Effect of air temperature and flow rate on energy consumption and drying rate of three paddy varieties in fluidized bed dryer

Document Type : Research Paper

Authors

1 M.sc graduated, Department of Mechanical Engineering of Biosystem, Faculty of Water and Soil, Gorgan University of Agricultural Sciences and Natural Resources.

2 Associate Professor/Department of Mechanical Engineering of Biosystem, Faculty of Water and Soil, Gorgan University of Agricultural Sciences and Natural Resources

3 Associate Professor, Rice Research Institute of Iran, Agricultural Research, Education and Extension Organization (AREEO), Rasht, Guilan, Iran

Abstract

With the development of modern drying paddy in addition to speed up the drying process, and in particular the amount of waste can be reduced to the minimum possible energy consumption. In this study was investigate the effect of input air temperature, input air flow rate and variety also their interaction on energy consumption and drying rate in the fluidized bed dryer. The parameters of input air temperature at 4 levels of 45, 50, 55 and 60 °C, the air flow rate at 3 levels of 0/12, 0/14 and 0/16 m3/s and variety of paddy at 3 levels Tarom, Fajr and Shirudi was considered and tests was done in three replication in form of a 3×3×4 the 3-factor factorial design. The results indicated that In all three varieties tested, by increasing the intake air temperature as well as reduced energy consumption, drying rate also increased significantly. At 45 and 50 ° C, increasing air flow grain drying had no significant effect on the rate  But at 55 and 60 ° C by increasing the flow rate of drying significantly increased. The results showed that by increasing air flow, increased energy consumption.

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Abdelmotaleb, A., El-Kholy, M. M., Abou-El-Hana, H. & Younis, M. A. (2009). Thin layer drying garlic slices using convection and (convection- infrared) heating modes. Journal of Agricultural Engineering, 29(1), 181-251
Akpinar, E., Midilii, A. & Bicer, Y. (2003). Single layer drying behavior of potato slices in a convective cyclone dryer and mathematical modeling. Energy Convection and Management, 44, 1689-1705.
Amer, B. M. A., Morcos, M. A. & Sabbah, M. A. (2003). New method for the determination of drying rates of fig fruits depending on empirical data under conditions suiting solar drying. The International Conference Institute of Agricultural Engineering, 18-19 Sep., LUA Raudondvaris, Lithuania.
Amiri Chayjan, R., Khoshtahaza, M. H. & Amiri Parian, J. (2009). Variables estimation and important order determination of effective factors in fixed bed drying of rough rice by using artificial neural networks. Journal of Food Technology Research, 19(1), 55-73. (In Farsi)
Aquerreta, J., Iguaz, A., Arroqui, C. & Virseda, P. (2007). Effect of high temperature drying and tempering on rough rice quality. Journal of Food Engineering, 80, 611-918.
ASAE (2000). ASAE Standard S352.2: moisture measurement-unground grain and seeds in ASAE standards 2000, St. Joseph, MI.
Bonazzi, C., Du Peuty, M. A. & Themelin, A. (1997). Influence of drying conditions on the processing quality of rough rice. Drying Technology, 3&4(15), 1141-1157.
Corzo, O., Bracho, N., Vasquez, A. & Pereira, A. (2008). Energy and exergy analyses of thin layer drying of coroba slices. Journal of Food Engineering, 86(2), 151-161.
Doymaz, I. (2004). Convective air drying characteristics of thin layer carrots. Journal of Food Engineering, 61, 359-364.
Fellows, P. (2000). Food processing technology: principles and practice. Second edition. Poblished by CRC press.
Feng, H. & Tang, J. (1998). Microwave finish drying of diced apples in a spouted bed. Journal of Food Science, 63, 238-251.
Hagh-Khah, A. & Maghsoudlou, E. (2006). Study of the paddy height on dryer and the effect of drying temperature on fracture grain of rice in Gorgan Shalikoubi. In: Proceedings of 16th National Congress of Iran Food Industry (1st Regional Congress), 12-13 Apr., Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran. (In Farsi)
Jia, C. C., Sun, D. W. & Cao, C. W. (2000). Mathematical simulation of stresses within a corn kernel during drying. Drying Technology, 18, 887-906.
Karim, M. A. & Hawlader, M. N. A. (2005). Drying characteristics of banana: theoretical modelling and experimental validation. Journal of Food Engineering, 70, 35-45.
Khoshtaqaza, M. H., Sadeghi, M. & Amiri-Chayjan, R. (2007). Study the rough rice drying process in fixed and fluidized bed conditions. Journal of Agriculture Science and Natural Research, 14(2), 127-136. (In Farsi)
Kunii, D. & Levenspiel, O. (1991). Fluidization Engineering. New York: Butterworth Heinemann, USA.
Malekjani, N. (2011). Design and modeling of a laboratory scale fluidized bed canola dryer and evaluation of oilseeds quality attributes. M. Sc. thesis. Faculty of Food Science and Technology, Gorgan University of Agricultural Sciences and Natural Resources. Gorgan, Iran. (In Farsi)
Mc Cabe, L. W., Smith, J. C. & Harriot, P. (1988). Unit Operation of Chemical Engineering. New York: Mc Grow Hill Book Company, USA.
Mohajeran, S. H., Khoshtaghaza, M. H. & Moazami Gudarzi, A. (2004). Effect of temperature and air velocity on cracking of seed paddy In drying by infrared radiation. Journal of Food Industry, 2, 57-65. (In Farsi)
Omid, M., Yadollahinia, A. & Rafie, SH. (2010). Extraction kinetics model Drying of paddy of Fajr variety in The thin layer dryer. Iranian Journal of Biosystems Engineering, 41(2), 153-160. (In Farsi)
Pangavhane, D. R., Sawhney, R. L. & Sarvahandia, P. N. (1999). Effect of various dipping pretreatment on drying kinetics of Thompson Seedless Grapes. Journal of Food Engineering, 39, 211-216.
Pangavhane, D. R. Sawhney, R. L. & Sarsavadia, L. (2002). Design, development and performance testing of a new natural convection solar dryer. Energy, 27, 579-590.
Prasad, B. V. S., Chandra. P. K. & Bal, S. (1994). Drying parboiled rough rice in stationary, semi-fluidized and fluidized conditions. Transactions of The ASAE, 37(2), 589-594.
Rostami, M. A. & Mirdamadiha, F. (2003). Evaluation and comparison of pistachio common dryers in Kerman province. Journal of Agricultural Engineering, 18(5), 1-17. (In Farsi)
Sacilik, K., Keskin, R. &  Elicin, A. (2006).  Mathematical modeling of solar tunnel drying of thin layer organic tomato. Journal of Food Engineering, 73,  231-238.
Sharifi, M., Rafiee, SH., Keyhani, A. R. & Omid, M. (2010). Effects of drying conditions of sliced orange on energy consumption. Journal of Food Science and Technology, 7(3), 109-116. (In Farsi)
Soltani, A. (2007). Application of SAS software in statistical analysis. Jihad Daneshgahi Mashhad Press. (In Farsi)
Sun‚ Z. (1995). The mechanism of brown rice kernel cracking rate and rice broken rate. Transactions of The Chinese Society of Agricaltural Enginering‚ 11(3), 173–178.
Sutherland, J. W. & Gholy, T. F. (1990). Rapid fluid bed drying of paddy rice in the humid tropics. Proceedings of ASEAN Seminar on Post harvest Technology. Brunei Darussalam, 19-30.
Treybal, R. E. (1980). Mass transfer operations (3th ed.). Tokyo: Mc Graw-Hill International Book Co.
Uckan, G. & Ulku, S. (1986). Drying of grains in a batch fluidized bed dryer. In Drying of Solids-Recent International Developments, ed. Majumdar, A. S. New Dehli, India: Wiley Eastern Ltd.
Yaldiz, O., Ertekin, C. & Uzun, H. I. (2001). Mathematical modeling of thin layer drying of sultana grapes. Energy, 26, 457-465.
Zandi, M., Niakousari, M., Eskandari, M. H. & Sarshar, M. (2013). Design, construction and evaluation performance of spouted bed dryer. Journal of Food Science and Technology Research and innovation,  2(3), 243-252. (In Farsi)