Author: Zhao Jiafei Cheng Chuanxiao Song Yongchen Liu Weiguo Liu Yu Xue Kaihua Zhu Zihao Yang Zhi Wang Dayong Yang Mingjun
Publisher: MDPI
E-ISSN: 1996-1073|5|5|1292-1308
ISSN: 1996-1073
Source: Energies, Vol.5, Iss.5, 2012-05, pp. : 1292-1308
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Abstract
The heat transfer analysis of hydrate-bearing sediment involved phase changes is one of the key requirements of gas hydrate exploitation techniques. In this paper, experiments were conducted to examine the heat transfer performance during hydrate formation and dissociation by a thermal method using a 5L volume reactor. This study simulated porous media by using glass beads of uniform size. Sixteen platinum resistance thermometers were placed in different position in the reactor to monitor the temperature differences of the hydrate in porous media. The influence of production temperature on the production time was also investigated. Experimental results show that there is a delay when hydrate decomposed in the radial direction and there are three stages in the dissociation period which is influenced by the rate of hydrate dissociation and the heat flow of the reactor. A significant temperature difference along the radial direction of the reactor was obtained when the hydrate dissociates and this phenomenon could be enhanced by raising the production temperature. In addition, hydrate dissociates homogeneously and the temperature difference is much smaller than the other conditions when the production temperature is around the 10 °C. With the increase of the production temperature, the maximum of Δ
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