International Journal of Marine Energy最新文献_第5页

Wave energy resource evaluation and characterisation for the Libyan Sea 利比亚海波浪能资源评价与表征

International Journal of Marine Energy Pub Date : 2017-06-01 DOI: 10.1016/j.ijome.2017.03.001

George Lavidas , Vengatesan Venugopal

{"title":"Wave energy resource evaluation and characterisation for the Libyan Sea","authors":"George Lavidas , Vengatesan Venugopal","doi":"10.1016/j.ijome.2017.03.001","DOIUrl":"10.1016/j.ijome.2017.03.001","url":null,"abstract":"<div><p>The study focuses on a high resolution coastal assessment for the Libyan Sea at the South-West Mediterranean. To date majority of information for the area, are based on large scale oceanic models with coarse resolutions not adequate for nearshore assessments. This dataset and analysis provides an in-depth wave energy resource assessment and detail dissemination of sites according to their metocean characteristics. Identification for wave energy is based on the database constructed, allowing the quantification of energy levels and resource implications at sites.</p><p>Mean values of wave heights around the coastlines are <span><math><mrow><mo>≈</mo><mn>1</mn><mspace></mspace><mtext>m</mtext></mrow></math></span>, though high storm events exceed 5m at several areas. Highest wave energy resources are located at open coastal areas, with energetic months reaching up to 10kW/m. Low energy seasons are found throughout summer months, where energy content is reduced threefold. The resource can be classified as low, however the coefficient of variation suggests a predictable resource with extreme events not expected to surpass 10m.</p><p>Although, resource is not as energetic as open oceanic regions the low variations may assist wave energy as a supporting renewable energy option. Assessing the wave climate around the coasts for a long period of time can also provide confident and robust suggestions on the selection for wave energy converters. In addition, lower extreme events are expected to reduce potential installations costs by lowering structural expenditure and strengthening works to facilitate operation at milder environments.</p></div>","PeriodicalId":100705,"journal":{"name":"International Journal of Marine Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ijome.2017.03.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80894222","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: 17

Aims & Scope + Editorial Board (IFC) 目标与范围+编辑委员会(IFC)

International Journal of Marine Energy Pub Date : 2017-06-01 DOI: 10.1016/S2214-1669(17)30037-1

引用次数: 0

Tidal energy site characterization for marine turbine optimal installation: Case of the Ouessant Island in France 海洋涡轮机最佳安装潮汐能场地特征:以法国Ouessant岛为例

International Journal of Marine Energy Pub Date : 2017-06-01 DOI: 10.1016/j.ijome.2017.03.004

Tony El Tawil , Jean Frédéric Charpentier , Mohamed Benbouzid

引用次数: 30

A tuned actuator cylinder approach for predicting cross-flow turbine performance with wake interaction and channel blockage effects 考虑尾流相互作用和通道阻塞效应的跨流涡轮性能预测的调谐驱动缸方法

International Journal of Marine Energy Pub Date : 2017-06-01 DOI: 10.1016/j.ijome.2017.03.007

Michael Shives , Curran Crawford , Shane Grovue

{"title":"A tuned actuator cylinder approach for predicting cross-flow turbine performance with wake interaction and channel blockage effects","authors":"Michael Shives , Curran Crawford , Shane Grovue","doi":"10.1016/j.ijome.2017.03.007","DOIUrl":"10.1016/j.ijome.2017.03.007","url":null,"abstract":"<div><p>This article presents a practical method for predicting the power output of cross-flow tidal/river turbines with wake interaction and channel blockage effects. In a turbine farm, the power generated by each rotor depends on the cube of the local velocity, which is influenced by the bottom topology, by other turbines’ wakes and also by finite channel cross sectional areas restricting wake expansion. Therefore, the accuracy of power predictions depends strongly on proper modelling of rotor wakes and the influence of the channel/river boundaries. This is a critical issue for the tidal and river kinetic turbine power industries because best practise for predicting energy yield has yet to be established, while project revenue streams are primarily a function of yield.</p><p>This article introduces a simulation-based method to predict individual turbine and total farm power output with modest computational expense, named the <em>tuned actuator cylinder approach</em> (TACA). Rotors are represented in the simulations as momentum sink terms, using approximately 21 elements across their diameter, allowing for very fast simulations of multiple rotors. The model is tuned to match known (from experiments or high-fidelity blade-resolved simulation) thrust and power operational profiles for a particular turbine, with known inflow conditions. Once tuned, the TACA model can be applied to a wide range of turbine array configurations, and arbitrary flow environments. Thus, TACA is an appropriate tool for case-studies and/or optimization of turbine array layout at real-world tidal/river energy sites.</p></div>","PeriodicalId":100705,"journal":{"name":"International Journal of Marine Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ijome.2017.03.007","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72556275","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: 13

On the reversed LCOE calculation: Design constraints for wave energy commercialization 关于反向LCOE计算:波浪能商业化的设计约束

International Journal of Marine Energy Pub Date : 2017-06-01 DOI: 10.1016/j.ijome.2017.03.008

A. de Andres , E. Medina-Lopez , D. Crooks , O. Roberts , H. Jeffrey

{"title":"On the reversed LCOE calculation: Design constraints for wave energy commercialization","authors":"A. de Andres , E. Medina-Lopez , D. Crooks , O. Roberts , H. Jeffrey","doi":"10.1016/j.ijome.2017.03.008","DOIUrl":"10.1016/j.ijome.2017.03.008","url":null,"abstract":"<div><p>The purpose of this work is to provide an innovative tool based on the classic Levelised Cost of Energy (LCOE) which gives an overview of the limits for the technical parameters of Wave Energy Converters (WECs). In this case, the LCOE calculation procedure is reversed: the LCOE target is set in the first instance, followed by the calculation of the Average Energy Production (AEP) based on different scenarios. Then, the Capital and Operating Expenditures (CAPEX and OPEX) are calculated and percentages per cost centre are assigned in order to find the cost of each technical parameter, e.g. the structure, Power Take-Off (PTO), connections, mooring and installation costs. With this reversed LCOE the upper costs limits for a WEC were obtained. Moreover, an approximation of parameters such as the maximum mass of steel, mooring length or number of interventions per year are given. Five WECs classes are analysed in this paper: Oscillating Water Column (OWC), overtopping devices, heaving devices, fixed Oscillating Wave Surge Converter (OWSC) and floating OWSC. An extensive comparison with actual devices is made. Finally, a comparison with the limits in the Offshore Wind Energy sector is given as a check of the cost-reduction potential of Wave Energy. As a conclusion, although in a primary stage of development, commercial WEC projects have the potential to be competitive with the Offshore Wind Energy industry.</p></div>","PeriodicalId":100705,"journal":{"name":"International Journal of Marine Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ijome.2017.03.008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72877813","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: 62

Bidirectional air turbines for oscillating water column systems: Fast selection applying turbomachinery scaling laws 振荡水柱系统的双向空气涡轮机:应用涡轮机械标度规律的快速选择

International Journal of Marine Energy Pub Date : 2017-06-01 DOI: 10.1016/j.ijome.2017.03.006

Thomas H. Carolus, Christoph Moisel

{"title":"Bidirectional air turbines for oscillating water column systems: Fast selection applying turbomachinery scaling laws","authors":"Thomas H. Carolus, Christoph Moisel","doi":"10.1016/j.ijome.2017.03.006","DOIUrl":"10.1016/j.ijome.2017.03.006","url":null,"abstract":"<div><p>The collector of an oscillating water column system (OWC) for wave energy utilization requires a bidirectional turbine that copes with pneumatic power while providing specified impedance or, in terms of an OWC designer, “damping”. Damping is realized by keeping to a specific flow rate through the turbine at a given pressure head due to the individual performance characteristic of the turbine. With the number of turbine designs increasing designers of OWC systems are facing more options to select and dimension a bidirectional turbine. Energy yield, size and hence cost of the turbine and electric generator, operational behaviour, envisaged control strategy and noise emitted by the turbine are possible criteria for selection.</p><p>The primary objective of this paper is to describe a simple procedure for making a first choice of a turbine for a particular OWC application. Here we confine ourselves to a family of reaction type of turbines (axial-flow Wells and mixed-flow turbines by Moisel) with their approximately linear pressure head/volume flow rate characteristics. Starting point is the set of non-dimensional steady-state characteristics of each turbine in the family. Utilizing standard scaling laws and a very simple time domain model for the cyclic turbine operation (i.e. based one single sea state and turbine operation assumed to be fixed rotational speed), first estimates of turbine size and rotor speed, number for stages or flows, and performance curves can be determined. The resulting turbine may also serve as a starting configuration for a refined analysis, e.g. the optimization of the turbine and the complete OWC system, utilizing more complex stochastic models. Three case studies illustrate the application of the method: selection and scaling of turbines, effect of collector parameters, turbines in series and parallel.</p></div>","PeriodicalId":100705,"journal":{"name":"International Journal of Marine Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ijome.2017.03.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72928375","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: 3

Design diagrams for wavelength discrepancy in tank testing with inconsistently scaled intermediate water depth 中间水深比例不一致的水箱试验中波长差异的设计图

International Journal of Marine Energy Pub Date : 2017-06-01 DOI: 10.1016/j.ijome.2017.04.001

Donald R. Noble , Samuel Draycott , Thomas A.D. Davey , Tom Bruce

引用次数: 8

Towards a cost-based design of heaving point absorbers 基于成本的升沉点减震器设计

International Journal of Marine Energy Pub Date : 2017-06-01 DOI: 10.1016/j.ijome.2017.03.005

V. Piscopo , G. Benassai , R. Della Morte , A. Scamardella

{"title":"Towards a cost-based design of heaving point absorbers","authors":"V. Piscopo , G. Benassai , R. Della Morte , A. Scamardella","doi":"10.1016/j.ijome.2017.03.005","DOIUrl":"10.1016/j.ijome.2017.03.005","url":null,"abstract":"<div><p>The need for increasing the share of sea resources in the global renewable energy market requires a specialized design of wave energy converters and Power Take-Off units that, in turn, may be capable of maximising power production and minimizing extraction costs. In this respect, as optimization of wave energy converter performances, by properly tuning relevant hydrodynamic parameters and controlling the motion in waves, reveals a basic issue to reduce energy production charges, a new cost-based design procedure for heaving point absorber type devices is developed, with the main aim of accounting for wave climate at deployment site, reliable device operational profiles and design restraint criteria for both floating buoy and Power Take-Off unit. The newly proposed cost-based procedure is applied to detect the optimum configuration of heaving point absorber devices at several candidate deployment sites. Finally, the incidence of wave climate and available energy resources, on detecting the optimum device configuration and assessing relevant energy production costs, is investigated and fully discussed.</p></div>","PeriodicalId":100705,"journal":{"name":"International Journal of Marine Energy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.ijome.2017.03.005","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77975193","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: 7

Wave energy extraction in Scotland through an improved nearshore wave atlas 通过改进的近岸波浪图集提取苏格兰的波浪能

International Journal of Marine Energy Pub Date : 2017-04-01 DOI: 10.1016/j.ijome.2017.01.008

George Lavidas, Vengatesan Venugopal, Daniel Friedrich

引用次数: 33

Numerical modeling of turbulence and its effect on ocean current turbines 湍流数值模拟及其对海流涡轮的影响

International Journal of Marine Energy Pub Date : 2017-04-01 DOI: 10.1016/j.ijome.2017.01.001

Parakram Pyakurel , James H. VanZwieten , Manhar Dhanak , Nikolaos I. Xiros

引用次数: 28