Heat Transfer Related to Gas Hydrate Formation/Dissociation

Liu, Bei; Pang, Weixin; Peng, Bao-Zi; Sun, Chang‐Yu; Chen, Guangjin

doi:10.5772/19711

Cited by 11 publications

(19 citation statements)

References 47 publications

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“…This decrease in h I is a function of rheological and structural changes in the hydrate slurry, which impact the thermal state of the hydrate-forming system. These observations are in agreement with previous findings from works by Liu et al 33 and Meindinyo et al 42 on the impact of hydrate content in the slurry on heat transfer.…”

Section: Energy and Fuelssupporting

confidence: 95%

Gas Hydrate Growth Estimation Based on Heat Transfer

et al. 2015

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Gas hydrate growth kinetics is largely ascribed to three main controlling mechanisms: intrinsic kinetics, mass transfer, and heat transfer. In this work, gas hydrate growth has been analyzed on the basis of heat transfer during stirred laboratory cell experiments at a constant pressure using pure methane as the hydrate former (structure I). For this, a heat balance model has been developed. The hydrate growth rate was related to measured gas inflow to maintain pressure in the cell constant. Produced heat from hydrate formation is estimated using the heat balance model, and then the amount of hydrate formed is estimated through the enthalpy of methane hydrate formation. The simulated results from the model give a fair representation of the main growth parameters, gas flow/hydrate growth rate, and cumulative growth/gas consumption. Heat transfer through the hydrate slurry changes with increasing the hydrate content. The analysis suggests inclusion of the transient nature of the heattransfer coefficient for accurate prediction of hydrate growth when modeling based on heat transfer. Taking the transient effect into consideration, good correlation between estimates and measurements were obtained.

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Section: Energy and Fuelssupporting

confidence: 95%

Gas Hydrate Growth Estimation Based on Heat Transfer

et al. 2015

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“…For the different S hi , it is clear that the temperatures decreased below the freezing point, which induced the formation of ice during the production period. The formation of ice blocked the flow of gas and suppressed the hydrate dissociation and gas production, which was also observed by Pang et al [23,60]. The experimental results suggested that auxiliary heat transfer measures were necessary at this stage and were added during the depressurization method to improve the rate of gas production.…”

Section: Tablesupporting

confidence: 73%

Evaluation of gas production from methane hydrates using depressurization, thermal stimulation and combined methods

et al. 2015

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“…A new re-gasification system, in which warm water penetrates through a bed of gas hydrate pellets for the recovery of gas from stored hydrate, was investigated to achieve a more compact and more efficient re-gasification system by Tanaka et al [18,19]. The heat transfer in quiescent hydrate formation/dissociation reactor has been studied by Bei Liu et al [20,21]. Their results indicated that a stage of buffered dissociation occurred when the hydrates was heated to temperatures approaching the melting point of ice.…”

Section: Introductionmentioning

confidence: 99%

Heat Transfer Analysis of Methane Hydrate Sediment Dissociation in a Closed Reactor by a Thermal Method

et al. 2012

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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 ΔT oi grows until the temperature reaches 40 °C. The period of ΔT oi have a close relation with the total time of hydrate dissociation. Especially, the period of ΔT oi with production temperature of 10 °C is twice as much as that at other temperatures. Under OPEN ACCESSEnergies 2012, 5 1293 these experimental conditions, the heat is mainly transferred by conduction from the dissociated zone to the dissociating zone and the production temperature has little effect on the convection of the water in the porous media.

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Heat Transfer Related to Gas Hydrate Formation/Dissociation

Cited by 11 publications

References 47 publications

Gas Hydrate Growth Estimation Based on Heat Transfer

Gas Hydrate Growth Estimation Based on Heat Transfer

Evaluation of gas production from methane hydrates using depressurization, thermal stimulation and combined methods

Heat Transfer Analysis of Methane Hydrate Sediment Dissociation in a Closed Reactor by a Thermal Method

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