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Journal on Processing and Energy in Agriculture
2010, vol. 14, iss. 4, pp. 186-190
article language: English
document type: Original Scientific Paper
published on: 01/02/2011
Determination of sucrose solution viscosity on evaporator by Hagen-Poiseuille equation
aUniversity of Novi Sad, Faculty of Technical Science
bUniversity of Novi Sad, Faculty of Agriculture

e-mail: bika@uns.ac.rs

Project

Projekat Ministarstva nauke Republike Srbije, br. 20065: The quality of dried fruit production

Abstract

In this paper continuous measuring of viscosity of sucrose solution on the evaporator is analyzed. The aim was to consider the possibilities of applying Hagen-Poiseuille equations on the existing straight section of the pipeline of the evaporator. Experimental testing was conducted in real conditions on the existing evaporator. The aim was to calibrate the measuring system, and to obtain a mathematical model (dependence of the conversion factor K, the concentration of sugar in sucrose C, temperature of the solution t and hydraulic parameter of measurement system Δp/Q. The obtained mathematical model is validated with literature data. It was found that for each pair of values of sugar concentration in sucrose solution C and solution temperature t, at a given value of hydraulic parameter Δp/Q>(Δp/Q)lim, the difference between the measurement data and the data obtained by the mathematical model was negligible. Since the flow of the evaporator is regulated, it is possible to adjust the hydraulic parameter of measurement system Δp/Q. In this way, it was confirmed that the proposed technical solution can be successfully and reliably used for continuous measurement of viscosity of sucrose solutions. Compared to the conventional capillary viscometer, the proposed technical solution is much cheaper. Like with the capillary viscometer, space is still needed to accommodate the measuring system. The proposed technical solution of the measurement system requires a long process of calibration on the evaporator in the real terms.

Keywords

References

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