Dynamic Modelling and Optimization of a Supermarket CO2 Refrigeration System for Demand Side Management

Model-based optimization tools for demand side management using supermarket refrigeration systems are considered. A model for medium-sized supermarket freezer and cooler temperatures is developed, as well as for the CO2 compressor cycle power consumption. Model parameters are estimated from measured data. The formulation of an optimization problem vs. various electricity markets is briefly discussed, and an illustrative numerical simulation of demand side management optimization in a supermarket is provided. The developed model provides a feasible tool for including the supermarket thermal capacity dynamics into the optimization problem.