environmental losses caused by rejection of harmful waste products. In the paper, the TEC algorithm adopted for nuclear power plant is presented. In this case, the whole life cycle includes the following phases: 1) mining and milling, 2) conversion of fuel, 3) enrichment (diffusion or centrifuge), 4) fuel fabrication, 5) plant construction, 6) plant operations, 7) waste management, 8) plant decommissioning and 9) transport. The obtained results are compared with the average TEC index for the Polish energy mix. The direct exergy analysis shows that the direct exergetic efficiency of existing nuclear power unit is about 10% points lower than that of typical coal power unit. However, the TEC analysis proved that in the whole life cycle of the resource utilisation the exergetic efficiency is significantly lower in the case of the nuclear fuel cycle. The main cause of this imperfection appears in the stage of conversion, enrichment and nuclear fuel fabrication.

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Cumulative exergy consumption and cumulative degree of perfection of chemical processes

Cited by 214 publications

References 5 publications

Life Cycle Exergy Analysis of Renewable Energy Systems

Life Cycle Exergy Analysis of Renewable Energy Systems

Business and Environment Performance Evaluation in Supply Chains: A Formal Model-Driven Approach

Thermo-Ecological Evaluation of Nuclear Power Plant within the Whole Life Cycle

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