Artigo
Non-newtonian flow and pressure drop of pineapple juice in a plate heat exchanger
Fecha
2010-12-01Registro en:
Brazilian Journal of Chemical Engineering. Brazilian Society of Chemical Engineering, v. 27, n. 4, p. 563-571, 2010.
0104-6632
10.1590/S0104-66322010000400008
S0104-66322010000400008
WOS:000286106200008
S0104-66322010000400008.pdf
9457081088108168
0000-0002-2553-4629
Autor
Universidade Estadual Paulista (Unesp)
Universidade de São Paulo (USP)
Resumen
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.