Abstract: The traditional methods for solving air conditioning loads have problems such as large steady-state calculation results, large computational complexity in non steady state calculation processes, and low numerical analysis efficiency, which make it difficult to quickly and accurately respond to multi zone air conditioning load control requirements under complex dynamic boundaries. In response to the above issues, this article proposes to apply the RC heat transfer model based on Modelica to air conditioning load calculation, and conduct dynamic load simulation analysis using the multi zone structure in the underwater vehicle control cabin as the verification object. The results show that this method enables multi-zone dynamic load calculations under dynamic boundary conditions. By analyzing the dynamic response accuracy using measured loads from both surface and underwater navigation conditions, the average relative error rates for the total load are only 3.17% and 2.90%, respectively, with a maximum error rate below 10%. The model demonstrates high accuracy and provides valuable support for solving multi-zone dynamic load calculation challenges.