Marine engine efficiency improvement with supercritical-CO2 Rankine waste heat recovery

Turgay Koroglu; Irfan Cavus; Muhammed Umar Bayer

doi:10.1504/IJEX.2023.129801

Marine engine efficiency improvement with supercritical-CO₂ Rankine waste heat recovery

Turgay Koroglu^*, Irfan Cavus, Muhammed Umar Bayer

^*Corresponding author for this work

Naval Architecture, Ocean And Marine Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

7 Downloads (Pure)

Abstract

The efficiency of marine energy systems gains more and more importance considering economic and environmental effects. Additional power is produced by annexation of a supercritical CO₂ Rankine cycle (sCO₂-RC) via utilisation of the exhaust of a marine engine. A parametric study on sCO₂-RC is carried out to optimise objective functions such as ECOP, maximum net power output with respect to the outlet temperature of the exhaust stack, and the maximum pressure of the cycle. Then, energy and exergy analyses are applied to the system. Results show that the sCO₂-RC system improves thermal efficiency by 8.17% and provides a 7.54% better fuel economy, while exergy efficiency of the sCO₂-RC is 51.3% with a net power output of 321.7 kW and ECOP of 1.09. Hence, the results lead to the optimisation order of the investigated system components for the improvement in overall efficiency, and the reduction of fuel consumption and environmental effects.

Original language	English
Pages (from-to)	347-364
Number of pages	18
Journal	International Journal of Exergy
Volume	40
Issue number	3
DOIs	https://doi.org/10.1504/IJEX.2023.129801
Publication status	Published - 27 Mar 2023

Keywords

ECOP
environmental effects
exergy
fuel economy
supercritical CO2 Rankine cycle
waste heat recovery

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1504/IJEX.2023.129801

Koroglu-etal-IJE-2023-Marine-engine-efficiency-improvement-with-supercritical-CO2-Rankine-waste-heat-recoveryAccepted author manuscript, 1.29 MBLicence: Strath_1

Cite this

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title = "Marine engine efficiency improvement with supercritical-CO2 Rankine waste heat recovery",

abstract = "The efficiency of marine energy systems gains more and more importance considering economic and environmental effects. Additional power is produced by annexation of a supercritical CO2 Rankine cycle (sCO2-RC) via utilisation of the exhaust of a marine engine. A parametric study on sCO2-RC is carried out to optimise objective functions such as ECOP, maximum net power output with respect to the outlet temperature of the exhaust stack, and the maximum pressure of the cycle. Then, energy and exergy analyses are applied to the system. Results show that the sCO2-RC system improves thermal efficiency by 8.17% and provides a 7.54% better fuel economy, while exergy efficiency of the sCO2-RC is 51.3% with a net power output of 321.7 kW and ECOP of 1.09. Hence, the results lead to the optimisation order of the investigated system components for the improvement in overall efficiency, and the reduction of fuel consumption and environmental effects.",

keywords = "ECOP, environmental effects, exergy, fuel economy, supercritical CO2 Rankine cycle, waste heat recovery",

author = "Turgay Koroglu and Irfan Cavus and Bayer, {Muhammed Umar}",

note = "Copyright {\textcopyright} 2023 Inderscience Enterprises Ltd.",

year = "2023",

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doi = "10.1504/IJEX.2023.129801",

language = "English",

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TY - JOUR

T1 - Marine engine efficiency improvement with supercritical-CO2 Rankine waste heat recovery

AU - Koroglu, Turgay

AU - Cavus, Irfan

AU - Bayer, Muhammed Umar

PY - 2023/3/27

Y1 - 2023/3/27

N2 - The efficiency of marine energy systems gains more and more importance considering economic and environmental effects. Additional power is produced by annexation of a supercritical CO2 Rankine cycle (sCO2-RC) via utilisation of the exhaust of a marine engine. A parametric study on sCO2-RC is carried out to optimise objective functions such as ECOP, maximum net power output with respect to the outlet temperature of the exhaust stack, and the maximum pressure of the cycle. Then, energy and exergy analyses are applied to the system. Results show that the sCO2-RC system improves thermal efficiency by 8.17% and provides a 7.54% better fuel economy, while exergy efficiency of the sCO2-RC is 51.3% with a net power output of 321.7 kW and ECOP of 1.09. Hence, the results lead to the optimisation order of the investigated system components for the improvement in overall efficiency, and the reduction of fuel consumption and environmental effects.

AB - The efficiency of marine energy systems gains more and more importance considering economic and environmental effects. Additional power is produced by annexation of a supercritical CO2 Rankine cycle (sCO2-RC) via utilisation of the exhaust of a marine engine. A parametric study on sCO2-RC is carried out to optimise objective functions such as ECOP, maximum net power output with respect to the outlet temperature of the exhaust stack, and the maximum pressure of the cycle. Then, energy and exergy analyses are applied to the system. Results show that the sCO2-RC system improves thermal efficiency by 8.17% and provides a 7.54% better fuel economy, while exergy efficiency of the sCO2-RC is 51.3% with a net power output of 321.7 kW and ECOP of 1.09. Hence, the results lead to the optimisation order of the investigated system components for the improvement in overall efficiency, and the reduction of fuel consumption and environmental effects.

KW - ECOP

KW - environmental effects

KW - exergy

KW - fuel economy

KW - supercritical CO2 Rankine cycle

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DO - 10.1504/IJEX.2023.129801

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