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Architectural Solutions

Solar Shading Systems

Introduction

INTRODUCTION

Excessive solar heat gain and solar glarecan be a costly and unwanted hindrancefor building owners. In addition, BuildingRegulations Approved Document L2 nowrequires designers to reduce heat gain, withsolar shading recommended as apreventative measure unless glass areasare minimised.

Colt solar shading systems offer designersthe opportunity for distinctive architecturalimpact, whilst reducing solar heat gains.

SOLAR RADIATION & LOUVRES

External solar shading is one of the mosteffective ways to control the internalconditions of a building.

Radiation from the sun is transmitted,absorbed and reflected by the louvres. As a result solar heat gain is preventedfrom passing into the building, minimisingventilation requirements and reducingcooling loads. If a controllable system isinstalled, adjustable louvres track theposition of the sun, thereby reducing thenumbers of days when the buildingoverheats. Equally, in winter the louvresmay be adjusted in such a way that thebuilding benefits from the heat from thesun, and they can be closed at nightreducing heat loss.

At the same time, daylight levels areenhanced, and at the same time levels ofglare are reduced.

COLT’S OFFER

� Calculation of sun angles and heat loads.

� Selection of the most appropriate system from a wide range of options.

� Louvre panels are available in various configurations, materials, finishes and coatings to meet the requirements of almost any project.

� Three advanced control options are available, ICS 4-Link for large or medium sized projects, Soltronic for smaller projects, and the innovative Girasol thermohydraulic system, which requires no external energy source.

� All systems are durable and reliable with low maintenance needs.

Solar radiation= 100%

Light= 100%

Reflected radiation

Absorbed radiation

Radiation throughthe glass

Radiation withinthe building

COLT’S TRACK RECORD

Colt has more than 40 years experience in designing solar shading solutions.

With operating companies locatedworldwide, Colt has a broad productportfolio to meet your needs.

Colt was the first to incorporate electricitygenerating photovoltaic cells into solarshading louvres.

Colt understands that a low energybuilding fails on its weakest link, so it canprovide integrated solutions that covermany aspects of design includingdaylighting and natural ventilationsolutions.

Colt is dedicated to innovation and has a comprehensive design capability,including prototyping and testing facilities.We would welcome the opportunity todevelop solutions to match your uniquerequirements.

SOLAR SHADING SYSTEMS LEAFLET

This leaflet shows the different systemsColt can offer. Firstly, the five standardcarrier systems are outlined. Then thedifferent louvre types are shown.

Front Page: Berlaymont, Brussels

Over 22,000m2 of controllable Colt Shadoglass louvres were installed onto the European Commission Headquarters. These act as ahigh performance secondary facade. The control system was supplied by Colt and adjusts the position of the louvres in response tochanging climatic conditions and available daylight.

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100

90

80

70

60

50

40

30

20

10

00600

07000800

09001000

11001200

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19002000

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.

100

90

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09001000

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. . . . . . ....

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GMT Time (h)

SUN PATH DIAGRAMS

East facade South facade

Louvre angle in summer (June)

Louvre angle in winter (Dec)

Sun altitude in summer

Sun altitude in winter

Notes: 1.When louvre angle > 90o - facade is in the shade. 2. Normally the angle of the louvre follows the VSA (vertical shadow angle). When shading is notrequired (i.e. when facade is in the shade or when the sky is overcast), the louvres may be set for maximum daylight entry or vision to the outside, or are closed fornight security and improved insulation.

TOTAL CONTROL

Although fixed solar shading performs well on a South facing facade,performance is dramatically reduced on a East or West facing facade whichreceives a large amount of sunshine during the day.

A controllable shading system can best overcome this problem. Suntracking louvres follow the path of the sun, making sure the solar shadingsystem always optimises the amountof daylight entry.

On dull or overcast days the louvres are controlled in such a way that ifclouds pass over the building, the louvres will automatically open tomaximise daylight entry and then later revert back to their originalposition.

The Sun path diagram (right) for latitude 52oN shows the position of the

sun throughout the day during the months of June, March/September andDecember.

360o10o

20o

30o

40o

50o

60o

70o

80o

90o

100o

110o

120o

130o

140o

150o

160o

170o180o190o

200o

210o

220o

230o

240o

250o

260o

270o

280o

290o

300o

310o

320o

330o

340o350o

20:00

18:00

16:00

14:00

12:00

10:00

08:00

06:00

04:00

18:00

16:00

14:00

12:00

12:00

10:00

08:00

06:00

10:0014:00

June

March andSeptember

December

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Carrier System 1

CARRIER SYSTEM 1

Intended for wider spans, carrier system 1incorporates a central aluminium torsiontube along the length of the louvre, and isideal for continuous facades, as well as forroofs.

For glass, cross sectional louvre widthsfrom 300mm and up to 600mm areavailable.

This carrier system is also suited for usewith metal, fabric, wood, terracotta clayand translucent acrylic louvres.

LS1 - 55

2500

300 - 500

60

10

0 - 100

55

LS1 - 65A

3300

350 - 550

60

10

0 - 100

65

LS1 - 65B

3300

420 - 600

60

10

0 - 100

65

Dimensions

A mm (max)

B mm

C mm

D mm

Angle of rotation o

Torsion tube Ø mm

A

C D

B

220

300

352

65A

65B

55

Note: Table to be used as a guide only. Allowable dimensions depend upon the specificrequirements of the project.

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Glass Parameters Table

Carrier System 2

CARRIER SYSTEM 2

Primarily intended for smaller spans orwhere frequent anchor points areavailable, carrier system 2 providesminimum obstruction to the glass area,thereby maximising daylight andenhancing the view to the outside.

For glass, carrier system 2 is availablewith cross sectional louvre widths of upto a maximum of 500mm.


LS2-30

2000

500

60

10

1700

0 - 100

Dimensions

A mm (max)

B mm

C mm

D mm

E mm

Angle of rotationo

LS2-30l

2000

500

60

10

1700

0 - 100

220

220

Plan view of LS2-30 bracket

Plan view of LS2-301 bracket

E

A

CD

B


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CARRIER SYSTEM 3

Like System 1, carrier system 3 isintended for wider spans and incorporatesa discreet central aluminium torsion tubealong the length of the louvre. It is idealfor continuous facades as well as forroofs.

For glass, louvre spans of up to 4000mmlong can be achieved without anyadditional supporting structure.

Glass louvres can have a cross sectionalwidth of up to 600mm.


LS3

4000

600

60

5

0 - 100

Dimensions

A mm (max)

B mm

C mm

D mm

Angle of rotationo

A

CD

B

38 mm

Torsion Bar


Carrier System 3

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CARRIER SYSTEM 4

Carrier systems 1, 2 ,3 and 5 are pivotedsystems which require the supports to beconnected to each side of the louvre.System 4 provides a back hung designsolution with hidden control mechanismsintegrated within the main verticalsupports. This allows for seamlesscontinuous louvres with unobtrusivesupports when viewed from the outside,due to the louvres being installed in frontof the supports.

For glass, carrier system 4 is suitable forsmaller spans of up to 1800mm in length.It can utilise cross sectional louvre widthsof up to 600mm, incorporatingphotovoltaic cells if required.


A

C

D

B

LS4

1800

600

65

10

0 - 90

Dimensions

A mm (max)

B mm

C mm

D mm

Angle of rotation o

Carrier System 4

90o

45o

0o

10



CARRIER SYSTEM 5

Carrier system 5 is a fully centre pivotedsystem which provides maximumtransparency. Louvres are supported ateach end by a bonded and extruded endcap.

For glass, louvre spans of up to 1800mmlong can be achieved without anyadditional support work. This system canutilise cross sectional louvre widths of upto 600mm.

System 5 is ideal for either horizontal orvertical applications.


LS5

1800

600

50/60

10

0 - 100

Dimensions

A mm (max)

B mm

C mm

D mm

Angle of rotationo

A

CD

B


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Carrier System 5


Shadoglass

Shadoglass describes a fixed orcontrollable external solar shading systemthat incorporates glass louvres. AShadoglass shading system can reducesolar heat gain, lower air conditioningrunning costs, and lessen glare whilstmaximising the use of natural daylight.The glass louvres are available in variouscolours, surface finishes and coatings tomeet specific design requirements. Thisenables the designer to control the qualityof light entering the building.Photovoltaiccells may be integrated into the glass soas to obtain further energy benefits.

Features and benefits

� Available as standard in widths of up to600mm.

� Available in unsupported spans of up to2m, supported spans of up to 4m (depending on windloads and other criteria).

� Wide range of colours, surface finishes and coatings.

� All principal support components manufactured from corrosion-resistant extruded aluminium alloy with stainlesssteel fixings.

� Fixed or controllable.

� May permit the integration of photovoltaic cells.

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Shadovoltaic describes a fixed orcontrollable external solar shading systemthat incorporates glass louvres withphotovoltaic cells integrated into the glassso as to generate electricity at the sametime as providing shading. The louvresare available in various colours, surfacefinishes, patterns and coatings to meetspecific design requirements.

Both monocrystalline and polycrystallinecells may be used. The photovoltaic cellsmay be integrated into the glass, either byattaching them onto the reverse side ofthe glass panels or by laminating thembetween two sheets of glass.

Features & benefits

� Combines the functions of solar shading with the generation of electrical power.

� Available in widths of up to 600mm.

� Available in supported spans of up to 4m (depending on windloads and other criteria).

� Wide range of colours, surface finishes,cell patterns and coatings.

� All principal support components manufactured from corrosion-resistant extruded aluminium alloy with stainless steel fixings.

� Fixed or controllable.

Shadovoltaic

Shadotex

Shadotex is a unique, alternative solarshading solution. It consists of a specialfabric stretched between two sides of alouvre support frame. The fabric ismanufactured with a weave to preventsolar glare and solar heat gain. The fabriccan also create attractive diffused lightand can allow high external vision.

This type of product is extremelylightweight which allows large spans tobe constructed without the need foradditional supporting framework.

This system offers building designers aunique solution to external solar shadingsystems.

Features & benefits

� Modern & unique design.

� Optional fabric choice.

� High solar absorption.

� High solar reflection.

� Lightweight construction - ideal for large spans.

� Good external vision.

� A wide range of colours.

� Easy to clean (since it is resin/teflon coated).

Please refer to the ‘Shadotex’ leaflet formore details.

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Shadometal is a fixed or controllableexternal solar shading system that may beinstalled either vertically or horizontallyonto the building facade or roof. It maybe combined with other Colt productssuch as rooflights and glazed facades.Shadometal can reduce solar heat gain,lower air conditioning running costs, andlessen glare whilst maximising the use ofnatural daylight.

Features and benefits

� Fins available as standard one-piece extrusions in widths up to 400mm and as multiple clipped together extrusions in widths up to 1050mm.

� Available in unsupported spans of up to 6m, supported spans of up to 10m (depending on windloads and other criteria).

� Can be perforated for improved light transmission.

� A wide range of standard profiles and bespoke profiles and designs can be developed on larger projects.

� All principal components manufacturedfrom corrosion-resistant extruded aluminium alloy with stainless steel fixings.

� Shadometal is either fixed or controllable.

Please refer to the ‘Shadometal’ leaflet formore details.

Shadometal

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Specially designed in collaborationwith you to meet your specific projectrequirements on larger projects.

Bespoke Louvre Systems

Colt Solar Shading systems may be controlled in three different ways:

� Hand control via lever or crank handle.� Electrically operated via actuators, which require a controller such as ICS 4-Link, SolTronic or a client BMS.� Self powered via a thermal hydraulic controller Colt Girasol. This operates autonomously and requires no additional source of

power other than the sun.

GIRASOL

Girasol operates solar shading louvreswithout the need for electrical power or asophisticated control system.

Absorber tubes, enclosed by mirrors,force a hydraulic cylinder to open or closethe louvres according to the position ofthe sun.

SOLTRONIC

SolTronic is ideally suited for small tomedium sized projects.

It is a simplified version of ICS 4-Linkand can control up to ten actuators in anysingle zone.

It responds to external weather conditionsautomatically calculating the position ofthe sun, and adjusts the position of thelouvres accordingly.

ICS 4-LINK

ICS 4-Link is ideally suited to largerprojects with more complex controlrequirements.

It is a generic control system that canoperate HVAC, smoke control and solarshading systems.

It has a wide variety of operating modes,including sun tracking, daylightingoptimisation and PV illumination. Itresponds to timers and sensors to ensurethat the building ‘reacts’ appropriately tothe sun’s position and to the weather.

Remote operation is available via aninternal modem interface and a manualoverride is also possible.

Tubes are filled with a special hydraulic fluid and as the

sun moves over the building, there will be an imbalance of

heat between the two tubes and the louvres will open or

close as appropriate

Actuator

Girasol System

Solar Shading System

AAAA

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Controls

COLT SERVICE

Part of the Colt Group of companies, ColtService offers a comprehensive range of maintenance packages incorporating the maintenance and repair of all building services equipment including non Colt products.

Colt Service provide a 24 hour, 365 day emergency cover as standard.

MAINTENANCE & TESTING

Colt solar shading systems requirevirtually no maintenance.

All components of any system should be serviced at least once a year and tested monthly.

COMMISSIONING

Proper commissioning by experts isessential. We recommend that ourspecialist staff commission and certify thesystem.

Subj

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Pub

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PD 4

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Colt International LimitedNew Lane HavantHampshire PO9 2LYTel +44(0)23 9245 1111Fax +44(0)23 9245 [email protected]

Architectural Solutions

Climate Control

Smoke Control

Service and Maintenance

“People feel better in Colt conditions”

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