Local variation of frost layer thickness and morphology

Qu, K. Y.; Komori, Satoru; Jiang, Yi

doi:10.1016/j.ijthermalsci.2005.05.004

Cited by 46 publications

(5 citation statements)

References 14 publications

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“…In order to avoid sublimation of the solid CO 2 , FPSC-3 is connected to maintain the low-temperature conditions in the storage tower. The detailed configuration of the cryogenic system has been described in our previous work. − …”

Section: Deposition Co2 Capture Processmentioning

confidence: 99%

Deposition CO₂ Capture Process Using a Free Piston Stirling Cooler

Song

Kitamura

et al. 2013

Ind. Eng. Chem. Res.

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As a promising alternative to mitigate the emission of CO 2 , cryogenic CO 2 capture techniques have been paid increasing attention. In our previous works, a novel deposition CO 2 capture process based on free piston Stirling coolers (FPSCs) has been developed. Compared to conventional cryogenic CO 2 capture approaches, FPSC was selected to provide cold energy for CO 2 deposition because of its significant advantages (such as high efficiency, high reliability, small size, environmental friendliness, etc.). The performance of the exploited system has been verified by numerical models. The aim of this work is to experimentally test the CO 2 capture performance of the system. In detail, the influence of the temperature of FPSC and flow rate of the gas stream was investigated. Finally, a brief comparison of the dominant technologies was undertaken. Experimental results showed that the system can capture 95% CO 2 from the simulated flue gas and consume 0.55 MJ electrical energy per kilogram of CO 2 recovered.

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Section: Deposition Co2 Capture Processmentioning

confidence: 99%

Deposition CO₂ Capture Process Using a Free Piston Stirling Cooler

Song

Kitamura

et al. 2013

Ind. Eng. Chem. Res.

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“…The initial porosity of the frost layer directly influences the frost layer growth characteristics [22]. The variation of frost crystal growth direction contributes to the changes in frost growth rate [23]. Moreover, frost crystal shape was considered as a key factor affecting frost thermal conductivities [2].…”

Section: Introductionmentioning

confidence: 99%

Variation of Frost Roughness on a Flat Plate Under Forced Convection

Tongxin

O’Neal

McClain

2020

Journal of Thermal Science and Engineering Applications

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Experiments were conducted on a cold flat plate to characterize the variation of frost roughness over both time and location on the surfaces. The testing conditions included air temperatures from 8 to 16°C, wall temperatures from −20 to −10°C, relative humidities from 60 to 80%, and air velocities from 0.5 to 2.5 m s−1. A 3-D photogrammetric method was employed to measure the variation in frost root-mean-square height and skewness by location and time. These data were used to develop the equivalent sand-grain roughness for the frost at different locations and time. The experimental results showed that frost roughness varied by location and changed with time. For the environmental conditions in this study, relative humidity and air temperature were the most important factors determining changes in the peak frost roughness. For example, at an air temperature of 12ºC and surface temperature of −15ºC, the frost roughness peaked at about 40 minutes for a relative humidity of 80% and 90 minutes for a relative humidity of 60%. Empirical correlations were provided to describe the relationships between the environmental conditions and the appearance of the peak frost roughness.

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“…So, digital rock technology is an effective method to solve these problem [8]. For this reason, this paper selected typical sandstone rock from research area, and then construct three-dimensional digital rock models with different hydrate saturation using the diffusion limited aggregation (DLA) model [9][10][11], and calculated the electrical properties using the finite element method [12,13] to explore the sensitivity of electrical properties to various influencing factors. The results can be used to study the conductivity of rocks, establish different conductivity models and log interpretation models, and lay a theoretical foundation for evaluating hydrate saturation and calculating reserves [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity Analysis of Rock Electrical Influencing Factors of Natural Gas Hydrate Reservoir in Permafrost Region of Qilian Mountain, China

et al. 2019

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It has been found that the relatively low abundance of gas hydrate in the Muli area of the Qilian Mountain causes gas hydrate reservoirs to have low-resistivity characteristics similar to those of low-resistivity oil and gas reservoirs. Therefore, it has great significance to research the main controlling factors affecting the electrical properties, and then come up a new logging identification and evaluation model for low-resistivity gas hydrate reservoirs. In this investigation, the rock samples of sandstone from gas hydrate reservoirs were scanned by CT and combined with gas hydrate distribution characteristics. The three-dimensional digital rocks with different hydrate saturation were constructed using the diffusion limited aggregation (DLA) model, and the resistivity was simulated via the finite element method. After sorting out the influencing factors of electrical characteristics, the sensitivity of the factors affecting electrical properties was evaluated using orthogonal analysis, using variance analysis and trend analysis to quantitatively evaluate the influencing factors of rock electrical sensitivity, so as to distinguish the main and secondary factors affecting rock electrical sensitivity. The results show that the sensitivity of rock electrical properties to the six influencing factors from strong to weak are: formation water salinity, water film thickness, shale content, conductive mineral content, micropores, and average coordination number.

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Local variation of frost layer thickness and morphology

Cited by 46 publications

References 14 publications

Deposition CO₂ Capture Process Using a Free Piston Stirling Cooler

Deposition CO₂ Capture Process Using a Free Piston Stirling Cooler

Variation of Frost Roughness on a Flat Plate Under Forced Convection

Sensitivity Analysis of Rock Electrical Influencing Factors of Natural Gas Hydrate Reservoir in Permafrost Region of Qilian Mountain, China

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Local variation of frost layer thickness and morphology

Cited by 46 publications

References 14 publications

Deposition CO2 Capture Process Using a Free Piston Stirling Cooler

Deposition CO2 Capture Process Using a Free Piston Stirling Cooler

Variation of Frost Roughness on a Flat Plate Under Forced Convection

Sensitivity Analysis of Rock Electrical Influencing Factors of Natural Gas Hydrate Reservoir in Permafrost Region of Qilian Mountain, China

Contact Info

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Deposition CO₂ Capture Process Using a Free Piston Stirling Cooler

Deposition CO₂ Capture Process Using a Free Piston Stirling Cooler