The heating of viscous petroleum products in a microwave field has been analytically investigated. The practical value of the work is related to the need to heat high-viscosity petroleum products when draining from railway tanks. It has been determined that the use of microwave radiation is one of the most promising areas in the creation of energy-saving and environmentally friendly technologies. The use of microwave energy instead of the currently used in most industrial installations of coolants can greatly simplify the technological scheme, eliminating all processes and devices associated with the preparation of the coolant. A modern area of application of microwave heating is the heating of high-viscosity oils and petroleum products, which significantly reduces viscosity. Currently, the disadvantage of this method is uneven heating. As a result, there is a need for a rational scheme solution for the supply of microwave energy and appropriate mathematical models for calculating the temperature of the petroleum product. An analytical study of the heating process in the approximation of a spherical body with continuously operating internal heat sources arising from the action of a microwave field has been carried out. The boundary conditions of the first kind and the assumption of invariance of thermophysical properties of the liquid are accepted. An algorithm for solving differential equations by the grid method when replacing differential operators with difference relations is presented. According to the recurrent formula for the three-dimensional thermal conductivity problem, the temperature field in non-stationary heating calculations have been performed. In the simulation of petroleum products’ microwave heating under this scheme, the distance from the microwave emitter to the drain hole has been determined based on the microwave energy penetration depth calculation. Thermophysical characteristics for fuel oil were taken into account during the calculations. It is determined that using microwave energy can significantly intensify the process and reduce energy costs for heating
Received 16.11.2021
Revised 22.02.2022
Accepted 23.05.2022
[1] Temperature Field Distribution Analysis for Cargo Oil / W. Wenfeng, Z. Jiakuo, L. Jinshu, G. Jialin, S. Fan, D. Jiajia, W. Dongze. Thermal science. 2020. Vol. 24, No. 5B. Рp. 3413-3421.
[2] Microwave treatment in oil refining / A. Porch, D.Slocombe, J.Beutler, P. Edwards, V.Kuznetsov. Appl Petrochem Res. 2012. Vol.2. Рp. 37–44.
[3] Z. H. Jin. Research on Heating and Heat Preservation Process of Tanker Cargo based on fluent Platform. Dalian Maritime University. 2006. Рp. 42-46.
[4] S. Akagi, H. Kato. Numerical Analysis of Mixed Convection Heat Transfer of a High Viscosity Fluid in a Rectangular Tank with Rolling Motion.International Journal of Heat and Mass Transfer.1987.Vol. 30,No. 11. Рp. 2423-2432.
[5] S.Wei. Numerical Simulation of Steam Coil Heating Process for Large Floating Roof Oil Tank. Chemical Engineering. 2016. No. 7. Рp. 19-23.
[6] M.Macagnan. Natural-Convection in a Tank of Oil: Experimental Validation of a Numerical Code with Prescribed Boundary Condition. Experimental Thermal and Fluid Science. 2005.Vol. 29,No. 6. Рp. 671-80.
[7] W. P. Hu. Heat Transfer and Fluidity of Highly Viscous and Solid Crude-Oil in Shipwreck Tanks.Ph. D. thesis, Dalian Maritime University, Dalian, China. 2015. 182 р.
[8] X.Zhu et al. Numerical Simulation of Flow Characteristics during Oil Tanker Cargo Heating, Journal of Zhejiang Ocean University (Natural Science). 2018. Vol. 37, No. 1. Pp. 55- 59.
[9] R. P. Yan et al. Research Progress of Industrial Microwave Sterilization Technology in the Field of Food Processing. Science and Technology of Food Industry. (2018), Vol. 39 No. 8. Pp. 302308.
[10] C. S. Fang, P. Lai. Microwave-Heating and Separation of Water-in-Oil Emulsions. Microwave Power Electromagnetic Energy. 1995. Vol. 30, No. 1. Pp. 46-57.
[11] R. J. Davidson. Electromagnetic stimulation of Lloydminster heavy oil reservoirs: field test results. Journal of Canadian Petroleum Technology. 1995. Vol. 34, No. 4. Pp. 15–24.
[12] A. Mukhametshina, E. Martynova. Electromagnetic Heating of Heavy Oil and Bitumen: A Review of Experimental Studies and Field. Applications Journal of Petroleum Engineering. 2013. 7 p.
[13] Domnin I.F., Rezinkina M.M. Raschetnoe issledovanie teplovyih protsessov pri vyisokochastotnom nagreve nefteproduktov. VIsnik NTU “HPI”. 2013. No 33. p. 51-55.[in Russian]
[14] Vasilev E., Morozov O., Stepanov, Tsyibko V. SVCh-razogrev zagustevshih nefteproduktov v zheleznodorozhnyih tsisternah. Elektronika dlya TEK. 1999. No 6. 9 c. [in Russian]
[15] Lyikov A. V. Teoriya teploprovodnosti. M.: Vyisshaya shkola. 1967. 600 р.
[16] J. Tang, F. Hao, M. Lau.Microwave Heating in Food Processing.Advances in Bioprocessing Engineering.Advances in Agricultural Science & Technology: Volume 1. World Scientific. 2002. Pp.1-44.
[17] Afanastev B. F.. Ustroystvo dlya nagreva zagustevshih i zastyivshih nefteproduktov v zheleznodorozhnyih tsisternah. Patent RU 2 224 387C2 ot 11.14.2001. [in Russian]
[18] Boshkova I. L., Volgusheva N. V., TItlov O.S., Altman E. I., MukmInov I. I.. DoslIdzhennya efektivnostI zastosuvannya mIkrohvilovogo nagrIvannyau naftoproduktIv. Holodilna tehnIka ta tehnologIya. 2021. No57 (2). P. 101-108.
[19] Bodnarchuk D. A.. Ustroystvo dlya razogreva i sliva vyisokovyazkih nefteproduktov iz tsisternyi. Patent RU2 538 657C2 ot 07.12.2012.
[20] A. Sahni, M. Kumar, R.B. Knapp. Electromagnetic heating methods for heavy oil reservoirs // Proc. of Society of Petroleum Engineers SPE/AAPG. Western Regional Meeting, Long Beach (CA) 62550. 2000. 12 p.