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1. (WO2018178465) ADAPTIVE CONTROL METHOD FOR REFRIGERATION SYSTEMS

Pub. No.:    WO/2018/178465    International Application No.:    PCT/ES2018/070246
Publication Date: Fri Oct 05 01:59:59 CEST 2018 International Filing Date: Wed Mar 28 01:59:59 CEST 2018
IPC: F25D 17/06
F25D 21/04
F25B 49/00
Applicants: UNIVERSITAT DE LLEIDA
AKO ELECTROMECANICA, S.A.L
Inventors: ALBETS CHICO, Xavier
MORENO ARGILES, Pere
GONZÁLEZ SÁNCHEZ, Miguel Angel
CABEZA FABRA, Luisa Fernanda
Title: ADAPTIVE CONTROL METHOD FOR REFRIGERATION SYSTEMS
Abstract:
The invention relates to an adaptive control method for refrigeration systems that comprises detecting the level of frost in the evaporator by means of a method for calculating the NTU rate, making it possible to define: the best time for defrosting, the energisation of the drainage resistors and the adaptive management of the evaporator fan, combining various operating modes: an ice-free mode that only uses the refrigerating power of the refrigerant, and various modes with ice that use the latent heat stored in the ice to save energy, depending on the level of frost in the evaporator. The NTU rate is calculated taking as reference the evaporator when dry at the start, and when the refrigeration system is operational, the NTU rate is calculated with an operating mode having variable frequency according to the performance of the evaporator or level of ice, comparing same with the aforementioned reference.