Experimental determination of the heat transfer coefficients of shell-and-tube heat exchangers with different hollow fiber arrangements

Strunga, Alan; Kroulíková, Tereza; Bartuli, Erik; Raudenský, Miroslav

doi:10.1007/s10973-022-11576-1

Cited by 4 publications

(1 citation statement)

References 42 publications

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“…Refinement of methods for calculating heat transfer coefficients using experimental data in various equipment is a task to which many scientific works of scientists in different countries of the world are devoted [3][4][5][6][7][8][9][10]. But specifying the methods of calculating these coefficients for systems of drops or pellets and air, in their mutual movement, is a difficult task, the number of publications in this direction is limited, and similar studies are relevant.…”

Section: Introductionmentioning

confidence: 99%

Determination of the heat transfer coefficient between pellets and air during the modernization of a pelletizing tower based on industrial research

Nichvolodin,

Sklabinskyi

2023

TAPR

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The object of research is the heat transfer coefficient between pellets and air flow in industrial granulation towers. The problem lies in the difficulty of optimizing the heat transfer process. As a result of experiments and analysis, it was shown that each granulating tower for the production of mineral fertilizers has unique properties that significantly affect the efficiency of heat transfer. There are general mathematical models, but for accurate modeling and optimization of heat transfer, the unique characteristics of each production must be taken into account. The results showed that creating an accurate mathematical model for each specific fertilizer production is a difficult task due to the large number of unmeasured or difficult to reconcile factors. The method of calculating the heat transfer coefficient for the granulator tower obtained in the course of the work derives from a set of researches on the production of mineral fertilizers. This approach is based on the analysis of technical parameters and granulation composition of the product. The developed method makes it possible to reliably ensure the operating conditions of the device during modernization and changes in production volumes. These results are important for both practical and theoretical purposes. They can be used to accurately predict the operating conditions of equipment during modification and productivity growth. According to the research results, this approach allows obtaining fairly reliable data for forecasting the thermodynamic conditions of the tower equipment in the event of its modernization and transition of the granulation tower to the production of an increased amount of products. The specified method was tested in calculations of production modernization at urea production plants (Indian Farmers Fertilizer Cooperative (Iffco), India), Rustavi Azot LLC (Georgia), Grodno Azot LLC (Republic of Belarus) and others. This method has proven to be quite reliable in predicting the possible need for an additional amount of air supplied to the tower and forming requirements for the operating parameters of rotary vibrating granulators in the event of a significant increase in the load on the float in the tower and an increase in the amount of products planned for release.

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