Non-newtonian flow and pressure drop of pineapple juice in a plate heat exchanger

Brazilian Journal of Chemical Engineering

R. A. F. Cabral²  J. A. W. Gut¹  V. R. N. Telis²  J. Telis-romero² 

[1] ,Universidade Estadual Paulista Department of Food Engineering and Technology São José do Rio Preto SP ,Brazil

关键词: Food processing;    Heat exchanger;    Pressure drop;    Non-Newtonian;   

DOI  :  10.1590/S0104-66322010000400008

来源: SciELO

【 摘 要 】

The study of non-Newtonian flow in plate heat exchangers (PHEs) is of great importance for the food industry. The objective of this work was to study the pressure drop of pineapple juice in a PHE with 50º chevron plates. Density and flow properties of pineapple juice were determined and correlated with temperature (17.4 < T < 85.8ºC) and soluble solids content (11.0 < Xs < 52.4 ºBrix). The Ostwald-de Waele (power law) model described well the rheological behavior. The friction factor for non-isothermal flow of pineapple juice in the PHE was obtained for diagonal and parallel/side flow. Experimental results were well correlated with the generalized Reynolds number (20 < Re g < 1230) and were compared with predictions from equations from the literature. The mean absolute error for pressure drop prediction was 4% for the diagonal plate and 10% for the parallel plate.

【 授权许可】

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