Method and Program to Calculate Heat and Mass Transfer Processes During Adsorption Drying of Compressed Air
https://doi.org/10.24108/aplts.0317.0000062
Abstract
With development of compressed air drying equipment, the task of numerical modeling of dynamic sorption-regeneration processes is increasingly emerging at the design stage. The dynamic problem has no analytical solution and can be solved only by numerical methods.
The paper presents a numerical method and a program developed to calculate dynamics of heat and mass transfer during adsorption drying of compressed air.
As a basis, a simplified physical model of sorption kinetics is used which assumes that inside the granules of the adsorbent there is a complete equalization of parameters such as temperature and moisture content at any time. The parameters of thermal conductivity and diffusion inside the adsorbent granules are incomparably higher than similar parameters on the surface of granules.
Based on the thermodynamic approach, a physical and a mathematical model of adsorption have been developed to calculate dynamic non-isothermal processes in adsorption drying apparatuses. The presented results of calculations confirm the possibility to analyze dynamics of heat and mass transfer processes in the dryer column in the moisture adsorption mode under various initial and boundary conditions, including those that vary within the drying cycle.
About the Authors
V. V. Kozlov
Bauman Moscow State Technical University, Moscow
Russian Federation
Russian Federation
Vladimir Vladimirovich Kozlov
candidate of technical Sciences, associate Professor of "Vacuum and compressor technology"
V. S. Shadrin
Bauman Moscow State Technical University, Moscow
Russian Federation
Russian Federation
Vladislav Sergeevich Shadrin
postgraduate student of the Department of "Vacuum and compressor technology"
M. A. Rahmanov
Bauman Moscow State Technical University, Moscow
Russian Federation
Russian Federation
Mihail Alekseevich Rahmanov
master of the Department "Vacuum and compressor technology"
References
1. Kel’tsev N.V. Osnovy adsorbtsionnoj tekhniki [Principles of adsorption technology]. 2nd ed. Moscow: Khimiia Publ., 1984. 591 p. (in Russian).
2. Serpionova E.N. Promyshlennaia adsorbtsiia gazov i parov [Industrial adsorption of gases and vapors]: a textbook. [2nd ed.]. Moscow: Vysshaia Shkola Publ., 1969. 414 p. (in Russian).
3. Mozgovoj S.V. Issledovanie protsessov teplo- i massoobmena pri ochistke gazovykh smesej v adsorbtsionnykh ustanovkakh [Research of processes of heat and mass transfer in the purification of gas mixtures in adsorption installations. Cand. diss.]. Moscow, 2001. 133 p. (in Russian).
4. Matvejkin V.G., Putin S.B., Skvortsov S.A., Tolstoshein S.S. Mathematical modeling of the process of adsorption concentration of carbon dioxide in the life support system of conditionally closed volume. Voprosy sovremennoj nauki i praktiki [Questions of Modern Science and Practice], 2011, no. 3(34), pp. 64-71 (in Russian).
5. Kheifets L.I., Predtechenskaia D.M., Pavlov Yu.V., Okunev B.N. Simulation of dynamic effects in adsorbent beds. 1. Simple method for estimating heat conductivity of composite water adsorbent bed (CaCl2 impregnated into pores of silica gel matrix). Moscow Univ. Chemistry Bulletin, 2006, vol. 61, no.4, pp. 31-35.
6. Kozlov V.V. Povyshenie effektivnosti osushki vozdukha v sistemakh termostatirovaniia [Improving the efficiency of the drying air temperature control systems. Abstract]. Moscow: MVTU Publ., 1988 (in Russian).
7. Weininger J.L., Schneider W.G. Thermal conductivity of granular beds filled with compressed gases. Industrial and Engineering Chemistry, 1951, vol. 43, no. 5, pp. 1229–1233. DOI: 10.1021/ie50497a061
8. Dubinin M.M. Fiziko-khimicheskie osnovy sorbtsionnoj tekhniki [Physico-chemical bases of sorption technology]. Moscow; Leningrad: Goskhimtekhnizdat Publ., 1932. 381 p. (in Russian).
9. Santos J.C., Portugal A.F., Magalhães F.D., Mendes A. Simulation and optimization of small oxygen pressure swing adsorption units. Industrial & Engineering Chemistry Research, 2004, vol. 43, no. 26, pp. 8328-8338. DOI: 10.1021/ie049701I
10. Zhang X.J., Sumathy K., Dai Y.J., Wang R.Z. Parametric study on the silica gel-calcium chloride composite desiccant rotary wheel employing fractal BET adsorption isotherm. Intern. J. of Energy Research, 2005, vol. 29, no. 1, pp. 37-51. DOI: 10.1002/er.1035
11. Vetoshkin A.G. Protsessy i apparaty gazoochistki [Processes and equipment for gas cleaning]: a textbook. Penza: Penza State Univ. Publ., 2006. 228 p. (in Russian).
12. Bobrovskij S.I. Delphi 7: uchebnyj kurs [Delphi 7: Learning course]. Moscow; S.Petersburg: Piter Publ., 2003. 735 p. (in Russian).
13.
Review
For citations:
Kozlov V.V., Shadrin V.S., Rahmanov M.A. Method and Program to Calculate Heat and Mass Transfer Processes During Adsorption Drying of Compressed Air. Machines and Plants: Design and Exploiting. 2017;(3):46-54. (In Russ.) https://doi.org/10.24108/aplts.0317.0000062
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