Comparison of exergy and advanced exergy analysis in three different organic rankine cycles

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Comparison of exergy and advanced exergy analysis in three different organic rankine cycles. / Dibazar, Shahab Yousefizadeh; Salehi, Gholamreza; Davarpanah, Afshin.

In: Processes, Vol. 8, No. 5, 586, 14.05.2020.

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Dibazar, Shahab Yousefizadeh ; Salehi, Gholamreza ; Davarpanah, Afshin. / Comparison of exergy and advanced exergy analysis in three different organic rankine cycles. In: Processes. 2020 ; Vol. 8, No. 5.

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@article{408fa9c93ee7410ab5f42b4c8059ae1a,
title = "Comparison of exergy and advanced exergy analysis in three different organic rankine cycles",
abstract = "Three types of organic Rankine cycles (ORCs): basic ORC (BORC), ORC with single regeneration (SRORC) and ORC with double regeneration (DRORC) under the same heat source have been simulated in this study. In the following, the energy and exergy analysis and the advanced exergy analysis of these three cycles have been performed and compared. With a conventional exergy analysis, researchers can just evaluate the performance of components separately to find the one with the highest amount of exergy destruction. Advanced analysis divides the exergy destruction rate into unavoidable and avoidable, as well as endogenous and exogenous, parts. This helps designers find more data about the effect of each component on other components and the real potential of each component to improve its efficiency. The results of the advanced exergy analysis illustrate that regenerative ORCs have high potential for reducing irreversibilities compared with BORC. Total exergy destruction rates of 4.13 kW (47%) and 5.25 kW (45%) happen in avoidable/endogenous parts for SRORC and DRORC, respectively. Additionally, from an advanced exergy analysis viewpoint, the priority of improvement for system components is given to turbines, evaporators, condensers and feed-water heaters, respectively.",
keywords = "Advanced exergy analysis, Exergy, Organic Rankine cycle, Regenerative cycle",
author = "Dibazar, {Shahab Yousefizadeh} and Gholamreza Salehi and Afshin Davarpanah",
year = "2020",
month = may,
day = "14",
doi = "10.3390/PR8050586",
language = "English",
volume = "8",
journal = "Hydrological Processes",
issn = "0885-6087",
publisher = "Wiley",
number = "5",

}

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TY - JOUR

T1 - Comparison of exergy and advanced exergy analysis in three different organic rankine cycles

AU - Dibazar, Shahab Yousefizadeh

AU - Salehi, Gholamreza

AU - Davarpanah, Afshin

PY - 2020/5/14

Y1 - 2020/5/14

N2 - Three types of organic Rankine cycles (ORCs): basic ORC (BORC), ORC with single regeneration (SRORC) and ORC with double regeneration (DRORC) under the same heat source have been simulated in this study. In the following, the energy and exergy analysis and the advanced exergy analysis of these three cycles have been performed and compared. With a conventional exergy analysis, researchers can just evaluate the performance of components separately to find the one with the highest amount of exergy destruction. Advanced analysis divides the exergy destruction rate into unavoidable and avoidable, as well as endogenous and exogenous, parts. This helps designers find more data about the effect of each component on other components and the real potential of each component to improve its efficiency. The results of the advanced exergy analysis illustrate that regenerative ORCs have high potential for reducing irreversibilities compared with BORC. Total exergy destruction rates of 4.13 kW (47%) and 5.25 kW (45%) happen in avoidable/endogenous parts for SRORC and DRORC, respectively. Additionally, from an advanced exergy analysis viewpoint, the priority of improvement for system components is given to turbines, evaporators, condensers and feed-water heaters, respectively.

AB - Three types of organic Rankine cycles (ORCs): basic ORC (BORC), ORC with single regeneration (SRORC) and ORC with double regeneration (DRORC) under the same heat source have been simulated in this study. In the following, the energy and exergy analysis and the advanced exergy analysis of these three cycles have been performed and compared. With a conventional exergy analysis, researchers can just evaluate the performance of components separately to find the one with the highest amount of exergy destruction. Advanced analysis divides the exergy destruction rate into unavoidable and avoidable, as well as endogenous and exogenous, parts. This helps designers find more data about the effect of each component on other components and the real potential of each component to improve its efficiency. The results of the advanced exergy analysis illustrate that regenerative ORCs have high potential for reducing irreversibilities compared with BORC. Total exergy destruction rates of 4.13 kW (47%) and 5.25 kW (45%) happen in avoidable/endogenous parts for SRORC and DRORC, respectively. Additionally, from an advanced exergy analysis viewpoint, the priority of improvement for system components is given to turbines, evaporators, condensers and feed-water heaters, respectively.

KW - Advanced exergy analysis

KW - Exergy

KW - Organic Rankine cycle

KW - Regenerative cycle

UR - http://www.scopus.com/inward/record.url?scp=85086098524&partnerID=8YFLogxK

U2 - 10.3390/PR8050586

DO - 10.3390/PR8050586

M3 - Article

AN - SCOPUS:85086098524

VL - 8

JO - Hydrological Processes

JF - Hydrological Processes

SN - 0885-6087

IS - 5

M1 - 586

ER -

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