Implementación de un módulo didáctico de un sistema de refrigeración con paneles intercambiables para el laboratorio de tecnología industrial de la ESFOT.

Abstract

In the present degree project, a didactic module of a cooling system with interchangeable panels in the chamber was implemented to analyze the difference of the thermal load while using different materials like steel sheet, wood and polystyrene in the walls.

For the chamber and cooling system designs, they were based on a 1/8 (hp) compressor and the cooling cycle analysis lead to find the evaporator heat which is 153.5 (W). In addition, the thermal load, which are wall loading, product loading, equipment loading, service loading and safety factor, was calculated. The total cooling load was determined with each of the different materials obtaining the thermal load highest when using the steel sheet, it is 63.83(W).

A rigid structure with steel angles was manufactured to support the cooling system and instrumentation. From the compressor characteristics, the refrigerant, condenser and evaporator were selected, the cooling system assembly was made with OAW welding.

Nitrogen pressurization was performed to correct leaks in the system, vacuum to extract air/humidity, both previous to the refrigerant filling. In addition, performance tests were carried out, analyzing the pressure, temperature and the compressor on/off time in one-hour variables while the equipment operated with each material. The shortest switched-on time was with polystyrene, it is 20:07 (min-sec).