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
Direct solar irra diation is shaded
Outview is allowed – transparent appearance
Enlarged picture of micro structured shading foil between sheet glass.
Exterior shading system
Solar control glass
Conventional solar shading:
(Exterior lamellas or screens)
• Efficient
• Expensive
• Cleaning and maintenance issues
The PhotoSolar concept:
(Micro-structured shading embedded in front glass)
• Same efficiency as exterior solutions
• Competitive price
• Less cleaning and no maintenance
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).
• Customized design – Size and module layout is customer specified. Full or partial coverage of glass and gradient modules are possible.
• 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.
Electrical effect on facade - comparison Conversion efficiency: 7%
Vertical installation Beam intensity: 1000W/m2
0 10 20 30 40 50 60 70
0 10 20 30 40 50 60 70 80 90
Solar angle (degrees)
Maximum effect (W/m2)
PowerShade 3D - T=0.52 Reference 2D - T=0.52 Reference 2D - T=0.1
Advantages of MicroShade IG
• Robust design – shading integrated in glazing
• Neutral in colour – no colouring of the transmitted light.
Reflected colour is dark gray or black (out side view).
• Customized design – Size and module layout is customer specified. Full or partial coverage of glass and gradient modules are possible.
• 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.
• Clean technology – no hazardous waste.
• Replaces exterior shadings – no maintenance and less cleaning.
0 0 ,05 0,1 0 ,15 0,2 0 ,25 0,3 0 ,35 0,4
1 2 3 4 5 6 7 8 9 10 11 12
Month (1-12)
Average g-value
MicroShade Type A
Solar control glass (g0=0.34)
Weather data for Copenhagen – MeteoNorm 4.0
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 by independent glazing manufacturers with succes.
• 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
Simulation of the Nordea building: Teknologisk Institut – Industry and Energy, University of Strathclyde;
supported by Eltra through PSO R&D funds.
Printed glass lamellas
Double pane window, Suncool HP
Inside Outside
Double pane window, PS5060 PV module used as front layer
Inside Outside
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
Inside Outside
PS5060
Cooling need and electrical power production, yearly
Simulation made by Teknologisk Institut BuildVISION & University of Strathclyde using the ESP-r simulation platform.
Copenhagen
-20000 -15000 -10000 -5000 0 5000 10000
Existing PS5060 Suncool
Electrical power (kWh/year)
Cooling Production
Palermo
-20000 -15000 -10000 -5000 0 5000 10000 15000
Existing PS5060 Suncool
Electrical power (kWh/year)
Cooling Production
Room temperature – June 3 (Copenhagen)
18 20 22 24 26 28 30
0 0 h 0 3 0 1 h 1 3 0 2 h 2 3 0 3 h 3 3 0 4 h 4 3 0 5 h 5 3 0 7 h 0 2 0 8 h 1 2 0 9 h 2 3 1 0 h 3 3 1 1 h 4 2 1 2 h 5 3 1 4 h 0 3 1 5 h 1 2 1 6 h 2 3 1 7 h 3 2 1 8 h 4 3 1 9 h 5 3 2 1 h 0 2 2 2 h 1 3 2 3 h 2 3
Tim e
In d o o r te m p e ra tu re ( °C )
Existing Float Suncool
PhotoSolar 5060
Simulation made by Teknologisk Institut BuildVISION & University of Strathclyde using the ESP-r simulation platform.
Copenhagen
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
0 1 2 3 4 5 6 7 8
Distance from facade (m )
Thermal input (kWh/m2)
Existing PS5060 Suncool
Comfort profile
Palermo
0 0.1 0.2 0.3 0.4 0.5 0.6
0 1 2 3 4 5 6 7 8
Distance from facade (m)
Thermal input (kWh/m2)
Existing PS5060 Suncool
Simulation made by Teknologisk Institut BuildVISION & University of Strathclyde using the ESP-r simulation platform.
