Showing papers in "Renewable Energy in 2004"

TL;DR: In this paper, the authors reviewed the production and characterization of vegetable oil as well as the experimental work carried out in various countries in this field, and the scope and challenges being faced in this area of research are clearly described.

TL;DR: This paper introduces support vector machines (SVM), the latest neural network algorithm, to wind speed prediction and compares their performance with the multilayer perceptron (MLP) neural networks.

TL;DR: In this article, the authors determined the energy use in the Turkish agricultural sector for the period of 1975-2000, and showed that the use of inputs in Turkish agricultural production was not accompanied by the same result in the final product.

TL;DR: In this article, the wind energy potential of the region is statistically analyzed based on 1-year measured hourly time-series wind speed data and distributional parameters are identified, and two probability density functions are fitted to the measured probability distributions on a monthly basis.

TL;DR: In this article, a single-cylinder direct-injection engine operating on diesel fuel, jatropha oil, and blends of diesel and Jatropha Oil in proportions of 97.4%/2.6% was tested.

TL;DR: In this article, the authors present the results of a survey administered to households, personnel belonging to industry and commercial establishments, and policy experts with the objective of eliciting their views on the barriers to the diffusion of renewable energy technologies (RETs).

TL;DR: In this paper, a new carburetor was designed to solve the phase problem and increase the alcohol ratio in the total fuel by using ethanol-gasoline blend, the availability analysis of a spark-ignition engine was experimentally investigated.

TL;DR: In this paper, the production of bio-oil and biochar from rapeseed cake obtained by cold extraction pressing was investigated and the various characteristics of biochar and biooil acquired under static atmospheric conditions were identified.

TL;DR: In this article, the authors investigated four technologies which produce energy from municipal solid waste (MSW): incineration, gasification, generation of biogas and utilisation in a combined heat and power (CHP) plant, and conversion to transport fuel.

TL;DR: In this article, a mathematical model was used to estimate the total solar radiation on the tilted PV surface, and to determine optimum tilt angles for a PV panel installed in Sanliurfa, Turkey.

TL;DR: In this paper, the simulation of module temperature from nominal operation cell temperature (NOCT) is widely used to easily estimate module performance along the year, as it is used to compare the performance of different module designs and can influence system predictions.

TL;DR: In this article, a mathematical formulation by using a bimodal Weibull&Weibull probability distribution function (PDF) has been developed to analyze the wind speed frequency distribution in La Ventosa, Oaxaca, Mexico.

TL;DR: In this paper, the effects of increasing concentration of potato waste expressed as percentage of total solids and the initial inoculum-to-substrate ratio (ISR) on methane yield and productivity were investigated.

TL;DR: In this paper, a simple evaluation was conducted to establish the amount of energy that would be recovered based on the characteristics of the municipal solid waste (MSW) if it were to be incinerated.

TL;DR: In this article, the authors presented a study, carried out with the help of the French Agency of Innovation (ANVAR), which deals with the conception of a small Savonius rotor (i.e. of low power) for local production of electricity.

TL;DR: In this article, a willow biomass production model is developed using demonstration-scale fieldexperience from New York, and the system performance is compared to other renewables such as PV and wind.

TL;DR: In this article, the aim was to determine the most convenient location for a wind observation station to be built on the campus of a university using analytic hierarchy process (AHP) to evaluate the potentiality of the wind power.

TL;DR: An electromechanical system to follow the position of the sun was designed and built at the Solar Evaluation Laboratory of the Technical University Federico Santa Maria in Valparaiso, Chile and proves the effective work of a simple and cheap mechanism.

TL;DR: In this article, the effects of shunt and series resistances on photovoltaic module performance are discussed and the results show how currentvoltage characteristics and module performance is affected.

TL;DR: In this article, two multi-criteria decision-making (MCDM) tools are discussed in order to assist communities in prioritizing their renewable energy sources (RESs) alternatives.

TL;DR: In this paper, the potential of RME as a liquid fuel for diesel engines in relation to meeting emission requirements was evaluated, and the results showed that RME and its blends with diesel fuel emitted high CO2 compared to test results on diesel fuel.

TL;DR: In this paper, the effect of building height and street width on the shading of the street surfaces and ground for different orientations have been examined and evaluated to explore the extent to which these parameters affect the temperature in the street.

TL;DR: In this paper, a conceptual framework is provided for a hybrid power station that produces constant power output without the intermittent fluctuations inherent when using wind power, and the model shows that the hybrid plant could provide close to 20 MW of firm power to the electrical distribution system.

TL;DR: In this paper, the authors evaluated the effectiveness of new technologies on the basis of energy balance comparison and concluded that new technologies can improve biodiesel fuel life cycle energy efficiency by implementing new technologies in agriculture as well as in industrial processing.

TL;DR: In this article, the authors used obstacles of various forms to improve the thermal performance of the solar air collector, for some needs, encouraged them to carry out this study. Initially, they created an increasingly turbulent flow between the absorber and the back wooden plate, which allowed a good distribution of the fluid and reduced the dead zones.

TL;DR: In this article, the authors present a control strategy developed for the reactive power regulation of wind farms made up with double fed induction generators, in order to contribute to the voltage regulation of the electrical grid to which farms are connected.

TL;DR: In this paper, the authors present a feasibility study of a wind energy conversion system based zero energy home in Newfoundland, which is based on year round recorded wind speed data, solar data and power-consumed data in a typical R-2000 house in Newfoundland.

TL;DR: In this paper, the authors quantified the potential of generating electricity from the Alderney Race in the Channel Islands and identified fluid currents that could be used for the establishment of various size arrays in the race and constructed some logical course of action and direction for the installation of marine current turbines in array in the Race.

TL;DR: A new wind speed data generation scheme based upon wavelet transformation is introduced and compared to the existing wind speed generation methods namely normal and Weibull distributed independent random numbers, the first- and second-order autoregressive models, and thefirst-order Markov chain.

TL;DR: An Energy Service Company (ESCO) in the town of Nyimba, Zambia, has been operating 100 solar home systems since the year 2000 as discussed by the authors, which is part of a pilot project implemented by the Government of Zambia with the aim to apply the ESCO concept for diffusion of solar technology.