Non-newtonian flow and pressure drop of pineapple juice in a plate heat exchanger
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Data
2010-12-01
Autores
Cabral, R. A. F. [UNESP]
Gut, J. A. W.
Telis, V. R. N. [UNESP]
Telis-Romero, J. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Brazilian Society of Chemical Engineering
Resumo
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.
Descrição
Palavras-chave
Food processing, Heat exchanger, Pressure drop, Non-Newtonian
Como citar
Brazilian Journal of Chemical Engineering. Brazilian Society of Chemical Engineering, v. 27, n. 4, p. 563-571, 2010.