cpv solar power plants in spain

Energy Production of CPV Power Plants Energy Production of CPV Power Plants at ISFOCat ISFOC

Warren Nishikawawarren nishikawa@solfocus [email protected]

© SolFocus, Inc. 2008

Presented : International Conference on Solar Concentrators for the Generation of Electricity (ICSC – 5), November 16‐19, 2008, Palm Desert, CA USA (www.icsc5.com)

OutlineOutline

Project and Site OverviewjCPV Systems DesignCPV Power Ratings & Normalizing MethodsCPV Power Ratings & Normalizing MethodsEnergy Production: Predicted vs. ActualSummarySummary

© SolFocus, Inc. 2008Presented : International Conference on Solar Concentrators for the Generation of Electricity (ICSC – 5), November 16‐19, 2008, Palm Desert, CA USA (www.icsc5.com)

2

0.5 MW Installation at ISFOC0.5 MW Installation at ISFOC

ISFOC: World-Recognized ISFOC Headquarters at Puertollano

Concentrating Photovoltaic (CPV) Technology Site• Goal of industrializing CPV• Goal of industrializing CPV

technology• 3 MW, 7 CPV technologies

SolFocus CPV Plants• Site #1: 0.2 MWac at Puertollano

Sit #2 0 3 MW t Al• Site #2: 0.3 MWac at Almoguera• 1st Company to Complete CPV

Plants, High Feed-In Tariffs


• Grid Connected

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Site DesignSite Design

Site #1: Puertollano Site #2: Almoguera

gg

Site #1: Puertollano33 Systems200 kWac

Site #2: Almoguera54 Systems300 kWac200 kWac 300 kWac

<2% Shading<4% Shading • <2% Shading • 20 m EW/17 m NS• 2.1 Hectares

• <4% Shading • 20 m EW/15 m NS• 0.9 Hectares


4

Site #1: PuertollanoSite #1: Puertollano

Grid Connected September 2008


5

Grid-Connected September 2008

Site #1: PuertollanoSite #1: Puertollano


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SFSF--1000 Concentrator1000 Concentrator

Power Unit CPV PanelPower Unit500x Concentrator Optics

• All glass components• 35% efficiency 3J cell

CPV Panel210 W Panel

• True, on-sun rating• >23% active area efficiency• 35% efficiency 3J cell

• 85% optical efficiency• +/- 1 degree acceptance angle

• >23% active area efficiency1.1 m

1.3 m

1


7

SFSF--1000S System1000S Systemyy

6.7 m

6.9 m

6.15 kWp, 30 Panels46 m2 Aperture0.1 Degree Pointing Accuracy


8

g g y

System Peak PowerSystem Peak Power

7000Puertollano Array DC Peak Power

S ifi ti *

yy

6000

6500

7000

)

Specification*:• Array: 6.15 kWp

Measured**:

5000

5500er (W

atts DC)

• Array: 6.20 kWp

• 2% Std. Dev.

3500

4000

4500

Powe

*IEC CPV Test Conditions: 850 W/m2, 20°C Ambient

**Average 33 Systems

3000

3500

1.1

1.2

1.3

1.4

1.5

1.6

1.7

1.8

1.9

1.10

1.11

1.12

1.13

1.14

1.15

1.16

1.17 2.1

2.2

2.3

2.4

2.5

2.6

2.7

2.8

2.9

2.10

2.11

2.12

2.13

2.14

2.15

2.16

Array #


Array #

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Rated PowerRated Power

Normalized to Concentrator Standard Test Conditions 2(CSTC): 850 W/m2 DNI, 20°C Ambient Temp.

6750

7000Power Normalized at DNI Test Conditions

6750

7000Power Normalized at Temperature Test Conditions

5750

6000

6250

6500

6750

(Normalized

)

5750

6000

6250

6500

6750

C (Normalized

)5000

5250

5500

5750

700 800 900 1000

Power DC

DNI (W/ ^2)

5000

5250

5500

50 60 70 80

Power DC

Backpan Temperature

Empirical:

Theoretical:

DNI (W/m^2)Emprical Method Theorectical Method

Backpan Temperature

Empirical Method Theorectical Method

( ) [ ] ⎟⎟⎞

⎜⎜⎛

−−+++⎥⎤

⎢⎡

⎟⎟⎞

⎜⎜⎛ −−×

=Δ CSTCmeasocggg

CSTCSCmeasSCmeasCSTCi

TVEEENIITTNV 1)(ln)(0257.0

321,,

Pem p = (1+(Tmeas –TCSTC) ) * dP/dT * Pm eas * (BCS TC/Bmeas )


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Theoretical:

Results: Only 1.3% Difference

[ ] ⎟⎟⎠

⎜⎜⎝⎥

⎥⎦⎢

⎢⎣

⎟⎠

⎜⎝ meas

measocgggmeasSC

i TI)(

297 ,321,

Temperature PerformanceTemperature Performance

Array Power

pp

80Array Power Coefficient: -0.17%/°CTypical Si Panels:

70

75

ure [C]

Typical Si Panels: -0.48%/°C3x Better Than Si 55

60

65

n Tempe

ratu

TechnologyBest Performance at High Temperatures

y = ‐1.260x + 645.2

45

50

Backpa

n

g p

Array Voltage Coefficient: -1.26V/°C

445 450 455 460 465 470Array Voc (V)


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System Specifications System Specifications

30 Panels Max Output 6 3kW30 Panels Max Output 6.3kWMismatch -2%

Misalignment -1%

DC Losses -3%DC Power Spec 6.15kW

Inverter -3%Inverter 3%Dirt -2%

Downtime -1%AC Losses 6%AC Losses -6%

AC Power Spec 5.78kW


Energy Production CalculationsEnergy Production Calculations

Site #1: Site #2: Puertollano Almoguera

DNI (kWh/m2)* 5.1 5.4

kWh/kWp 2059 2180

# Systems 33 54

Rated DC Capacity (kWp) 203 332

Rated AC Capacity (kWac) 191 312Rated AC Capacity (kWac) 191 312

Annual Production (MWh) 416 728


*Solar Resources:Meteonorm, SWERA-NASA

Annual Energy ProductionAnnual Energy Productiongygy

700

800

500

600

700

300

400

MWh

100

200

Jan Feb Mar Apr May June July Aug Sept Oct Nov Dec

Site #2 Cumul 41 88 151 211 277 362 454 539 607 655 693 728

Site #1 Cumul 23 50 85 123 161 212 266 316 352 379 397 416

Site#1Monthly 23 28 34 38 38 51 54 50 36 27 18 19

0


Site #1 Monthly 23 28 34 38 38 51 54 50 36 27 18 19

Site #2 Monthly 41 46 64 59 67 84 93 85 68 48 38 35

Puertollano PerformancePuertollano Performance

125%250000Puertollano: November 10, 2008

100%200000

75%150000

Total for 33 poles

50%100000 Norm. to 850 DNI

Percent of rating

0%

25%

00000

50000


15

0%00000

8:00

8:20

8:40

9:00

9:20

9:40

10:00

10:20

10:40

11:00

11:20

11:40

12:00

12:20

12:40

13:00

13:20

13:40

14:00

14:20

14:40

15:00

15:20

15:40

16:00

16:20

16:40

17:00

SummarySummary

0.5 MWac Installed at ISFOC

yy

Systems Rated at Concentrator Standard Test Conditions (CSTC) – True, On-Sun Performance( )Systems Measured Above Specification for DC Peak PowerBeginning to Demonstrate Energy Production >95% of Predicted Output


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Other Potential CPV Benefits?Other Potential CPV Benefits?

Tested Against Tornados Hybrid CPV WindTested Against Tornados Hybrid CPV-Wind


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*Almoguera Site, August 2008

cpv solar power plants in spain

Technology

puertollano site

solfocus com solfocus

almoguera site

site designgsite

actualsummary2 solfocus

predicted output16 solfocus

potential cpv benefits

puertollano isfoc