Abstract
Future refrigeration systems for cruise ships are subject to increasingly strict restrictions on refrigerants and should also contribute to increasing the overall energy efficiency of the ship. Against this background, the present diploma thesis deals with the design of a CO2 refrigeration system to supply the air-conditioning units on board of a cruise ship. The characteristics and peculiarities of CO2 as a refrigerant and the passenger ship as an application area are explained. The design of the system is explained in detail, the structure is visualized and the mode of the mode of operation is shown. In order to be able to assess the efficiency of the system, a steady-state calculation model is developed in the Python programming language. This model is also experimentally validated at the "SuperSmart Rack" test facility at the NTNU/SINTEF laboratory in Trondheim, Norway. The measurement results are extended by testing other system configurations, with the new concept proving to be the most efficient. In the final step, the validated model is scaled up to a concrete reference case with known design conditions and evaluated.