scholarly journals Wind Turbine Shutdowns and Upgrades in Denmark: Timing Decisions and the Impact of Government Policy

2020 ◽  
Vol 41 (3) ◽  
Author(s):  
Jonathan A. Cook ◽  
C.-Y. Cynthia Lin Lawell
Keyword(s):  
Wind Turbine ◽  
Government Policy ◽  
Timing Decisions ◽  
The Impact

The ‘Modernisation’ of Scotland and its Impact on Glasgow, 1955–1979: ‘Unwanted Side Effects’ and Vulnerabilities

2016 ◽  
Vol 25 (3) ◽  
pp. 294-316 ◽  
Author(s):  
Chik Collins ◽  
Ian Levitt
Keyword(s):  
Side Effects ◽  
Government Policy ◽  
Regional Policy ◽  
Excess Mortality ◽  
Policy Agenda ◽  
Policy Makers ◽  
Uk Government ◽  
1960S And 1970S ◽  
The 1960S ◽  
The Impact

This article reports findings of research into the far-reaching plan to ‘modernise’ the Scottish economy, which emerged from the mid-late 1950s and was formally adopted by government in the early 1960s. It shows the growing awareness amongst policy-makers from the mid-1960s as to the profoundly deleterious effects the implementation of the plan was having on Glasgow. By 1971 these effects were understood to be substantial with likely severe consequences for the future. Nonetheless, there was no proportionate adjustment to the regional policy which was creating these understood ‘unwanted’ outcomes, even when such was proposed by the Secretary of State for Scotland. After presenting these findings, the paper offers some consideration as to their relevance to the task of accounting for Glasgow's ‘excess mortality’. It is suggested that regional policy can be seen to have contributed to the accumulation of ‘vulnerabilities’, particularly in Glasgow but also more widely in Scotland, during the 1960s and 1970s, and that the impact of the post-1979 UK government policy agenda on these vulnerabilities is likely to have been salient in the increase in ‘excess mortality’ evident in subsequent years.

scholarly journals Impact of the Wind Turbine on the Parameters of the Electricity Supply to an Agricultural Farm

2021 ◽  
Vol 13 (13) ◽  
pp. 7279
Author(s):  
Zbigniew Skibko ◽  
Magdalena Tymińska ◽  
Wacław Romaniuk ◽  
Andrzej Borusiewicz
Keyword(s):  
Power Plant ◽  
Wind Turbine ◽  
Wind Power ◽  
Rural Areas ◽  
Power Plants ◽  
Reactive Power ◽  
Supply Voltage ◽  
Common Source ◽  
Voltage Fluctuations ◽  
The Impact

Wind power plants are an increasingly common source of electricity located in rural areas. As a result of the high variability of wind power, and thus the generated power, these sources should be classified as unstable sources. In this paper, the authors attempted to determine the impact of wind turbine operation on the parameters of electricity supplied to farms located near the source. As a result of the conducted field tests, variability courses of the basic parameters describing the supply voltage were obtained. The influence of power plant variability on the values of voltage, frequency, and voltage distortion factor was determined. To estimate the capacity of the transmission lines, the reactive power produced in the power plant and its effect on the value of the power factor were determined. The conducted research and analysis showed that the wind power plant significantly influences voltage fluctuations in its immediate vicinity (the maximum value registered was close to 2%, while the value required by law was 2.5%). Although all the recorded values are within limits specified by the current regulations (e.g., the THD value is four times lower than the required value), wind turbines may cause incorrect operation of loads connected nearby. This applies mainly to cases where consumers sensitive to voltage fluctuations are installed in the direct vicinity of the power plant.

Dynamics of the Gear Train Set in Wind Turbine

2011 ◽  
Vol 697-698 ◽  
pp. 701-705
Author(s):  
D.D. Ji ◽  
Y.M. Song ◽  
J. Zhang
Keyword(s):  
Wind Turbine ◽  
Dynamic Model ◽  
Harmonic Balance Method ◽  
Planetary Gear ◽  
Gear Train ◽  
Dynamic Responses ◽  
Multi Stage ◽  
Lumped Parameter ◽  
Cartesian Coordinate ◽  
The Impact

A lumped-parameter dynamic model for gear train set in wind turbine is proposed to investigate the dynamics of the speed-increasing gear box. The proposed model is developed in a universal Cartesian coordinate, which includes transversal and torsional deflections of each component, time-varying mesh stiffness, gear profile errors and external excitations. By solving the dynamic model, a modal analysis is performed. The results indicate that the modal properties of the multi-stage gear train in wind turbine are similar to those of a single-stage planetary gear set. A harmonic balance method (HBM) is used to obtain the dynamic responses of the gearing system. The responses give insight into the impact of excitations on the vibrations.

Design and analysis of a segmented blade for a 50 MW wind turbine rotor

2022 ◽  
pp. 0309524X2110693
Author(s):  
Alejandra S Escalera Mendoza ◽  
Shulong Yao ◽  
Mayank Chetan ◽  
Daniel Todd Griffith
Keyword(s):  
Wind Turbine ◽  
Large Mass ◽  
Turbine Rotor ◽  
Bolted Joints ◽  
Bonded Joints ◽  
Sheer Size ◽  
Extreme Scale ◽  
The Impact ◽  
Adhesive Materials ◽  
Wind Turbine Rotor

Extreme-size wind turbines face logistical challenges due to their sheer size. A solution, segmentation, is examined for an extreme-scale 50 MW wind turbine with 250 m blades using a systematic approach. Segmentation poses challenges regarding minimizing joint mass, transferring loads between segments and logistics. We investigate the feasibility of segmenting a 250 m blade by developing design methods and analyzing the impact of segmentation on the blade mass and blade frequencies. This investigation considers various variables such as joint types (bolted and bonded), adhesive materials, joint locations, number of joints and taper ratios (ply dropping). Segmentation increases blade mass by 4.1%–62% with bolted joints and by 0.4%–3.6% with bonded joints for taper ratios up to 1:10. Cases with large mass growth significantly reduce blade frequencies potentially challenging the control design. We show that segmentation of an extreme-scale blade is possible but mass reduction is necessary to improve its feasibility.

scholarly journals The Impact of Food and Nutrient-Based Standards on Primary School Children’s Lunch and Total Dietary Intake: A Natural Experimental Evaluation of Government Policy in England

PLoS ONE ◽  
2013 ◽  
Vol 8 (10) ◽  
pp. e78298 ◽  
Author(s):  
Suzanne Spence ◽  
Jennifer Delve ◽  
Elaine Stamp ◽  
John N. S. Matthews ◽  
Martin White ◽  
...  
Keyword(s):  
Dietary Intake ◽  
Primary School ◽  
Government Policy ◽  
Experimental Evaluation ◽  
The Impact

scholarly journals Tourist Viewshed Externalities and Wind Energy Production

2017 ◽  
Vol 46 (2) ◽  
pp. 224-241 ◽  
Author(s):  
Jacob R. Fooks ◽  
Kent D. Messer ◽  
Joshua M. Duke ◽  
Janet B. Johnson ◽  
Tongzhe Li ◽  
...  
Keyword(s):  
Wind Energy ◽  
Wind Turbine ◽  
Wind Turbines ◽  
Energy Production ◽  
Hotel Room ◽  
Negative Effect ◽  
The Impact ◽  
Large Wind

This study uses an experiment where ferry passengers are sold hotel room “views” to evaluate the impact of wind turbines views on tourists’ vacation experience. Participants purchase a chance for a weekend hotel stay. Information about the hotel rooms was limited to the quality of the hotel and its distance from a large wind turbine, as well as whether or not a particular room would have a view of the turbine. While there was generally a negative effect of turbine views, this did not hold across all participants, and did not seem to be effected by distance or hotel quality.

scholarly journals Choosing a nursing career: Building an indigenous nursing workforce

2017 ◽  
Vol 6 (5) ◽  
pp. 27 ◽  
Author(s):  
Linda Deravin ◽  
Karen Francis ◽  
Judith Anderson
Keyword(s):  
Health Outcomes ◽  
Government Policy ◽  
Health Workforce ◽  
Indigenous Health ◽  
Nursing Workforce ◽  
South Wales ◽  
Closing The Gap ◽  
Nursing Career ◽  
National Partnership ◽  
The Impact

Introduction: This paper provides an overview of the impact of government policy in supporting the growth of an Indigenous nursing workforce in New South Wales and Australia.Methods: Publically available nursing workforce performance reports along with current literature were reviewed to provide a perspective on the current situation.Results and discussion: The National partnership agreement on closing the gap in Indigenous health outcomes indicated that to improve Indigenous health outcomes, significant investment is required with particular reference to increasing an Indigenous workforce. As nurses comprise the majority of the health workforce a number of strategies and initiatives have been put in place to support this agreement. Even though there has been commitment through government policy and funding initiatives it is questionable if this is having any real impact on growing an Indigenous nursing workforce.Conclusions: Recruitment strategies that will increase the number of Indigenous nurses within the health workforce requires a multilevel approach. Despite efforts to increase Indigenous nursing workforce numbers, there has been limited impact to any real successful gains since 2008. Building and growing an Indigenous nursing workforce that will support the “Closing the Gap” initiative will require significant continuing effort.

scholarly journals The Effect of Government Policy on Housing Delivery in Nigeria: A Case Study of Port Harcourt Low Income Housing Programme

2015 ◽  
Vol 61 ◽  
pp. 87-98 ◽  
Author(s):  
John Owuike Iheme ◽  
James Bassey Effiong ◽  
Samuel Bassey Ekung
Keyword(s):  
Low Income ◽  
Government Policy ◽  
Income Group ◽  
Mortgage Market ◽  
Government Policies ◽  
Survey Method ◽  
Related Factors ◽  
High Interest Rate ◽  
Housing Needs ◽  
The Impact

Housing is one of the most important needs of individuals next to food and clothing. Housing needs for low income earners has reached an alarming stage in Nigeria. On the supply side, numerous government policies have earlier aimed at disabling the massive shortage through numerous housing reform programmes. Despite these preceding efforts, housing remains an illusion to an average Nigerian. This research assessed the effect of government policy on housing delivery in Nigeria. The objectives were to determine housing needs of the low income group in Nigeria and to determine the impact of government policies on affordable housing provision to the low income group. Survey method was used to collect data from 44 respondents through the administration of questionnaires which was analyzed with statistical tools. The findings from the study shows that insufficient fund is closely related to other finance related factors identified as barriers to the accessibility of public housing by the low income group who are non-public servants. Such factors as high interest rate, low per capita income, lack of security of income, lack of collateral and high cost of public houses. The study suggest the creation of a viable secondary mortgage market, improvement of land registration and allocation, compassionate urban renewal programmes, cost saving house designs amongst others.

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