SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home ENK6-CT 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

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home 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. The SOLVENT project - aims

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home 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 The SOLVENT consortium

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home 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 2.Large glazed areas are useful in winter, but may cause over-heating in summer. In climates with cool, sunny winters and warm summers, direct gain systems have several drawbacks: Problem definition

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home 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 … Existing solutions

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Principle of operation

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Thermal model e dz W L q1q1 q2q2 z T(z) T1T1 T2T2 T i, v ToTo

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home d – pane-to-pane distance H in – inlet height H in – outlet height H – height of glazing system Aerodynamic parameters

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Integration in ESP-r Indoor Temperature Meteorological Variables Window Geometry Surface Temperatures Heat Fluxes Iterative process for calculating the film coefficients Glass Characterization

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Cottbus PASLINK test cell with SOLVENT window

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Sde Boqer ‘white house’ SOLVENT window

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Interior (right) and exterior view of test window at Sde Boqer black globe pyranometer

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Light sensors

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Interior air Sde Boqer test window, September 1, 2001

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Interior radiation Sde Boqer test window, September 1, 2001

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Sde Boqer test window, June 16, 2001 Black globe near window

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Sde Boqer test window, September 1, 2001 Glass surface temperatures (I)

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Glass surface temperatures (II) Sde Boqer test window, September 1, 2001 Exterior surface of clear glass

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home (Sde Boqer test window, September 1, 2001) Air channel temperature

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Channel airflow and wind (Sde Boqer test window, September 1, 2001)

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home Illumination (Sde Boqer, September 1, noon) exterior daylight – approx. 110,000 lux! * 3091 in reference room!

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home 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.

SOLVENT ventilated solar screen window consortium the problem solutions? principle modeling aims test data ESP-r test sites dissemination home 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’