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Experimental Investigation of Drying Behavior of Rosehip in a Cyclone-Type Dryer

Authors: Ayse Bicer, Filiz Kar


This paper describes an experimental investigation of the drying behavior and conditions of rosehip in a convective cyclone-type dryer. Drying experiments were conducted at air inlet temperatures of 50, 60 and 70 o C and air velocities of 0.5, 1 and 1.5 ms–1. The parametric values obtained from the experiments were fitted to the Newton mathematical models. Consequently, the drying model developed by Newton model showed good agreement with the data obtained from the experiments. Concluding, it was obtained that; (i) the temperature is the major effect on the drying process, (ii) air velocity has low effect on the drying of rosehip, (iii) the C-vitamin is observed to change according to the temperature, moisture, drying time and flow types. The changing ratio is found to be in the range of 0.70-0.74.

Keywords: Food Quality, Drying, rosehip

Digital Object Identifier (DOI):

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[1] E.K.Akpinar, The development of a cyclone type dryer for agricultural products, Ph D thesis, Firat University, Elazig Turkey, 2002.
[2] K.,Buvanasundaram, N., Mukai, T., Tsukada, M., Hozawa, M., Experimental and theoretical studies on drying of food materials. Journal of Chemical Engineering of Japan, 29, 1. 1996.
[3] S., Erent├╝rk, M..,S.,Gulapoglu, S..,G├╝ltekin, Experimental determination of effective moisture diffusivities of whole and cut rosehips in convective drying, Food and Bioproducts processing, 88, 99-104, 2010.
[4] L.,Stralsjo, C., Alklint, M.E.,Olsson. and I.,Sjoholm, Total foliate content and retention in rosehip after drying, Journal of Agricultural food Chemistry, 51, 4291-4295,2003
[5] F.,Demir, M., Ozcan, Chemical and technological properties of rose (Rosa canina L.) fruits grown wild in Turkey". Journal of Food Engineering, 47, 333-336, 2001.
[6] S., Erent├╝rk, M..,S.,Gulapoglu, S..,G├╝ltekin,The thin-layer drying characteristics of rosehip. Biosystems Engineering, 89, 159-166, 2004.
[7] Sarsavadia, Sawhney, Pangavhane and Sing, Drying behavior of brined onion slices. Journal of Food Engineering, 40, 219-226, 1999.
[8] Yald─▒z, Ertekin and Uzun, Thin layer solar drying of some vegetables, Drying Technology, 19, 583- 596, 2001
[9] A., Midilli, Determination of pistachio drying behavior and condition in a solar drying system. International Journal of Energy Research, 25, 715- 725, 2001
[10] url: (date: 09 February 2011)
[11] S., Erent├╝rk, M..,S.,Gulapoglu, S..,G├╝ltekin, The effects of cutting and drying medium on the vitamin C content of rosehip during drying, Journal of Food Engineering, 68, 513-518, 2005.