A self-tuning semi-empirical model for the transient simulation of domestic refrigerators is presentedin this paper. The model is based on a quasi-steady approach, where the time variations associatedwith the thermal inertia of the refrigerated compartments and heat exchangers (condenser andevaporator) are considered, whereas the refrigeration loop is modelled assuming steady-stateconditions. The model was coded in Modelica language and validated against experimental dataobtained for two different refrigerator platforms namely, natural-draft all-refrigerator and fan-anddampertop-mount (Combi) refrigerator. Additionally, a self-tuning method was put forward to identifythe values of the model closing parameters, such as thermal conductances and capacities. Whencompared with experimental data obtained in-house, an agreement between model predictions andexperimental counterparts within ±10% error bands for the power consumption, and within ±1°Cthresholds for the compartment air temperatures can be observed. Taking as reference an Intel®Core™ i5 7th generation processor, it is possible to simulate 3 h of cycling operation in 15 s of CPU.
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