PVMD Olindo Isabella Delft University of Technology Learning - - PowerPoint PPT Presentation

▶

Feb 23, 2023 348 likes •482 views

Modules Spacing and Mutual Shading PVMD Olindo Isabella Delft University of Technology Learning objectives 1. PV module design 2. Electrical properties 3. Temperature effects 4. Mounting issues 1. Mutual shading and module spacing

SLIDE 1

PVMD

Delft University of Technology

Modules Spacing and Mutual Shading

Olindo Isabella

SLIDE 2

Learning objectives

1. PV module design 2. Electrical properties 3. Temperature effects 4. Mounting issues

1. Mutual shading and module spacing

Shade-free time window
Row spacing
Ground cover ratio

2. Earthing 3. Practical example of mounting issues

5. Reliability and I-V tests

SLIDE 3

Considerations

By: Richard Masenor

SLIDE 4

Module Shading

Same location, same time of the day

Winter Summer

SLIDE 5

Module Shading

Industry practice:

ptimize for 21st Dec in a certain

shade-free time window

Winter

SLIDE 6

Shade-Free Time Window

Solar Elevation

40° 30° 10° 20° 60° 50°

Solar Azimuth

30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° 360° East West

10°

10h 14h 12h 11h 13h 15h 9h 8h 7h 6h 5h 16h 17h 18h 19h

14h 10h

SLIDE 7

Module Spacing

             Row spacing, d

h l z dshadow

θM θM aS

SLIDE 8

Shade-Free Time Window

Solar Elevation

40° 30° 10° 20° 60° 50°

Solar Azimuth

30° 60° 90° 120° 150° 180° 210° 240° 270° 300° 330° 360° East West

10°

10h 14h 12h 11h 13h 15h 9h 8h 7h 6h 5h 16h 17h 18h 19h

14h 10h 152° 208°

SLIDE 9

Module Spacing

aS θM Row spacing, d

h l z dshadow

θM            Correction factor between Azimuths Rule of thumb: d ~ 3 l

SLIDE 10

Ground Cover Ratio (GCR)

(*) J. M. Gordon & H. J. Wenger; Central-station solar photovoltaic systems; (1991)

High GCR Higher system costs Low GCR Larger shade 𝐻𝐷𝑆 = 𝐵𝑠𝑓𝑏𝑄𝑊 𝑏𝑠𝑠𝑏𝑧 𝐵𝑠𝑓𝑏𝑢𝑝𝑢𝑏𝑚 𝑕𝑠𝑝𝑣𝑜𝑒

Trade-off

SLIDE 11

Recap

Solar Elevation

40° 30° 20° 60° 50°

Solar Azimuth

30° 60° 90° 120° 180° 240° 270° 300° 330° 360°

East West

10°

12h 11h 13h 15h 9h 8h 7h 6h 5h 16h 17h 18h 19h

14h 10h 152° 208°

SLIDE 12

Recap

aS θM Row spacing, d

h l z dshadow

θM