Performance Analysis of WHR Systems for Marine Applications Based on sCO<sub>2</sub> Gas Turbine and ORC
Waste heat recovery (WHR) can represent a solution to improve the efficiency of ships’ propulsion, helping to exceed stringent greenhouse gas emission limits. This is particularly suitable in the case of propulsion based on gas turbines due to their medium-high temperature level of the exhaust gases...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-05-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/16/11/4320 |
| _version_ | 1797597638641582080 |
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| author | Fabrizio Reale Raffaela Calabria Patrizio Massoli |
| author_facet | Fabrizio Reale Raffaela Calabria Patrizio Massoli |
| author_sort | Fabrizio Reale |
| collection | DOAJ |
| description | Waste heat recovery (WHR) can represent a solution to improve the efficiency of ships’ propulsion, helping to exceed stringent greenhouse gas emission limits. This is particularly suitable in the case of propulsion based on gas turbines due to their medium-high temperature level of the exhaust gases. This study analyzes the performance of a hybrid energy grid, in which the heat is recovered by the exhaust gases of an aeroderivative gas turbine, a GE LM2500+, when the bottoming system is a supercritical CO<sub>2</sub> gas turbine. Given the issues and peculiarities related to the onboard installation, where size and weight are fundamental concerns, six WHR schemes have been analyzed. They span from the simple cycle to partial preheated and regenerative, to a cascade layout in which an ORC system receives thermal power by the sCO<sub>2</sub> GT. The influence of the seawater temperature on the performance of the hybrid energy system has been also considered. The energetic and exergetic performance comparison of the different schemes has been carried out by using the commercial software Thermoflex. The results showed that an increase in overall performance by up to 29% can be obtained and that the increase in seawater temperature can lead to a decrease in the overall performance. |
| first_indexed | 2024-03-11T03:08:24Z |
| format | Article |
| id | doaj.art-36c4ec44519f4df8b6a428eacb497f6f |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-11T03:08:24Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-36c4ec44519f4df8b6a428eacb497f6f2023-11-18T07:47:18ZengMDPI AGEnergies1996-10732023-05-011611432010.3390/en16114320Performance Analysis of WHR Systems for Marine Applications Based on sCO<sub>2</sub> Gas Turbine and ORCFabrizio Reale0Raffaela Calabria1Patrizio Massoli2Institute of Sciences and Technologies for Sustainable Energy and Mobility, STEMS-CNR, 80125 Naples, ItalyInstitute of Sciences and Technologies for Sustainable Energy and Mobility, STEMS-CNR, 80125 Naples, ItalyInstitute of Sciences and Technologies for Sustainable Energy and Mobility, STEMS-CNR, 80125 Naples, ItalyWaste heat recovery (WHR) can represent a solution to improve the efficiency of ships’ propulsion, helping to exceed stringent greenhouse gas emission limits. This is particularly suitable in the case of propulsion based on gas turbines due to their medium-high temperature level of the exhaust gases. This study analyzes the performance of a hybrid energy grid, in which the heat is recovered by the exhaust gases of an aeroderivative gas turbine, a GE LM2500+, when the bottoming system is a supercritical CO<sub>2</sub> gas turbine. Given the issues and peculiarities related to the onboard installation, where size and weight are fundamental concerns, six WHR schemes have been analyzed. They span from the simple cycle to partial preheated and regenerative, to a cascade layout in which an ORC system receives thermal power by the sCO<sub>2</sub> GT. The influence of the seawater temperature on the performance of the hybrid energy system has been also considered. The energetic and exergetic performance comparison of the different schemes has been carried out by using the commercial software Thermoflex. The results showed that an increase in overall performance by up to 29% can be obtained and that the increase in seawater temperature can lead to a decrease in the overall performance.https://www.mdpi.com/1996-1073/16/11/4320waste heat recoveryWHR for marine applicationssCO<sub>2</sub> gas turbineORChybrid energy systemperformance analysis of WHR system |
| spellingShingle | Fabrizio Reale Raffaela Calabria Patrizio Massoli Performance Analysis of WHR Systems for Marine Applications Based on sCO<sub>2</sub> Gas Turbine and ORC Energies waste heat recovery WHR for marine applications sCO<sub>2</sub> gas turbine ORC hybrid energy system performance analysis of WHR system |
| title | Performance Analysis of WHR Systems for Marine Applications Based on sCO<sub>2</sub> Gas Turbine and ORC |
| title_full | Performance Analysis of WHR Systems for Marine Applications Based on sCO<sub>2</sub> Gas Turbine and ORC |
| title_fullStr | Performance Analysis of WHR Systems for Marine Applications Based on sCO<sub>2</sub> Gas Turbine and ORC |
| title_full_unstemmed | Performance Analysis of WHR Systems for Marine Applications Based on sCO<sub>2</sub> Gas Turbine and ORC |
| title_short | Performance Analysis of WHR Systems for Marine Applications Based on sCO<sub>2</sub> Gas Turbine and ORC |
| title_sort | performance analysis of whr systems for marine applications based on sco sub 2 sub gas turbine and orc |
| topic | waste heat recovery WHR for marine applications sCO<sub>2</sub> gas turbine ORC hybrid energy system performance analysis of WHR system |
| url | https://www.mdpi.com/1996-1073/16/11/4320 |
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