Eventos Anais de eventos
ENCIT 2018
Brazilian Congress of Thermal Sciences and Engineering
A MODELICA MODEL TO SIMULATE DOMESTIC REFRIGERATION COMPRESSORS UNDER TRANSIENT CONDITIONS
Submission Author:
Teo Balconi , SC
Co-Authors:
Teo Balconi, Marco Diniz, Cesar Deschamps
Presenter: Teo Balconi
doi://10.26678/ABCM.ENCIT2018.CIT18-0505
Abstract
Simulation models are important in the concept and design of complex thermal systems. Low-level programming languages are commonly employed to develop such models, but in recent years high-level programming languages, such as Modelica, have shown to be a more convenient platform for the simulation of complex systems. This paper presents a transient model developed with Dymola, a development environment for Modelica, to simulate the refrigeration cycle of a household refrigerator under on-off cycling conditions. The model was developed using the ThermoCycle library and includes the description of refrigerant flow and heat transfer in the system components (compressor, heat exchangers and expansion device). After being adjusted, predictions were compared to experimental data. Good agreement was observed for the compressor model when fixed boundary conditions were prescribed. When the complete model was adopted in the simulation, greater deviations were observed due to underestimation of refrigerant charge.
Keywords
compression refrigeration cycle, dymola, Modelica, Household Refrigerator
