Modelling and Simulation of a CO2-based Combined Heating and Cooling System

In the rapid technological changing era and environmental challenges,modelling and simulation tools offer new possibilities to dominate theincreasing complexity of industrial applications and they enable toaccelerate innovation cycles, quickly exploring and exploiting newefficient, reliable, and green possible solutions. In particular, thispaper considers a reversible heat pump, using carbon dioxide as arefrigerant, able to provide heating, cooling, and domestic hot water tohigh energy demanding buildings. Through a mixed causal and acausalmodelling approach, a dynamic heat pump model based on Simcenter Amesimis developed and validated by exploiting experimental data under variousoperating conditions. The simulation model can be effectively used forprediction or explanation purposes allowing us to understand what thefuture system behaviour will be like or how to act for altering thesystem operation to pursue overall system efficiency and sustainablegoals.