Hydrothermal fluid ejector for enhanced heat transfer of a thermoelectric power generator on the seafloor

2021 ◽  
Author(s):  
Xiaotao Gai ◽  
Shijun Wu ◽  
Canjun Yang
Keyword(s):  
Heat Transfer ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Hydrothermal Fluid ◽  
Enhanced Heat Transfer ◽  
Power Generator ◽  
Thermoelectric Power Generator ◽  
Observation Systems ◽  
Seafloor Observation

Interest in deep-sea hydrothermal research has been rapidly increasing. Advances in methods for harvesting energy from hydrothermal vents will facilitate long-term seafloor observation systems do not rely on batteries. A...

A Pressure-Tight Sampler with Flexible Titanium Bag for Deep-Sea Hydrothermal Fluid Samples

2020 ◽  
Vol 37 (11) ◽  
pp. 2065-2073
Author(s):  
Xun Wang ◽  
Shi-Jun Wu ◽  
Zhen-Fang Fang ◽  
Can-Jun Yang ◽  
Shuo Wang
Keyword(s):  
Organic Carbon ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Hydrothermal Fluid ◽  
Titanium Foil ◽  
Fluid Sample ◽  
Sea Trial ◽  
Diaphragm Valve ◽  
Metal Seal

AbstractThis paper details the development and application of a novel pressure-tight sampler with a metal seal capable of acquiring high-purity fluid samples from deep-sea hydrothermal vents. The sampler has a titanium diaphragm valve for sampling and a flexible titanium foil bag to store the fluid sample. Hence, all parts of the sampler in contact with the sample are made of titanium without elastomer O-ring seals to minimize the organic carbon blank of the sampler, which makes it suitable for collecting organic samples. A pressure-tight structure was specially designed to maintain the sample at in situ pressure during the recovery of the sampler. The sampler has been successfully tested in a sea trial from November 2018 to March 2019, and pressure-tight hydrothermal fluid samples have been collected.

scholarly journals A review on thermoelectric-hydraulic performance and heat transfer enhancement technologies of thermoelectric power generator system

2018 ◽  
Vol 22 (5) ◽  
pp. 1885-1903 ◽  
Author(s):  
Ting Ma ◽  
Zuoming Qu ◽  
Xingfei Yu ◽  
Xing Lu ◽  
Qiuwang Wang
Keyword(s):  
Heat Transfer ◽  
Heat Transfer Enhancement ◽  
Thermoelectric Power ◽  
Transfer Enhancement ◽  
Generator System ◽  
Power Generator ◽  
Thermoelectric Power Generator ◽  
Power And Energy Systems ◽  
Power And Energy ◽  
Enhancement Technologies

The thermoelectric material is considered to a good choice to recycle the waste heat in the power and energy systems because the thermoelectric material is a solid-state energy converter which can directly convert thermal energy into electrical energy, especially suitable for high temperature power and energy systems due to the large temperature difference. However, the figure of merit of thermoelectric material is very low, and the thermoelectric power of generator system is even lower. This work reviews the recent progress on the thermoelectric power generator system from the view of heat transfer, including the theoretical analysis and numerical simulation on thermoelectric-hydraulic performance, conventional heat transfer enhancement technologies, radial and flow-directional segmented enhancement technologies for the thermoelectric power generator system. Review ends with the discussion of the future research directions of numerical simulation methods and heat transfer enhancement technologies used for the thermoelectric power generator in high temperature power and energy systems.

scholarly journals Prolonged recovery time after eruptive disturbance of a deep-sea hydrothermal vent community

2020 ◽  
Vol 287 (1941) ◽  
pp. 20202070
Author(s):  
L. S. Mullineaux ◽  
S. W. Mills ◽  
N. Le Bris ◽  
S. E. Beaulieu ◽  
S. M. Sievert ◽  
...  
Keyword(s):  
Species Composition ◽  
Deep Sea ◽  
Hydrothermal Vents ◽  
Human Impacts ◽  
Environmental Gradients ◽  
Natural Disturbance ◽  
Regional Species Pool ◽  
Distributed Sampling ◽  
Baseline State

Deep-sea hydrothermal vents are associated with seafloor tectonic and magmatic activity, and the communities living there are subject to disturbance. Eruptions can be frequent and catastrophic, raising questions about how these communities persist and maintain regional biodiversity. Prior studies of frequently disturbed vents have led to suggestions that faunal recovery can occur within 2–4 years. We use an unprecedented long-term (11-year) series of colonization data following a catastrophic 2006 seafloor eruption on the East Pacific Rise to show that faunal successional changes continue beyond a decade following the disturbance. Species composition at nine months post-eruption was conspicuously different than the pre-eruption ‘baseline' state, which had been characterized in 1998 (85 months after disturbance by the previous 1991 eruption). By 96 months post-eruption, species composition was approaching the pre-eruption state, but continued to change up through to the end of our measurements at 135 months, indicating that the ‘baseline' state was not a climax community. The strong variation observed in species composition across environmental gradients and successional stages highlights the importance of long-term, distributed sampling in order to understand the consequences of disturbance for maintenance of a diverse regional species pool. This perspective is critical for characterizing the resilience of vent species to both natural disturbance and human impacts such as deep-sea mining.

Long-Term performance of a commercial Thermoelectric Power Generator

2009 ◽  
Vol 1166 ◽  
Author(s):  
Euripides Hatzikraniotis ◽  
Konstantinos Zorbas ◽  
Theodora Kyratsi ◽  
Konstantinos M Paraskevopoulos
Keyword(s):  
Ir Spectroscopy ◽  
Seebeck Coefficient ◽  
Thermoelectric Power ◽  
Thermoelectric Generator ◽  
Thermoelectric Device ◽  
Power Generator ◽  
Thermoelectric Power Generator ◽  
Long Term Performance ◽  
Term Performance

AbstractIn this work, thermoelectric device was made, using a commercially available ThermoElectric Generator (TEG), in order to measure the gained power and efficiency for long-term performance. The module was subjected to sequential hot side heating at 200°C (392 0F), and cooling for 6000 cycles, in order to measure the TEG's power and EMF change. A 14% increase in the TEG’s material resistance was found, as well as a 5% reduction in the Seebeck coefficient. After the experiment, the module was disassembled and thermoelectric p- and n- legs were examined using IR spectroscopy.

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