Environmental pollution is on of the topic generating more interest in different sectors. Many companies are working to decrease the emissions, Airbus aims to do that by manufacturing a commercial hydrogen powered aircraft. In this work a cryogenic tank system has been modeled, different scenario are simulated and the results are presented. After the modeling and the simulation, the model is compared with another existing model developed in a different tool, to analyze where there, discrepancies between the two model, discussing the reason and the different assumptions between the two of them.