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Source : EDP Sciences

Scenarios for refurbishment of a hydropower plant equipped with Francis turbines

Muntean, Sebastian et al. 

The energy market imposes new requirements in hydraulic turbines operation. Usually, the old hydraulic turbines are not designed to meet these new requirements. Therefore, the refurbished solutions for hydraulic turbines are expected to be robust and flexible in operation in order to regulate the ...

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Source : EDP Sciences

The evolution of the support scheme for promoting renewable energy sources in Romania

Atănăsoae, Pavel et al. 

The paper presents an analysis of the evolution of the support scheme for promoting renewable energy sources in Romania, following: the annual mandatory quotas of green certificate purchase and those achieved; the price of green certificates; the evolution of the RES-E installed capacity and ...

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Source : EDP Sciences

Quantum mechanical effects analysis of nanostructured solar cell models

Badea, Andrei et al. 

The quantum mechanical effects resulted from the inclusion of nanostructures, represented by quantum wells and quantum dots, in the i-layer of an intermediate band solar cell will be analyzed. We will discuss the role of these specific nanostructures in the increasing of the solar cells efficiency. ...

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Source : EDP Sciences

The role of community energy in renewable energy use and development

Yamamoto, Yoshihiro 

As a number of researchers have observed, local communities play an important role in facilitating decentralized renewable energy (RE). Based on a literature review, this study identifies viewpoints with implications for community energy organization models that merit further investigation. First, ...

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Source : EDP Sciences

Preparing research on optimized construction of sustainable human living environment in regions where people of a certain ethnic group live in compact communities in China

Dong, Junyan et al. 

Due to the poor transport system, remoteness and few channels to access to information from the outside world in most minority-inhabited areas in China, buildings in these areas are well preserved. In particular, dwellings in these places show low-tech and ecological features. Different types and ...

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Source : EDP Sciences

Outer rotor eddy current heater for wind turbines

Tudorache, Tiberiu et al. 

This paper proposes a conversion system of wind energy into thermal energy by means of an outer rotor permanent magnet eddy current heater. The main advantages of this device are the following: compactness, easy temperature control by water flow rate regulation, reduced energy cost per kWh, ...

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Source : EDP Sciences

Estimating solar irradiation in the Arctic

Babar, Bilal et al. 

Solar radiation data plays an important role in pre-feasibility studies of solar electricity and/or thermal system installations. Measured solar radiation data is scarcely available due to the high cost of installing and maintaining high quality solar radiation sensors (pyranometers). Indirect ...

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Source : EDP Sciences

Energetic and exergetic analysis of Rankine cycles for solar power plants with parabolic trough and thermal storage

Cenuşă, Victor-Eduard et al. 

The paper analyzes the “secondary” circuit (for thermodynamic conversion) of a Concentrated Solar Power (CSP) plant with thermodynamic cycle, whose mirrors field supplies a thermal power, averaged over a sunny day, of about 100 MW heat. We study the case of parabolic trough solar collector using ...

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Source : EDP Sciences

Influence of the side-by-side arrangement on the performance of a small Savonius wind turbine

Jang, Choon-Man et al. 

Scaled-down Savonius turbine rotors arrayed side-by-side are introduced to analyze the effects of design parameters on the performance between turbine rotors. Unsteady flow simulation and experimental measurement have been performed to compare turbine performance and validate the numerical ...

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Source : EDP Sciences

Economic evaluation of small wind turbines and hybrid systems for residential use

Predescu, Mihail 

Renewable electricity generating systems are gaining ground in residential sector for the purpose of diminishing the electricity bills or to reaching some degree of energy independence. The decision to invest in small wind turbines or hybrid energy generation technologies should be based on an ...

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