A grid-connected dual-axis tracking photovoltaic (PV) system was installed in the Upper Midwest of the U.S., defined as a cold region, and then evaluated and monitored for a 1 year period. This system serves as a real-world application of PV for electricity generation in a region long overlooked for PV research studies. Additionally, the system provides an opportunity for research, demonstration, and education of dual-axis tracking PV, again not commonly studied in cold regions. In this regard, experimental data for the system were collected and analyzed over a 1year period. During the year of operation, the PV system collected a total of 2173 kWh/m2, which equates to 5.95 kWh/m2 on average per day, of solar insolation and generated a total of 1815 kWh, which equates to an energy to rated power ratio of 1779 kWh/kWp of usable AC electrical energy. The system operated at an annual average conversion efficiency and performance ratio of 11% and 0.82%, respectively, while the annual-average conversion efficiency of the inverter was 92%. The tracking system performance is also compared to a stationary PV system, which is located in close proximity to the tracking PV system. The tracking system's conversion efficiency was 0.3% higher than the stationary system while the energy generation per capacity was 40% higher although the PV module conversion efficiencies were not significantly different for the two systems.

References

References
1.
Green
,
M. A.
,
Emery
,
K.
,
Hishikawa
,
Y.
,
Warta
,
W.
, and
Dunlop
,
E. D.
,
2016
, “
Solar Cell Efficiency Tables (Version 47)
,”
Prog. Photovoltaics
,
24
(
1
), pp.
3
11
.
2.
Fraunhofer ISE
,
2015
, “
Photovoltaics Report 2015
,” Fraunhofer Institute for Solar Energy Systems, Freiburg, Germany.
3.
Marszal
,
A. J.
,
Heiselberg
,
P.
,
Bourrelle
,
J.
,
Musall
,
E.
,
Voss
,
K.
,
Sartori
,
I.
, and
Napolitano
,
A.
,
2011
, “
Zero Energy Building–A Review of Definitions and Calculation Methodologies
,”
Energy Build.
,
43
(
4
), pp.
971
979
.
4.
Li
,
D. H.
,
Yang
,
L.
, and
Lam
,
J. C.
,
2013
, “
Zero Energy Buildings and Sustainable Development Implications–A Review
,”
Energy
,
54
, pp.
1
10
.
5.
Vázquez López
,
M.
, and
Rey-Stolle Prado
,
I.
,
2008
, “
Photovoltaic Module Reliability Model Based on Field Degradation Studies
,”
Prog. Photovoltaics
,
16
(
5
), pp.
419
433
.
6.
Quintana
,
M.
,
King
,
D.
,
McMahon
,
T.
, and
Osterwald
,
C.
, “
Commonly Observed Degradation in Field-Aged Photovoltaic Modules
,” 29th
IEEE
Photovoltaic Specialists Conference
, New Orleans, LA, May 19–24, pp.
1436
1439
.
7.
Kurtz
,
S.
,
Whitfield
,
K.
,
TamizhMani
,
G.
,
Koehl
,
M.
,
Miller
,
D.
,
Joyce
,
J.
,
Wohlgemuth
,
J.
,
Bosco
,
N.
,
Kempe
,
M.
, and
Zgonena
,
T.
,
2011
, “
Evaluation of High-Temperature Exposure of Photovoltaic Modules
,”
Prog. Photovoltaics
,
19
(
8
), pp.
954
965
.
8.
Gottschalg
,
R.
,
Betts
,
T.
,
Williams
,
S.
,
Sauter
,
D.
,
Infield
,
D.
, and
Kearney
,
M.
,
2004
, “
A Critical Appraisal of the Factors Affecting Energy Production From Amorphous Silicon Photovoltaic Arrays in a Maritime Climate
,”
Sol. Energy
,
77
(
6
), pp.
909
916
.
9.
National Renewable Energy Laboratory, 2016, “NREL's PVWatts Calculator,” Alliance for Sustainable Energy, LLC, Golden, CO, accessed Jan. 23, 2017, http://pvwatts.nrel.gov/
10.
National Weather Service Forecast Office
,
2008
, “
Observed Weather
,” U.S. Department of Commerce, Washington, DC, accessed Jan. 23, 2017, http://w2.weather.gov/climate/index.php?wfo=dmx
11.
National Climatic Data Center
,
2015
, “
NOAA's 1981-2010 Climate Normals
,” U.S. Department of Commerce, Washington, DC, accessed Jan. 23, 2017, http://www.ncdc.noaa.gov/oa/climate/normals/usnormals.html
12.
National Weather Service Forecast Office
,
2008
, “
NWS Forecast Office Des Moines, IA
,” U.S. Department of Commerce, Washington, DC, accessed Jan. 23, 2017, http://w2.weather.gov/climate/index.php?wfo=dmx
13.
Marion
,
B. A. J.
,
Boyle
,
K.
,
Hayden
,
H.
,
Hammond
,
B.
, and
Fletcher
,
T.
,
2005
, “
Performance Parameters for Grid Connected PV Systems
,” NREL,
Report No. NREL/CP-520-37358
.
14.
Whitaker
,
C. M.
,
Townsend
,
T. U.
,
Wenger
,
H. J.
,
Iliceto
,
A.
,
Chimento
,
G.
, and
Paletta
,
F.
,
1992
, “
Effects of Irradiance and Other Factors on PV Temperature Coefficients
,”
The Conference Record of the Twenty-Second
IEEE
Photovoltaic Specialists Conference, Las Vegas, NV, Oct. 7–11, pp.
608
613
.
15.
Dierauf
,
T.
,
Growitz
,
A.
,
Kurtz
,
S.
,
Cruz
,
J. L. B.
,
Riley
,
E.
, and
Hansen
,
C.
,
2013
, “
Weather-Corrected Performance Ratio
,” National Renewable Energy Laboratory, Golden, CO,
Report No. NREL/TP-5200-57991
.
16.
Choi
,
W.
,
Warren
,
R. D.
, and
Pate
,
M. B.
,
2016
, “
An Experimental Performance Analysis of a Cold Region Stationary Photovoltaic System
,”
Advances in Energy Research
,
4
(
1
), pp.
1
28
.
17.
Wald
,
L.
, and
Lefèvre
,
M.
,
2001
, “
Interpolation Schemes-Profile Method (a Process-Based Distance for Interpolation Schemes)
,” Internal Document, SoDa Deliverable D5-1-1.
18.
Zelenka
,
A.
,
Czeplak
,
G.
,
d'Agostino
,
V.
,
Josefson
,
W.
,
Maxwell
,
E.
, and
Perez
,
R.
,
1992
,
Techniques for Supplementing Solar Radiation Network Data
, Swiss Federal Office of Energy, Bern, Switzerland.
19.
Remund
,
J.
,
Mueller
,
S.
,
Kunz
,
S.
,
Huguenin-Landl
,
B.
,
Studer
,
C.
,
Klauser
,
D.
,
Schilter
,
C.
, and
Lehnherr
,
R.
,
2015
,
Meteonorm Handbook, Part II: Theory
,
Meteotest
,
Bern, Switzerland
.
20.
Choi
,
W.
,
Pate
,
M.
,
Warren
,
R. D.
, and
Nelson
,
R. M.
,
2016
, “
Effects of Operating Temperature on the Heat Transfer Characteristics of Photovoltaic Systems in the Upper Midwest
,”
ASME J. Therm. Sci. Eng. Appl.
,
8
(
3
), p.
031012
.
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