Enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators – Thermal modeling and parametric analysis
The rising demand for sustainable energy solutions has made the utilization of waste heat from industrial processes a priority. Thermoelectric generators present an effective method for recovering and converting waste heat into useable electrical energy, therefore enhancing energy efficiency and sus...
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| Format: | Article |
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KeAi Communications Co., Ltd.
2025-04-01
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| Series: | Unconventional Resources |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666519025000147 |
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| author | Obeida Farhat Mahmoud Khaled Jalal Faraj Khaled Chahine Farouk Hachem Cathy Castelain |
| author_facet | Obeida Farhat Mahmoud Khaled Jalal Faraj Khaled Chahine Farouk Hachem Cathy Castelain |
| author_sort | Obeida Farhat |
| collection | DOAJ |
| description | The rising demand for sustainable energy solutions has made the utilization of waste heat from industrial processes a priority. Thermoelectric generators present an effective method for recovering and converting waste heat into useable electrical energy, therefore enhancing energy efficiency and sustainability. This study presents a parametric study of thermoelectric generators for waste heat recovery from heating chimney exhaust. In order to investigate the impact of placing the thermoelectric generators at different locations, simplified thermal resistance modeling was performed. Performance metrics demonstrate that the positioning of the thermoelectric generator site can bring about major improvements including thermal resistance, generated power, temperature of water heated, and energy conversion efficiency, which ranged from 0.57 % to 5.6 %, depending on thermoelectric generators configuration and operating parameters. By positioning thermoelectric generators on the exterior walls of the exhaust pipe, close to the heat source, a significant amount of electrical power—up to 37.67 W—could be produced. Additionally, a parametric analysis was conducted on important operating parameters: the mass flow rate and input temperatures of the exhaust gas and water. The application of 6 different cases showed that Case 5 of thermoelectric generator modules, with ṁg = 0.25 kg/s, Tg,i = 390 °C, ṁw = 0.3 kg/s and Tw,i = 20 °C, was the optimal condition, based on observations. The results demonstrate notable advancements in power production and energy recovery, and includes clear recommendations for future research that will bring about a shift in the direction of sustainable industrial operations. |
| format | Article |
| id | doaj-art-b154ea917ab74b6ca8d14c65966899ea |
| institution | Kabale University |
| issn | 2666-5190 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Unconventional Resources |
| spelling | doaj-art-b154ea917ab74b6ca8d14c65966899ea2025-01-22T05:44:09ZengKeAi Communications Co., Ltd.Unconventional Resources2666-51902025-04-016100148Enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators – Thermal modeling and parametric analysisObeida Farhat0Mahmoud Khaled1Jalal Faraj2Khaled Chahine3Farouk Hachem4Cathy Castelain5Nantes Université, CNRS, Laboratoire de Thermique et Energie de Nantes, LTeN, UMR6607, F-44000, Nantes, France; Energy and Thermo-Fluid Group, Lebanese International University LIU, Bekaa, LebanonEnergy and Thermo-Fluid Group, Lebanese International University LIU, Bekaa, Lebanon; Energy and Thermo-Fluid Group, The International University of Beirut BIU, Beirut, Lebanon; Corresponding author. Energy and Thermo-Fluid Group, Lebanese International University LIU, Bekaa, LebanonEnergy and Thermo-Fluid Group, Lebanese International University LIU, Bekaa, Lebanon; Energy and Thermo-Fluid Group, The International University of Beirut BIU, Beirut, LebanonCollege of Engineering and Technology, American University of the Middle East, KuwaitEnergy and Thermo-Fluid Group, Lebanese International University LIU, Bekaa, LebanonNantes Université, CNRS, Laboratoire de Thermique et Energie de Nantes, LTeN, UMR6607, F-44000, Nantes, FranceThe rising demand for sustainable energy solutions has made the utilization of waste heat from industrial processes a priority. Thermoelectric generators present an effective method for recovering and converting waste heat into useable electrical energy, therefore enhancing energy efficiency and sustainability. This study presents a parametric study of thermoelectric generators for waste heat recovery from heating chimney exhaust. In order to investigate the impact of placing the thermoelectric generators at different locations, simplified thermal resistance modeling was performed. Performance metrics demonstrate that the positioning of the thermoelectric generator site can bring about major improvements including thermal resistance, generated power, temperature of water heated, and energy conversion efficiency, which ranged from 0.57 % to 5.6 %, depending on thermoelectric generators configuration and operating parameters. By positioning thermoelectric generators on the exterior walls of the exhaust pipe, close to the heat source, a significant amount of electrical power—up to 37.67 W—could be produced. Additionally, a parametric analysis was conducted on important operating parameters: the mass flow rate and input temperatures of the exhaust gas and water. The application of 6 different cases showed that Case 5 of thermoelectric generator modules, with ṁg = 0.25 kg/s, Tg,i = 390 °C, ṁw = 0.3 kg/s and Tw,i = 20 °C, was the optimal condition, based on observations. The results demonstrate notable advancements in power production and energy recovery, and includes clear recommendations for future research that will bring about a shift in the direction of sustainable industrial operations.http://www.sciencedirect.com/science/article/pii/S2666519025000147HybridizationChimneyExhaust gasHeat recoveryThermoelectric generator |
| spellingShingle | Obeida Farhat Mahmoud Khaled Jalal Faraj Khaled Chahine Farouk Hachem Cathy Castelain Enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators – Thermal modeling and parametric analysis Unconventional Resources Hybridization Chimney Exhaust gas Heat recovery Thermoelectric generator |
| title | Enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators – Thermal modeling and parametric analysis |
| title_full | Enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators – Thermal modeling and parametric analysis |
| title_fullStr | Enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators – Thermal modeling and parametric analysis |
| title_full_unstemmed | Enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators – Thermal modeling and parametric analysis |
| title_short | Enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators – Thermal modeling and parametric analysis |
| title_sort | enhancing heat recovery efficiency in chimney exhaust systems using thermoelectric generators thermal modeling and parametric analysis |
| topic | Hybridization Chimney Exhaust gas Heat recovery Thermoelectric generator |
| url | http://www.sciencedirect.com/science/article/pii/S2666519025000147 |
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