Memorias de investigación
Artículos en revistas:
Experimental observations on hot-spots and derived
Año:2015
Áreas de investigación
  • Tecnología electrónica y de las comunicaciones
Datos
Descripción
The hot-spot phenomenon is a relatively frequent problem occurring in current photovoltaic generators. It entails both a risk for the photovoltaic module?s lifetime and a decrease in its operational efficiency. Nevertheless, there is still a lack of widely accepted procedures for dealing with them in practice. This paper presents the IES?UPM observations on 200 affected photovoltaic modules. Visual and infrared inspection, as well as electroluminescence, peak power rating and operating voltage tests have been carried out. Thermography under steady state conditions and photovoltaic module operating voltage, both at normal photovoltaic system operating conditions, are the selected methods to deal in practice with hot-spots. The temperature difference between the hot-spot and its surroundings, and the operating voltage differences between affected and non-affected photovoltaic modules are the base for establishing defective criteria, at the lights of both lifetime and operating efficiency considerations. Hot-spots temperature gradients larger than 20 ?C, in any case, and larger than 10 ?C when, at the same time, voltage operating losses are larger than the allowable power losses fixed at the photovoltaic module warranties, are proposed as rejecting conditions for routine inspections under contractual frameworks. The upper threshold of 20 ?C is deduced for temperate climates from the basic criterion of keeping absolute hot-spot temperatures below 20 ?C. ? 2015 Elsevier Ltd. All rights reserved.
Internacional
Si
JCR del ISI
Si
Título de la revista
Solar Energy
ISSN
0927-0248
Factor de impacto JCR
5,03
Información de impacto
Datos JCR del año 2013
Volumen
118
DOI
doi.org/10.1016/j.solener.2015.05.009
Número de revista
Desde la página
28
Hasta la página
40
Mes
MAYO
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Participantes
Grupos de investigación, Departamentos, Centros e Institutos de I+D+i relacionados
  • Creador: Centro o Instituto I+D+i: Instituto de Energía Solar
  • Departamento: Electrónica Física