PhotoSolar -- PowerShade / MicroShade

Energy-efficient building
PowerShade
MicroShade
PhotoSolar PowerShade and MicroShade
Søren Jensen, R&D engineer, PhotoSolar ApS
Contents
• Introducing the PhotoSolar concept
• Introduction to the products
• Advantages of PowerShade
• Advantages of MicroShade
• Pictures from pilot installations
• The Nordea case simulation
• More information
Conventional solar shading
- and the PhotoSolar alternative
Conventional solar shading:
The PhotoSolar concept:
(Exterior lamellas or screens)
(Micro-structured shading embedded in front glass)
• Efficient
• Same efficiency as exterior solutions
• Expensive
• Competitive price
• Cleaning and maintenance issues
• Less cleaning and no maintenance
Direct solar irra diation is shaded
Exterior shading system
Outview is allowed – transparent
appearance
Solar control glass
Enlarged picture of micro structured
shading foil between sheet glass.
PowerShade and MicroShade
Product Introduction
PowerShade IG – Combined solar shading and transparent photovoltaics
•
Shades excess solar radiation from the facade and converts to green power
•
Novel and patented photovoltaic technology with improved efficiency
•
Fully integrated in double or triple layer glazing
•
Strong shading character
MicroShade IG – Glazing-integrated solar shading
•
Efficient shading – may replace exterior shading devices
•
No maintenance and reduced need for facade cleaning
•
Robust structure
Advantages of PowerShade IG
• High Efficiency – The 3D PV technology provides more
power than 2D PV modules with same transparency.
• Neutral in colour – no colouring of the transmitted light.
Reflected colour is dark gray or black (outside view).
Electrical effect on facade - comparison
Conversion efficiency: 7%
Vertical installation
Beam intensity: 1000W/m2
70
PowerShade 3D - T=0.52
• Electrical output – 50 kWh/m2 per year when mounted
in vertical facade.
• Simple installation and robust products – no moving
parts, sensitive parts are protected by glass structure.
• Clean technology – no hazardous waste.
60
Reference 2D - T=0.52
Maximum effect (W/m2)
• Customized design – Size and module layout is
customer specified. Full or partial coverage of glass and
gradient modules are possible.
50
Reference 2D - T=0.1
40
30
20
10
0
0
10
20
30
40
50
60
Solar angle (degrees)
70
80
90
Advantages of MicroShade IG
• Robust design – shading integrated in glazing
MicroShade Type A
• Neutral in colour – no colouring of the transmitted light.
Reflected colour is dark gray or black (out side view).
Solar control glass (g0=0.34)
0,4
0 ,35
• Progressive shading – effective g-value in the range
from 0.12 to 0.36. Low in summer – high in winter.
• Simple installation and robust products – no moving
parts, sensitive parts are protected by glass structure.
0,3
Average g-value
• Customized design – Size and module layout is
customer specified. Full or partial coverage of glass and
gradient modules are possible.
0 ,25
0,2
0 ,15
0,1
0 ,05
0
1
• Clean technology – no hazardous waste.
2
3
4
5
6
7
8
9
Month (1-12)
Weather data for Copenhagen – MeteoNorm 4.0
• Replaces exterior shadings – no maintenance and less
cleaning.
10
11
12
Pilot installations and testing - MicroShade
• Test programme – thermal performance has been
tested by the Danish Technological Institute in full-scale
installations for more than 18 months.
• Manufacturing technology has been tested
independent glazing manufacturers with succes.
by
• EN1279 testing in progress – final approval expected in
December 2008.
• 25 m2 of prototype glazing has been installed and
subjected to visual judgement by more than 100
independent valuators.
• MicroShade IG is ready for sale – project orders are
accepted by PhotoSolar and initial glass industry
partners.
Shading and solar power envelope
Nordea case
Case study – The Nordea building
Printed glass
lamellas
Outside
Double pane
window,
Suncool HP
Inside
Double pane window,
PS5060 PV module
used as front layer
Outside
Simulation of the Nordea building: Teknologisk Institut – Industry and Energy, University of Strathclyde;
supported by Eltra through PSO R&D funds.
Inside
The existing solar shading
•
•
•
Exterior solar shades in combination with solar control glass.
Exterior solar shades are movable in 7 steps, controlled automatically.
Solar control glass is state of the art - Pilkington Suncool HP Brilliant.
The PhotoSolar alternative
Double pane window,
PS5060 PV module
used as front layer
Outside
Inside
PS5060
Cooling need and electrical power production, yearly
Cooling
Copenhagen
Production
Electrical power (kWh/year)
10000
5000
0
-5000
Existing
PS5060
Suncool
-10000
-15000
Cooling
Palermo
Production
-20000
Electrical power (kWh/year)
15000
10000
5000
0
-5000
Existing
-10000
-15000
-20000
Simulation made by Teknologisk Institut BuildVISION & University of Strathclyde using the ESP-r
simulation platform.
PS5060
Suncool
Room temperature – June 3 (Copenhagen)
30
Existing
Indoor temperature (°C)
28
Float
Suncool
26
PhotoSolar 5060
24
22
20
Tim e
Simulation made by Teknologisk Institut BuildVISION & University of Strathclyde using the ESP-r
simulation platform.
23h23
22h13
21h02
19h53
18h43
17h32
16h23
15h12
14h03
12h53
11h42
10h33
09h23
08h12
07h02
05h53
04h43
03h33
02h23
01h13
00h03
18
Comfort profile
Copenhagen
Existing
PS5060
0.7
Suncool
0.5
0.4
Palermo
0.3
0.6
0.2
0.5
Existing
PS5060
0.1
0
0
1
2
3
4
5
Distance from facade (m )
6
7
8
Thermal input (kWh/m2)
Thermal input (kWh/m2)
0.6
Suncool
0.4
0.3
0.2
0.1
0
0
1
2
3
4
5
Distance from facade (m)
Thermal energy flux into the building
(kWh/m2) vs. distance from facade
Simulation made by Teknologisk Institut BuildVISION & University of Strathclyde using the ESP-r
simulation platform.
6
7
8
Direct conclusions of the Nordea case
•
The shading efficiency of PowerShade and MicroShade nearly
equals the existing solution on the building in which both
external blinds and solar control glass is used.
•
PowerShade and MicroShade provides more shading than
solar control glass – and may replace exterior shading
devices.
•
The temperature profile is equal to that found for the existing
solution.
•
The comfort profile is identical to that of the existing solution
and better than solar control glass.
•
The potential power production of the PowerShade module
approximates the need for electrical energy to drive the cooling
of the building.
More information - www.photosolar.dk
Downloads currently available
• General information – MicroShade IG (Danish)
• Technical data sheet – MicroShade IG (Danish)
• Be06 calculation routine - MicroShade IG (Danish)
PhotoSolar ApS
Gregersensvej 1
2630 Taastrup
Denmark
phone: +45 22 67 36 13
fax: +45 72 20 32 03
[email protected]
www.photosolar.dk