Construcción de una máquina enfriadora de leche para pequeños productores de la parroquia de Lloa

Abstract

In this project, a prototype of a small refrigeration system is developed for small farmers of Lloa and will work as a teaching instrument for students of the Electromechanical Technology degree of EPN. It was built using recycled elements verifying the status of each one. the cold store and the refrigeration system were designed, the thermal load was 0.7181 kW, where load for transmission of walls, load of the product, for air infiltration and a safety factor were analyzed. Subsequently, the refrigeration cycle was studied, a 1/8 [HP] compressor should be used, and it was necessary to analyze the replacement of refrigerant R-413A instead of R-12. Tests were performed with the empty cold store and with milk, fulfilling the objective of preserving milk at 3 [°C]. The system takes approximately 3 hours to cool the milk from 26 [°C] to 3 [°C], when the temperature sensor was directly in the milk. When the system is working, the condensation pressure was 200 [PSI] and the evaporation pressure was 22 [PSI], which verifies that the system is functioning properly.