Abstract

RODRIGUEZ-VAZQUEZ, E. E.. Dynamical Model for a Domestic Cooling Appliance by considering the Thermal Load Non-Linear Effects. RIIIT. Rev. int. investig. innov. tecnol. [online]. 2018, vol.5, n.30. ISSN 2007-9753.

Nowadays vapor compression cooling technologies which are the most used devices for ambient conditioning or food preservation are facing a technological disruptive scenario, due to the energetic performance achieved by the new alternative cooling technologies and their energetic un-sustainability. But the refrigeration experts vision converges in a prediction of a twenty years gap between the disappearance of the vapor compression technology and the commercial consolidation of a new alternative technology, so the need to improve the energetic performance of the vapor compression cooling technology, still exists. In this scenario this paper proposes the synthesization of a states space model for a vapor compression refrigerator, from the equilibrium equations of its two dynamic sub-systems (thermal and electrical). This state space model considers a set of time constant values for the thermal inertial moment taking reference of five thermal load levels. The thermal time constants were obtained from a set of experiments performed at the CIDESI-LaNITeF facilities and by using a MEMs sensors based instrument developed by LICORE. The numerical prediction of the state space model are consistent with the experimental results in terms of thermal load level and the energy demand. Model results will be used to develop a controller to optimize the refrigerator energetic performance.

Keywords : Cooling appliances; dynamical model; linear compressors; thermal load.

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