圧力容器試験用電気炉及び試料容器の昇温特性

概要

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Heat rate characteristics were examined for 4 pressure vessels and 3 heating furnaces of the pressure vessel test designted by the Fire Services Law. The heat rate of liquid silicon oil in the A1 cup can be kept 40°C/min by applying 70V electricity to the furnace and controlling the furnace temperature at 810°C. The standard deviation (σ) of the heating rate was 2.4°C/min for 15 experiments using 3 pressure vessels. No significant deffirences were observed among the vessels and the furnaces. The temperature differences between bottom and center of samples were about 20°C for silicon oil and 50°C for α-alumina powder, respectively. Applying continuous electric current to the furnace, the experiments could not be carryed out under constant furnace temperature. It was also found that it was important to fix the position of thermocouples for controlling furnace temperature to keep constant.
日本火災学会の論文