Computational simulation of two-phase flow of an evaporator Roberts

Abstract

This research work was carried out with the aim of determining the behavior of the fields of velocities, temperatures and pressures of a system of two-phase of a Roberts evaporator. The computational simulation of A particle motion of A fluid in an environment of two-phases was used the CFX- ANSYS code which calculates the flow field by the Finite Volume Method. Also, the flow conditions both juice as steam inlet and outlet of an evaporator of 785 m2 Roberts of Industrial Pucalá in Chiclayo were registered. To validate the temperature field profile computationally simulated, experimental data were taken placing bulbs juice boiling temperature on the calandria of evaporator. Results obtained from computer simulation of the fields of velocity, temperature and pressure of cane juice of a Roberts evaporator showed that the velocity of the juice drops dramatically at the bottom and the evaporator calandria. Abundant juice recirculation occurs between the discharge line of juice and the recirculation center tube. Likewise, boiling fluid temperatures are higher in the middle of the height of the calendar, and its pressure decreases uniformly from the bottom to the body of the evaporator. Juice temperature values computationally simulated and measured experimentally shown to be in good agreement, validating the model developed.