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ESTIMATION OF THE PERFORMANCE OF SUNSHADES USING OUTDOOR MEASUREMENTS AND

Bülow-Hübe, Helena LU ; Hellström, Bengt and Kvist, Hasse (2003) ISES Solar World Congress 2003, p.1-6
Abstract
Solar shading devices can significantly reduce cooling loads, improve thermal comfort and

reduce potential glare problems in commercial buildings. However, measured data or tools to facilitate a

comparison among various shading devices have previously not been available to designers. The Solar

Shading Project at Lund University was initiated in 1997 to increase the knowledge on shading devices.

This paper describes results from an extensive measurement program and recent developments of the

software tool ParaSol v 2.0. The total solar energy transmittance (g-value) of various shading devices has

been estimated by means of measurements in a real climate using a double hot-box... (More)
Solar shading devices can significantly reduce cooling loads, improve thermal comfort and

reduce potential glare problems in commercial buildings. However, measured data or tools to facilitate a

comparison among various shading devices have previously not been available to designers. The Solar

Shading Project at Lund University was initiated in 1997 to increase the knowledge on shading devices.

This paper describes results from an extensive measurement program and recent developments of the

software tool ParaSol v 2.0. The total solar energy transmittance (g-value) of various shading devices has

been estimated by means of measurements in a real climate using a double hot-box arrangement.

Monitored results are shown for external products (awnings, Italian awnings, venetian blinds, horizontal

slatted baffle, fabric screens, solar control films), interpane (between panes) and internal products

(pleated curtains, roller blinds, venetian blinds, solar control films). The software tool ParaSol has been

further developed to include all these types of products. In general, external shading devices are the best

in reducing cooling loads, internal products are the worst, while interpane products fall between these

two. Further, internal products must have a high reflectance in order to yield a low g-value. The

monitored average g-value within each group (g-sunshade) was 0.3 for external products, 0.5 for

interpane products and 0.6 for internal products. On average, external products are twice as good as

internal products in reducing peak cooling loads. With the software tool ParaSol, it is possible to estimate

the effective g-value of shading devices for various orientations in combination with an arbitrary glazing

system. Further, effects on heating and cooling (both peak loads and annual energy demands) and

operative temperatures of an office room can also be simulated. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to conference
publication status
submitted
subject
keywords
cooling loads, ParaSol, thermal comfort, Sunshade
pages
1 - 6
conference name
ISES Solar World Congress 2003,
language
English
LU publication?
yes
id
b3b19134-2bca-4de5-a3ad-57792cca933f (old id 699802)
date added to LUP
2007-12-13 16:17:50
date last changed
2016-04-16 12:22:24
@misc{b3b19134-2bca-4de5-a3ad-57792cca933f,
  abstract     = {Solar shading devices can significantly reduce cooling loads, improve thermal comfort and<br/><br>
reduce potential glare problems in commercial buildings. However, measured data or tools to facilitate a<br/><br>
comparison among various shading devices have previously not been available to designers. The Solar<br/><br>
Shading Project at Lund University was initiated in 1997 to increase the knowledge on shading devices.<br/><br>
This paper describes results from an extensive measurement program and recent developments of the<br/><br>
software tool ParaSol v 2.0. The total solar energy transmittance (g-value) of various shading devices has<br/><br>
been estimated by means of measurements in a real climate using a double hot-box arrangement.<br/><br>
Monitored results are shown for external products (awnings, Italian awnings, venetian blinds, horizontal<br/><br>
slatted baffle, fabric screens, solar control films), interpane (between panes) and internal products<br/><br>
(pleated curtains, roller blinds, venetian blinds, solar control films). The software tool ParaSol has been<br/><br>
further developed to include all these types of products. In general, external shading devices are the best<br/><br>
in reducing cooling loads, internal products are the worst, while interpane products fall between these<br/><br>
two. Further, internal products must have a high reflectance in order to yield a low g-value. The<br/><br>
monitored average g-value within each group (g-sunshade) was 0.3 for external products, 0.5 for<br/><br>
interpane products and 0.6 for internal products. On average, external products are twice as good as<br/><br>
internal products in reducing peak cooling loads. With the software tool ParaSol, it is possible to estimate<br/><br>
the effective g-value of shading devices for various orientations in combination with an arbitrary glazing<br/><br>
system. Further, effects on heating and cooling (both peak loads and annual energy demands) and<br/><br>
operative temperatures of an office room can also be simulated.},
  author       = {Bülow-Hübe, Helena and Hellström, Bengt and Kvist, Hasse},
  keyword      = {cooling loads,ParaSol,thermal comfort,Sunshade},
  language     = {eng},
  pages        = {1--6},
  title        = {ESTIMATION OF THE PERFORMANCE OF SUNSHADES USING OUTDOOR MEASUREMENTS AND},
  year         = {2003},
}