Showing papers in "Renewable Energy in 2000"

TL;DR: In this paper, the authors argue that institutional factors have a greater impact on wind energy facility siting, and discuss two examples of how institutional factors shape the level of support when implementing wind power.

TL;DR: In this paper, the two parameters of a Weibull density distribution function were calculated for three different locations; a city area, an extremely exposed area in a city centre and an open sea area in Hong Kong.

TL;DR: A comparison of various forecasting approaches, using time series analysis, on mean hourly wind speed data, including the traditional linear (ARMA) models and the commonly used feed forward and recurrent neural networks is presented.

TL;DR: In this paper, the assessment of energy and emissions related to the production and manufacture of materials for an offshore wind farm as well as a wind farm on land based on a life cycle analysis (LCA) model is presented.

TL;DR: In this paper, the authors analyzed the impact of key parameters such as photovoltaic array area, number of wind machines, and battery storage capacity on the operation of hybrid (wind + solar + diesel) energy conversion systems, while satisfying a specific annual load of 41,500 kWh.

TL;DR: In this paper, the authors investigated the optimal thermohydraulic performance (i.e., maximum heat transfer for minimum friction loss) of artificially roughened solar air heaters.

TL;DR: In this article, the authors compared the performance of the standard and advanced injection timing on both diesel fuel and vegetable oil fuels, with the same engine and test procedures so that comparative assessments may be made.

TL;DR: In this paper, the effect of twisted-tape geometry, flow Reynolds number and intensity of solar radiation on the thermal performance of the solar water heater has been presented, and the results on heat transfer and friction data have been found to compare well with available results.

TL;DR: In this paper, a second law analysis based on an exergy concept for a solar thermal power system is presented, where the main energy loss takes place at the condenser of the heat engine part, whereas the exergy analysis shows that the collector-receiver assembly is the part where the losses are maximum.

TL;DR: In this article, the heat storage capacity and structural stability at multiple thermal cycling of the composite PCM concrete system that consists of sodium thiosulphate pentahydrate absorbed into porous concrete are investigated.

TL;DR: In this paper, a correlation between the measurements of global solar radiation and the meteorological parameters were given for the considered locations, and the correlation and the regression coefficients and the standard errors of estimate were listed in Table 1 Table 1.

TL;DR: In this paper, a transient analytical model is presented for a flat-plate solar air heater with and without thermal storage, where the air temperature is assumed to vary with time and space coordinates.

TL;DR: In this paper, the effect of rotation on the blade boundary layer of a wind turbine was investigated by solving the 3-D integral boundary layer equations with the assumed velocity profiles and a closure model (including both laminar and turbulent boundary layer models).

TL;DR: In this article, a methodology is presented for downscaling General Circulation Model (GCM) output to predict surface wind speeds at scales of interest in the wind power industry under expected future climatic conditions.

TL;DR: In this paper, the authors compare the properties and qualities of natural and solar-dried fruits and vegetables to arrive at the preferred drying method, and conclude that the mixed and indirect modes of drying were more effective than natural drying, since the final moisture contents for grapes were 12.5, 20.05 and 68.45%, respectively.

TL;DR: In this paper, a channelling device, integrated into the flotation system, is used to modify flow conditions in the neighbourhood of the rotor, in order to improve technical and economic performance.

TL;DR: In this paper, the economics of stand-alone photovoltaic power system is studied to test its feasibility in remote and rural areas of Bangladesh and to compare renewable generators with non-renewable generators.

TL;DR: In this paper, the mean wind data for 64 stations, 48 of which are located in Algeria and 16 in neighbouring countries has been used to establish the wind energy map of Algeria at a height of 10 m.

TL;DR: In this paper, a methodology is developed to determine the optimal size of PV-hybrid subsystems and to optimize the stand-alone system management, and the optimal configuration leading to the autonomy constraint, is determined on the basis of a minimization of the kWh cost.

TL;DR: In this article, a method for predicting the long-term average conventional energy displaced by a photovoltaic system comprising of an array, a storage battery, some power conditioning equipment with maximum power tracking capability and an auxiliary power facility is described.

TL;DR: In this article, diesel fuel properties of sunflower oil were determined and long term engine tests were performed for 50h with a single-cylinder (volume: 1007 cm3) direct injection, air cooled diesel engine, having a bore/stroke ratio of 108:110mm.

TL;DR: In this article, a thermosyphon solar water heater consisting of two flat plate collectors of total aperture area of 2.7 m2 and 150 l storage tank is modelled using TRNSYS.

TL;DR: In this paper, the climatological Angstrom regression coefficients have been determined by three methods and used to predict the global solar radiation over eight meteorological stations over eight years, each of the three methods depends on the correlation between two ratios.

TL;DR: In this paper, the authors present a simple method for estimating the likely energy savings in electric lighting due to daylighting and the possible cooling penalty, based on on-off and top-up control.

TL;DR: In this paper, the results from studies undertaken to develop three low cost, solar regenerative clay-CaCl 2 based solid desiccant materials; establish their moisture sorption and regeneration characteristics; assess their performance when compared with commercial desiccants; and integrate these within a low cost solar drying system for small-scale village-based crop drying.

TL;DR: In this article, the authors investigated the possibility of substituting a plant fuel pilot injection for diesel fuel for combustion of natural gas in a diesel engine and found that engine performance on these alternative pilot fuels was satisfactory and compared favourably with the baseline test result on diesel fuel.

TL;DR: In this paper, a spreadsheet computer program is used for the parametric study to find out the optimum configuration of the wall-roof chimney and to find the best height.

TL;DR: In this paper, the feasibility of cooling by using night radiation under Thailand's hot and humid climate was discussed, mainly based on the temperature of different surfaces of a roof radiator, and the experimental results showed that the depression of different surface temperatures is in the range of 1-6°C below ambient temperature under clear and cloudy skies.