A PHOTOVOLTAIC POTENTIAL MODEL WITH EXTENSION TO BUILDING FACADES S. Freitas 1,2, D. Martins 1, P....
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- Slide 1
- A PHOTOVOLTAIC POTENTIAL MODEL WITH EXTENSION TO BUILDING
FACADES S. Freitas 1,2, D. Martins 1, P. Redweik 3,4,5, C. Catita
3,4, C. Rodrigues 6, A. Joyce 6, M. C. Brito 3,5 1 SESUL Centre for
Sustainable Energy Systems, University of Lisbon 2 MIT Portugal -
Sustainable Energy Systems Program 3 IDL - Instituto Dom Luiz,
University of Lisbon 4 Centre of Geology, University of Lisbon 5
DEGGE Department of Geographic Engineering, Geophysics and Energy,
University of Lisboa 6 LNEG Laboratrio Nacional de Engenharia e
Geologia
- Slide 2
- Why solar potential models for the urban environment? We need
the sun Cities as great consumers of energy Nearly Zero Energy
Buildings (nZEB) Fast technological improvement of solar energy
Decreasing costs of PV Increasing public acceptance However Limited
available area Insufficient solar radiation Unfavourable
meteorological conditions Obstructions from the surroundings
Regulating Energy Efficiency in Urban Contexts The design of modern
cities must be oriented towards the taking of the full potential of
the solar resource 2
- Slide 3
- SOL: the solar potential model Light Detection And Ranging
(LiDAR) Digital Surface Model Typical Meteorological Year (SolTerm
database) Mathematical sun-path model Sky View Factor Shadow
algorithm: horizontal vs vertical surfaces Complete irradiation map
(1 hour time step, 1x1m 2 ) 3 Redweik et al, Solar Energy 97 (2013)
332-241 The algorithm:
- Slide 4
- SOL: the nouvel approach to vertical facades In modern cities,
the ratio between roof area and facade area is high Redweik et al,
Solar Energy 97 (2013) 332-241 4 Vertical PV facades will produce
relatively more power in winter and less in summer Different solar
facades of a building will produce at maximum power at different
times of the day Soiling rates will be much lower when PV panels
are vertically installed Less maintenance will be required Solar
potential doubles! What is interesting about facades?
- Slide 5
- SOL: Validation case study LNEG Solar XXI building facade 5
IST
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- 6 SOL: Validation case study - Methodology 12
- Slide 7
- 1. Measured Radiation to Photovoltaic production SOL:
Validation case study LNEG Solar XXI building facade 7 Marion, B.,
Prog. Photovol: Res. Appl.10, (2002) 264 205-214
- Slide 8
- 8 1. Measured Radiation to Photovoltaic production SOL:
Validation case study LNEG Solar XXI building facade Shadow
events
- Slide 9
- 9 1. Measured Radiation to Photovoltaic production SOL:
Validation case study LNEG Solar XXI building facade
- Slide 10
- 10 SOL: Validation case study - Methodology 12
- Slide 11
- SOL: Validation case study LNEG Solar XXI building facade
Irradiance on vertical surfaces (30th November 3pm) South Digital
Surface Model South 11 2. Individual facade assessment VS Measured
data
- Slide 12
- SOL: Validation case study LNEG Solar XXI building facade 12 3
%
- Slide 13
- Main conclusions and next steps 13 1x1m 2 radiation grid
Interpolation and smoothening to a 0.2x0.2m 2 radiation grid
Distribution of the strings on the facade Different spatial
resolutions and smoothening of shadows
- Slide 14
- In the future