KATILARDA TEK BOYUTLU KURUTMA HESAPLAMALARINDA µ1 ve BIOT SAYISININ BELİRLENMESİ İÇİN KULLANILAN BASİTLEŞTİRİLMİŞ DENKLEMLERİN DEĞERLENDİRİLMESİ

Coskan Ilıcalı; Filiz Icıer

ASSESSMENT OF THE SIMPLIFIED EQUATIONS USED FOR THE DETERMINATION OF µ1 AND BIOT NUMBER IN UNIDIRECTIONAL DRYING CALCULATIONS IN SOLIDS

Year 2016, Volume: 6 Issue: 1, 7 - 18, 01.06.2016

Abstract

The accuracy of the two simplified methods; Dincer and Dost (1996) and Dincer and Hussain (2004), used for the determination of the first root of the characteristic equation and the Biot numbers from experimental lag factor data in unidirectional drying of solids has been investigated. The tabulated values relating the lag factor to the first root of the characteristic equation and Biot number were taken as basis in the assessment. None of the methods considered yielded accurate predictions for the complete lag factor range. The calculation of μ1 and Biot number from the tabulated values of lag factors has been recommended.

Keywords

Biot, mass coefficient, drying, food

References

Dincer I, Dost SA, modeling study for moisture diffusivities and moisture transfer coefficients in drying of solid objects, Int J Energy Research 20 (1996) 531-539.
Cengel Y, Heat Transfer a Practical Approach. (Second Edition, p. 219), McGraw-Hill Higher Education, New York (2003).
Ilicali C, Icier, F, Modified Dincer method for predicting the mass transfer coefficients in solids, Int J Food Eng DOI: 10.1515/ijfe-2015-0095 (2015).
Dincer, I, Moisture Loss from Wood Products During Drying—Part I: Moisture Diffusivities and Moisture Transfer Coefficients, Energy Sources 20(1) (1998) 67-75.
McMinn WAM, Kraisheh MAM, Magee, TRA, Modelling the mass transfer during convective, microwave, and microwave- convective drying of solid slabs and cylinders, Food Research Int 36 (2003) 977- 983.
Dincer I, Hussain MM, Development of a new Biot number and lag factor correlation for drying applications.
IntJ Heat Mass Transfer 47 (2004) 653-658.
McMinn WAM, Prediction of moisture transfer parameters for microwave drying of lactose powder using Bi- G drying correlation, Food Research Int 37 (2004) 1041-1047.
Jurendic T, Tripolo B, Biot number- lag factor (Bi- G) correlation for tunnel drying of baby food, African J Biotechnol 59(10) (2011) 12706-12713.
Liu X, Hou H, Chen J, Applicability of moisture transfer parameters estimated by correlation between Biot number and lag factor (Bi-G correlation) for convective drying of eggplant slices, Heat and Mass Transfer/Waerme- und Stoffuebertragung 49(11) (2013) 1595-1601.
Liu XA, Hou HB, Chen JA, Liu MA, Li ZA, Reliability of Bi-G model for experimental determination of mass transfer coefficient of biological materials, Nongye Jixie Xuebao/Transactions of the Chinese Society for Agricultural Machinery 45(6) (2014) 249-253.
Franks RGE, Modeling and Simulation in Chemical Engineering, Wiley- Interscience New York (1972).
Sawhney RL, Sarsavadia PN, Pangavhane D, Singh SP, Determination of drying constants and their dependence on drying air parameters for thin layer onion drying. Drying Technol 17(1- 2) (1999) 299- 315.
Akiyama T, Liu H, Hayakawa K, Hygrostress multicrack formation and propagation in cylindrical viscoelastic food undergoing heat and moisture transfer processes. Int J Heat Mass Transfer 40(7) (1997)1601- 1609.
Lu L, Tang J, Liang L, Moisture distribution in spherical foods in microwave drying, Drying Technol 16(3- 5) (1998) 503- 524.
Mrkic V, Ukrainczyk M, Tripalo B, Applicability of moisture transfer; Bi- Di correlation for convective drying of broccoli. J Food Eng 79 (2007) 640- 646.
Dincer I, Hussain MM, Development of a new Bi- Di correlation for solids drying. Int J Heat Mass Transfer 45 (2002) 3065- 3069.