SOLVENT

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ENK6-CT1999-00019 SOLVENT Evyatar Erell and Yair
Etzion BUILDING ENERGY RESEARCH JOINT FP5
ENERGIE Info-day and ENERBUILD RTD PROJECT
MEETING 6 7 September 2001 Quality Hotel
Konserthuset, Malmö, Sweden
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The SOLVENT project - aims
The SOLVENT project

• The project aims to complete the development of
  an innovative glazing system, which is based on
  the concept of converting short-wave solar
  radiation to convective heat.
• Development of aerodynamic, thermal and optical
  models
• Design of a suitable frame
• Experimental evaluation
• Development of a design tool and guidelines for
  installation
• The expected outcome is a tested product ready
  for demonstration and commercial exploitation.

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The SOLVENT consortium
The SOLVENT consortium
Ben-Gurion University of the Negev,
ISRAEL Evyatar Erell and Yair Etzion AB Överums
Fönsterfabrik, SWEDEN Nils Carlstrom University
of Gävle, SWEDEN Mats Sandberg Asociación de
Investigación y Cooperación Industrial de
Andalucia, SPAIN Jose Luis Molina Instituto de
Engenharia Mecanica, PORTUGAL Eduardo
Maldonado Brandeburgische Technische Universitaet
Cottbus, GERMANY Olaf Gutschker
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Problem definition
Problem definition
In climates with cool, sunny winters and warm
summers, direct gain systems have several
drawbacks

• 1. Direct exposure to solar radiation often
  results in
• - visual discomfort due to glare
• - thermal discomfort due to high radiative load
• - deterioration and fading of furnishings
• Large glazed areas are useful in winter,
• but may cause over-heating in summer.

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Existing solutions
Existing solutions

• fixed shading devices
• - interfere with the view through the window and
• - reduce heating efficiency in winter
• operable shading devices
• - when deployed have same effects as fixed
  shading devices
• - when not deployed do not address thermal and
  visual stress
• tinted or reflective glazing may reduce glare,
  but also
• - reduce heating efficiency in winter and
• - may still allow too much heat to penetrate to
  the interior
• selective glazing (angle-selective,
  electro-chromic)
• - experimental, require considerable research
• - when in the transmission phase do not address
  thermal and visual stress

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Principle of operation
Principle of operation
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Thermal model
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Aerodynamic parameters
Aerodynamic parameters
d pane-to-pane distance Hin inlet
height Hin outlet height H height of
glazing system
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Integration in ESP-r
Indoor Temperature
Meteorological Variables
Window Geometry
Iterative process for calculating the film
coefficients
Glass Characterization
Surface Temperatures
Heat Fluxes
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Cottbus PASLINK test cell with SOLVENT window
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Sde Boqer white house
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Interior (right) and exterior view of test window
at Sde Boqer
pyranometer
black globe
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Light sensors
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Interior air
Sde Boqer test window, September 1, 2001
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Interior radiation
Sde Boqer test window, September 1, 2001
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Black globe near window
Sde Boqer test window, June 16, 2001
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Glass surface temperatures (I)
Sde Boqer test window, September 1, 2001
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Glass surface temperatures (II)
Sde Boqer test window, September 1, 2001
Exterior surface of clear glass
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Air channel temperature
(Sde Boqer test window, September 1, 2001)
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Channel airflow and wind
(Sde Boqer test window, September 1, 2001)
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Illumination
(Sde Boqer, September 1, 2001 - noon)
606
563
3091 in reference room!
774
625
587
478
1406
exterior daylight approx. 110,000 lux!
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Dissemination I - software and documentation
All test data to be collated and made available
on CD or by internet, in conjunction with project
reports. Academic publication of aerodynamic,
thermal and optical models. A module describing
the window is being prepared for integration in
ESP-r. Design guidelines and a computerized tool
are being developed in the project, to provide
architects with technical information required
for glazing selection.
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Dissemination II - the glazing system

• Overums Fonsterfabrik (window manufacturer) will
  promote the product by
• product catalogues
• trade fairs
• demonstration installation
• The consortium will also publicize the window
  through environmental publications and internet
  sites, such
• WIRE (ISES)
• EU web services such as MARKETPLACE