Određivanje termofizičkih karakteristika jabuka primenom inverznog postupka
##plugins.themes.bootstrap3.article.main##
Apstrakt
Sve termofizičke karakteristike prehrambenih materijala osim dufuzivnosti mogu se relativno lako odrediti eksperimentalno. Osnovni problem određvanja difuzivnosti je merenje profila vlage u materijalu tokom procesa sušenja. U radu je analizirana mogućnost istovremenog određivanja difuzivnosti i ostalih termofizičkih karakteristika jabuka i koeficijenata konvektivnog prenosa toplote i materije, primenom inverznog postupka. Inverzni postupak se bazira na nalaženju minimuma funkcije kvadrata odstupanja izmerenih od proračunatih vrednosti temperatura listića jabuka tokom procesa sušenja. U tu svrhu primenjena je Levenberg-Marquardt-ova metoda. Za optimalno dizajniranje eksperimenta sprovedena je analiza relativnih temperaturskih koeficijenata osetljivosti i determinante osetljivosti.
##plugins.themes.bootstrap3.article.details##
Reference
[2] Kanevce, L. P., Kanevce, G. H., Dulikravich, G. S., Application of inverse concepts to drying, Thermal Science, 9 (2005), 2, pp. 31-44.
[3] Kanevce, G. H., Kanevce, L. P., Dulikravich, G. S., Orlande, H. R. B., Estimation of thermophysical properties of moist materials under different drying conditions, Inverse Problems in Science and Engineering, 13 (2005), 4, pp. 341-353.
[4] Mitrevski, V. B., Istražuvanje na procesite na sušenje so primena na inverznata postapka, Doktorska disertacija, Tehnički fakultet, Bitola, Makedonija, 2005.
[5] Kanevce, G. H., Kanevce, L. P., Mitrevski, V. B., Dulikravich, G. S., Orlande, H. R. B., Inverse approaches to drying of thin bodies with significant shrinkage effects, Journal of heat transfer, 129 (2007), pp. 379-386.
[6] Kanevce, G. H., Kanevce, Lj. P., Mitrevski, V. B., Matematički model sušenja tela sa promenom zapremine, Procesna tehnika, 20 (2004),2-3, pp.60-63.
[7] Mitrevski, V. B., Kanevce, G. H., Kanevce, L. P., Voronjec, D. K., Planiranje optimalnog eksperimenta za određivanje termofizičkih karakteristika prehrambenih materijala, Č. za procesnu tehniku i energetiku u poljoprivredi, 11 (2007), 1-2, pp. 1-5.
[8] Kanevce, G. H., Numerical study of drying, Proceedings, 11th International Drying Symposium, Halkidiki, Greece, August 19-22, 1998, Vol. A, pp. 256-263.
[9] Özisik, M. N., Orlande H. R. B., Inverse Heat Transfer: Fundamentals and Applications, Taylor and Francis, New York, 2000.
[10] Niesteruk, R., Changes at thermal properties of fruits and vegetables during drying, Drying Technology, 14 (1996), 2, pp. 415-422.
[11] Donsi, G., Ferrari, G., Nigro, R., Experimental determination of thermal conductivity of apple and potato of different moisture contents, Journal of Food Engineering, 30 (1996), pp. 263-268.
[12] Singh, P. C., Singh, R. K., Application of GAB model for water sorption isotherms of food products, Journal of Food Processing and Preservation, 20 (1996), pp. 203-220.
[13] Alzamora, S. M., Mass and heat transfer during air drying of avocado, Ph. D. thesis, University of Buenos Aires, Argentina, 1979.
[14] Feng, H., Tang, J., Cavalieri, J. P., Combined microvawe and spouted bed drying of diced apples: Effect of drying conditions on drying kinetics and product temperature, Drying Technology, 17 (1999), 10, pp. 1981-1998.
[15] Feng, H., Tang, J., Dixon-Warren, St. J., Determination of moisture diffusivity of red delicious apple tissues by thermogravimetric analysis, Drying Technology, 18 (2000), 6, pp. 1183-1199.
[16] Gekas, V., Transport phenomena of foods and biological materials, CRC Press, New York, 1992.
[17] Karathanos, V. T., Reppa, A., Kostaropoulus, A. E., saravacos, G. D., Air-drying kinetics of osmotically dehydrated fruits, Proceedings, 9th International Drying Symposium,
Gold Coast, Australia, August 1-4, 1994, Vol. B, pp. 871-878.
[18] Labuza, T. P., Simon, I. B., Surface tension effects during drying. 1. Air drying of apple slices, Food Technology 24 (1970), pp. 712-715.
[19] Lomauro, C. J., Bakshi, A. S., Labuza, T. P., Moisture transfer properties of dry and semimoist foods, Journal of Food Science, 50 (1985), pp. 397-400.
[20] Luyben, K. Ch. A. M., Olieman, J. J., Bruin, S., Concentration dependent diffusion coefficients derived from experimental drying curves, Proceedings, 2nd International Drying Symposium, Canada, 1980, Vol. 2, pp. 233-243.
[21] McCarthy, M. J., Perez, E., Ozligen, M., Model for transient moisture profiles of a drying apple slab using the data obtained with magnetic resonance imaging, Biotechnology Progress, 7 (1991), 6, pp. 540-543.
[22] Rotstein, J. E., Laura, P. A., De Cemborain, M. E., Analytical prediction of drying performance in non conventional shapes, J. of Food Science, 39 (1974), pp. 627-631.
[23] Saravacos, G. D., Charm, S. E., A study of the mechanism of fruit and vegetable dehydration, Food Technology, 16 (1962), pp. 78-81.
[24] Saravacos, G. D., Maroulis, Z. B., Transport Properties of Foods, Marcel Dekker Inc., New York, 2001.
[25] Sihgh, R. K., Lund, D. B., Buelow, F. H., An experimental technique using regular regime theory to determine moisture diffusivity, in: Engineering and Food (Ed. B.M. McKenna), Elsevier Applied Science, London, 1984, pp. 415-423.
[26] Zogzas, N. P., Maroulis, Z. B., Effective moisture diffusivity estimation from drying data, Drying Technology, 14 (1996), 7-8, pp. 1543-1573.
