Title :
Flat high concentration devices
Author :
Miñano, J.C. ; González, J.C. ; Zanesco, I.
Author_Institution :
Inst. de Energia Solar, Madrid, Spain
Abstract :
New concentrators achieving the theoretical maximum acceptance-angle-concentration product have appeared. Besides this, some of these concentrators are very compact (concentrator depth/aperture diameter smaller than 1/3). The feasibility of these concentrators for photovoltaic applications is studied. It is concluded that these concentrators may be useful for high concentration cells (irradiance for maximum efficiency greater than 800 suns) if these cells have a small size (diameter smaller than 5 mm). The concentrators may provide for this case an acceptance angle of ≈±2.7 degrees with concentration factor around 1000× and a concentrator depth 10 times the cell diameter. Instantaneous direct insolation and ambient temperature measurements of Madrid and a thermal model of the heat sink is used to calculate the annual electric energy output with which different concentration factors are compared. Concentration of 1000× is close to the one giving the maximum annual electrical output
Keywords :
heat sinks; solar cells; solar energy concentrators; Madrid; ambient temperature measurement; concentration factor; flat high concentration devices; heat sink; high concentration cells; instantaneous direct insolation measurement; maximum acceptance-angle-concentration; photovoltaic applications; thermal model; Apertures; Costs; Dielectric losses; Optical materials; Optical refraction; Optical variables control; Photovoltaic systems; Refractive index; Solar power generation; Sun;
Conference_Titel :
Photovoltaic Energy Conversion, 1994., Conference Record of the Twenty Fourth. IEEE Photovoltaic Specialists Conference - 1994, 1994 IEEE First World Conference on
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1460-3
DOI :
10.1109/WCPEC.1994.520159
