Numerical Simulation of Thermodynamic Gas Transfer Processes in High-Pressure Composite Vessels

This paper mainly presents the economic and technical limitations of Compressed Natural Gas (CNG) transportation by ship, particularly the low ratio of gas mass to container weight and the inefficiencies in loading and unloading processes that impact the overall project feasibility. The system validated that CNG loading requires 35–51 hours and unloading 46–55 hours, depending on seasonal hold temperatures. The key objectives were to develop a simulation model to accurately assess process durations, determine the total mass of transported gas, and also calculate the power and energy requirements for high-pressure systems under various operating strategies, including a comparative analysis between methane and hydrogen. With the development of a MATLAB-based process simulation model designed specifically on the GASVESSEL project, this greatly utilizes the Type III composite vessels.