Economics of wind energy

Mathew, Sathyajith

doi:10.1007/3-540-30906-3_7

Cited by 30 publications

(29 citation statements)

References 3 publications

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“…The captured kinetic wind power depends on the air density ρ, swept area of the rotor A and the wind speed v at hub height h . 21 Average wind speed at hub height depends on height ( h ), swept area A , and wind shear n . As a general rule a vertical wind shear gradient described by the Hellman exponent of 1/7 is applied, which is at the lower range of wind shear gradients reported in the literature (between 0.15 and 0.25 for onshore regions).…”

Section: Methodsmentioning

confidence: 99%

Wind Power Electricity: The Bigger the Turbine, The Greener the Electricity?

Caduff

Huijbregts

Althaus

et al. 2012

Environ. Sci. Technol.

161

128

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Wind energy is a fast-growing and promising renewable energy source. The investment costs of wind turbines have decreased over the years, making wind energy economically competitive to conventionally produced electricity. Size scaling in the form of a power law, experience curves and progress rates are used to estimate the cost development of ever-larger turbines. In life cycle assessment, scaling and progress rates are seldom applied to estimate the environmental impacts of wind energy. This study quantifies whether the trend toward larger turbines affects the environmental profile of the generated electricity. Previously published life cycle inventories were combined with an engineering-based scaling approach as well as European wind power statistics. The results showed that the larger the turbine is, the greener the electricity becomes. This effect was caused by pure size effects of the turbine (micro level) as well as learning and experience with the technology over time (macro level). The environmental progress rate was 86%, indicating that for every cumulative production doubling, the global warming potential per kWh was reduced by 14%. The parameters, hub height and rotor diameter were identified as Environmental Key Performance Indicators that can be used to estimate the environmental impacts for a generic turbine.

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Section: Methodsmentioning

confidence: 99%

Wind Power Electricity: The Bigger the Turbine, The Greener the Electricity?

Caduff

Huijbregts

Althaus

et al. 2012

Environ. Sci. Technol.

161

128

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“…Harrison 2011). In addition, there are effects of wind parks -both onshore and offshore -on wildlife (Drewitt and Langston 2006, Mathew 2006, Leung and Yang 2012, Schubert et al 2015). Regarding solar power, possible impairments include glare risks and visual impacts on buildings as well as on landscapes in case of free-standing solar plants (Chiabrando et al 2009).…”

Section: Renewable Energymentioning

confidence: 99%

Electricity Externalities, Siting, and the Energy Mix: A Survey

Welsch

2016

IRERE

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Terms of use: Documents in AbstractWhile early literature on electricity externalities was largely concerned with fossil fuel power generation and the associated emissions, nuclear accidents (Chernobyl, Fukushima) and the large-scale deployment of renewable energy facilities have spurred a wave of research on the externalities of nuclear power and renewable energies. The issue is important because many countries have started reconsidering their energy policies, and the externalities from electricity generation play a major role in the benefit-cost analysis of relevant options. This paper reviews the literature on electricity-related externalities. It starts by discussing their nature and the methods employed in valuing them. It finds that appraisals of electricity externalities are complicated because of heterogeneity of both the externalities themselves and the methods applied in measuring them. The paper reviews valuation studies of the externalities from fossil fuel, nuclear and renewable sources, and it discusses the relevance of their findings for the siting of plants and the electricity mix. It concludes by pointing out gaps in our knowledge about electricity externalities that deserve to be addressed in future research.

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“…The coefficient of power (Cp) values for all variations are less than 0.3 or 30%. That means according to the theory that the maximum Cp value for the Savonius wind turbine is 0.3 or 30% [10]. Figure 10 also shows that there is an increase in power coefficient (Cp) along with the increase of tip speed ratio (λ) to the peak, then decreasing the value of Cp to tip speed ratio (λ).…”

Section: Coefficient Of Power and Tip Speed Ratiomentioning

confidence: 87%

Performance ‘S’ Type Savonius Wind Turbine with Variation of Fin Addition on Blade

Pamungkas

Wijayanto

Saputro

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Wind power has been receiving attention as the new energy resource in addressing the ecological problems of burning fossil fuels. Savonius wind rotor is a vertical axis wind turbines (VAWT) which has relatively simple structure and low operating speed. These characteristics make it suitable for areas with low average wind speed as in Indonesia. To identify the performance of Savonius rotor in generating electrical energy, this research experimentally studied the effect of fin addition for the 'S' shape of Savonius VAWT. The fin is added to fill the space in the blade in directing the wind flow. This rotor has two turbine blades, a rotor diameter of 1.1 m and rotor height of 1.4 m, used pulley transmission system with 1:4.2 multiplication ratio, and used a generator type PMG 200 W. The research was conducted during dry season by measuring the wind speed in the afternoon. The average wind speed in the area is 2.3 m/s with the maximum of 4.5 m/s. It was found that additional fin significantly increase the ability of Savonius rotor VAWT to generate electrical energy shown by increasing of electrical power. The highest power generated is 13.40 Watt at a wind speed of 4.5 m/s by adding 1 (one) fin in the blade. It increased by 22.71% from the rotor blade with no additional fin. However, increasing number of fins in the blade was not linearly increase the electrical power generated. The wind rotor blade with 4 additional fins is indicated has the lowest performance, generating only 10.80 Watt electrical power, accounted lower than the one generated by no fin-rotor blade. By knowing the effect of the rotor shape, the rotor dimension, the addition of fin, transmission, and generator used, it is possible to determine alternative geometry design in increasing the electrical power generated by Savonius wind turbine.

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Economics of wind energy

Cited by 30 publications

References 3 publications

Wind Power Electricity: The Bigger the Turbine, The Greener the Electricity?

Wind Power Electricity: The Bigger the Turbine, The Greener the Electricity?

Electricity Externalities, Siting, and the Energy Mix: A Survey

Performance ‘S’ Type Savonius Wind Turbine with Variation of Fin Addition on Blade

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