Thermodynamic Properties Analysis of Natural Gas Vehicle Tank in The Process of Desorption

Abstract:

In order to study thermal parameters changes of the adsorbed natural gas vehicle tanks in the desorption deflated process and the influence of desorption rate and the maximum amount of desorption, heat and mass transfer model of natural gas, activated carbon adsorbents and gas tank are established. Adsorption-desorption processes are calculated within the storage tank temperature, pressure and adsorption amount of change through numerical simulation. In this paper, the author also analyzes the factors affecting the amount of adsorption and desorption, provides theoretical references for proposing the measures of thermal desorption effect. The results show that the desorption process is endothermic process, the average temperature of adsorbent reduced from 293.15K reduced to 250.46K at the end of the desorption process. Among them, the largest temperature drop is at the center of the tank, reduced 49K to 244K. At the same time, the efficiency of desorption meets a reduction of 24.49% than in the isotherm desorption. The faster the desorption process, the less the heat provided by the wall and the lower the efficiency of desorption.