Using simulation for investigation of CNG vessels filling
DOI:
https://doi.org/10.15587/1729-4061.2014.23015Keywords:
CNG transportation technology, transport vessel filling, simulation, gas temperatureAbstract
The problematic issues, which require special attention in implementing the CNG transportation technology for individual projects are considered. In each of the cases, the problem of the filling mode optimization is an important problem, related to the cargo system operation. At a certain stage, the filling process is accompanied by a sharp expansion and temperature change of gas that can cause equipment failure. According to the results of theoretical and experimental investigations of the process of filling tanks it is found that the temperature reduction of gas as a result of its sharp expansion is present in the initial short time point and is confirmed by icing of shutoff valves during experimental investigations. The overall effect of the gas temperature reduction is such that does not lead to the wall temperature reduction. With further filling of tanks, the temperature of gas and, consequently, their walls rises. The growth rate is determined mainly by the value of initial pressure in the tank. The simulation results at different initial conditions are confirmed by experimental results with high accuracy. The results obtained showed the possibility of using simulation to assess the impact of gas temperature change on the equipment operation during compressed natural gas transportation
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