Browsing by Author "Bozoglan, Elif"

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Citation - WoS: 1
Citation - Scopus: 1
Enhanced exergetic analysis of an olive oil refining plant: evaluation of the first and second level of exergy destructions
(INDERSCIENCE ENTERPRISES LTD, 2019) Elif Bozoglan; Zafer Erbay; Arif Hepbasli; Huseyin Gunerhan; Erbay, Zafer; Hepbasli, Arif; Bozoglan, Elif; Gunerhan, Huseyin
Enhanced exergy analysis is built up as a novel modality to specify the origins of irreversibilities and to concentrate substantial improvement potential of components. The scope of this paper is to apply the enhanced exergy analysis to an olive oil refinery plant operated in Izmir Turkey that is conducted for the first time to agree the first level (endogenous/exogenous) and the second level (combination of the endogenous/exogenous and unavoidable/avoidable parts studied before) of destructions for exposing substantial efficiencies. Results showed that the components in the plant mostly have endogenous exergy destructions. Besides the distillation unit has the highest endogenous exergy destruction value of 150.9 kW as the avoidable and unavoidable endogenous sections are 76.85 and 74.08 kW respectively. Furthermore the shell and tube economiser has the highest modified (enhanced) exergetic efficiency of 99.9% while the modified performances of plate-heat exchanger and pump (VII) are calculated as 73% and 71.24% respectively.
Citation - WoS: 4
Citation - Scopus: 4
Splitting the exergy destructions of an olive oil refining plant into avoidable and unavoidable parts based on actual operational data
(Inderscience Publishers, 2016) Elif Bozoglan; Zafer Erbay; A. Hepbasli; Huseyin Gunerhan; Erbay, Zafer; Hepbasli, Arif; Bozoglan, Elif; Gunerhan, Huseyin
This study focused on assessing the performance of an olive oil refinery plant (with an oil capacity of 5595 kg/h) located in Izmir Turkey. The analysis was performed with the use of actual operational data of the system components while an advanced exergy analysis method was used. By this way unavoidable and avoidable destructions of olive oil refinery plant components were obtained. The results indicated that the greater part of the exergy destructions detected in the system were avoidable and could be minimised by improvements in the design. The highest exergy destruction rate (217.96 kW) was determined owing to the distillation unit of the system with a markedly high unavoidable exergy destruction ratio of 50.92%. In addition the efficiencies of the components in the plant varied from 5.67% to 90.7% while their corresponding modified exergetic efficiencies were in the range of 8.74% and 92.48%. © 2020 Elsevier B.V. All rights reserved.
Citation - WoS: 81
Citation - Scopus: 92
Sustainable assessment of solar hydrogen production techniques
(Elsevier Ltd, 2012) Elif Bozoglan; Adnan Mi̇di̇lli̇; A. Hepbasli; Hepbasli, Arif; Midilli, Adnan; Bozoglan, Elif
This study addresses some technical issues related to solar hydrogen production methods. In this regard exergy-based environmental and sustainability parameters are applied to an electrolysis process for hydrogen production. Accordingly the environmental destruction index is found to be 0.16 while exergetic benign index is calculated as 6.30. While the exergy efficiency increases from 10 to 90% the sustainability index rises from 0.01 to 8.1. Thus solar hydrogen production should be used for practical applications because of higher exergetic sustainability potential and lower environmental destruction index. © 2012 Elsevier Ltd. © 2017 Elsevier B.V. All rights reserved.