Solution of Energy Supply for Deep Ocean Installations: Design and Testing of a Micro-Fluid Turbine

2014 ◽  
Vol 472 ◽  
pp. 247-253
Author(s):  
Ying Yuan Tian ◽  
Yun Hai Zhang ◽  
Xu Jun Wang
Keyword(s):  
Deep Sea ◽  
High Efficiency ◽  
Mechanical Energy ◽  
Deep Ocean ◽  
Ocean Current ◽  
Test Results ◽  
Contact Transmission ◽  
Design And Testing ◽  
Current Energy ◽  
Ocean Current Energy

A micro-fluid turbine has been successfully tested in the laboratory and towing tank. This 2m diametral device is designed to operate in flows with velocity from 0.1m/s to 1m/s. The designed output power varies from 0.3W to 200W. In this design, the low density ocean current energy in deep-sea stored as mechanical energy in plane roll-up spring first. When the spring has enough potential energy, it drives the generator to generate electricity. Through this assistant start approach, the turbine can work in ultra-low-speed current. On the other hand, the non-contact transmission remarkably reduced the drag torque of hubcap. Besides these approaches, some other advanced technologies, such as self-adaptive platform, high efficiency energy storage, and intelligent control, are applied in this turbine. Test results show that the micro-fluid turbine has potential to provide power for instruments and equipment in deep-sea environment.

scholarly journals Compact Low-Velocity Ocean Current Energy Harvester Using Magnetic Couplings for Long-Term Scientific Seafloor Observation

2020 ◽  
Vol 8 (6) ◽  
pp. 410
Author(s):  
Longxiang Huang ◽  
Feng Lyu
Keyword(s):  
Energy Harvester ◽  
Optimal Parameter ◽  
Ocean Current ◽  
Low Velocity ◽  
3D Fem ◽  
Seafloor Observation ◽  
Magnetic Couplings ◽  
Current Energy ◽  
Ocean Current Energy

A compact low-velocity ocean current energy harvester (LOCH) is developed to power undersea instrument platforms for long-term scientific seafloor observation. Noncontact magnetic couplings are used in the LOCH to eliminate friction and achieve reliable underwater sealing so that the LOCH can adapt the low-velocity ocean current and its energy transmission efficiency can be improved. The parameters of the magnetic couplings are optimized by the three-dimensional finite-element method (3D FEM). A laboratory experiment platform is designed; and the static and dynamic performances of the magnetic couplings with different parameters are tested. The experiment results are compared with computer simulations to verify the optimal parameter design. Finally; a prototype of the LOCH is designed and its underwater experiment proves that it can start smoothly and work stably at a current velocity of as low as 0.4 m/s

Ocean Current Energy Conversion

2016 ◽  
pp. 1147-1162
Author(s):  
Howard P. Hanson ◽  
James H. VanZwieten ◽  
Gabriel M. Alsenas
Keyword(s):  
Energy Conversion ◽  
Ocean Current ◽  
Current Energy ◽  
Ocean Current Energy

scholarly journals Study on Key Design Technology of Energy Capture for Ocean Current Energy Generator Unit

2018 ◽  
Vol 170 ◽  
pp. 042067
Author(s):  
Jingchun Chu ◽  
Ling Yuan ◽  
Fayong Jia ◽  
Ting Wang ◽  
Lei Pan ◽  
...  
Keyword(s):  
Ocean Current ◽  
Design Technology ◽  
Energy Capture ◽  
Generator Unit ◽  
Current Energy ◽  
Ocean Current Energy

Application of Mechanical Energy Storage in Micro-Fluid Turbine Design

2014 ◽  
Vol 472 ◽  
pp. 374-378
Author(s):  
Ying Yuan Tian ◽  
Xu Jun Wang ◽  
Gong Xiang Ji
Keyword(s):  
Energy Storage ◽  
Mechanical Energy ◽  
Storage System ◽  
Deep Ocean ◽  
Energy Storage System ◽  
Ocean Current ◽  
Low Speed ◽  
Speed Flow ◽  
Marine Current ◽  
Turbine Design

A micro-fluid turbine with mechanical energy storage system is designed and successfully tested in laboratory. As energy supplement for deep ocean installations, this patent design solved the problem of difficult generating electricity in ultra-low speed flow. The conventional marine current turbine can hardly get start in flows with velocity lower than 0.5m/s, whereas the marine current speed is seldom higher than one knot in deep sea. By adding a mechanical energy storage system, the rotor of the micro-fluid turbine first captures the fluid kinetic energy from the ultra-low speed flow, and then the energy transferred to the mechanical energy storage system, in which a plane scroll spring is used to store the limited energy and drive the generator automatically when it has enough potential energy. Simulation and laboratory test show that this method has potential for power generating in low density ocean current environment.

scholarly journals Evidence of eddy-related deep-ocean current variability in the northeast tropical Pacific Ocean induced by remote gap winds

2020 ◽  
Vol 17 (24) ◽  
pp. 6527-6544
Author(s):  
Kaveh Purkiani ◽  
André Paul ◽  
Annemiek Vink ◽  
Maren Walter ◽  
Michael Schulz ◽  
...  
Keyword(s):  
Pacific Ocean ◽  
Deep Sea ◽  
Seasonal Variability ◽  
Mesoscale Eddies ◽  
Deep Ocean ◽  
Tropical Pacific ◽  
Ocean Current ◽  
Tropical Pacific Ocean ◽  
Gap Winds ◽  
Anticyclonic Eddies

Abstract. There has been a steady increase in interest in mining of deep-sea minerals in the Clarion–Clipperton Zone (CCZ) in the eastern Pacific Ocean during the last decade. This region is known to be one of the most eddy-rich regions in the world ocean. Typically, mesoscale eddies are generated by intense wind bursts channeled through gaps in the Sierra Madre mountains in Central America. Here, we use a combination of satellite and in situ observations to evaluate the relationship between deep-sea current variability in the region of potential future mining and eddy kinetic energy (EKE) in the vicinity of gap winds. A geometry-based eddy detection algorithm has been applied to altimetry sea surface height data for a period of 24 years, from 1993 to 2016, in order to analyze the main characteristic parameters and the spatiotemporal variability of mesoscale eddies in the northeast tropical Pacific Ocean (NETP). Significant differences between the characteristics of eddies with different polarity (cyclonic vs. anticyclonic) were found. For eddies with lifetimes longer than 1 d, cyclonic polarity is more common than anticyclonic rotation. However, anticyclonic eddies are larger in size, show stronger vorticity, and survive longer in the ocean than cyclonic eddies (often 90 d or more). Besides the polarity of eddies, the location of eddy formation should be taken into consideration when investigating the impacted deep-ocean region as we found eddies originating from the Tehuantepec (TT) gap winds lasting longer in the ocean and traveling farther distances in a different direction compared to eddies produced by the Papagayo (PP) gap winds. Long-lived anticyclonic eddies generated by the TT gap winds are observed to travel distances up to 4500 km offshore, i.e., as far as west of 110∘ W. EKE anomalies observed in the surface of the central ocean at distances of ca. 2500 km from the coast correlate with the seasonal variability of EKE in the region of the TT gap winds with a time lag of 5–6 months. A significant seasonal variability of deep-ocean current velocities at water depths of 4100 m was observed in multiple-year time series data, likely reflecting the energy transfer of the surface EKE generated by the gap winds to the deep ocean. Furthermore, the influence of mesoscale eddies on deep-ocean currents is examined by analyzing the deep-ocean current measurements when an anticyclonic eddy crosses the study region. Our findings suggest that despite the significant modulation of dominant current directions driven by the bottom-reaching eddy, the current magnitude intensification was not strong enough to trigger local sediment resuspension in this region. A better insight into the annual variability of ocean surface mesoscale activity in the CCZ and its effects on deep-ocean current variability can be of great help to mitigate the impact of future potential deep-sea mining activities on the benthic ecosystem. On an interannual scale, a significant relationship between cyclonic eddy characteristics and El Niño–Southern Oscillation (ENSO) was found, whereas a weaker correlation was detected for anticyclonic eddies.

scholarly journals PENELITIAN POTENSI ENERGI ARUS LAUT SEBAGAI SUMBER ENERGI BARU TERBARUKAN DI PERAIRAN TOYAPAKEH NUSA PENIDA BALI

2016 ◽  
Vol 8 (3) ◽  
pp. 139 ◽  
Author(s):  
Ai Yuningsih ◽  
Ahmad Masduki
Keyword(s):  
Local Community ◽  
Meteorological Parameter ◽  
Energy Resource ◽  
Ocean Current ◽  
Energy Potential ◽  
Community Based ◽  
Coastal Morphology ◽  
Average Current ◽  
Current Energy ◽  
Ocean Current Energy

Metode penelitian potensi energi arus yang diterapkan adalah pengukuran arus, pengamatan pasang surut, pengamatan parameter meteorologi dan kondisi morfologi pesisir dan dasar laut daerah penelitian. Hasil penelitian menunjukkan bahwa lokasi penempatan turbin arus laut cukup memenuhi syarat dengan morfologi relatif landai pada kedalaman ± 20 meter dan dekat dari pemukiman penduduk. Kecepatan arus rata-rata di perairan Toyapakeh mencapai kecepatan 2,5 – 3,0 m/detik dengan durasi 9 – 18 jam/hari untuk kecepatan diatas 0,5 m/detik. Dengan demikian, perairan di Toyapakeh merupakan lokasi yang cukup potensial untuk dimanfaatkan sebagai sumber energi baru terbarukan, khususnya pembangkit Listrik Tenaga Arus Laut (PLTAL). Kata Kunci : energi arus laut, turbin arus laut, energi baru terbarukan, Selat Toyapakeh The methods of current energy potential study are current measurements, tidal and meteorological parameter observations, condition of coastal morphology and seafloor of the study area. The results show that, the location for turbine position is in area with relatively gentle slope morphology at a 20 meters water depth and it is close to local community. Based on the analysis of flow water conditions at Toyapakeh Strait, the average current velocity is about 2,5m/s to 3,0 m/s and within 24 hours, the flow velocity is greater than 0.5 m/s occurs for approximately 9 to 18 hours. Therefore, the results of the ocean current energy analysis indicate that the study area is very potential for using reneawable energy resource as a power plant location. Keywords: ocean currents energy, Sea Current Turbin, renewable energy, Toyapakeh Strait.

Working Tools Study for JiaoLong Manned Submersible

2019 ◽  
Vol 53 (2) ◽  
pp. 56-64
Author(s):  
Xianpeng Shi ◽  
Yugang Ren ◽  
Jialing Tang ◽  
Wentao Fu ◽  
Baohua Liu
Keyword(s):  
Deep Sea ◽  
High Efficiency ◽  
Deep Ocean ◽  
Basic Research ◽  
Extreme Environment ◽  
The Past ◽  
Wide Range ◽  
Manned Submersible ◽  
Observation Function ◽  
Scientific Questions

AbstractThe remarkable progress in deep submergence science with manned submersibles in the past 50 years has made it possible for us to directly explore the inaccessible underwater extreme environment. Basic research carried out at depths over 1,000 m in the deep ocean has provided dramatic and unique insights into some of the most compelling scientific questions ever posed. Deep research manned submersibles have been widely recognized as indispensable platforms for conducting deep-sea research. Whereas all deep-sea submersibles share the unique feature of direct observation function by scientists and pilots from the cabin, all manned submersibles are equipped with different tools to implement a wide range of jobs in different exploration purposes. These can directly affect productivity and each dive's outcomes, such that it would be meaningful to study the samplers, sensors, and other devices that have been installed on the different deep-sea research manned submersibles around the world. This article will also introduce the research and development status of the JiaoLong manned submersible's operational tools, which have been researched and tested during the sea trials and test operational phase over the past 9 years. Based on developed technologies, state-of-the-art tools are essential to achieve a high-efficiency use for each dive. The article brings forward discussion and suggestions for the development of JiaoLong's operational tools, followed by a conclusion from the perspective of JiaoLong's operation team.

Ocean Current Energy

2021 ◽  
Author(s):  
James VanZwieten ◽  
Yufei Tang
Keyword(s):  
Ocean Current ◽  
Current Energy ◽  
Ocean Current Energy
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