Exergy Analysis as a Developed Concept of Energy Efficiency Optimized Processes: The Case of Thermal Spray Processes

Taheri, Kamran; Gadow, Rainer; Killinger, Andreas

doi:10.1016/j.procir.2014.01.060

Cited by 27 publications

(21 citation statements)

References 5 publications

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“…EA uses a one-step conversion procedure to transform physical units of energy inputs of the system via conversion factors (called "energy coefficients") into total fossil energy [5]. According to Taheri et al [23] the higher temperature in the system process, the smaller is exergy destruction, hence an energy efficiency evaluation would not be much different compared to the evaluation of exergy efficiency. In addition to quantifying exergy efficiency and exergy destruction, the increased process timespan leads to magnifying the exergy destruction value.…”

Section: Exergy Analysismentioning

confidence: 99%

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Energy efficiency in an integrated agro-ecosystem within an acidic soil area of the Mekong delta, Vietnam

Thảo

Tung²,

Thao³

et al. 2020

Preprint

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Background: Both exergy and energy analysis methodologies are used for analysing energy efficiencies in various processes, including agriculture. This study focuses on the connection of three main process components (husbandry-crop-fishpond) in a typical farming household located within an acid soil region of rural Vietnam. The concept of exergy analysis is used to underline the potential for resource efficiency in alternative processes in the agricultural system. For development of an integrated ecological system aiming towards zero-emissions, the analytical methods of material cycles and energy flows utilized a set of indicators of resource efficiency in a sustainable agriculture.Results: The design of the ideal integrated farming system “Agro-Industrial Zero Emissions Systems” (AIZES) can increase the system efficiency by making use of indigenous natural materials and waste reuse/recycling. Recycling waste produce energy, fish feed and fertilizer can result in a decreased environmental load of approximately half. Using exergy analysis to calculate an indicator non-renewable yield ratio (NRYR), the systems verified sustainability of agriculture production.Conclusions: The farming household will be able to subsidize their fuel and electricity consumption by utilizing biogas.. Surplus biogas will be distributed to proximate households, further creating sustainable goals. Biochar, created by mixing the biomass residues with local plants, will improve soil quality and pig sludge, mixed with biomass residue, will create high-quality fertilizer.

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Section: Exergy Analysismentioning

confidence: 99%

“…Exergy and energy analysis methods are basically used in analysis and comparison of energy in intensive manufacturing processes. Thermodynamic methodologies manifest energy efficiency evaluation in manufacturing processes, implying exergy as well as energy balance [13,18,19,21,23,25].…”

Section: Introductionmentioning

confidence: 99%

Energy efficiency in an integrated agro-ecosystem within an acidic soil area of the Mekong delta, Vietnam

Thảo

Tung²,

Thao³

et al. 2020

Preprint

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“…Among energy efficiency optimization approaches, thermodynamics methodologies contribute toward the improvement of energy efficiency in manufacturing processes. Besides energy balance, exergy has been recently considered as a practical thermodynamics method for system's energy evaluation [11].…”

Section: Introductionmentioning

confidence: 99%

Conducting exergy analysis by utilizing condenser waste heat in commercial type split air conditioner: a case study

Çakır

Sansli

2020

SN Appl. Sci.

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The results of this study showed that the modified version of the appliance integrated with the boiler exhibited an increased coefficient of performance (COP) during normal operation when compared with that of the original appliance during normal operation. Thus, the appliance could achieve a significant increase in efficiency while reducing electricity consumption and increasing capacity, thereby heating the water without additional expense. In current models in the market, there is a need for the user to program the timing of hot water using a controller and the appliance operates with a boiler system during the programmed times. These models are difficult to operate. However, once the controller is set, further adjustments are not required; this makes them user-friendly. Once the model has been programmed by the user, the appliance can no longer perform the heating or cooling function in the building while operating the boiler. This gives rise to losses in the comfort and regime of the building, while the appliance continues to consume electricity. Such problems are not recorded in the device as it conducts boiler heating-cooling function in parallel with each other and on the contrary, it continues to comfort the environment without pausing environment heating-cooling and consuming extra electricity while heating the water in the boiler and it also increases the performance of the device. As a result of the above calculations and the results obtained, the COP at the time of normal operation of the appliance was 2.89 and the COP of the appliance modified with the boiler at the time of operation was 4.54. The COP of the appliance increased approximately 1.6 times with the boiler modification. With this application, it has become possible to safeguard both the environment and the users by using domestic hot water for heating in commercial type split air conditioners. For energy saving providers, this value is quite good. This study is aimed at reducing energy consumption and increase efficiency. Case StudySN Applied Sciences (2020) 2:200 | https://doi. Graphic abstract Schematic description of the applicationKeywords Split air conditioner · Exergy analysis · Heat pump · Efficiency · Thermodynamic Publisher's Note Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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“…Hence, the utilization of indigenous plants, adapted to the special conditions of acid soil, associated with the reuse of waste will be able to maximize the production efficiency. According to Taheri et al [23] an exergy analysis incorporating both exergy efficiency and exergy destruction underlines the ineffective energy use in alternative processes. Inefficiencies in energy loss, as heat, and emissions occur through the irreversibility within the process to the environment.…”

Section: Introductionmentioning

confidence: 99%

Energy efficiency in an integrated agro-ecosystem within an acidic soil area of the Mekong Delta, Vietnam

et al. 2020

View full text Add to dashboard Cite

Background Both exergy and energy analysis methodologies are used for analysing energy efficiencies in various processes, including agriculture. This study focuses on the connection of three main process components (husbandry-crop-fishpond) in a typical farming household located within an acid soil region of rural Vietnam. The concept of exergy analysis is used to underline the potential for resource efficiency in alternative processes in the agricultural system. For development of an integrated ecological system aiming towards zero emissions, the analytical methods of material cycles and energy flows utilized a set of indicators of resource efficiency in a sustainable agriculture. Results The design of the ideal integrated farming system “Agro-Industrial Zero Emissions Systems” (AIZES) can increase the system efficiency by making use of indigenous natural materials and waste reuse/recycling. Recycling waste produce energy, fish feed and fertilizer can result in a decreased environmental load of approximately half. Using exergy analysis to calculate an indicator non-renewable yield ratio (NRYR), the systems verified sustainability of agriculture production. Conclusions The farming household will be able to subsidize their fuel and electricity consumption by utilizing biogas. Surplus biogas will be distributed to proximate households, further creating sustainable goals. Biochar, created by mixing the biomass residues with local plants, will improve soil quality and pig sludge, mixed with biomass residue, will create high-quality fertilizer.

show abstract

Exergy Analysis as a Developed Concept of Energy Efficiency Optimized Processes: The Case of Thermal Spray Processes

Cited by 27 publications

References 5 publications

Energy efficiency in an integrated agro-ecosystem within an acidic soil area of the Mekong delta, Vietnam

Energy efficiency in an integrated agro-ecosystem within an acidic soil area of the Mekong delta, Vietnam

Conducting exergy analysis by utilizing condenser waste heat in commercial type split air conditioner: a case study

Energy efficiency in an integrated agro-ecosystem within an acidic soil area of the Mekong Delta, Vietnam

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