Summary

A model-driven multivariate linear control strategy for controlling the evaporator feeding and for matching the cooling capacity to the thermal load was proposed in this study, which acts on the compressor speed and the electric expansion valve opening. A first-principles dynamic simulation model for vapor compression refrigeration systems was put forward and validated against reliable experimental data gathered using a purpose-built testing apparatus comprised of a variable-speed compressor and a pulse-width modulated electric expansion valve. It has been found that the model predictions follows closely the experiment al trends of the working pressures even in conditions far from the point of operation ( ±30%) used for the system identification exercise, with maximum deviations within 10% error bands. [...]

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