![Page 1: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/1.jpg)
Photo by Jacob Chinn
TEP Solar Test Yard Data vs. Models
![Page 2: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/2.jpg)
Upcoming Events / Conferences on Solar Power European PV Solar Energy Conference & 5th World PV conference & 36th IEEE PVSC
Right now: Sept 6-11, Valencia Spain
Sept. 17 (alt Fridays) at 4pm. Energy Sciences Group meetings – Chemistry Solar Energy Round Table Sept.13 1-3pm on Church St – Giffords/TEP – by invitation
Solar Power International (SPI) and SEPA/ SEIA meetings. 27,000 attendees, B2B themeOctober 12-14 Los Angeles
Scialog Conference Oct.12-15 at Biosphere2.Eric Mazur, Harvard Physics, Oct. 14 3:30 Optical Science ColloquiumArun Majumdar, Director of ARPA-E, Oct. 15 4:00 Special Seminar in Koffler 218
and: Oct. 15 7:00 pm public lecture
3rd Thin Film Summit USA Nov .30-Dec.1 San Francisco Solar Power Generation: utility scale Jan.25-26 2011 Las Vegas 40th ASES May.16-21 2011 Raleigh, NC (2010 was in Phoenix)
37th IEEE PVSC June 19-24, 2011 Seattle, WA (abstracts due Feb. 28, 2011)
SPIE Optics&Photonics: Solar Energy & Technology Aug.21-25, 2011 San Diego
Lots more under: “IEEE smart grid”, “EPRI”, and “solarbuzz.com”
![Page 3: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/3.jpg)
UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex Cronin, UA Physics Associate Professor
Sept. 14 - Polymorphism in Titanyl Phthalocyanine -Implications for 3rd Gen. PV Diogenes Placencia, UA Chemistry/Biochemistry Research Graduate Associate
Sept. 21 - SOLON's Global Test Site Network Bill Richardson, Head of R & D, SOLON Corp.
Sept. 28 - Planar Holographic Concentrators for PV Dr. Jose Castro, ECE Research Asst. Prof.&Solar Distallation Dr. Leslie Frame, UA Materials Science & Engineering Research Associate
Oct. 5 - Solar Concentrators, Illumination Uniformity and Conversion Efficiency Alan Kost, UA CIAN Engineering Research Center Administrative Director
Oct. 12 - Nanoarchitectured Polymers and Polymer Nanocomposites for Photovoltaic Applications Dr. Bob Norwood, UA Optical Sciences Professor
Oct. 19 - Water and Land Requirements for Solar Energy in the Southwest George Frisvold, UA Agricultural-Resource Economics Specialist
Nov.2 Dr. Susan Lysecky, UA ECE Asst. Prof. , Dr. Janet Wang, UA ECE Asst. Prof.
Nov.9 Scott Wiedeman, Chief Scientist, Global Solar Energy Inc.Dr. Leslie Frame, UA MSE Research Associate
Nov 16 Dr. B.G. Potter, UA MSE Professor.
![Page 4: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/4.jpg)
We’ve had over 2,000 visitors and given public lectures to over 6,000 peopleat the TEP Solar Test Yard --- Contact: Deanna Lewis: www.uapv.org
![Page 5: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/5.jpg)
Photo by Jacob Chinn
TEP Solar Test Yard Data vs. Models
![Page 6: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/6.jpg)
TEP Solar Test Yard Data vs. Models
Project Objectives:• Evaluate new PV system technologies• Monitor performance of grid-tied PV systems• Report Energy Yields and Degradation Rates of PV systems• Assess Models that Forecast PV generation.
Alex Cronin, UA Physics / Optical Sciences
Students:
Vincent Lonij , Daniel Cormode, Nick Davidson, Ryan Price , Deanna Lewis, Steve Pulver NiketThakkar, Alex Hickey, Adria Brooks, Tucker Bundgard, Ingrid Noche
Support From:
Tucson Electric Power, AZRISE, Biosphere 2, SOLON Corporation, NREL, UA Graduate College, Science Foundation Arizona, NASA Space Grant Consortium, Prism Solar Technologies
Collaborators:
Bill Henry, Chris Lindsey, and Co. - TEP
Ray Kostuk, Bill Conant, Joe Simmons, Warren Beck, Nate Allen, Pierre Meystre – UA
Sarah Kurtz, Dirk Jordan, Ryan Smith - NREL
Mark Shields, Ben Bourne – SunPower
![Page 7: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/7.jpg)
TEP Solar Test Yard Data vs. Models
Project Objectives:• Evaluate new PV system technologies• Monitor performance of grid-tied PV systems• Report Energy Yields and Degradation Rates of PV systems• Assess Models that Forecast PV generation.
Alex Cronin, UA Physics / Optical Sciences
Students:
Vincent Lonij , Daniel Cormode, Nick Davidson, Ryan Price , Deanna Lewis, Steve Pulver NiketThakkar, Alex Hickey, Adria Brooks, Tucker Bundgard, Ingrid Noche
Support From:
Tucson Electric Power, AZRISE, Biosphere 2, SOLON Corporation, NREL, UA Graduate College, Science Foundation Arizona, NASA Space Grant Consortium, Prism Solar Technologies
Collaborators:
Bill Henry, Chris Lindsey, and Co. - TEP
Ray Kostuk, Bill Conant, Joe Simmons, Warren Beck, Nate Allen, Pierre Meystre – UA
Sarah Kurtz, Dirk Jordan, Ryan Smith - NREL
Mark Shields, Ben Bourne – SunPower
![Page 8: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/8.jpg)
![Page 9: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/9.jpg)
![Page 10: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/10.jpg)
![Page 11: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/11.jpg)
![Page 12: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/12.jpg)
![Page 13: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/13.jpg)
![Page 14: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/14.jpg)
![Page 15: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/15.jpg)
TEP PV test yard4350 E. Irvington Rd.
![Page 16: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/16.jpg)
![Page 17: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/17.jpg)
TEP Solar Test Yard Data vs. Models
Project Objectives:• Evaluate new PV system technologies & Compare to Traditional flat plate PV• Monitor performance of grid-tied PV systems• Report Energy Yields and Degradation Rates of PV systems• Assess Models that Forecast PV generation.
![Page 18: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/18.jpg)
TEP Solar Test Yard Data vs. Models
Project Objectives:• Evaluate new PV system technologies & Compare to Traditional flat plate PV• Monitor performance of grid-tied PV systems• Report Energy Yields and Degradation Rates of PV systems• Assess Models that Forecast PV generation.
![Page 19: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/19.jpg)
AC Output every minute shown for 2 days:
Data on-line at: www.UAPV.orgSee:
interactive graphs, database tables, download pg.
![Page 20: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/20.jpg)
![Page 21: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/21.jpg)
![Page 22: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/22.jpg)
![Page 23: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/23.jpg)
![Page 24: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/24.jpg)
( ) [ ] ( )[ ] [ ]321 120)(1)(ˆˆ
exp)(ˆ ptCtTpptSpu
AtSY yearsaSTCf ×−×°−−××
⋅−
⋅= ∫ ηα
A simple model for production basedon a solar position algorithm, Ambient temperature de-rating, and overall system degradation.
Yields Relative Yields
![Page 25: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/25.jpg)
Measured Degradation Rates
![Page 26: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/26.jpg)
![Page 27: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/27.jpg)
Measured Yields (kWh/kWp)
![Page 28: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/28.jpg)
Comparison of final yields in 6 places
![Page 29: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/29.jpg)
Measured Efficiency for 9 systems in Feb.
![Page 30: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/30.jpg)
TEP Solar Test Yard Data vs. Models
Project Objectives:• Evaluate new PV system technologies & Compare to Traditional flat plate PV• Monitor performance of grid-tied PV systems see www.UAPV.org• Report Energy Yields and Degradation Rates of PV systems Big Spreads!• Assess Models that Forecast PV generation.
![Page 31: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/31.jpg)
TEP Solar Test Yard Data vs. Models
Project Objectives:• Evaluate new PV system technologies & Compare to Traditional flat plate PV• Monitor performance of grid-tied PV systems see www.UAPV.org• Report Energy Yields and Degradation Rates of PV systems Big Spreads!• Assess Models that Forecast PV generation.
![Page 32: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/32.jpg)
A more detailed model: efficiency has an irradiance coefficient, and a temperature coefficient
![Page 33: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/33.jpg)
Efficiency every minute of the day x 1 year of sunny days
![Page 34: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/34.jpg)
120 system-years (daily kwh/kwp)
![Page 35: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/35.jpg)
120 system-years (daily kwh/kwp)
Show distributionsIn Igor Pro
![Page 36: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/36.jpg)
PV output simulation programs:PVSS (1977) SOLCEL (1977) PVSOLSTOR (1979) PV, wind & storagePVForm (1985) systems approach to PV, LCOE predictor, battery models too.PVSIM (1996) better electrical description of PVPVMOD (1998) empirical charactarization of modules
PVDesignPro (MSES Corp. software 2004)Sandia (SNL) model
Solar Advisory Model (SAM) by NREL and SNLHysim (1996) military PV + diesel + batteryHybsim (2003) PV + diesel + battery + wind
4-parameter one diode model (1989) TRNSYS (1990) … 5-parameter Array Performance Model (Wisconsin, CEC)
(DeSoto 2004, 2006) PV F-chart (Wisconsin 1985, 2001)PVWatts (v1, v2, IMBY tool, CSI EPBB Calculator) PVSYST (Geneva, since 1995, current version 5.2)RETScreen PV Project Model – economics and environmental impactsPVSol (since 1998, v4 in 2009)Polysun (Vela Solaris, Switzerland, 2009) economics include: financing, O&M
costs, incentives, energy prices, fuel cost savings and system valueINSELSolarPro (Japan 1997) For a Review see Sandia 8258
![Page 37: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/37.jpg)
Models for Irradiance (on POA):
Liu 1963 (isotropic sky) Hay 1979Davies and Hay 1980 (anisotropic sky)Perez 1987, 1988,
Models often use data from: Meteonorm, satellite, TMY2/3, ISM-EMPA, Helioclim-1 NASA-SSE, WDRC, PVGIS-ESRA
![Page 38: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/38.jpg)
Shell ST40 (CIS)Unisolar US64 (3J a-Si)
PVsyst Outputs
![Page 39: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/39.jpg)
PR = 0.77
Unisolar US64 (3J a-Si) Shell ST40 (CIS)
PR = 0.69
PR = “performance ratio” =2 W/m1000
indicentkWh kWp
generatedkWh
PVsyst Outputs
![Page 40: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/40.jpg)
Look at PVWatts online.Look at PVsyst on this PC.
![Page 41: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/41.jpg)
Slide reproduced from Chris Cameron 2009 workshop on PV modeling
![Page 42: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/42.jpg)
(in)stability of the solar resource
Daily totals of solar radiation were averaged with a 365-day wide boxcar filter to remove seasonal variations. The resulting 48-year history shows a 3% rms fluctuation and a range (max-min) that is 15% of the average.
From the low irradiance in 1992 (after the Mt. Pinatubo eruption) until 1996, the annual irradiance increased 13% over 4 years. This 3 %/yr change in reference yield is one of the challenges for studying absolute degradation rates for PV systems.
![Page 43: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/43.jpg)
Insolation correlations across AZ
![Page 44: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/44.jpg)
More fluctuations at higher latitude
![Page 45: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/45.jpg)
TEP Solar Test Yard Data vs. Models
Project Objectives:• Evaluate new PV system technologies & Compare to Traditional flat plate PV• Monitor performance of grid-tied PV systems see www.UAPV.org• Report Energy Yields and Degradation Rates of PV systems Big Spreads!• Assess Models that Forecast PV generation. PVsyst, Pvwatts, Sandia, CEC 5-p
![Page 46: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/46.jpg)
TEP Solar Test Yard Data vs. Models
Project Objectives:• Evaluate new PV system technologies & Compare to Traditional flat plate PV• Monitor performance of grid-tied PV systems see www.UAPV.org• Report Energy Yields and Degradation Rates of PV systems Big Spreads!• Assess Models that Forecast PV generation. PVsyst, Pvwatts, Sandia, CEC 5-p.
Concluions / Outlook:• Installed 5 new TEP systems and 5 new SOLON systems since 2009.• Presented degradation and partial-shade studies at PVSC 2010.• Working with test yards at NREL, Sandia, Stuttgart, Cyprus, SOLON (x3).• PV watts is usually within 10%. PVsyst is better but $800 & “Experts only”• Sandia claims to be within 1%, given weather data.• Goal: report new technology model coefficients for affiliates• Outreach / Education Agenda – see final slide
![Page 47: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/47.jpg)
Tours: we’ve had over 2,000 visitors since 2009,and given public lectures to over 6,000 people
To learn more about outreach at TEP solar test yard:Energy Sciences Group Meeting: Sept 17 4pm.
![Page 48: TEP Solar Test Yard Data vs. Models - University of Arizonacronin/Solar/Seminars2010Fall/solar... · UA Solar Seminar Series Sept. 7 - TEP Solar Test Yard Data vs. Models. - Alex](https://reader036.vdocuments.mx/reader036/viewer/2022081521/5ae917357f8b9a0877908f07/html5/thumbnails/48.jpg)
Thanks.