Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator
Increasing use of fossil fuels has led to serious consequences on the environment including global warming, pollution, and increased costs of heating systems. This indicates the importance of improving the efficiency of devices used in heating and air conditioning systems such as heat exchangers. In...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-12-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X21007504 |
| _version_ | 1819102093936427008 |
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| author | Heng Chen Hamdi Ayed Riadh Marzouki Faezeh Emami Ibrahim Mahariq Fahd Jarad |
| author_facet | Heng Chen Hamdi Ayed Riadh Marzouki Faezeh Emami Ibrahim Mahariq Fahd Jarad |
| author_sort | Heng Chen |
| collection | DOAJ |
| description | Increasing use of fossil fuels has led to serious consequences on the environment including global warming, pollution, and increased costs of heating systems. This indicates the importance of improving the efficiency of devices used in heating and air conditioning systems such as heat exchangers. In this study, it was tried to enhance the performance of the heat exchanger by simultaneous use of a flat tube as a central tube of the heat exchanger and dual conic turbulator. In addition to plain conical turbulator, the influence of the conical turbulator with aerodynamic geometry was investigated on the heat transfer and pressure drop. Finally, economic evaluation of the studied cases was done based on the thermal performance enhancement factor (TEF) and the net profit of unit transferred heat load (ηp). Tests were conducted in the hot water flow rate ranging 0.033–0.0678 L/s while cold water flow rate was kept constant at 0.166 L/s. The results indicated that the heat transfers and exergy loss of the flat tube heat exchanger with a dual modified conical turbulator was up to 33% and 30% higher than the plain tube heat exchanger, respectively. Also, a heat exchanger with a modified dual turbulator with convergent embellishment (case B) selected as the economic case and has the highest TEF and ηp . It was revealed that the application of enhanced conical turbulator would lead in the increment of ηp up to 1.26 times. |
| first_indexed | 2024-12-22T01:29:05Z |
| format | Article |
| id | doaj.art-4f3b96432dda450cad3d85ea4cdb72f5 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-22T01:29:05Z |
| publishDate | 2021-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-4f3b96432dda450cad3d85ea4cdb72f52022-12-21T18:43:33ZengElsevierCase Studies in Thermal Engineering2214-157X2021-12-0128101587Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulatorHeng Chen0Hamdi Ayed1Riadh Marzouki2Faezeh Emami3Ibrahim Mahariq4Fahd Jarad5School of Science, Xijing University, Xi'an, Shaanxi, 710123, China; Shaanxi Engineering Research Center of Controllable Neutron Source,Xijing University, Xi'an, Shaanxi, 710123, China; Corresponding author. School of Science, Xijing University, Xi'an, Shaanxi, 710123, China.Department of Civil Engineering, College of Engineering, King Khalid University, Abha, 61421, Saudi Arabia; Higher Institute of Transport and Logistics of Sousse, University Sousse, TunisiaDepartment of Chemistry, College of Science, King Khalid University, Abha, 61421, Saudi ArabiaSustainable Management of Natural Resources and Environment Research Group, Faculty of Environment and Labour Safety, Ton Duc Thang University, Ho Chi Minh City, Viet Nam; Corresponding author.College of Engineering and Technology, American University of the Middle East, KuwaitDepartment of Mathematics, Cankaya University, Etimesgut, Ankara, Turkey; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan; Corresponding author. Department of Mathematics, Cankaya University, Etimesgut, Ankara, Turkey.Increasing use of fossil fuels has led to serious consequences on the environment including global warming, pollution, and increased costs of heating systems. This indicates the importance of improving the efficiency of devices used in heating and air conditioning systems such as heat exchangers. In this study, it was tried to enhance the performance of the heat exchanger by simultaneous use of a flat tube as a central tube of the heat exchanger and dual conic turbulator. In addition to plain conical turbulator, the influence of the conical turbulator with aerodynamic geometry was investigated on the heat transfer and pressure drop. Finally, economic evaluation of the studied cases was done based on the thermal performance enhancement factor (TEF) and the net profit of unit transferred heat load (ηp). Tests were conducted in the hot water flow rate ranging 0.033–0.0678 L/s while cold water flow rate was kept constant at 0.166 L/s. The results indicated that the heat transfers and exergy loss of the flat tube heat exchanger with a dual modified conical turbulator was up to 33% and 30% higher than the plain tube heat exchanger, respectively. Also, a heat exchanger with a modified dual turbulator with convergent embellishment (case B) selected as the economic case and has the highest TEF and ηp . It was revealed that the application of enhanced conical turbulator would lead in the increment of ηp up to 1.26 times.http://www.sciencedirect.com/science/article/pii/S2214157X21007504Double tube heat exchangerFlat tubeModified conical turbulatorHeat transferPressure drop |
| spellingShingle | Heng Chen Hamdi Ayed Riadh Marzouki Faezeh Emami Ibrahim Mahariq Fahd Jarad Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator Case Studies in Thermal Engineering Double tube heat exchanger Flat tube Modified conical turbulator Heat transfer Pressure drop |
| title | Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator |
| title_full | Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator |
| title_fullStr | Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator |
| title_full_unstemmed | Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator |
| title_short | Thermal, hydraulic, exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator |
| title_sort | thermal hydraulic exergitic and economic evaluation of a flat tube heat exchanger equipped with a plain and modified conical turbulator |
| topic | Double tube heat exchanger Flat tube Modified conical turbulator Heat transfer Pressure drop |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X21007504 |
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