A method for evaluating the efficiency of convective dryers from the viewpoint of heat consumption has been proposed; the method is based on a comparison of the characteristics of the dryers to a standard: the process with an efficiency maximum possible under given conditions. The so-called equilibrium analysis assuming the absence of the internal heat and moisture gradients in the dried product is used. It has been shown that gradient-free processes limiting for all modes of phase contact with decrease in the drying intensity to zero possess the highest intensity. The basic rules of organization of economical drying have been formulated.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
M. A. Grishin, V. I. Atanazevich, and Yu. G. Semenov, Installations for Drying Foodstuffs: Handbook [in Russian], Agropromizdat, Moscow (1989).
V. F. Frolov, Modeling of Drying of Dispersed Materials [in Russian], Khimiya, Leningrad (1987).
M. Yu. Lur’e, Drying [in Russian], Énergoizdat, Moscow (1948).
P. D. Lebedev, Calculation and Construction of Dryers [in Russian], Gosénergoizdat, Moscow (1963).
N. E. Fedorov, Analytical Calculations of Dryers [in Russian], Pishchevaya Promyshlennost’, Moscow (1967).
P. D. Lebedev, Heat Exchangers, Dryers, and Coolers [in Russian], Énergiya, Moscow (1972).
A. S. Ginzburg, Principles of the Theory and Technology of Drying Foodstuffs [in Russian], Pishchevaya Promyshlennost’, Moscow (1973).
M. V. Lykov, Drying in Chemical Industry [in Russian], Khimiya, Moscow (1976).
P. G. Romankov and N. B. Rashkovskaya, Suspended-State Drying [in Russian], Khimiya, Moscow (1979).
A. N. Planovskii, V. I. Mushtaev, and V. M. Ul’yanov, Drying of Dispersed Materials in the Chemical Industry [in Russian], Khimiya, Moscow (1979).
A. E. Baum and V. A. Rezchikov, Drying of Grain [in Russian], Kolos, Moscow (1983).
B. S. Sazhin, Principles of the Technology of Drying [in Russian], Khimiya, Moscow (1984).
A. S. Ginzburg, Calculation and Design of Dryers Installations of Food Industry [in Russian], Agropromizdat, Moscow (1985).
K. F. Pavlov, P. G. Romankov, and A. A. Noskov, Examples and Problems on the Course of Studying the Processes and Apparatus of Chemical Technology [in Russian], Khimiya, Leningrad (1987).
M. M. Razin, Specific features of the processes of drying and evaporation in the absence of an analogy between external heat and mass transfer, Inzh.-Fiz. Zh., 79, No. 2, 62–68 (2006).
O. Krischer, Die Wissenschaftlichen Grundlagen der Trocknungstechnik [Russian translation], IL, Moscow (1961).
S. P. Rudobashta, Mass Transfer in Systems with a Solid Phase [in Russian], Khimiya, Moscow (1980).
P. G. Romankov, N. B. Rashkovskaya, and V. F. Frolov, Mass Transfer Processes of Chemical Technology [in Russian], Khimiya, Moscow (1975).
Author information
Authors and Affiliations
Corresponding author
Additional information
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 81, No. 5, pp. 963–970, September–October, 2008.
Rights and permissions
About this article
Cite this article
Razin, M.M. Efficiency of utilization of heat in the processes of convective drying and an equilibrium analysis. J Eng Phys Thermophy 81, 1006–1014 (2008). https://doi.org/10.1007/s10891-009-0110-3
Received:
Revised:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10891-009-0110-3