SIMULATION AND MONITORING OF A CO2 COMMERCIAL REFRIGERATION SYSTEM SERVING A SUPERMARKET IN NORTHERN ITALY

In the present paper, the simulation and the monitoring of a CO2commercial refrigeration unit serving a supermarket located in NorthernItaly are presented. The unit consists of a booster compressor rack withparallel compression that provides both the cooling load (at medium andlow temperature) and all the thermal functions in one single unit: itintegrates a heat exchanger for the air-conditioning demand andtwo-stages heat recovery, for sanitary hot water production and spaceheating. The monitoring data are used as boundary conditions to developa numerical model of the refrigeration cycle, operating in steady-stateconditions, and calculate the hourly performance of the system for thewhole year. The model is then used to evaluate the performance ofalternative configurations and another possible management of the heatrecovery system.