EEE463_Homework9_Solution_F07

EEE463_Homework9_Solution_F07 - Solar radiation data are...

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Unformatted text preview: Solar radiation data are available from the National Renewable Energy Laboratory (NREL) for various U.S. cities based on 30 years of measured data. You are to download the data for Phoenix from the National Solar Radiation Data Base (see http://rredc.nrel.gov/solar/); specifically, the 30-year (1961-1990) average of monthly solar radiation for each month. You are to graph the average monthly solar radiation for flat-plate collectors facing south at fixed tilts of 0°, latitude, and 90°, and two-axis tracking flat-plate collectors. In the end, you should have one plot with four curves versus the months of the year. Solution: 14 12 10 0° (flat) Lat (33.4°) 8 90° (vertical) 2-Axis 6 4 2 Dec Nov Oct Sep Aug Jul Jun May Apr Mar Feb 0 Jan Incident Solar (kW-hr/m²/day) Phoenix (WBAN 23183) Phoenix, July 21, Latitude Tilt, South Facing 1200 Solar Insolation (W/m²) 1000 Tracking Total Tilt Total (D+DS) Tilt Direct (D) Tilt Diffuse-Scatter (DS) 800 600 400 200 0 200 300 400 500 600 700 Time, AST (min) 800 900 1000 1100 1200 K.E. Holbert 10/13/2006 Phoenix 21-Jan 21-Feb 21-Mar 21-Apr 21-May 21-Jun 21-Jul 21-Aug 21-Sep 21-Oct 21-Nov 21-Dec Solar-PHX Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Direct Diffuse Total NREL Solar Insolation (kW·hr/m²·day) Horizontal (Flat) Vertical facing South Sun tracking 3.5 5.4 7.8 0.5 0.2 0.3 3.9 5.6 8.1 3.2 4.9 6.6 4.7 5.0 8.8 0.5 0.3 0.4 5.2 5.3 9.2 4.3 5.0 7.7 5.8 3.8 9.5 0.7 0.3 0.5 6.5 4.2 10.0 5.5 4.5 8.7 6.6 2.0 9.7 0.9 0.5 0.8 7.5 2.5 10.5 7.1 3.7 10.4 10.0 1.0 9.8 1.2 0.6 1.0 8.2 1.6 10.9 8.0 2.7 11.2 7.0 0.7 9.8 1.3 0.7 1.1 8.3 1.3 10.9 8.4 2.3 11.6 6.8 0.9 9.5 1.3 0.7 1.1 8.1 1.6 10.6 7.6 2.4 10.1 6.2 1.9 9.1 1.1 0.6 0.9 7.3 2.5 10.0 7.1 3.1 9.8 5.4 3.6 8.8 0.8 0.4 0.7 6.2 4.0 9.5 6.1 4.2 9.3 4.4 4.8 8.3 0.6 0.3 0.5 5.0 5.1 8.7 4.9 5.1 8.5 3.4 5.3 7.5 0.5 0.2 0.3 3.8 5.5 7.8 3.6 5.1 7.1 3.0 5.4 7.2 0.4 0.2 0.3 3.4 5.6 7.5 3.0 4.8 6.3 EEE463-F06 Page 1 of 1 ...
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This note was uploaded on 02/11/2012 for the course EEE 463 taught by Professor Holbert during the Spring '08 term at ASU.

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