Showing papers in "Solar Energy in 2012"

TL;DR: In this paper, the results of adapting the solar radiation data calculated from satellite data in the Climate Monitoring Satellite Application Facility (CM-SAF) to PVGIS are presented.

TL;DR: In this paper, the authors evaluate and compare several forecasting techniques using no exogenous inputs for predicting the solar power output of a 1MWp, single-axis tracking, photovoltaic power plant operating in Merced, California.

TL;DR: The aim of this paper is to present a brief review about the sizing methodologies developed in the recent years about the hybrid energy system designing.

TL;DR: Comparative study among different parameter estimation techniques is presented to show the effectiveness of the developed approach, and statistical analyses are carried out to measure the accuracy of the estimated parameters and model suitability.

TL;DR: In this paper, a combined modeling and experimental study is presented to optimize the efficiency of liquid-based solar receivers seeded with carbon-coated absorbing nanoparticles, where the effect of solar concentration, nanofluid height, and optical thickness on receiver performance is investigated.

TL;DR: Three state-of-the-art HS variants are used to determine the unknown parameters of the solar cell single and double diode models and results manifest the superiority of the HS-based algorithms over the other studied algorithms in modeling solar cell systems.

TL;DR: In this article, the photoelectrochemical properties of dye-sensitized solar cells using natural pigments containing betalains and anthocyanins as sensitizers were presented.

TL;DR: In this paper, a modified current-voltage relationship for the single-diode model is presented, based on the well-known equivalent circuit for a single photovoltaic (PV) cell.

TL;DR: In this article, a thermal energy storage system, consisting of a packed bed of rocks as storing material and air as high-temperature heat transfer fluid, is analyzed for concentrated solar power (CSP) applications.

TL;DR: In this article, the authors compared the electricity generation costs for LFC and Parabolic Trough Collector (PTC) technologies in solar thermal power plants and determined the break-even cost where cost-parity of electricity generation with a PTC reference plant is reached.

TL;DR: In this article, the intrinsic performance of 18 broadband radiative models is assessed, using high-quality datasets from five sites in widely different climates, and the results show that the inferior performance of models requiring little or no atmospheric inputs suggests that large scale solar resource products derived from them may be inappropriate for serious solar applications.

TL;DR: In this paper, the effect of pH variation of MWCNT-H 2 O nanofluid on the efficiency of a flat-plate solar collector was investigated experimentally.

TL;DR: A new model and a biomimetic pattern for heliostat field layout optimization are introduced, inspired by the spirals of the phyllotaxis disc pattern, which generates layouts of both higher insolation-weighted efficiency and higher ground coverage than radially staggered designs.

TL;DR: In this paper, a detailed three-dimensional computational model of the whole parabolic trough solar collector (PTC) system and corresponding numerical simulations by combining the Finite Volume Method (FVM) and the Monte Carlo Ray-Trace (MCRT) method were presented.

TL;DR: In this article, the reliability of three-days-ahead global horizontal irradiance (GHI) and direct normal irradiance forecast provided by the WRF mesoscale atmospheric model for Andalusia (southern Spain) was evaluated.

TL;DR: Lave et al. as mentioned in this paper applied a wavelet transform to both the clear-sky index at one site and the average of six sites to estimate the smoothing of aggregated power output due to geographic dispersion in a distribution feeder.

TL;DR: In this article, three forecasting methods are proposed using different types of meteorological data as input parameters, namely, global horizontal irradiance (GHI), diffuse horizontal irradiances (DHI), direct normal irradiance and cloud cover.

TL;DR: In this paper, the authors investigated the possibility of using thermoelectric generators in solar hybrid systems and found that the TEG's efficiency has almost linear dependence on the temperature difference Δ T between its plates, reaching 4% at Δ T ǫ = 155 Ã − Ã Ã (hot plate at 200 Ã )°C with 3 W of power generated over the matched load.

TL;DR: In this article, an Artificial Neural Networks (ANNs) methodology is applied to data obtained from a 750-W power capacity of solar PV panel and the main objective of this paper is to determine time horizon having the highest representative for generated electricity prediction of small scale solar power system applications.

TL;DR: In this paper, the authors compare the initial costs of both thermally and electrically driven cooling systems, including projections about future costs of solar electric and solar thermal systems, and include estimates of the environmental impacts of the key components in each solar cooling system presented.

TL;DR: In this paper, the effect of wind, and shading by different means ( galleries, horizontal shading or trees) on outdoor thermal comfort in an enclosed courtyard has been studied numerically by the three dimensional prognostic microclimate model, Envi-met 3.1.

TL;DR: In this article, the performance results of two double axis sun tracking photovoltaic (PV) systems are analyzed after one year of operation, and the difference between the simulated and measured energy values are less than 5%.

TL;DR: In this article, an experimental investigation has been carried out for a range of system and operating parameters in order to analyse the effect of artificial roughness on heat transfer and friction characteristics in solar air heater duct which is having dimple shaped elements arranged in angular fashion (arc) as roughness elements on absorber plate.

TL;DR: In this article, the performance of a hybrid system composed of a GaAs solar cell and a skutterudites CoSb3 solar thermoelectric generator (TEG) is simulated.

TL;DR: In this paper, the photocatalytic activity depends on the generation of electron hole pairs and the existence of different phases, and the authors have tried to correlate the optical and morphological studies with these results to understand the phenomenon of photo catalytic activity at nanoscale.

TL;DR: In this paper, a comparison between the thermophysical properties of two heat transfer fluids (HTFs), Hitec (a ternary molten salt 53% KNO3 + 40% NaNO2 + 7% Na NO3) and liquid sodium (Na), has been carried out to determine their suitability for use in high-temperature concentrated solar thermal central-receiver systems for power generation.

TL;DR: In this paper, the authors introduce a novel approach to estimate the maximum short-term output variability that an arbitrary fleet of PV systems places on any considered power grid, based on a model that demonstrates that the maximum possible variability for N identical, uncorrelated PV systems equals the total installed capacity divided by 2 N.

TL;DR: Anatase TiO2 nanoparticles dressed with gold nanoparticles were synthesized by hydrothermal process by using mixed precursor and controlled conditions Diffused Reflectance Spectra (DRS) reveal that in addition to the expectedTiO2 interband absorption below 360nm gold surface plasmon feature occurs near 564nm as mentioned in this paper.

TL;DR: In this paper, the Schottky barrier junctions of tin disulfide (SnS2) on p-silicon were fabricated using sol-gel spin technique, and the photoresponse and junction properties of the diode were investigated.

TL;DR: In this article, a procedure for estimating the photovoltaic (PV) potential of an urban region from LiDAR data using the Solar Analyst tool is described, and it is shown that for a low PV penetration (about 10% of total roof area) the PV potential can be well estimated by considering no shade and local optimum inclination and orientation.