The Evaluation of Thermodynamics and Environmental Impact of Waste Heat Recovery System Using Alternative Refrigerants
Diesel engines play a critical role in numerous sectors due to their robustness and efficiency but contribute significantly to environmental pollution through exhaust emissions. These emissions contain substantial thermal energy, which, if not harnessed, exacerbates air quality issues and global cli...
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EDP Sciences
2025-01-01
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| Series: | E3S Web of Conferences |
| Online Access: | https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/05/e3sconf_icenis2024_01002.pdf |
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| author | Aisyah Nyayu Mukhtar Ariyadi Hifni Ayu Putri Pratiwi Ilham Sugiyanto Fuadi Robith |
| author_facet | Aisyah Nyayu Mukhtar Ariyadi Hifni Ayu Putri Pratiwi Ilham Sugiyanto Fuadi Robith |
| author_sort | Aisyah Nyayu |
| collection | DOAJ |
| description | Diesel engines play a critical role in numerous sectors due to their robustness and efficiency but contribute significantly to environmental pollution through exhaust emissions. These emissions contain substantial thermal energy, which, if not harnessed, exacerbates air quality issues and global climate change. The Organic Rankine Cycle (ORC) offers a promising solution for recovering this waste heat and converting it into mechanical or electrical power. This study conducts thermodynamic simulations using MATLAB to analyze ORC systems for diesel engine exhaust heat recovery, focusing on thermal efficiency, power generation potential, and environmental impact of different refrigerants, specifically R-141b, R-245fa, and R-123. Results indicate that ORC performance is significantly influenced by the refrigerant’s critical temperature. R-141b demonstrates the highest thermal efficiency at 13.13% with a heat source temperature of 120°C but also has the highest environmental impact, contributing 3,090 kgCO2 eq/year. In contrast, R-123 shows the lowest environmental impact at 231 kgCO2 eq/year for direct TEWI and 7.73 kgCO2 eq/year for indirect TEWI, with a slightly lower thermal efficiency of 12.73%. R-245fa, with the lowest efficiency at 12.14%, also has a substantial environmental impact. This research provides insights into optimizing energy recovery from diesel engine waste heat and advancing sustainable energy solutions. |
| format | Article |
| id | doaj-art-fb04608e9f834f8eb0aa6ced1ae10307 |
| institution | Kabale University |
| issn | 2267-1242 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | E3S Web of Conferences |
| spelling | doaj-art-fb04608e9f834f8eb0aa6ced1ae103072025-02-05T10:49:09ZengEDP SciencesE3S Web of Conferences2267-12422025-01-016050100210.1051/e3sconf/202560501002e3sconf_icenis2024_01002The Evaluation of Thermodynamics and Environmental Impact of Waste Heat Recovery System Using Alternative RefrigerantsAisyah Nyayu0Mukhtar Ariyadi Hifni1Ayu Putri Pratiwi Ilham2Sugiyanto3Fuadi Robith4Department of Mechanical Engineering, Vocational School, Universitas Gadjah Mada, Jl. Yacaranda, Sekip Unit IVDepartment of Mechanical and Industrial Engineering, Faculty of Engineering, Universitas Gadjah MadaDepartment of Mechanical Engineering, Vocational School, Universitas Gadjah Mada, Jl. Yacaranda, Sekip Unit IVDepartment of Mechanical Engineering, Vocational School, Universitas Gadjah Mada, Jl. Yacaranda, Sekip Unit IVDepartment of Mechanical Engineering, Vocational School, Universitas Gadjah Mada, Jl. Yacaranda, Sekip Unit IVDiesel engines play a critical role in numerous sectors due to their robustness and efficiency but contribute significantly to environmental pollution through exhaust emissions. These emissions contain substantial thermal energy, which, if not harnessed, exacerbates air quality issues and global climate change. The Organic Rankine Cycle (ORC) offers a promising solution for recovering this waste heat and converting it into mechanical or electrical power. This study conducts thermodynamic simulations using MATLAB to analyze ORC systems for diesel engine exhaust heat recovery, focusing on thermal efficiency, power generation potential, and environmental impact of different refrigerants, specifically R-141b, R-245fa, and R-123. Results indicate that ORC performance is significantly influenced by the refrigerant’s critical temperature. R-141b demonstrates the highest thermal efficiency at 13.13% with a heat source temperature of 120°C but also has the highest environmental impact, contributing 3,090 kgCO2 eq/year. In contrast, R-123 shows the lowest environmental impact at 231 kgCO2 eq/year for direct TEWI and 7.73 kgCO2 eq/year for indirect TEWI, with a slightly lower thermal efficiency of 12.73%. R-245fa, with the lowest efficiency at 12.14%, also has a substantial environmental impact. This research provides insights into optimizing energy recovery from diesel engine waste heat and advancing sustainable energy solutions.https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/05/e3sconf_icenis2024_01002.pdf |
| spellingShingle | Aisyah Nyayu Mukhtar Ariyadi Hifni Ayu Putri Pratiwi Ilham Sugiyanto Fuadi Robith The Evaluation of Thermodynamics and Environmental Impact of Waste Heat Recovery System Using Alternative Refrigerants E3S Web of Conferences |
| title | The Evaluation of Thermodynamics and Environmental Impact of Waste Heat Recovery System Using Alternative Refrigerants |
| title_full | The Evaluation of Thermodynamics and Environmental Impact of Waste Heat Recovery System Using Alternative Refrigerants |
| title_fullStr | The Evaluation of Thermodynamics and Environmental Impact of Waste Heat Recovery System Using Alternative Refrigerants |
| title_full_unstemmed | The Evaluation of Thermodynamics and Environmental Impact of Waste Heat Recovery System Using Alternative Refrigerants |
| title_short | The Evaluation of Thermodynamics and Environmental Impact of Waste Heat Recovery System Using Alternative Refrigerants |
| title_sort | evaluation of thermodynamics and environmental impact of waste heat recovery system using alternative refrigerants |
| url | https://www.e3s-conferences.org/articles/e3sconf/pdf/2025/05/e3sconf_icenis2024_01002.pdf |
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