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Takeda, Tetsuaki; Ichimiya, Koichi*; Yamauchi, Daiki*
Nihon Kikai Gakkai Rombunshu, B, 74(748), p.189 - 196, 2008/12
The objectives of this study are to clarify performances of a heat transfer enhancement method using porous material with high porosity and to discuss applicability of this method for a gas heating type steam reformer. A heat transfer experiment has been performed using a simulated steam reformer apparatus to obtain characteristics of heat transfer and pressure drop. From the results obtained in this experiment, this method showed a good performance regarding heat transfer. It was also found that an enhancement of heat transfer using porous material with high porosity is further improved under the high temperature conditions as compared with the other methods. There is the possibility of the adoption of this method to the steam reformer of the hydrogen production system connected to a high temperature gas-cooled reactor.
Takeda, Tetsuaki; Ichimiya, Koichi*; Yamauchi, Daiki*
no journal, ,
A technology development of a hydrogen production system by a nuclear heat is being performed as a heat application system of a high-temperature gas cooled reactor in the Japan Atomic Energy Research Institute. The objective of this study is to clarify heat transfer characteristics of the steam reformer inserted metallic wire with high porosity. An experiment has been performed using a double coaxial channel and single channel with metallic wire to obtain the heat transfer characteristics. From the results obtained in this experiment, it seems to be probable that an enhancement of heat transfer method using metallic wire inserts is further improved under the high temperature conditions in efficiency as compared with the conventional reformer.
Ichimiya, Koichi*; Takeda, Tetsuaki; Yamauchi, Daiki*
no journal, ,
A hydrogen production system using nuclear heat is performed as a heat application system of the HTTR in JAERI. In the present studies heat transfer improvement in the reformer tube is examined using a porous material with high porosity. In the first report, the heat transfer and flow characteristics of an annular tube were examined experimentally to obtain the basic data. These results were compared with the convenient data.