Shedding Light on the Solar Resource
Shedding Light on the Solar Resource
Shedding Light on the Solar Resource
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<str<strong>on</strong>g>Shedding</str<strong>on</strong>g> <str<strong>on</strong>g>Light</str<strong>on</strong>g> <strong>on</strong> <strong>the</strong><br />
<strong>Solar</strong> <strong>Resource</strong><br />
<strong>Solar</strong> <strong>Resource</strong><br />
Phil Hofmeyer, PhD<br />
Asst. Prof. ~ Renewable Energy<br />
April 10, 2010<br />
Mohawk Valley Science<br />
Teachers Associati<strong>on</strong><br />
Saturday Morning Science
Overview<br />
• Overview of <strong>the</strong> solar resource in <strong>the</strong> U.S.<br />
• Features impacting solar irradiati<strong>on</strong><br />
» Latitude, cloud cover, seas<strong>on</strong>ality<br />
• C<strong>on</strong>verting power to energy<br />
• Tools to measure solar energy and shading<br />
http://retc.morrisville.edu 2
Heliocentric life!<br />
Image from Photolvotaic Systems, NJATC<br />
http://retc.morrisville.edu 3
A wobbly dispositi<strong>on</strong>…<br />
Image from Photolvotaic Systems, NJATC<br />
http://retc.morrisville.edu 4
Global <strong>Solar</strong> Energy – latitude effects<br />
ww.larc.nasa.gov<br />
http://earth-ww<br />
http://retc.morrisville.edu 5
3/30/2009 http://retc.morrisville.edu 6
Sun Path –New York<br />
Summer Solstice<br />
Equinox<br />
Winter Sos Solstice<br />
E<br />
N<br />
S<br />
W<br />
This angle should be equal to your latitude pointing true south (general rule of thumb)<br />
http://retc.morrisville.edu 7
p://www.ngdc.noaa.gov/geomag/ic<strong>on</strong>s/us_d_c<strong>on</strong>tour.jpg<br />
htt<br />
True south and magnetic declinati<strong>on</strong><br />
http://retc.morrisville.edu 8
Summer Solstice<br />
Equinox<br />
<strong>Solar</strong> irr radiance (W/m 2 )<br />
Winter Solstice<br />
Area under <strong>the</strong><br />
curve is solar<br />
energy (irradiati<strong>on</strong>)<br />
Morning <strong>Solar</strong> No<strong>on</strong> Evening<br />
3/30/2009 http://retc.morrisville.edu 9<br />
Adapted from Photolvotaic Systems, NJATC
Sun Path Diagrams<br />
Image from Photolvotaic Systems, NJATC<br />
http://retc.morrisville.edu 10
Syracuse Irradiati<strong>on</strong> data<br />
M<strong>on</strong>th<br />
Daily sun<br />
hours<br />
M<strong>on</strong>thly sun<br />
hours<br />
Jan 2.8 86.8<br />
Feb 3.6 100.8<br />
Mar 4.2 130.2<br />
Apr 4.5 135<br />
May 4.6 142.6<br />
Jun 47 4.7 141<br />
Jul 4.9 151.9<br />
Aug 4.8 148.8<br />
Sep 4.5 135<br />
Oct 3.7 114.7<br />
Nov 2.3 69<br />
Dec 2.1 65.1<br />
Year http://retc.morrisville.edu 3.9 1420.9<br />
11
<strong>Solar</strong> energy<br />
http://retc.morrisville.edu 12
Estimating <strong>the</strong> <strong>Solar</strong> <strong>Resource</strong><br />
http://retc.morrisville.edu 13
Estimating <strong>the</strong> <strong>Solar</strong> <strong>Resource</strong><br />
http://retc.morrisville.edu 14
Estimating <strong>the</strong> <strong>Solar</strong> <strong>Resource</strong><br />
S<br />
E<br />
W<br />
http://retc.morrisville.edu 15
Estimating <strong>the</strong> <strong>Solar</strong> <strong>Resource</strong><br />
Shade Losses<br />
June (lowest line): 1+1+2+2+3 = 9%<br />
July (next up): 1+1+2+3+3 = 10%<br />
May: 1+1+2+3+3 = 10%<br />
August: 1+1+2+2+3 = 9%<br />
April: 1+2+2+3 = 8%<br />
September: 1+2+2 = 5%<br />
October: 1%<br />
<strong>Solar</strong> Access of 95%<br />
http://retc.morrisville.edu 16
Shading impacts<br />
Daily Annual sun <strong>Solar</strong><br />
M<strong>on</strong>th sun hours hours access Total<br />
Jan 2.8 86.8 100% 86.8<br />
Feb 3.6 100.8 100% 100.8<br />
Mar 4.2 130.2 100% 130.2<br />
Apr 45 4.5 135 92% 124.22<br />
May 4.6 142.6 90% 128.3<br />
Jun 4.7 141 91% 128.3<br />
Jul 4.9 151.9 90% 136.7<br />
Aug 4.8 148.8 91% 135.4<br />
Sep 4.5 135 95% 128.3<br />
Oct 3.7 114.7 99% 113.6<br />
Nov 2.3 69 100% 69.0<br />
Dec 21 2.1 65.1 100% 65.1<br />
Year 3.9 1420.9 95% 1346.7<br />
http://retc.morrisville.edu 17
Let’s try it out!<br />
Phil Hofmeyer<br />
315-684-6515<br />
hofmeypv@morrisville.edu<br />
h f @ i ill d<br />
http://retc.morrisville.edu
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