Maintenance of loading and unloading processes of sea vessels at transportation of compressed natural gas
Analysis of the processes of loading and unloading of sea vessels has shown that they can proceed in critical and subcritical regimes. It is found that constant speed when loading the sea vessels is provided due to pressure gas source by the terms of the process in the critical mode. The process is characterized by constant discharge pressure decrease in gas tanks and gas flow that comes out of them. The maximum speed of the process is achieved by maintaining the critical regime through the phased introduction of the compressors. The defining parameters in determining the diameter of connecting collectors under that provided the necessary speed of the loading process are sources of gas. Collectors that selected taking into their accounting are provided the realization of loading process in the subcritical regime at the final stage in conditions of minimum overpressure of the compressor pressure filling capacity. The obtained results can be used in the design of sea vessels to transportation of compressed natural gas. They can also serve as the basis for the acquisition of individual blocks by using the proposed global manufacturers of CNG modules. Using the tested algorithms it is possible to justify the loading and unloading modes of sea vessels under the terms of individual projects.