Sun. Light. WAREMA.

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Genzyme Headquar ter Cambridge MA, USA

Project reportIntelligent use of

natural daylight

Effective

heat protection despite

internal installation

Comfortable room climate

with WAREMA

LONWorks® control

Energy efficient building is notyet on the agenda in the USA.Thermal comfort and adequa-te lighting are guaranteedthrough air conditioning sys-tems and all-day artifical ligh-ting.

Building owner

But there are exceptions. The Genzyme Corporation, an in-ternational biotechnology com-pany, designed and built theirnew headquarters in Cambridgeas the first green building in theUSA. The 12-story buildingwith an office space of 27,900sqm shows various architectu-ral features for the utilisationof solar energy and naturaldaylight.

Like photovoltaic cells on theroof and heliostats whichflood the atrium with daylight,WAREMA’s light-controlsystems play an importantrole in the energy concept.

Architect

The successful project wasmanaged and planned by theGerman architectsBehnisch, Behnisch + Partnerfrom Stuttgart in cooperationwith architectsHouse and Robertson fromLos Angeles.

Light planning

The daylight and artificial lightsolutions designed by theLight Laboratory Bartenbachin Innsbruck make the buildingappear bright and inviting. The offices are flooded with natu-ral daylight and create a plea-sant atmosphere, thus increa-sing the wellbeing andcontentment of its users.

Project information

3

Specifications:

Glazing- heat protection glas- Ug=1.1 W/m2

- g = 0,56

Light-control system- 808 light-guiding blinds E80 LD

with Hall sensor- 123 light-guiding blinds E80 L

with Hall sensor- Slat quality Miro 3- gtot Facade = 0,25

LONWORKS® control- 600 LON motor control units

for 4 motors- 1 LON weather station- Conventional blind switch in

each room- Service PC with tabular visua-

lisation- Remote maintenance via

modem- Support of heating and air

conditioning- Slat guidance- Annual shade program

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Building details

Building height: 55mFloor space: 27,900 sqmNumber of storys: 12Architects: Behnisch,Behnischand Partner, StuttgartStart of construction: October 2000Completion: October 2003

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Light-control systems

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Light-control systems

The 931 light-control systemsinstalled at Genzyme fulfillfour main functions:

- The luminance of the wind-ows always remains at alevel which is permissible forworkstations - regardless ofthe position of the sun.

- The contact with the outsideworld remains largely intactwithout detrimental effects onthermal and visual comforts.

- All rooms are illuminated with natural daylight for aslong as possible.

- Thanks to the regulation ofsolar energy (g value), theroom temperature alwaysremains at a comfortablelevel.

WAREMA Light-guiding

blind

These slats with a reflectivetop side and a reflectance of93 % form the foundation ofeffective utilisation of daylight.As the light is reflected on theceiling of each room, the day-light is distributed evenly anddazzle-free around the room.

Double-motor blind

Most blinds are dividedinto two sections, which canbe adjusted independently.Whether workstation or mee-ting room, grey November dayor sunny summer’s day - forevery work or illumination situa-tion, the perfect light settingscan be programed.

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Glare protection and con-

tact to the surroundings

Even with the blinds down,the contact to the outsideworld remains intact. This isachieved by special semi-per-forated slats. The non-perfora-ted half of the slat reflects thedirect sunlight.

From the workstation, theperforated side of the slat app-ears transparent and allowsdazzle-free contact to the sur-roundings.

Effective heat protection

despite internal installation

At Genzyme, all blinds are fittedinternally. The architecture andheight of the building did notallow for the use of an exter-nal sun shading system.

The mirror-finish slats reflect alarge part of the solar radiatonwhen closed without con-verting it to thermal radiation.Hence, the building stayscomfortably cool even withextreme outside temperatu-res.

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Control

Each user can adjust theblinds via a push-button switchaccording to their own require-ments in terms of illumina-tion, surroundings and tempe-rature.

Full performance of the light-guiding blinds is only achievedby adjusting the slats to thebest position related to themeasured weather data andthe position of neighbouringbuildings. In connection withthe automatic slat guidancewhich is sensitive to the posi-tion of the sun, the best possi-ble use of daylight, glare pro-tection, transparency and heatprotection can be achieved.

The solution: LONWORKS®

Planner and building ownerdemanded highest functional-ity as part of a standardised,efficient and reliable system.This is why the buildingowner chose LONWORKS®

technology. A particular advan-tage of this technology: Thelocal processing of data ren-der this system extremely effi-cient and reliable.

The control mainly consists ofa weather station, the motorcontrol units (actuators) andthe manual overrides.

The LON sensor unit is thefirst component to which theoutside brightness and tem-perature sensors are connec-ted. The data measured bythese sensors (such as date,time and the current position ofthe sun (elevation and azimuth)are transmitted to all Bus parti-cipants.

The motors are controlled bythe UL- certified 4 motor con-trol unit LON MSE 4M120I.This unit processes all neces-sary data and can control upto four light-guiding blindsindependently. In connectionwith the position feedbackdevice (Hall sensor), the LONMSE 4M120I allows a particu-larly exact position control.

The manual override allow theindependent control of thelight-guiding blinds on a roomby room basis. The light-gui-ding section (top) and glareprotection section (bottom) canbe controlled independently.

Safety First...

In case of a fire alarm, a retrac-tion command is sent to alllight-guiding blinds, whilstemergency services are aler-ted. This ensures that casual-ties and the source of the firecan be easily located fromoutside.

Features of

LON MSE 4M120I

- Local processing of data- Switching point for sun,

clock... - Parametriable scenarios- Parametriable automatic

reverse- Support of heating/ air condi-

tioning requirements- Annual shade diagram- Slat guidance- Extremely exact position

control through use of Hallsensor

- Processing of window con-tacts

- Connection of up to 4 blind buttons

- Visualisation through GLT- UL certification- Robust unit with metal

housing

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Slat guidance

The slats are traced accordingto the position of the sun. Thisensures perfect use of lightguidance and glare protection.The actuator receives themeasured position of the sun.It then computes the perfectslat position based on theparametrised limit values andfacade direction, and controlsthe blinds accordingly. The slatguidance is based on two dif-ferent guiding curves. Theseare activated in dependence tooutside temperature in orderto support the heating or coo-ling process. Heating is sup-ported by transporting moresunlight into the room andcooling is supported by reflec-ting more sunlight.

Annual shading

An important element for theoptimisation of sun shadingand daylight guidance in theGenzyme building is the annu-al shade diagram.

The building and its neighbou-ring buildings are illustrated ina CAD programm and a refe-rence point is defined for eachlight-guiding blind. The specifi-cally developed WAREMAsoftware calculates the sha-ding patterns for each referen-ce point and each day of the

year. The calculated data arestored in the motor control uni-ts and activate each blind ifneeded.

Service PC / Visualisation

The service PC is used forvisualisation, remote mainte-nance, central control andparametriasation.Maintenance and other servi-ce tasks can be conductedfrom Marktheidenfeld inGermany via a modem - evenfor locations as remote asCambridge, USA.

Although the service PC is notessential for the dailyoperation, as the processesare controlled locally by thevarious motorcontrol units ,Genzyme chose this option foroutstanding service.

WAREMA Renkhoff GmbH • Vorderbergstraße 30 • D-97828 Marktheidenfeldwww.warema.com • email: info@warema.de