PERFORMANCE EVALUATION OF A LABORATORY SCALE SPRAY DRYER | ||||
| Misr Journal of Agricultural Engineering | ||||
| Article 21, Volume 27, Issue 1, January 2010, Page 326-346 PDF (602.83 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/mjae.2010.107172 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| A. H. Bahnasawy1; A. E. Okasha2; E. E. Gonbeej3 | ||||
| 1Associate Professor of Agric. Eng. Moshtohor, Benha University, Egypt. | ||||
| 2Professor of Food Science and Technology, Fac. of Eng. and Technol. Sci., Sebha University, Libya. | ||||
| 3Graduate student of Food Science and Technology, Fac. of Eng. and Technol. Sci., Sebha University, Libya | ||||
| Abstract | ||||
| A laboratory scale-spray dryer performance was evaluated experimentally. Powder yield, drying rate, feeding rate, drying time, evaporation rate and energy consumption were investigated under different inlet air temperatures and atomization speeds for drying some milk-juice blends and whole milk. Theoretical approach of the dryer was developed, and energy inputs and outputs were estimated at the same experimental conditions. The results showed that the powder yield decreased with increasing both inlet air temperature and atomization speed, on the other hand, drying rate and time, feeding rate, evaporation rate increased with increasing both air temperature and atomization speed. Energy consumption decreased with increasing both air temperature and atomization speed, where, it ranged from 36.47 to 53.29 GJ/kg for the milk-juice blends depending on both atomization speed and drying temperature, while it ranged from 38.53 to 45.70 GJ/kg for the whole milk. Dryer efficiency increased with increasing drying temperature and atomization speed. It ranged from 42.09 to 71.03% depending on drying temperature and atomization speed. Theoretical approach showed that the estimated energy consumption was lower than the actual energy consumed, also, the estimated energy inputs were higher by 4.28 to 5.59% than the outputs of energy. | ||||
| Keywords | ||||
| Spray dryer; performance; energy consumption; dryer efficiency; milk-juice blends; temperature; atomization; powder | ||||
| References | ||||
|
Baker, C. G. J and K.A. McKenzie. 2002. Energy consumption of industrial spray dryers. Drying’ 2002-Proceedings of the 13th International Drying Symposium (IDS’ 2002) Beijing, China, 27-30 August’ 2002, vol. A, pp. 645.
Bimbenet, J., Schuck, P., Roignant, M., Brul, G., and S. Mejan. 2002. Heat balance of a multistage spray-dryer: principles and example of application. Lait 82 (2002): 541–551
Birchal, V.S., Huang, L., Mujumdar, A.S., and Passos, M.L., 2006. Spray dryers: modeling and simulation. Drying Technology 24 (3), 359–371.
Deis, R.C. 1997. Spray-drying - innovative use of an old process. Food-Product-Design. 1997, 7(2): 97-98, 100, 103-104, 107, 109, 111-113.
Goula, A. M. and K. G. Adamopoulos .2003. Spray Drying Performance of a Laboratory Spray Dryer for Tomato Powder Preparation Drying Technology, 21 (7): 1273 - 1289 .
Hanus, M.J., and Langrish, T.A.G., 2007. Re-entrainment of wall deposits from a laboratory-scale spray dryer. Asia-Paci. Journal of Chemical Engineering 2 (2), 90–107.
Huang, L., Kumar, K., and Mujumdar, A.S., 2003a. A parametric study of the gas flow patterns and drying performance of co-current spray dryer: results of a computational fluid dynamics study. Drying Technology 21 (7), 957–978.
Huang, L., Kumar, K., and Mujumdar, A.S., 2003b. Use of computational fluid dynamics to evaluate alternative spray chamber configurations. Drying Technology 21 (3), 385–412.
Huang, L.X., Kumar, K., and Mujumdar, A.S., 2004. Simulation of a spray dryer fitted with a rotary disk atomizer using a three dimensional computational fluid dynamic model. Drying Technology 22 (6), 1489–1515.
Kessler H.G., 1981. Food engineering and dairy technology, Verlag A. Kessler, Freising, Germany, 1981.
Kota, K. and Langrish, T.A.G., 2007a. Assessing the deposition of a water spray on a plate in a simple box configuration using computational fluid dynamics (CFD). Chemical Product and Process Modelling 2 (3), 1–15. Available from: http://www.bepress.com/ijfe/vol2/iss3/16.
Kota, K and Langrish, T.A.G., 2007b. Prediction of deposition patterns in a pilot-scale spray dryer using computational .uid dynamics (CFD) simulations. Chemical Product and Process Modelling 2 (3), 26–41. Available from: http:// www.bepress.com/ijfe/vol2/iss3/26
Langrish, T. 2009. Multi-scale mathematical modelling of spray dryers. Journal of Food Engineering , 93:218–228
Ozmen L. and T. A. G. Langrish. .2003a. A Study of the Limitations to Spray Dryer Outlet Performance. Drying technology, vol. 21, No. 5, pp. 895–917.
Ramaswamy, H. and M. Marcotte, 2006. Food processing, principles and applications, Taylor & Francis Group, LLC, pages, 300-301.
Rane, M. V. ,S.V. Kota Reddy , and R. R. Easow. (2005) Energy efficient liquid desiccant-based dryer. Applied Thermal Engineering 25 (2005) 769–781.
Rao, RH and Kumar, A.H. 2005. Spray drying of mango juice-Buttermilk blends. Lait, 85, (4-5): 395-404.
Truong, V., Bhandari, B.R., and Howes, T., 2005. Optimization of co-current spray drying process of sugar-rich foods. Part I – Moisture and glass transition temperature profile during drying. Journal of Food Engineering 71 (1), 55–65. | ||||
|
Statistics Article View: 315 PDF Download: 279 |
||||
