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Federation of European Heating, Ventilation and Air-conditioning Associations

Address:

Rue Washington 401050 Brussels

Belgium

www.rehva.eu

info@rehva.eu Tel: +32 2 514 11 71

Fax: +32 2 512 90 62

Federation of European Heating, Ventilationand Air Conditioning Associations

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Federation of European Heating, Ventilation and Air-conditioning Associations

Use of REHVA Guidebook

Power Point Presentations

This Power Point Presentation can be freely

used for training purposes by REHVA members.It is prepared by the main author to the REHVAGuidebook.

Please refer the original author always when

making the presentation.Inform REHVA secretariat each time thepresentation is used: info@rehva.eu

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Federation of European Heating, Ventilation and Air-conditioning Associations

SolarShading

by

Wouter Beck (ed.),Dick Dolmans,

Gonzague DutooAnders Hall

Olli Seppnen

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Federation of European Heating, Ventilation and Air-conditioning Associations

Task force Solar Shading

started 2008

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Federation of European Heating, Ventilation and Air-conditioning Associations

Table of Contents

Terminology Solar radiation

Effect of windows on indoor environment

Window systems

Energy effects of solar shading

How to choose a shading solution

Automating and integrating solar shading

Existing buildings Double-skin facades

Maintenance of solar shading systems

Cases

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Federation of European Heating, Ventilation and Air-conditioning Associations

Reviewers

Prof. Jan Hensen, Eindhoven University of

Technology, The Netherlands

Prof. Mat Santamouris, University of

Athens, Greece

Herv Lamy, SNFPSA, Paris, France

Prof. Michael G Hutchins, Sonnergy Ltd,

Abingdon, UK

Dr. Thanos Tzempelikos, Purdue

University, West Lafayette, IN, USA

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Solar radiation

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Solar paths

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Solar irradiance on a faade(lat. 50 N, clear sky)

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Solar irradiance on a faade(lat. 50 N, clear sky)

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Solar irradiance on a faade(lat. 50 N, clear sky)

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Solar irradiance on a faade(lat. 50 N, clear sky)

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Effect of windows on indoor environment

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Effect of windows on indoor

environment

Thermal comfort

Visual comfort

Acoustic comfort

Indoor air quality

Daylighting Impact of productivity

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Thermal comfort

Air temperature

Radiant temperature

Operative temperature

Relation to office

worker productivity

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Visual comfort

Contact with the outdoors

Absolute brightness

Luminance ratios

Color rendition

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Effect of good visual comfort

3.75% median productivity increase [CMU]

20 to 25% less health complaints

[Hartkopf]

15% reduced absenteeism [Thayer]

10 to 25% better performance on test of

mental function

20 to 26% faster progress of students

[Heshong]

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Predicting visual comfort

Photo: Hunter Douglas

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Predicting visual comfort

Photo: Hunter Douglas

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The economic impact of

productivity

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Window systems

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Federation of European Heating, Ventilation and Air-conditioning Associations

Glazing properties

Thermal transmittance U [W/m2K]

Light transmittance Tv [-]

g-value [-]

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Energy flows

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Convection loads

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Cooling loads no shading

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Surface temperature interior

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Federation of European Heating, Ventilation and Air-conditioning Associations

Surface temperature interior

window pane under peak load

conditions

no shading

Surface temperature interior

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Surface temperature interior

window pane under peak load

conditions

exterior shading

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Federation of European Heating, Ventilation and Air-conditioning Associations

Influence of shading on

lighting needs

Daylight illuminance in a south oriented officeautomatic Venetian blind @ 200 W/m2

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Energy effects

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Federation of European Heating, Ventilation and Air-conditioning Associations

Standard office

dimension 3.6 x 5 x 3 m

ventilation 1.5 dm3/m2s

infiltration 0.1 ACH

daylight dependent lighting 500 lx

max. internal load art. lighting 12 W/m2

internal loads people 10 W/m2

internal loads equipment 15 W/m2

thermostat cooling 25/30 C (8-18/otherwise)

thermostat heating 21/15 C (8-18/otherwise)

shading set point 200 W/m2

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Conversion to primary energy

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Federation of European Heating, Ventilation and Air-conditioning Associations

Stockholm cooling load, low-

e glazing, orientation: south

no shading

exterior shading

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Reduction in primary energy

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Federation of European Heating, Ventilation and Air-conditioning Associations

std. double

low-e

solar ctrl

Reduction in primary energy

use for heating, cooling and

lighting through shading

C t b fit l i f l

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Federation of European Heating, Ventilation and Air-conditioning Associations

Cost benefit analysis of solar

shading

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Federation of European Heating, Ventilation and Air-conditioning Associations

Central Plaza Brussels

Photo: Hunter Douglas

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Federation of European Heating, Ventilation and Air-conditioning Associations

Appendices

EU standards concerning shuttersand blinds

Specification example

Matrix of responsibilities

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Federation of European Heating, Ventilation and Air-conditioning Associations

Acknowledgements

Ellen Kohl (Warema), Maaike Berckmoes (Scheldebouw-Permasteelisa),

Risto Kosonen (Halton),

Bernard Gilmont (European Aluminium Association), Maija Virta (Halton),

Prof. Dirk Saelens (Catholic University of Leuven,

Belgium

Prof. Zoltan Magyar (University of Pcs, Hungary)

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