Warianty tytułu
Zwiększanie wydajności dwururowego wymiennika ciepła poprzez zastosowanie skręconej rury wewnętrznej
Języki publikacji
Abstrakty
This study utilized two double tube-type heat exchangers. The first exchanger employed a smooth inner tube, while the second one utilized a twisted inner tube. The shell was constructed of plastic (PVC), while the tube was made of copper with a length of 1000 mm, an outer diameter of 62.24 mm, a smooth tube inner diameter of 14.2 mm, and an equivalent diameter of 11.8 mm for the twisted tube. To minimize heat loss, the shell was insulated externally with a thermal insulator. A flow rate of 3 liters per minute of hot water was passed through a ring-shaped tunnel, with an inlet temperature of 63 °C, to enhance the heat exchanger's performance. The experimental results of the two heat exchangers (smooth and twisted inner tubes) were compared, and the use of water as the primary fluid led to improved performance. The twisted inner tube-type heat exchanger achieved a maximum efficiency of 0.33 at a volumetric flow rate of 5 liters per minute, while the maximum improvement in effectiveness was 65.71% at a volume flow rate of 3 liters per minute in the twisted inner tube-type heat exchanger.
W badaniach wykorzystano dwa dwururowe wymienniki ciepła. W pierwszym wymienniku zastosowano gładką rurę wewnętrzną, natomiast w drugim zastosowano rurę skręconą. Płaszcz wykonano z poli(chlorku winylu) (PVC), natomiast rura wykonana z miedzi charakteryzowała się następującymi wymiarami: długość 1000 mm, średnica zewnętrzna 62,24 mm, średnica wewnętrzna 14,2 mm i średnica zastępcza dla rury skręconej 11,8 mm. Aby zminimalizować straty ciepła, rura została zaizolowana od zewnątrz izolatorem termicznym. Aby poprawić wydajność wymiennika ciepła, przez tunel w kształcie pierścienia przepuszczano gorącą wodę z szybkością 3 dm3/min., a temperatura na wlocie wynosiła 63°C. Porównano wyniki eksperymentalne dwóch wymienników ciepła (gładkiego i o skręconej rurze wewnętrznej) i stwierdzono, że zastosowanie wody jako płynu roboczego doprowadziło do poprawy wydajności wymiennika. Wymiennik ciepła wykonany ze skręconej rury wewnętrznej osiągnął maksymalną wydajność 0,33 przy objętościowym natężeniu przepływu 5 dm3/min., natomiast maksymalna poprawa efektywności wyniosła 65,71% przy objętościowym natężeniu przepływu 3 dm3/min.
Rocznik
Tom
Strony
159--170
Opis fizyczny
Bibliogr. 26 poz., rys., wykr.
Twórcy
- Northern Technical University/Technical College of Engineering, Kirkuk, Iraq, hussein_kahia@ntu.edu.iq
autor
- Northern Technical University/Technical College of Engineering, Kirkuk, Iraq, fatimaawni89@gmail.com
Bibliografia
- 1. Abbas, E. F., Ali, H. H. M., & Mahmood, N. J. (2021). Comparison between numerical study and experimental work on heat transfer from heat sink under transient conditions. Journal of Mechanical Engineering Research and Developments, 44(7), 141-150.
- 2. Ali, H.H.M., Hussein, A.M., Allami, K.M.H., & Mohamad, B. (2023). Evaluation of shell and tube heat exchanger performance by using ZnO/water nanofluids. Journal of Harbin Institute of Technology (New Series). https://doi.org/10.11916/j.issn.1005-9113.2023001.
- 3. Ali, M.Q., & Mohamad, B. (2022). A review of the design and control using computational fluid dynamics of gasoline direct injection engines. Diagnostyka, 23(3), 1-8. https://doi.org/10.29354/diag/153373.
- 4. Barrak, A. S., Ali, N. M., & Ali, H. H. M. (2022). An effect of binary fluid on the thermal performance of pulsation heat pipe. International Journal of Applied Mechanics and Engineering, 27(1), 21–34. https://doi.org/10.2478/ijame-2022-0002.
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- 7. Berkache, A., Amroune, S., Golbaf, A., & Mohamad, B. (2022). Experimental and numerical investigations of a turbulent boundary layer under variable temperature gradients. Journal of the Serbian Society for Computational Mechanics, 16(1), 1-15. https://doi.org/10.24874/jsscm.2022.16.01.01.
- 8. Eiamsa-Ard, S., Promthaisong, P., Thianpong, C., Pimsarn, M., & Chuwattanakul, V. (2016). Influence of three-start spirally twisted tube combined with triple-channel twisted tape insert on heat transfer enhancement. Chemical Engineering and Processing: Process Intensification, 102, 117–129. https://doi.org/10.1016/j.cep.2016.01.012.
- 9. Eltaweel, M., Abdel‐Rehim, A. A., & Hussien, H. (2020). Indirect thermosiphon flat‐plate solar collector performance based on twisted tube design heat exchanger filled with nanofluid. Intertnational Journal of Energy Research, 44(6), 4269–4278. https://doi.org/10.1002/er.5146.
- 10. Farnam, M., Khoshvaght-Aliabadi, M., & Asadollahzadeh, M. J. (2021). Intensified single-phase forced convective heat transfer with helical-twisted tube in coil heat exchangers. Annals of Nuclear Energy, 154, 108108. https://doi.org/10.1016/j.anucene.2020.108108.
- 11. Hayder, H. Ali, M. Hussein, A. M. Mohammed, K. Allami, H. & Mohamad, B. (2023). Evaluation of shell and tube heat exchanger performance by using ZnO/water nanofluids. Journal of Harbin Institute of Technology (New Series). https://doi.org/10.11916/j.issn.1005-9113.2023001.
- 12. Holman, J. P. (2008). Heat transfer. 6th Ed. Tata McGraw-Hill Education.
- 13. Khoshvaght-Aliabadi, M., & Feizabadi, A. (2020). Performance intensification of tubular heat exchangers using compound twisted-tape and twisted-tube. Chemical Engineering and Processing - Process Intensification, 148, 107799. https://doi.org/10.1016/j.cep.2019.107799.
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- 21. Shrirao, P. N., Sambhe, R. U., & Bodade, P. R. (2013). Experimental investigation on turbulent flow heat transfer enhancement in a horizontal circular pipe using internal threads of varying depth. IOSR Journal of Mechanical and Civil Engineering, 5(3), 23–28.
- 22. Thantharate, V., & Zodpe, D. B. (2013). Experimental and numerical comparison of heat transfer performance of twisted tube and plain tube heat exchangers. International Journal of Scientific & Engineering Research, 4(7), 1107–1113.
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- 25. Wang, L., Sun, D.W., Liang, P., Zhuang, L., & Tan, Y. (2000). Heat transfer characteristics of carbon steel spirally fluted tube for high pressure preheaters. Energy Conversion and Management, 41(10), 993–1005. https://doi.org/10.1016/S0196-8904(99)00159-4.
- 26. Yan, W., Gao, X., Xu, W., Ding, C., Luo, Z., & Zhang, Z. (2017). Heat transfer performance of epoxy resin flows in a horizontal twisted tube. Applied Thermal Engineering, 127, 28–34. https://doi.org/10.1016/j.applthermaleng.2017.08.013.
Uwagi
PL
Opracowanie rekordu ze środków MNiSW, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2024).
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
bwmeta1.element.baztech-9a701e64-4d2e-4520-8ccf-97a97ce1e267