Sammendrag
Climate change is one of the greatest challenges facing the world today, and reducing
greenhouse gas emissions is a critical part of mitigating its impacts. Conventional residential
heat pumps use Hydrofluorocarbons (HFCs) as the working fluid which are very potent green
house gases. CO2 has zero-ozone depletion potential, low Global Warming Potential (GWP),
non-toxicity, non-flammability, and superior thermodynamic properties, showing good promise
as a replacement candidate for the conventional working fluid. In this thesis the performance of
a trans-critical CO2 was investigated using modeling tool Dymola. The model was calibrated
against a real-world protype heat pump to show its validity. The optimal parameters were
found, and it shows that the system gives 39% performance over the baseline, showcasing just
how important effective design is.