1) I need to know how much power is generated from a solar cell at AM1.5?2) When used indoors the...

Question

1) I need to know how much power is generated from a solar cell at AM1.5?

2) When used indoors the available power from the solar cell may reduce by a factor of 1000. Calculate the shortfall in power generation needed for the calculator if the power output of the solar cell is reduced by this amount?

From the text book provided:

Cell dimension = 1.5 x 3.5 cm^2

Calculator power consumption = 0.2 mW

AM1.5 at 1000 Wm^-2 is 3 x 10^21 photons m^-2 s^-1

Average energy of each photon is 2eV which is

2 x (1.6 x 10^-19) joules.

I need to show all working out. If any more information is needed please let me know I have the text book.

Robert · Accepted Answer

1) I need to know how much power is generated from a solar cell at AM1.5? 
Solar intensity vs zenith angle  and airmass coefficient AM
AM range due to pollution
[11]
 formula (I.1) ASTM G-173
[10]
 
degree
W/m
2
 W/m
2
 W/m
2
 
- 0 1367 
[14]
 1353 1347.9 
[15]
 
0° 1 840 .. 1130 = 990 ± 15% 1040  
23° 1.09 800 .. 1110 = 960 ± 16% 
[16]
 1020  
30° 1.15 780 .. 1100 = 940 ± 17% 1010  
45° 1.41 710 .. 1060 = 880 ± 20% 
[16]
 950  
48.2° 1.5 680 .. 1050 = 870 ± 21% 
[16]
 930 1000.4 
[17]
 
60° 2 560 .. 970 = 770 ± 27% 840  
70° 2.9 430 .. 880 = 650 ± 34% 
[16]
 710  
75° 3.8 330 .. 800 = 560 ± 41% 
[16]
 620  
80° 5.6 200 .. 660 = 430 ± 53% 470  
85° 10 85 .. 480 = 280 ± 70% 270  
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-Earthscan-10
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#math_I.1
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-G173-9
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-13
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-14
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-interpolation-15
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-interpolation-15
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-interpolation-15
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-16
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-interpolation-15
http://en.wikipedia.org/wiki/Air_mass_(solar_energy)#cite_note-interpolation-15
90° 38
20
==================================================================
==================================================================
= 
2) When used indoors the available power from the solar cell may reduce by a 
factor of 1000. Calculate the shortfall in power generation needed for the 
calculator if the power output of the solar cell is reduced by this amount? 
From the text book provided: 
ANSWER :- 
73 mW cm^-2 
/ 1000
= 7.

1) I need to know how much power is generated from a solar cell at AM1.5? 2) When used indoors the available power from the solar cell may reduce by a factor of 1000. Calculate the shortfall in power...

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