author = "Askins, Stephen"

Encontrado 24 documentos, página mostrada 1 de 3

Evaluation of misalignments within a concentrator photovoltaic module by the module optical analyzer: a case of study concerning temperature effects on the module performance

Description: Instituto de Energía Solar, Universidad Politécnica de Madrid (IES-UPM) has developed a method [referred to as the luminescence inverse (LI) method] and equipment [called module optical analyzer (MOA)] to fast measure the optical-angular properties of a CPV module without illumination system nor mod...
Language(s): Inglés

Characterizing CPV in a Lattice Mismarched World

Description: In this work, we discuss difficulties we have faced while characterizing non-LM-Ge based CPV modules at the Instituto de Energía Solar, including: 1. For MJ cells with a 1eV bottom, bottom sub-cells may be current matched to the other two cells at reference spectrum. 2.In the case of metamorphic sel...
Language(s): Inglés

Atmospheric parameters, spectral indexes and their relation to CPV spectral performance

Description: Air Mass and atmosphere components (basically aerosol (AOD) and precipitable water (PW)) define the absorption of the sunlight that arrive to Earth. Radiative models such as SMARTS or MODTRAN use these parameters to generate an equivalent spectrum. However, complex and expensive instruments (as AERO...
Language(s): Inglés

Durability of dielectric fluids for concentrating photovoltaic systems

Description: Several dielectric fluids that might be used for immersing optics are analyzed in this paper. Their transmittances, both before and after an accelerated exposure to ultraviolet (UV) radiation equivalent to several years under real sun, are presented. In addition, the photocurrent losses caused by th...
Language(s): Inglés

Experimental analysis of a photovoltaic concentrator based on a single reflective stage immersed in an optical fluid

Description: This article reviews all the experimental tests carried out to analyze the performance of a FluidReflex photovoltaic concentrator. This novel concentrator concept consists of a single reflective stage immersed in an optical fluid. The presence of the fluid entails significant advantages. It not only...
Language(s): Inglés

Assessment of the optical efficiency of a primary lens to be used in a CPV system

Description: This article summarizes experimental methods to evaluate the performance and to assess the efficiency of a lens that will be used as primary optics in a concentrating photovoltaic system comprising multijunction solar cells. The methods are classified into two groups: those intended to quantify the ...
Language(s): Inglés

A novel achromatic Fresnel lens for high concentrating photovoltaic systems

Description: In this paper we present a novel manufacturing method to produce achromatic Fresnel lenses for photovoltaic application. These achromatic lenses are capable of reaching a concentration factor three times higher than that attained by a conventional Silicone-on-Glass (SOG) Fresnel lens. The manufactur...
Language(s): Inglés

Methodology of quantifying curvature of Fresnel lenses and its effect on CPV module performance

Description: Fresnel lenses used as primary optics in concentrating photovoltaic modules may show warping produced by lens manufacturing or module assembly (e.g., stress during molding or weight load) or due to stress during operation (e.g., mismatch of thermal expansion between different materials). To quantify...
Language(s): Inglés

Characterization of CPV arrays based on differences on their thermal resistances

Description: Thermal characterization of Concentrating Photovoltaics (CPV) modules and Arrays is needed to determine their performance and modelling of energy forecast. Module-ambient thermal resistance is easily obtained from its definition but the cell-module thermal resistant needs to be estimated from indire...
Language(s): Inglés

Hybrid dome with total internal reflector as a secondary optical element for CPV

Description: Secondary optical elements (SOEs) are used in Concentrator Photovoltaic (CPV) modules to allow the concentration ratio to exceed those typically achievable by Fresnel lenses, reducing cell costs, without sacrificing tolerance to tracking errors. One option is a “dome” SOE: a simple, single surface r...
Language(s): Inglés

Encontrado 24 documentos, página mostrada 1 de 3

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