International Journal of Marine Energy最新文献_第8页

Tidal stream resource assessment in the Dover Strait (eastern English Channel) 多佛海峡(英吉利海峡东部)潮汐流资源评价

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/j.ijome.2016.08.004

Maxime Thiébaut, Alexei Sentchev

{"title":"Tidal stream resource assessment in the Dover Strait (eastern English Channel)","authors":"Maxime Thiébaut, Alexei Sentchev","doi":"10.1016/j.ijome.2016.08.004","DOIUrl":"https://doi.org/10.1016/j.ijome.2016.08.004","url":null,"abstract":"<div><p>A methodology of tidal flow resource assessment in the Dover Strait is presented. The resource assessment is performed using surface velocity time series recorded by Very High Frequency Radars (VHFR) and ADCP velocity measurements. Following the EMEC guideline, the major parameters of tidal flow conventionally used for tidal energy site screening are estimated and mapped. The combination of two sources of data allowed to characterize the current velocity variation in three spatial dimensions and in time, which increased confidence in hydrokinetic resource assessment from the radar data. Current velocities provided by the radars show strong spatial variation and fortnightly modulation. The most energetic area was found west of the Cape Gris Nez with the peak velocity of 2.5m/s, mean velocity of 1m/s, and spring tide average velocity of 1.4m/s. Velocities exceeding 1m/s are observed more than 50% of time there. Averaged velocity profiles derived from ADCP data were obtained for different stages of the tidal cycle and then approximated by a power law function. Using velocity time series provided by the radars and the power law velocity profiles, the power density time series in the surface and bottom layers were generated. The analysis of these data show that west of the Cape Gris Nez, the mean power density attains its maximum value 0.9kW/m<sup>2</sup> in the surface layer and a peak value 5kW/m<sup>2</sup>. In the rest of the domain, the mean power density varies from 0.1 to 0.6kW/m<sup>2</sup>. The power density is found three times lower in the bottom layer. A three dimensional hydrodynamic model MARS-3D is used for comparison with experimental data. The model results are in good agreement with observations thus allowing the use of the model for assessing tidal stream resource in extended area.</p></div>","PeriodicalId":100705,"journal":{"name":"International Journal of Marine Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ijome.2016.08.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91726033","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 27

Dual mass system for enhancing energy extraction from Vortex-Induced Vibrations of a circular cylinder 提高圆柱涡激振动能量提取的双质量系统

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/j.ijome.2016.08.002

J. Xu-Xu, A. Barrero-Gil, A. Velazquez

引用次数: 19

The location of offshore wave power devices structures epifaunal assemblages 近海波浪能装置的位置构成了海底组合

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/j.ijome.2016.07.007

Olivia Langhamer

{"title":"The location of offshore wave power devices structures epifaunal assemblages","authors":"Olivia Langhamer","doi":"10.1016/j.ijome.2016.07.007","DOIUrl":"https://doi.org/10.1016/j.ijome.2016.07.007","url":null,"abstract":"<div><p>With large-scale development of offshore wave power conversion, artificial structures become more common in the open sea. To examine how wave power devices may be colonized by epifaunal organisms, 21 concrete foundations used for anchoring wave power generators were studied during two years, 2007 and 2008. The foundations were placed in two different clusters, located north and south within the Lysekil test site at the Swedish west coast. The degree to which early recruits covered the foundations and the succession of epibenthic communities were documented during two years. A succession in colonization over time was observed, with a higher degree of cover in the northern location. Furthermore, the northern location showed an increase in number of individuals, number of species and in Shannon-Wiener diversity in 2008. Dominant organisms on the foundations were the serpulid tubeworms (<em>Pomatoceros triqueter</em>) and barnacles (<em>Balanus</em> sp.). This comprehensive large-scale study about succession and colonization patterns on wave power foundations suggests that the location of wave energy devices affects colonization patterns. This gives indications on settlement patterns on already operating and planned offshore wave power parks further off the coasts.</p></div>","PeriodicalId":100705,"journal":{"name":"International Journal of Marine Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ijome.2016.07.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91761054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Coupled mooring analysis for floating wave energy converters using CFD: Formulation and validation 基于CFD的浮动波能转换器耦合系泊分析:公式与验证

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/j.ijome.2016.05.003

Johannes Palm , Claes Eskilsson , Guilherme Moura Paredes , Lars Bergdahl

引用次数: 101

Towards a practical resource assessment of the extractable energy in the Agulhas ocean current 对阿古拉斯海流中可提取能源的实际资源评估

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/J.IJOME.2016.05.010

I. Meyer, J. V. Niekerk

引用次数: 11

Experimental validation of the distributed drag method for simulating large marine current turbine arrays using porous fences 多孔栅模拟大型海流涡轮阵列分布阻力方法的实验验证

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/J.IJOME.2016.10.001

D. Coles, L. Blunden, A. Bahaj

引用次数: 9

Numerical prediction of the turbulent wakes generated by a row of marine turbines 一排船用涡轮机产生的湍流尾迹的数值预测

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/j.ijome.2016.05.004

Arturo Fernandez

引用次数: 3

Optimal Wells turbine speeds at different wave conditions 不同波浪条件下井式水轮机的最佳转速

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/J.IJOME.2016.05.008

Paresh Halder, A. Samad

引用次数: 28

A sensitivity analysis on tidal stream turbine loads caused by operational, geometric design and inflow parameters 操作、几何设计和入流参数对潮汐水轮机负荷的敏感性分析

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/j.ijome.2016.05.005

T.M. Nevalainen, C.M. Johnstone, A.D. Grant

{"title":"A sensitivity analysis on tidal stream turbine loads caused by operational, geometric design and inflow parameters","authors":"T.M. Nevalainen, C.M. Johnstone, A.D. Grant","doi":"10.1016/j.ijome.2016.05.005","DOIUrl":"10.1016/j.ijome.2016.05.005","url":null,"abstract":"<div><p><span>This paper presents a sensitivity analysis on a numerical tidal stream turbine model where a multitude of input parameters’ effect on the load output were determined. The statistical procedure used, known as the Morris method, provided insight into the interactions between the parameters as well as showing their comparative influence on the turbine loading. The investigation covered parameters from the operational, geometric design and inflow variable domains where the </span>rotor radius<span>, current shear, blade root pitch, surface velocity<span><span> and wave height were identified as most influential. The blade pitch was regarded as a surprisingly prominent influence on the loads. The turbine’s operating depth and the blade geometry were also found to be of limited influence in the ranges investigated. In terms of load transmission into the internal components of a turbine’s drive train, the rotor out-of-plane bending moment, or eccentric bending moment, was found to be a considerable contribution to the off-axis loads on the shaft. Therefore, special attention was paid to the input parameters’ relationship to the </span>eccentric load component by performing a detailed study on the load variations caused by the identified primary input parameters. It is concluded that performing a sensitivity analysis on a tidal stream turbine in a specific operating climate can yield insight to the expected load range and that the eccentric loading transmitted to the shaft is significant for most input cases.</span></span></p></div>","PeriodicalId":100705,"journal":{"name":"International Journal of Marine Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ijome.2016.05.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74449913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 21

Performance characterization of a cross-flow hydrokinetic turbine in sheared inflow 横流水动力涡轮在剪切入流中的性能表征

International Journal of Marine Energy Pub Date : 2016-12-01 DOI: 10.1016/j.ijome.2016.06.001

Dominic Forbush , Brian Polagye , Jim Thomson , Levi Kilcher , James Donegan , Jarlath McEntee

引用次数: 13