Deep-Sea Sediment and Water Simulator for Investigation of Methane See** and Hydrate Formation
Abstract
:1. Introduction
2. Apparatus and Methods
2.1. Apparatus Description
2.1.1. Deep-Sea Sediment and Water Simulator (DSSWS)
2.1.2. Temperature, Gas Flow, and Pressure Control System
3. Experimental Validation for Methane See** and Hydrate Formation
3.1. Experimental Methods
3.2. Experimental Results
3.2.1. Electric Resistance and Temperature Evolution Characteristics
3.2.2. Gas Content Change in the Liquid and Gas Phases
3.2.3. Cumulative Volume Changes of Incoming and Outgoing Gas
3.2.4. Visual Observation with Built-In Camera and External Windows
4. Conclusions
- The monitoring of the bubble migration path and hydrate transformation and aggregation in the sediment chamber could be realized, mainly through the spatial distribution of electric resistance and temperature measurement points.
- The rising characteristic and morphological evolution of gas and hydrate bubbles in seawater chamber are recorded through a built-in, movable camera and four external windows.
- The quantitative storage and escape of CH4 could be realized through the measurement of multiple gas/liquid collection ports and cumulative incoming/outgoing gas volumes.
- The effectiveness test of the experiment system showed that the local sediment resistance values increased first, and after a period of time, the sediment resistance values rose as a whole. Only the accumulative CH4 bubbles form the hydrate simultaneously, and a large amount of exothermic heat may lead to the obvious change of local temperature. In addition, the image recording and gas measurement results also presented a great regularity. The experimental results prove the good functions of the simulator.
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
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Number | Sensor Type | Test Ranges | Accuracy |
---|---|---|---|
1 | Temperature | −20~280 °C | ±0.1 °C |
2 | Pressure | 0~25,000 KPa | ±25 KPa |
3 | Electric resistance | 0~1000 KΩ | ±0.1 KΩ |
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**e, Y.; Feng, J.; Hu, W.; Zhang, M.; Wang, J.; Peng, B.; Wang, Y.; Zhou, Z.; Wang, Y. Deep-Sea Sediment and Water Simulator for Investigation of Methane See** and Hydrate Formation. J. Mar. Sci. Eng. 2022, 10, 514. https://doi.org/10.3390/jmse10040514
**e Y, Feng J, Hu W, Zhang M, Wang J, Peng B, Wang Y, Zhou Z, Wang Y. Deep-Sea Sediment and Water Simulator for Investigation of Methane See** and Hydrate Formation. Journal of Marine Science and Engineering. 2022; 10(4):514. https://doi.org/10.3390/jmse10040514
Chicago/Turabian Style**e, Yan, **gchun Feng, Weiqiang Hu, Mingrui Zhang, Junwen Wang, Bo Peng, Yujun Wang, Zhenwu Zhou, and Yi Wang. 2022. "Deep-Sea Sediment and Water Simulator for Investigation of Methane See** and Hydrate Formation" Journal of Marine Science and Engineering 10, no. 4: 514. https://doi.org/10.3390/jmse10040514