Wind turbine rank method for a wind park scenario

2016 ◽  
Vol 13 (6) ◽  
pp. 500-508 ◽  
Author(s):  
Mohd Zamri Ibrahim ◽  
Aliashim Albani
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Capital Cost ◽  
Capacity Factor ◽  
Content Type ◽  
Case Study Site ◽  
Wind Park ◽  
A Site ◽  
Turbine Installation

Purpose This paper aims to present a method of the wind turbine ranking, either stall or pitch-regulated wind turbine (WTG), to determine the suitability of wind turbine in a selected site. Design/methodology/approach The method included the wind park target capacity, the maximum hub-height, the standard rotor diameter and the characteristic of wind speed on the site. As the method had been applied to a wind park, with more than one wind turbine, the wake losses had been considered by subtracting the gross capacity factor. Besides, the turbine-site matching index (TSMI) was computed by dividing the net capacity factor with the total installed capital cost per kilowatt. Findings The components of the total installed capital cost were cost of turbine, installation, as well as operation and maintenance. Meanwhile, the target capacity index (TCI) was calculated by dividing the estimated wind park capacity with the target wind park capacity. Originality/value Both TSMI and TCI were used together to rank the wind turbines. Furthermore, a site in the eastern part of Kudat was selected as the case study site, where ten models of wind turbines were tested and ranked.

World Heritage site as a label in branding a place

2015 ◽  
Vol 5 (3) ◽  
pp. 210-223 ◽  
Author(s):  
Azizul Hassan ◽  
Mizan Rahman
Keyword(s):  
World Heritage ◽  
World Heritage Site ◽  
Case Study Method ◽  
Demand And Supply ◽  
Content Type ◽  
Heritage Site ◽  
The Status ◽  
Case Study Site ◽  
A Site

Purpose – The purpose of this paper is to argue that the World Heritage Site (WHS) status as a label plays an important role in branding, creating awareness among the tourists and promoting a specific place – be it natural or cultural. Design/methodology/approach – The study is based on qualitative research and utilised interviews and explanatory case study method, taking Maritime Greenwich WHS as a case. Findings – It is found that the status of WHS motivates the tourists in general and heritage tourists in particular to visit the case study site. Also, the status helps in boosting the level of confidence of the tourists while selecting the site. Overall, it helps to reinforce the identity of a place. However, sustainability and conservation should not take a back seat when the very purpose of branding a site as WHS is this. Originality/value – It is ideal to have a balance in managing the demand and supply side of place management and marketing making sure that the heritage value and trust is kept intact.

scholarly journals Impact of Typhoons on Floating Offshore Wind Turbines: A Case Study of Typhoon Mangkhut

2021 ◽  
Vol 9 (5) ◽  
pp. 543
Author(s):  
Jiawen Li ◽  
Jingyu Bian ◽  
Yuxiang Ma ◽  
Yichen Jiang
Keyword(s):  
Wind Turbine ◽  
Wind Turbines ◽  
Safety Evaluation ◽  
Offshore Wind ◽  
Offshore Wind Turbine ◽  
Motion Response ◽  
Offshore Wind Turbines ◽  
Floating Offshore Wind Turbines ◽  
Coupling Motion

A typhoon is a restrictive factor in the development of floating wind power in China. However, the influences of multistage typhoon wind and waves on offshore wind turbines have not yet been studied. Based on Typhoon Mangkhut, in this study, the characteristics of the motion response and structural loads of an offshore wind turbine are investigated during the travel process. For this purpose, a framework is established and verified for investigating the typhoon-induced effects of offshore wind turbines, including a multistage typhoon wave field and a coupled dynamic model of offshore wind turbines. On this basis, the motion response and structural loads of different stages are calculated and analyzed systematically. The results show that the maximum response does not exactly correspond to the maximum wave or wind stage. Considering only the maximum wave height or wind speed may underestimate the motion response during the traveling process of the typhoon, which has problems in guiding the anti-typhoon design of offshore wind turbines. In addition, the coupling motion between the floating foundation and turbine should be considered in the safety evaluation of the floating offshore wind turbine under typhoon conditions.

scholarly journals Optimum Selection of Wind Turbines Using Normalized Power and Capacity Factor Curves

2021 ◽  
pp. 2813-2823
Author(s):  
Firas A. Hadi ◽  
Zaid F. Makki ◽  
Rafa A. Al-Baldawi
Keyword(s):  
Wind Turbine ◽  
Performance Index ◽  
Shape Parameter ◽  
Parameters Estimation ◽  
Capacity Factor ◽  
Turbine Performance ◽  
Optimum Selection ◽  
Novel Method ◽  
A Site ◽  
Selection Of

The main objective of this paper is present a novel method to choice a certain wind turbine for a specific site by using normalized power and capacity factor curves. The site matching is based on identifying the optimum turbine rotation speed parameters from turbine performance index (TPI) curve, which is obtained from the higher values of normalized power and capacity factor curves. Wind Turbine Performance Index a new ranking parameter, is defined to optimally match turbines to wind site. The relations (plots) of normalized power, capacity factor, and turbine performance index versus normalized rated wind speed are drawn for a known value of Weibull shape parameter of a site, thus a superior method is used for Weibull parameters estimation which is called Equivalent Energy Method (EEM).

Using RBM approach in managing projects beyond the development sector

2016 ◽  
Vol 9 (2) ◽  
pp. 337-363 ◽  
Author(s):  
Joseph Kaggwa Ssegawa ◽  
Mark Muzinda
Keyword(s):  
Project Delivery ◽  
Technology Infrastructure ◽  
Content Type ◽  
Information Technology Infrastructure ◽  
Analysis Technique ◽  
Included Review ◽  
Project Data ◽  
A Site ◽  
Practical Implications

Purpose – Result-based management (RBM) is common approach used in the development sector to initiate, plan and implement projects. However, to the knowledge of the authors the approach has hardly been used in delivering projects in other sectors, for example, information technology, infrastructure or business. The purpose of this paper is to document a case study in which the RBM approach was used to guide the delivery of a business project in Botswana. Design/methodology/approach – A case study strategy was used to document the delivery process of the project. Data were collected from a variety of sources that included review of documents, interviews, focus discussions and a site visit. The content analysis technique was used to analyse the collected data. Findings – The case illustrates the possibility of using the RBM approach to initiate, plan and implement a project in the business sector. Research limitations/implications – Being a case study, the approach needs to be tested with more case studies. Practical implications – Apart from illustrating the possible use of RBM approach, the paper illustrates systematic processes used in the case study for project delivery. It also outlines some of the resultant challenges which may be appreciated by practitioners, academics and trainees. Originality/value – The use of RBM approach in guiding the delivery of a business project.

scholarly journals Simultaneous Inertia Contribution and Optimal Grid Utilization with Wind Turbines

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3013 ◽  
Author(s):  
Clemens Jauch ◽  
Arne Gloe
Keyword(s):  
Power Systems ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Power Plants ◽  
Frequency Control ◽  
Negative Consequences ◽  
Realistic Case ◽  
System Utilization ◽  
Continuous Feed

This paper presents findings of a study on continuous feed-in management and continuous synthetic inertia contribution with wind turbines. A realistic case study, based on real measurements, is outlined. A wind turbine feeds into a weak feeder, such that its power has to be adapted to the permissible loading of this feeder. At the same time the wind turbine is to provide inertia to the grid by applying the previously published variable inertia constant controller. It is discussed that optimal grid utilization and simultaneous inertia contribution are mandatory for the frequency control in power systems that are heavily penetrated with renewable energies. The study shows that continuous feed-in management can be combined well with continuous inertia provision. There are hardly any negative consequences for the wind turbine. The benefits for the grid are convincing, both in terms of increased system utilization and in terms of provided inertia. It is concluded that wind turbines can enhance angular stability in a power system to a larger extent than conventional power plants.

scholarly journals Fault Tolerant Control of Internal Faults in Wind Turbine: Case Study of Gearbox Efficiency Decrease

2018 ◽  
Vol 2018 ◽  
pp. 1-8 ◽  
Author(s):  
Younes Ait El Maati ◽  
Lhoussain El Bahir ◽  
Khalid Faitah
Keyword(s):  
Steady State ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Operating Point ◽  
Rotor Speed ◽  
Integral Term ◽  
Internal Faults

This paper presents a method to control the rotor speed of wind turbines in presence of gearbox efficiency fault. This kind of faults happens due to lack of lubrication. It affects the dynamic of the principal shaft and thus the rotor speed. The principle of the fault tolerant control is to find a bloc that equalizes the dynamics of the healthy and faulty situations. The effectiveness decrease impacts on not only the dynamics but also the steady state value of the rotor speed. The last reason makes it mandatory to add an integral term on the steady state error to cancel the residual between the measured and operating point rotor speed. The convergence of the method is proven with respect to the rotor parameters and its effectiveness is evaluated through the rotor speed.

Personalisation in children’s social work: from family support to “the child’s budget”

2015 ◽  
Vol 23 (5) ◽  
pp. 277-286 ◽  
Author(s):  
Emilie Morwenna Whitaker
Keyword(s):  
Family Support ◽  
Social Care ◽  
Content Type ◽  
Team Members ◽  
Ethnographic Studies ◽  
The Social ◽  
Case Study Site ◽  
Individualised Care ◽  
And Control

Purpose – The purpose of this paper is to explore the changing meaning of personalisation from the New Labour era of bespoke, integrated family support to the more recent implementation of personal budgets for disabled children to deliver “choice and control”. The paper explores the discursive change from early help to “intervention”, the shifting conceptualisation of parents and the turn away from family support towards a focus upon individualised commissioning to meet needs. Design/methodology/approach – In addition to a literature review of policy shifts, findings presented are taken from an ethnographic case study of one team of children’s disability social workers. Observations were undertaken of the team in the office space and at meetings, in addition interviews were conducted with all team members and with seven families. An interpretivist and qualitative approach was adopted throughout. Findings – Findings reveal the frontline and familial challenges of delivering choice and control in a climate of austerity and child-centricism. Salient points for integration around families and between organisations as personalisation narrows in scope are also considered. Research limitations/implications – Findings are taken from one case study site; further research in different sites is required to consider the array of understandings and experiences across the social care landscape and to provide a strong empirical baseline. Originality/value – The paper reports on one of the first ethnographic studies of personalisation in children’s services. The paper is of value to practitioners and managers in social care and the NHS. It is also of value to academics exploring the conceptual and practical issues of individualised care.

scholarly journals Assessing the Factors Impacting on the Reliability of Wind Turbines via Survival Analysis—A Case Study

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3034 ◽  
Author(s):  
Samet Ozturk ◽  
Vasilis Fthenakis ◽  
Stefan Faulstich
Keyword(s):  
Survival Analysis ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Direct Drive ◽  
Maintenance Costs ◽  
Electrical Systems ◽  
Geographical Factors ◽  
History Of ◽  
Risk Rate

The failure of wind turbines is a multi-faceted problem and its monetary impact is often unpredictable. In this study, we present a novel application of survival analysis on wind turbine reliability, including accounting for previous failures and the history of scheduled maintenance. We investigated the operational, climatic and geographical factors that affect wind turbine failure and modeled the risk rate of wind turbine failure based on data from 109 turbines in Germany operating for a period of 19 years. Our analysis showed that adequately scheduled maintenance can increase the survival of wind turbine systems and electric subsystems up to 2.8 and 3.8 times, respectively, compared to the systems without scheduled maintenance. Geared-drive wind turbines and their electrical systems were observed to have 1.2- and 1.4- times higher survival, respectively, compared to direct-drive turbines and their electrical systems. It was also found that the survival of frequently-failing wind turbine components, such as switches, was worse in geared-drive than in direct-drive wind turbines. We show that survival analysis is a useful tool to guide the reduction of the operating and maintenance costs of wind turbines.

Wind tunnel and numerical study of multi-storey vertical axis wind turbines with different configurations

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Abhijeet M. Malge ◽  
Prashant Maruti Pawar
Keyword(s):  
Wind Tunnel ◽  
Wind Turbine ◽  
Wind Power ◽  
Wind Turbines ◽  
Numerical Study ◽  
Research Work ◽  
Vertical Axis ◽  
Power Coefficient ◽  
Content Type ◽  
Vertical Axis Wind Turbines

Purpose Three different configurations of vertical axis wind turbines (VAWT) were fabricated by changing the storey height and their orientations. The purpose of this study is to find the effect of storey height and orientation on the performance of wind turbines. The multistory VAWT has three storeys. The first configuration had increased middle storey height, with 0–90-0 orientation of blades. Wherein the second turbine had equal storey heights. The third configuration had increased middle storey height with 0–120-240 orientation of blades. The blades were tested numerically and experimentally. Design/methodology/approach In this research work, prototypes of innovative multistory VAWT were built with different configurations and orientations. Three configurations of three-storey VAWT were fabricated by varying the height of storey of turbines. The orientations were made by keeping the storeys orthogonal to each other. Multistory VAWT was tested numerically and experimentally. ANSYS Fluent was used for computational fluid dynamic analysis of VAWT. K-epsilon model was used for numerical analysis of wind turbine. Experimentation was carried out in a wind tunnel for different tip speed ratios (TSR). Findings The three configurations of innovative multistory VAWT were tested numerically and experimentally for different TSR. It has been found that the VAWT with equal storey height had a better performance as compared to the other two configurations with increased middle storey height. The power coefficient of equal storey height VAWT was about 22%, wherein the power coefficient of turbines with reduced upper and lower storey height was between 5%–8% Research limitations/implications The research work of multi-storey VAWT is very novel and original. The findings of the research will contribute to the existing work done in the field of VAWT. This will help other researchers to have insight into the development of multistory VAWT. The effect of storey height and configuration of multi-storey VAWT is studied numerically and experimentally, which concludes that the performance of equal storey is superior as compared to other configurations. Practical implications The multi-storey concept of VAWT was developed to counter the problem of wind direction. The blades of each storey were arranged orthogonal to each other. This helped to harness wind power irrespective of the direction of the wind. This will make the VAWT more sustainable and financially viable for domestic use. Social implications The turbines are specially designed for remotely located housed in rural areas where the power grid is not yet reached. Users can install the turbine on their rooftop and harness wind power of 100 W capacity. This will help them to make their life easy. Originality/value This research work is very original and first of a kind. The multistory concept of the wind turbine was checked for the effect of storey height and orientations of blades on its performance. Different configurations and orientations of the vertical axis were designed and developed for the first time.

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