Abstract:This paper attempts to quantify the sustainability of technological processes. It is based on thermodynamics with energy carriers and materials (products, waste, etc.) expressed in the same calculable quantity-exergy (Joule). The results have three considerations. One factor reflects to that extent renewable resources are used. In addition, the technological efficiency has to be accounted for as it affects sustainability. Finally, the results take into account the generation of waste products and the exergy re… Show more
“…Solar driven closed cycle condition for a sustainable ecosphere/technosphere interaction [11]. [Color figure can be viewed at wileyonlinelibrary.com] Figure 3.…”
Section: Socialmentioning
confidence: 99%
“…Exchange of resources and waste in a sustainable ecosphere/technosphere system. See text above for a discussion of the parameters [11]. [Color figure can be viewed at wileyonlinelibrary.com]…”
“…Solar driven closed cycle condition for a sustainable ecosphere/technosphere interaction [11]. [Color figure can be viewed at wileyonlinelibrary.com] Figure 3.…”
Section: Socialmentioning
confidence: 99%
“…Exchange of resources and waste in a sustainable ecosphere/technosphere system. See text above for a discussion of the parameters [11]. [Color figure can be viewed at wileyonlinelibrary.com]…”
“…The exergy analysis of the photovoltaic panel uses data of a sustainability analysis [40]. Based on our previous study [30] the overall exergy efficiency of the photovoltaic panel using multicrystalline Si solar cells is considered to be 12.74%.…”
Section: Exergy Analysis Of Primary Energy Sourcesmentioning
Electrifying transportation is a promising approach to alleviate climate change issues arising from increased emissions. This study examines a system for the production of hydrogen using renewable energy sources as well as its use in buses. The electricity requirements for the production of hydrogen through the electrolysis of water, are covered by renewable energy sources. Fuel cells are being used to utilize hydrogen to power the bus. Exergy analysis for the system is carried out. Based on a steady-state model of the processes, exergy efficiencies are calculated for all subsystems. The subsystems with the highest proportion of irreversibility are identified and compared. It is shown that PV panel has exergetic efficiency of 12.74%, wind turbine of 45%, electrolysis of 67%, and fuel cells of 40%.
“…A similar indicator has been used in assessing the performance of strawberry cultivation in greenhouses by different heating methods (Hepbasli, 2011). Dewulf et al (2000) introduced the exergetic renewability defined as the renewable exergy fraction used over the total exergy input, and the environmental compatibility defined as the total exergy input over the total exergy input plus the exergy required to abate emissions and wastes. Another promising indicator is eco-exergy, a concept developed by Jørgensen (2007), in which the embodied information in living organisms in the form of DNA is assigned as potential energy work.…”
Assessment of sustainability will become more relevant for the food industry in the years to come. Analysis based on exergy, including the use of exergetic indicators and Grassmann diagrams, is a useful tool for the quantitative and qualitative assessment of the efficiency of industrial food chains. In this paper, we review the methodology of exergy analysis and the exergetic indicators that are most appropriate for use in the food industry. The challenges of applying exergy analysis in industrial food chains and the specific features of food processes are also discussed.
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