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Demissie Boset, Lemi, Abdi Debele, Zewdu, Wako Koroso, Amana. (1404). Experimental Investigation of Minimum Fluidization Velocity and Pressure Drop in Fluidized Bed of Teff Grain. هنرهای کاربردی, 12(2), 323-333. doi: 10.22075/jhmtr.2025.35810.1632
Lemi Demissie Boset; Zewdu Abdi Debele; Amana Wako Koroso. "Experimental Investigation of Minimum Fluidization Velocity and Pressure Drop in Fluidized Bed of Teff Grain". هنرهای کاربردی, 12, 2, 1404, 323-333. doi: 10.22075/jhmtr.2025.35810.1632
Demissie Boset, Lemi, Abdi Debele, Zewdu, Wako Koroso, Amana. (1404). 'Experimental Investigation of Minimum Fluidization Velocity and Pressure Drop in Fluidized Bed of Teff Grain', هنرهای کاربردی, 12(2), pp. 323-333. doi: 10.22075/jhmtr.2025.35810.1632
Demissie Boset, Lemi, Abdi Debele, Zewdu, Wako Koroso, Amana. Experimental Investigation of Minimum Fluidization Velocity and Pressure Drop in Fluidized Bed of Teff Grain. هنرهای کاربردی, 1404; 12(2): 323-333. doi: 10.22075/jhmtr.2025.35810.1632

Experimental Investigation of Minimum Fluidization Velocity and Pressure Drop in Fluidized Bed of Teff Grain

Journal of Heat and Mass Transfer Research
دوره 12، شماره 2 - شماره پیاپی 24، بهمن 2025، صفحه 323-333    اصل مقاله (778.29 K)
نوع مقاله: Full Length Research Article
شناسه دیجیتال (DOI): 10.22075/jhmtr.2025.35810.1632
نویسندگان
Lemi Demissie Boset* 1؛ Zewdu Abdi Debele2؛ Amana Wako Koroso1
1School of Mechanical, Chemical, and Material Engineering, Adama Science and Technology University, Adama, Oromia, 0000, Ethiopia
2Faculty of Agriculture, University of Eswatini, Luyengo, Eswatini, M205, Eswatini
تاریخ دریافت: 15 آبان 1403،  تاریخ بازنگری: 06 فروردین 1404،  تاریخ پذیرش: 07 اردیبهشت 1404 
چکیده
Gas-fluidization characteristics of teff grain are crucial for understanding its behavior under gas flow, enabling it to act like a fluid, which is vital for pneumatic conveying systems. Key parameters include the minimum fluidization velocity and the pressure drop across the fluidized bed, which reflect the interaction between gas and grains. These characteristics are essential for selecting the appropriate phase of the pneumatic conveying system, ultimately improving the processing and handling of teff grain. Air retention capabilities are significant indicators of a material's suitability for dense-phase conveying. Gas fluidized bed tests were performed to evaluate the bulk flow behavior of teff grain for both dilute and dense-phase pneumatic conveyors. Results indicated that teff grain has poor air retention, evidenced by bubble formation at low airflow rates, suggesting it is more suitable for dilute-phase conveying. Experiments measured the minimum fluidization air velocity and pressure drop per bed height using a CEL-MKII apparatus at various airflow rates. Experimental studies revealed that bubbles form in the fluidized bed at the minimum superficial gas velocity, with a pressure drop ranging between 100 mbar/m and 107 mbar/m and a minimum fluidization velocity of 0.56 m/s and 0.575 m/s. These findings guide the design of effective drying and pneumatic conveying systems for teff grain.
کلیدواژه‌ها
Minimum fluidization velocity؛ Pressure drop؛ Pneumatic conveyor؛ Drying؛ Teff grain
عنوان مقاله [English]
بررسی تجربی حداقل سرعت سیال شدن و افت فشار در بستر سیال دانه تف
چکیده [English]
ویژگی‌های سیال‌سازی گاز دانه تف برای درک رفتار آن در جریان گاز بسیار مهم است و آن را قادر می‌سازد مانند یک سیال عمل کند که برای سیستم‌های انتقال پنوماتیک حیاتی است. پارامترهای کلیدی عبارتند از حداقل سرعت سیال شدن و افت فشار در سراسر بستر سیال، که منعکس کننده تعامل بین گاز و دانه ها است. این ویژگی ها برای انتخاب فاز مناسب سیستم انتقال پنوماتیک و در نهایت بهبود پردازش و جابجایی دانه تف ضروری است. قابلیت های نگهداری هوا شاخص های قابل توجهی از مناسب بودن یک ماده برای انتقال فاز متراکم هستند. آزمایشات بستر سیال گاز برای ارزیابی رفتار جریان فله دانه تف برای هر دو نوار نقاله پنوماتیک فاز رقیق و متراکم انجام شد. نتایج نشان داد که دانه تف دارای احتباس هوای ضعیفی است، که با تشکیل حباب در نرخ‌های جریان هوا کم نشان می‌دهد، که نشان می‌دهد برای انتقال فاز رقیق مناسب‌تر است. آزمایش‌ها حداقل سرعت هوای سیال شدن و افت فشار را در هر ارتفاع بستر با استفاده از دستگاه CEL-MKII در نرخ‌های جریان هوای مختلف اندازه‌گیری کردند. برای رقم Boset (DZ-Cr-409) با محتوای رطوبت (9٪ -16%)، حداقل سرعت سیال شدن بین 0.57-0.62 متر بر ثانیه و افت فشار از 102.61-106.25 میلی‌بار بر متر متغیر بود، در حالی که برای رقم فلاگوت (DZ-Cr-442 RIL77C) با رطوبت (8%-14%)، مقادیر 0.53-0.57 m/s و 100.4-101.72 mbar/m. این یافته ها طراحی سیستم های خشک کن و انتقال پنوماتیک موثر برای دانه تف را راهنمایی می کند
کلیدواژه‌ها [English]
حداقل سرعت سیال شدن افت فشار, نوار نقاله پنوماتیک, خشک کردن, دانه تف
مراجع
  1. Abdissa, B., Math, R., Desham, K., and Korra, S., 2020. Moisture sorption behavior and shelf life prediction of teff seed and flour. Journal of Applied Packaging Research, 12(1), p. 1.
  2. Gonite, T. and Reda, H., 2018. Design and prototyping of teff (ጤፍ) row planter and fertilizer applier. International Journal of Mechanical Engineering and Applications, 6(4), p.91.
  3. Tiguh, E.E., Delele, M.A., Ali, A.N., Kidanemariam, G., and Fanta, S.W., 2024. Assessment of harvest and postharvest losses of teff (Eragrostistef (Zucc.)) and methods of loss reduction: A review. Heliyon, 10(9).
  4. Debebe, S. 2022. Post-harvest losses of crops and its determinants in Ethiopia: tobit model analysis. Agriculture & food security, 11(1), pp.1-8.
  5. Sen, K., Ghosh, S., and Sarkar, B., 2017. Comparison of customer preference for bulk material handling equipment through fuzzy-AHP approach. Journal of The Institution of Engineers (India): Series C, 98(3), pp.367-377.
  6. Karimi, M., Moradi, M., Niakousari, M., and Karparvarfard, S.H., 2022. Application of heat carrier particles in a fluidized bed dryer: Dimensionless modeling and GHG emissions. Journal of Food Process Engineering, 45(9), p.e14071.
  7. Pontawe, R.J., Asuncion, N.T., Villacorte, R.B., and Martinez, R.C., 2016. Pilot-scale fluidized bed drying system for complete drying of paddy. PHilMech Technical Bulletin, 6(1).
  8. Cheng, S., Skylas, D.J., Whiteway, C., Messina, V., and Langrish, T.A., 2023. The effects of fluidized bed drying, soaking, and microwaving on the phytic acid content, protein structure, and digestibility of dehulled faba beans. Processes, 11(12), p.3401.
  9. De Munck, M.J.A., Dullemond, M., Peters, E.A.J.F., and Kuipers, J.A.M., 2023. Experimental gas-fluidized bed drying study on the segregation and mixing dynamics for binary and ternary solids. Chemical Engineering Journal, 465, p.142756.
  10. Askarishahi, M., Salehi, M.S., and Radl, S., 2023. Challenges in the simulation of drying in fluid bed granulation. Processes, 11(2), p.569.
  11. Liu, Z., Du, B., Zhao, W., Li, X., Li, J., Bu, C., and Yi, H., 2009, February. Effect of characterization of powder on particle velocity in dense-phase pneumatic conveying. In Journal of Physics: Conference Series (Vol. 147, No. 1, p. 012068). IOP Publishing.
  12. Cheng, S., Skylas, D.J., Whiteway, C., Messina, V., and Langrish, T.A.G. 2023. The effects of fluidized bed drying, soaking, and microwaving on the phytic acid content, protein structure, and digestibility of dehulled faba beans. Processes, 11(12), doi: 10.3390/pr11123401.
  13. de Munck, M.J.A., Peters, E.A.J.F., and Kuipers, J.A.M. 2023. CFD-DEM fluidized bed drying study using a coarse-graining technique, Ind. Chem. Res., 62(48), pp. 20911–20920, doi: 10.1021/acs.iecr.3c02960.
  14. Alkassar, Y., Agarwal, V.K., Pandey, R.K., and Behera, N., 2021. Analysis of dense phase pneumatic conveying of fly ash using CFD including particle size distribution. Particulate Science and Technology, 39(3), pp.322-337.
  15. Lu, Y., Zhao, L., Han, Q., Wei, L., Zhang, X., Guo, L., and Wei, J., 2013. Minimum fluidization velocities for supercritical water fluidized bed within the range of 633–693 K and 23–27 MPa. International Journal of Multiphase Flow, 49, pp.78-82.
  16. Singh, R.K., Dhaigude, N.D., Sahu, A., Chauhan, V., Sahu, G., Saha, S., and Chavan, P.D., 2023. Significance of temperature and pressure on minimum fluidization velocity in a fluidized bed reactor: An experimental analysis. Energy Sources, Part A: Recovery, Utilization, and Environmental Effects, 45(1), pp.1793-1806.
  17. Yehuda, T. and Kalman, H. 2020. Geldart classification for wet particles. Powder Technology, 362, pp. 288–300, doi: 10.1016/j.powtec.2019.11.073.
  18. Tavares, R., Santana, Dias C., Rodrigues Moura, C.H., Rodrigues, E.C., Viegas, B., Macedo, E., and Estumano D.C., 2022. Parameter Estimation in Mass Balance Model Applied in Fixed Bed Adsorption Using the Markov Chain Monte Carlo Method. Journal of Heat and Mass Transfer Research, 9(2), pp.219-232.
  19. Ayawei, N., Ebelegi, A.N., and Wankasi, D., 2017. Modelling and interpretation of adsorption isotherms. Journal of Chemistry, 2017(1), p.3039817.
  20. Tavares, R.S., Dias, C.S., Moura, C.H.R., Rodrigues, E.C., Viegas, B., Macedo, E., and Estumano, D.C., (2022). Parameter estimation in mass balance model applied in fixed bed adsorption using the Markov chain Monte Carlo method. Journal of Heat and Mass Transfer Research, 9(2), pp. 219–232.
  21. Anantharaman, A., Cocco, R.A., and Chew, J.W., 2018. Evaluation of correlations for minimum fluidization velocity (Umf) in gas-solid fluidization. Powder technology, 323, pp.454-485.
  22. Hideo, I., Husain, S., Akihiko, H., and Naoto, H., 2007. Heat and mass transfer analysis of fluidized bed grain drying. Memoirs of the Faculty of Engineering, Okayama University, 41(1), pp.52-62.
  23. Dhillon, B., Wiesenborn, D., Dhillon, H., and Wolf‐Hall, C., 2010. Development and evaluation of a fluidized bed system for wheat grain disinfection. Journal of Food Science, 75(6), pp.E372-E378.
  24. Hideo, I., Husain, S., Akihiko, H., and Naoto, H., 2007. Heat and mass transfer analysis of fluidized bed grain drying. Memoirs of the Faculty of Engineering, Okayama University, 41(1), pp.52-62.
  25. Ali, M., Mahmud, T., Heggs, P.J., Ghadiri, M., Djurdjevic, D., Ahmadian, H., de Juan, L.M., Amador, C., and Bayly, A., 2014. A one-dimensional plug-flow model of a counter-current spray drying tower. Chemical Engineering Research and Design, 92(5), pp.826-841.
  26. Güner, M.E.T.I.N., 2007. Pneumatic conveying characteristics of some agricultural seeds. Journal of Food Engineering, 80(3), pp.904-913.
  27. Chan, Y., Dyah, T.N., and Kamaruddin, A., 2015. Solar dryer with pneumatic conveyor. Energy Procedia, 65, pp.378-385.
  28. Zewdu, A.D. and Solomon, W.K., 2007. Moisture-dependent physical properties of tef seed. Biosystems Engineering, 96(1), pp.57-63.
  29. Boset, L.D., Debele, Z.A., and Koroso, A.W., 2024. Pressure Drop Due to Cyclone Separator in Positive Dilute Phase Pneumatic Teff Grain Conveyor. Journal of Applied Fluid Mechanics, 18(2), pp.317-331.
  30. Tsegaye, G.A., and Abera, S., 2020. The study of some engineering properties of teff [Eragrostis teff (Zucc.) Trotter] grain varieties. International Journal of Food Engineering and Technology, 4(1), p.9.
  31. Li, G., Li, X.S., and Li, C., 2017. Measurement of permeability and verification of Kozeny-Carman equation using statistic method. Energy Procedia, 142, pp. 4104-4109.
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