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Author Topic: 24/365 solar cell output theory and experiments  (Read 46474 times)

Offline lancaIV

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Re: 24/365 solar cell output theory and experiments
« Reply #105 on: August 15, 2021, 03:37:43 PM »
https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=0&ND=3&adjacent=true&locale=en_EP&FT=D&date=19900201&CC=DE&NR=3817730A1&KC=A1


Let us doing the maths :


solar constant : 1333 W/sqm


on atmosphere top : 1050 W/sqm


https://worldwide.espacenet.com/publicationDetails/description?CC=US&NR=5229624A&KC=A&FT=D&ND=3&date=19930720&DB=EPODOC&locale=en_EP
only calculating with 600 Wp solar radiation/sqm !


latitude dependent lumen/W : 70-105 ,average 93


1 sqm solar radiation a equivalent 1050W x 93 Lm/W = 97650 lumen


The        DE3817730 ( 1988 priority and materials )    1 meter lamp a 35 W offers maximal 38 lm/W = 1330 lumen !


But this industrial "38 lumen per Watt" measurement  number is for 1 metre distance to calculate !




inverse square law of light : https://petapixel.com/2016/06/02/primer-inverse-square-law-light/


when by 1    metre distance   : (1/1)v2 x 38 lumen  =      38 lumen/Watt/sqm area x 35W  =     1330 lumen/sqm


             0,1 metre  distance  : (1/0,1)v2 x 38 lumen = 3800 lumen/Watt/sqm area x 35 W = 133 000 lumen/sqm




ergo " 1 sqm radiation a equivalent 1050W x 93 Lm/W = 97650 lumen " with 133 000 lumen/sqm surpassed !


133 000 lumen   /   93 lm/W =       1430 W  daylight per hour


                                                  x 5,25%    1988 solar cell  conversion efficiency       


                                                 x 15-25%   2021 solar cell conversion efficiency     




                                                x  45 %       2021 tandem thermionic cell

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