Modelación matemática de tanques térmicos para el control de la temperatura de salida en el almacenamiento de leche de la industria láctea

Abstract

The aim of this work was to develop the mathematical modeling of the thermal tanks for milk storage at Tunshi Experimental Station of the Escuela Superior Politécnica de Chimborazo in the control of outlet temperature during cooling and heating process, quantitative microbiological data of the fluid at the point of collection as initial temperature of entry were taken, indicating a temperature of 19.6°C, the milk was processed at 8°C and it was heated up to 80°C, the process was modeled based on the energy balance and simulated by means of the Matlab program (Simulink) indicating the stable variables as operating conditions, with 875 liters in a vertical type tank in a total period of 4800 seconds, the modeling and its transfer function were simulated, responding in their dynamic and stable states in the established parameters. Three different curve behaviors were determined, these were: the energy balance of the thermal tank, its transfer function in milk heating and the curve behaviors in reception, cooling and heating up to of 80°C, the curve behaviors were experimentally verified, validating the established modeling of the two different processes. It is recommended, in future work, to consider a range of 4°C to 6°C for milk fluid cooling temperatures, ideal temperatures for preserving the fluid.