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Urban vindkraft - Dagens kunskapsläge

Olenmark, Mikael and Christiansson, Sophia (2009)
Civil Engineering - Architecture (BSc)
Abstract
For a successful project of urban wind power requires wind as well as attachments, sound level and the requirements and regulations should be taken under consideration. But a lot of experience is still lacking and many projects fail therefore. This report covers the aspects described above and a summary of experiences and knowledge gaps have been made with the aim of facilitating the planning phase. Wind conditions in urban environment are complex and most windmodeling programs are designed for large-scale wind power. Since the wind is the factor which determines whether an investment in wind power is profitable or not it is important to try to predict. The method which we believe is most suitable for urban wind conditions is described in... (More)
For a successful project of urban wind power requires wind as well as attachments, sound level and the requirements and regulations should be taken under consideration. But a lot of experience is still lacking and many projects fail therefore. This report covers the aspects described above and a summary of experiences and knowledge gaps have been made with the aim of facilitating the planning phase. Wind conditions in urban environment are complex and most windmodeling programs are designed for large-scale wind power. Since the wind is the factor which determines whether an investment in wind power is profitable or not it is important to try to predict. The method which we believe is most suitable for urban wind conditions is described in the chapter Hanberäkningsmodell för vind och höjd över tak. The method is approximate but gives a good starting point for the determination of wind and placement. Even if a wind turbine has the perfect wind conditions and the ability to produce large amounts of energy it may not run if the sound level is too high. It is therefore important that the audio data is known and that it is reliable. In the case of attachments, between the wind turbine and the structure, it is established that it is an important aspect to consider in order to prevent structure-borne sound, vibrations and to avoid damage in the building shell. However, there are no rules of thumb because the attachments must be designed specifically for each case as the conditions differ for different houses. There are a variety of rules to be followed and requirements to be met in order for a wind turbine to be fitted. Therefore the contents of a building permit application, rules for connecting to the grid and guideline for the noise from wind turbines are brought into context. Requirements for shading, flicker and reflexes and technical requirements are also addressed. Data on energy production from urban wind turbines are currently inadequate. Therefore it’s not possible to draw any definitive conclusions about their effectiveness. However, it is unlikely that urban wind power ever will reach the same yield as large-scale wind power because the wind resources in urban environment aren’t as favorable. On the other hand, urban wind power is still in its development. This means that costs will be reduced and efficiency will improve. If the proposals on net metering and change of double subscription and the cost of the management of hourly measurement are approved by parliament, this would further enhance the prospects of the urban wind power to become more profitable. If aspects such as choice of location, height and position on the roof, the attachment and acoustics are not considered from the beginning, it has been shown that wind turbines frequently becomes entirely misplaced and hardly produces any energy or causes too much disturbance and are forced to shut down. If you want to invest in urban wind power you should be certain that the conditions are right by making a thorough planning, in other words, make it right from the beginning. (Less)
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author
Olenmark, Mikael and Christiansson, Sophia
organization
year
type
M2 - Bachelor Degree
subject
keywords
hawt, vindmodellering, vindkraft, urban, småskalig, vawt, uwt
language
Swedish
id
1464587
date added to LUP
2009-08-19 00:00:00
date last changed
2018-10-18 10:07:34
@misc{1464587,
  abstract     = {For a successful project of urban wind power requires wind as well as attachments, sound level and the requirements and regulations should be taken under consideration. But a lot of experience is still lacking and many projects fail therefore. This report covers the aspects described above and a summary of experiences and knowledge gaps have been made with the aim of facilitating the planning phase. Wind conditions in urban environment are complex and most windmodeling programs are designed for large-scale wind power. Since the wind is the factor which determines whether an investment in wind power is profitable or not it is important to try to predict. The method which we believe is most suitable for urban wind conditions is described in the chapter Hanberäkningsmodell för vind och höjd över tak. The method is approximate but gives a good starting point for the determination of wind and placement. Even if a wind turbine has the perfect wind conditions and the ability to produce large amounts of energy it may not run if the sound level is too high. It is therefore important that the audio data is known and that it is reliable. In the case of attachments, between the wind turbine and the structure, it is established that it is an important aspect to consider in order to prevent structure-borne sound, vibrations and to avoid damage in the building shell. However, there are no rules of thumb because the attachments must be designed specifically for each case as the conditions differ for different houses. There are a variety of rules to be followed and requirements to be met in order for a wind turbine to be fitted. Therefore the contents of a building permit application, rules for connecting to the grid and guideline for the noise from wind turbines are brought into context. Requirements for shading, flicker and reflexes and technical requirements are also addressed. Data on energy production from urban wind turbines are currently inadequate. Therefore it’s not possible to draw any definitive conclusions about their effectiveness. However, it is unlikely that urban wind power ever will reach the same yield as large-scale wind power because the wind resources in urban environment aren’t as favorable. On the other hand, urban wind power is still in its development. This means that costs will be reduced and efficiency will improve. If the proposals on net metering and change of double subscription and the cost of the management of hourly measurement are approved by parliament, this would further enhance the prospects of the urban wind power to become more profitable. If aspects such as choice of location, height and position on the roof, the attachment and acoustics are not considered from the beginning, it has been shown that wind turbines frequently becomes entirely misplaced and hardly produces any energy or causes too much disturbance and are forced to shut down. If you want to invest in urban wind power you should be certain that the conditions are right by making a thorough planning, in other words, make it right from the beginning.},
  author       = {Olenmark, Mikael and Christiansson, Sophia},
  keyword      = {hawt,vindmodellering,vindkraft,urban,småskalig,vawt,uwt},
  language     = {swe},
  note         = {Student Paper},
  title        = {Urban vindkraft - Dagens kunskapsläge},
  year         = {2009},
}