高圧水素容器への急速水素充てん中の伝熱特性(熱工学,内燃機関,動力など)

概要

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An experiment has been made to measure the rise in temperature of a gas during filling a tank at high pressure. The experimental condition is that filling gases are Nitrogen and Hydrogen at a pressure of 5 to 35MPa and at a filling mass of G=45 to 324g/min for Hydrogen. The temperatures are measured either horizontally or vertically at five positions in the tank. It is found that heat loss transferred from compressed gas to the tank wall has a significant effect on the rise in the filled gas temperature. The heat transfer coefficient is estimated after the end of filling and is about α_h=270W/(m^2K) for the Hydrogen at 35MPa. A theoretically procedure is proposed to calculate the temperature increase of the gas on a basis of assumption that the gas temperature in the tank is uniform at any time, and the heat transfer coefficient is given. The calculation shows that the temperature is in reasonable agreement with the measured temperatures by assuming α_h=500W/(m^2K) during the filling of hydrogen at 35MPa, although the estimated heat loss after the end of filling becomes larger than the actual one.
社団法人日本機械学会の論文
2006-03-25