Embed Size (px)
Citation preview
Part of the VKR Group
Innovative Natural Ventilation Systems
4 Whychoosenaturalventilation
5 WhychooseWINDCATCHER®
6Howdoesitwork
7 Howisitcontrolled
8 CaseStudy-QueenElizabeth
SixthFormCollege
9 CaseStudy-PeckhamAcademy
10 CaseStudy-Addey&Stanhope
11 Acousticmatters
12 CaseStudy-ImperialCollege
13 CaseStudy-SuttonArena
14 CaseStudy-KingsHillOffices
15 CaseStudy-DaimlerChrysler
16 CaseStudy-BlackberryHillHospital
17 WINDCATCHERwithSOLA-BOOST®
18 TheMonodraughtRange
18SUNCATCHER®
19 CaseStudy-ThePriory
NeighbourhoodCentre
20 ABSSUNCATCHER®
20 ABSWINDCATCHER®
21 SOLA-VENT®
22 BREReport
23 R&DCommitment
23 WindowMaster
24 CaseStudy-WHSmith
25 BespokeSystems
26 Installationdetails
27 SpecifyingaWINDCATCHER
Theprincipleofencapsulatinganyprevailingwindsandusingthisnaturalresource
asaformofventilationoriginatedsome2,000yearsagointheMiddleEast,where"windtowers"wereoftenacommonsight,buttheprincipleisstillusedtoday.
TheMonodraught WINDCATCHERis
anextensionofthatprinciplebutisalso
adevelopmentofthehighlysuccessful
MonodraughtVerticalBalanced-FlueSystem
patentedin1965whichhasnowbeen
utilisedbyalmostallleadingcompanies
intheUKtoprovideoptimumventilation
foranyboilerhouseconfiguration.
Clean,freshair,relativelyfreefrom
contaminationortrafficpollution,iscarried
downfromroofleveltothefloorsbelow
throughinternalductsandacontrolleddamper
arrangement.Bymaximisingwindpowerthe
needforairconditioningiseliminated.
2,000 years of success
2MonodraughtIntroduction
AnintroductiontoMonodraughtContents
from. . .
MonodraughtWINDCATCHERsystemshaveprovedtobethemosteffectivemethodofprovidingnaturalventilationtoanycommercialbuilding.
‘‘’’National Green Specification
Sinceitsinception,MonodraughtLtdhasalwayssoughttoinvent,exploreanddevelopinnovativeconcepts.
In1990MonodraughtlaunchedtheWINDCATCHER
naturalventilationsystem,whichwasbasedonthe
originalVerticalBalanced-Fluearrangementand
combinesalltheadvantagesofpassivestackand
winddrivennaturalventilation.
ProfessorTerryPayne,foundedtheCompanyin
1974.Sincethenthecompanyhasspecialisedinthe
developmentofnaturalventilationandlowenergy
systemsandproductsforthebuiltenvironment.
AsignificantfeatureoftheMonodraughtproductrangeis
thehighlevelofArchitecturaldesignempathyachieved
throughdesignflexibility.Thisenablesdesignstobevisually
appealingwhilststillachievinganefficientandpractical
contributiontotheharnessingofournaturalresources.
TheMonodraughtStory
Making the best use of our natural resources
MonodraughtCompanyProfile 3
Indoor Market, Bridgetown, Barbados
Imperial College, London
Monodraught
Puttingournaturalresourcestowork
Why choose natural ventilation ?
4MonodraughtNaturalVentilation
Naturalventilationbringsinasteadysupplyoffreshair
intothebuilding,toppinguptheoxygenlevel,whilstat
thesametimeexpellingstaleairtoatmosphereusing
thenaturalbuoyancyofthermalforces.FanNoiseoften
associatedwithmechanicalsystemsorairconditioningis
virtuallyeliminatedtothebenefitoftheoccupants.
Itishealthier2
Sincenaturalventilationsystemshavegenerallyspeaking
essentiallynomovingparts,thereisnothingtowearout,
breakdown,corrode,orindeedrequirereplacement.
Itrequiresnomaintenance3
Hasalongtermtrackrecord4Itiscosteffective1Thecostofnaturalventilationsystemsisoftenlessthan
thatofamechanicalventilationsystemplusthereareno
runningcostsorenergyconsumption.Intoday’scurrent
climatewithenergycostsescalatingatanunprecedented
rate,thereisnotellingwhatenergycostswillbeinsay,
5or10years’time!Oncenaturalventilationisinstalled,
therearenorunningcostseverforthelifeofthebuilding.
Issustainableenergyinaction5Bymaximisingtheuseofwindpressureandthenatural
stackeffectofthermalbuoyancy,naturalventilation
doesnotuseanyfossilfuelledenergybutrelieson
harnessingwindpowerandthethermalriseofwarm
airtobeusedinacontrolledandsophisticatedway.
OurVictorianforefathersusednaturalventilation
extensively,asindeeddidthePersiansandArabiansbefore
that.Today’snaturalventilationsystemshaveallthebenefit
ofsophisticatedcontrolsbutretainthewellestablished
principalsoftheoriginsofnaturalventilation.
St Annes School, Haute Valley, Jersey
Why choose ?
MonodraughtWINDCATCHER 5
Puttingournaturalresourcestowork
Earlynaturallyventilatedbuildingsreliedpurelyona
passivestackapproachtoactlikea‘chimneystack’.The
limitationofsuchanarrangementisthattoworkeffectively,
thetemperatureinthepassivestackhastobesome10°C
abovetheambienttemperatureintheroom,whichin
summermonthsmayleadtooverheating.WINDCATCHER
systemsovercomethisproblembyincorporatingwind
drivenairintakestogenerateapositivepressureinthe
roombelowandcombinedwithtemperaturedifferential
thisassiststhepassivestackelementtoexhaustthestaleair.
WINDCATCHER®naturalventilationsystemsprovidethe
benefitofnight-timetimecoolingor“freecooling”,which
isconsideredtobeoneofthemostimportantaspectsofthe
WINDCATCHERnaturalventilationstrategy.Duringsummer
months,thevolumecontroldampersareprogrammedto
openfullyatnighttimetoencapsulatethecoolnightair.
Anyprevailingwindcarriesthisnightairdownintothe
buildingbelowpurgingthebuildingofstaleair.The
cleansingeffectofthisdownwashofcoldairleaves
thebuildinginteriorfeelingfreshandcleanforthe
benefitoftheoccupantsarrivinginthemorning.
MonodraughtWINDCATCHERsystemshaveanimpressive
history.Withover7,000WINDCATCHERinstallationsover
thelast15years,Monodraughtsystemshaveconsistentlyand
effectivelynegatedtheneedforairconditioningsystems.70%
ofMonodraughtWINDCATCHERsystemsareinstalledon
Schools,butincreasingly,Hospitals,Offices,andmany
CommunityProjectsarenowbenefitingfromthem.
Proventrackrecord
▲
Morethanjustapassivestack
▲
Monodraughtprovidearangeofhighlysophisticatedcontrol
systems(seePage7andalsoseparatecontrolsbrochure)
toenabletheusertoeasilycontroltheflowoffreshair
dependingoneitherinternaltemperature,CO2,wind
movement,orhumidity.Theoptionofacousticliningto
theinternalWINDCATCHERquadrantsprovidescontrol
overexternalnoisetransmissionintotheroom.
Nighttimecooling
▲
Oxley Park School, Milton Keynes
Precisecontrol
▲
Naturalventilationsystems
6MonodraughtWINDCATCHER
How does work ?DaytimeOperation
IntheSummermonths,perimeterwindowscanbe
utilisedtoaidcrossflowventilation.Withfreshaircoming
inthroughthewindowsonthewindwardsideofthe
building,staleairwillbeexhaustedthroughthepassive
stackelementoftheWINDCATCHERsystem.Warmair
willnaturallyrisetoceilinglevelbutatthesametimeany
prevailingwindontheWINDCATCHERsystemcarries
asupplyoffreshairdownintotheroombelow,thereby
slightlypressurisingthebuildingandincreasingthe
outwardflowofstaleair.
Bythemovementofexternalairatroof
level,anegativeorsuctionzoneis
alsocreatedtoonesideofthe
Monodraughtsystemthatservesto
encouragetheextractionofstaleair
toatmosphere.
NightTimeandMid-SeasonOperation
Duringmid-seasonsandintheeveningsoratweekends,whenthe
buildingisperhapsnotbeingused,theWINDCATCHERsystem
isnotdependentonopenablewindowsorventsinthesideofthe
building,whichallowsthebuildingtofullysecure.
Withallexternalwindowsclosed,theMonodraught
WINDCATCHERwillstillcontinuetooperateprovidingallthe
benefitsofthis"freeairconditioning".Thisisparticularlyimportant
atnighttimetoprovidefreecooling.Volumecontroldampersat
thebaseofthesystematceilinglevelwillpreciselycontrolthe
amountofairflowthroughthesystem.Iftheinternaltemperature
fallsbelow15°Cthedamperswillautomaticallyclosetoprevent
overcooling.
ThemainadvantageoftheMonodraughtWINDCATCHER®naturalventilationsystemoverotherformsofnaturalventilationisthat
itdoesn’tmatterwhichwaythewindblows,thelouvresononesidewillalwaysencapsulatetheprevailingwindandturnthatairmovementdownthrough90°.
Stackeffectisachievedasaresultofthedifferencebetween
theairtemperatureinsideandoutsideofabuilding-andthe
subsequentimbalanceeffectonairdensityandpressuregradient
oftheinternalandexternalairmasses,resultsinthewarmair
risingupthroughthequadrants,dispersingtoatmosphere.
PLAN
air out
air in
AfullyprogrammableAutomaticControlPanelisprovided
asstandardintheMonodraughtpackage.Thesepanels
canbecontrolledbyeithertemperatureorCO2sensors,
dependingupontherequirementsofeachspecific
application.Rainsensorsareincludedasstandard.These
panelscanservemultipleroomsandaresuppliedinfour
standardconfigurationstomeettheprojectrequirements.
Temperature Oneormoretemperaturesensorsarenormallypositionedin
theroomtoachieveanaveragereading.Thisisthesimplest
methodofautomaticcontrolandissuitableformost
applications.Thedampersarenormallyset
tocommenceopeningat16°Cduring
summermonthsandopen20%
forevery1°Criseininternalroom
temperature.Seasonalswitching
enablesthetemperaturesetpoints
tobeincreasedinthewintersetting
topreventheatlossduringthisperiod.
How is it controlled ?
MonodraughtWINDCATCHERControl 7
WINDCATCHERSystemControlOptions
AutomaticControl
TherearethreebasicmethodsofcontrollingtheMonodraughtWINDCATCHERnaturalventilationsystem.
CO2Inthecaseofdenselypopulatedareasofabuilding,suchas
classrooms,conferenceroomsorsocialareas,CO2sensors
arerecommendednormallysetto1500ppm,tobeusedin
conjunctionwiththetemperaturesensors.
Manual Override Eachroomhasamanualoverride,whichformspartof
thetemperaturesensor.Thisconsistsofapushbutton
arrangementwiththreeLEDlightstogivetheenduser
completecontrolovertheirventilationstrategy.Thesystem
automaticallyrevertstoitspre-programmedsettingaftera
20minutedelay,orcanbeconfiguredto1or3hours.
TheWINDCATCHERcanbesuppliedwitha
Semi-AutomaticControllerthatalsoallowstheenduserto
controltheopeningorclosingofthedampers
usingthepushbuttonoverrides.The
automaticcontrolsystemopensthe
damperarrangementwhentheinternal
temperaturerisesabove20°C.Below
20°Cthedamperswillbegintoclose.
However,atanytimetheusercanoverride
thedamperpositionusingthepushbuttons.
Semi-AutomaticControl
Thisisthemostbasicmethodofcontrolwithmanual
dampersoperatedbyaleveratceilingdiffuserlevel.
Ingeneraltermsthismeansthatdampersarenormallyleft
fullyopenduringsummermonthsandonlypartiallyopen
duringwintermonthstoallowtrickleventilation,butstill
allowfullendusercontrol.
ManualControl
TheiNVentsystemisabespokein-housedesignednatural
ventilationmanagementsystemforupto4zonesof
SOLA-BOOST®orWINDCATCHERsystems.Utilising
ourseasonallyadjustedproportionalcontrolbasedon
temperatureandCO2.
Theunobtrusivelookallowsthesystemtobesitedall
aroundbuildingsratherthanjusttheboilerroom.This
meanseachpanelcanbelocaltothezonesitcontrols
minimisingcabling.
iNVent: Intelligent Natural Ventilation control system
Classroomsandotherteachingspacesareoneofthemain
areaswherenaturalventilationisvitalforthewellbeingof
theoccupants.TheGovernmentguidelinesonventilation
foreducationalbuildingshavechanged.TheDfEE
document,BB87,concentratedoninternaltemperatures
astheoverridingfactortodetermineventilationlevels.
However,BB101concentratesmoreonairqualitythan
oninternaltemperatureandprovidesguidelineson
acceptablelevelsofCO2overthecourseoftheSchool
day.Afigureof1,500partspermillion(ppm)asan
averageoverthedayhasbeenadoptedinthedocument,
althoughtheupperlevelis5000ppm.However,BB101
stillreferstoacceptableinternaltemperaturelimitsandall
Monodraughtventilationschemestakethisintoaccount.
Duringthesummerperiod,temperaturelevelswill
betheoverridingfactorbutinthewinter,CO2levels
willdictatetheamountofventilationrequired.The
MonodraughtWINDCATCHER®automaticcontrolpanels
arelinkedtotemperatureandCO2sensors,toensure
therequirementsofbothBB101andBB87aremet.
WINDCATCHERsystemsarealsoidealforproviding
ventilationtoothernon-teachingareas,suchas
DiningHalls,Libraries,andGymnasiumsandare
alsoidealforcorridors,storeroomsandsimilarareas
thatdonothavethebenefitofopenablewindows.
Monodraughtnaturalventilationsystemsarenowalso
beingincreasinglyusedinSportsHallsandthelike.
SchoolsandColleges
Best in class
8MonodraughtWINDCATCHERCaseStudy-QueenElizabethSixthFormCollege
MonodraughtWINDCATCHERnaturalventilationsystemshaveachievedanenviablereputationalthoughtherehavebeensomecompaniesthat
haveattemptedtocopytheMonodraughtWINDCATCHERsystemsandindeed,manyEngineersandDesignershavedesignedtheirownbespokenaturalventilationsystems.
Thefactcannotbeignoredhoweverthatoverthelast10years,
WINDCATCHERsystemshaveprovedtobeconsistentlyeffectiveand
reliableandhaveperformedinaccordancewiththeinitialdesign
criteria.Itistheconstant‘finetuning’andfeedbacktoMonodraught’s
dedicatedDesignTeamswhichenablesthisstateofperfectiontohave
beenachieved.The‘acidtest’oftheeffectivenessofWINDCATCHER
systemshasperhapsbestbeendemonstrated
duringthehotsummerof2006,wheredaytime
temperaturesashighas36°Cwererecorded
andyet,throughoutthisunprecedentedand
extensive‘hotspell’,Schoolsandoffices
whereWINDCATCHERsystemswerefitted,
experiencedahighsatisfactionrate–withno
reportsofanyfailuresoroverheating.No-one
knowswhatfuturesummersholdinstorebutif
2006wasanythingtogoby,Monodraughtare
confidentthattheirWINDCATCHERnatural
ventilationsystemswillcontinuetoprovidea
completelyreliableanddependablemethod
ofprovidingenergyfreenaturalventilation.
Queen Elizabeth Sixth Form College, Darlington, Co DurhamArchitect:Brown Smith Barker, Darlington
Theareaonceformedanopencourtyard,whichwasroofedovertoprovideaLibraryandITRoom.6Nº.GRP1000WINDCATCHERsystemswereinstalledtoprovidenaturalventilation–andtheCollegelandscapegardenersweregivenafreehandtoprovideanattractivegarden-likesettingforthenewWINDCATCHERsystems.TheArchitectsremarkedthateversincethenewbuildingwasoccupiedtherehadbeennothingbutpraiseforthenaturalventilationprovidedbyWINDCATCHERsystemsascomparedtotheadjoining,airconditioned,ITRoom.Afarmorepleasantworkingenvironmentisimmediatelynoticeabletoeveryoneusingtheschool.
CaseStudy
Whereitisnecessarytoprovidenaturalventilationon
multi-floorinstallations,MonodraughtWINDCATCHERsystemshaveprovidedaneffectivesolution.
Eachroomshouldbeservedbyaseparateducttoavoidproblemsofcrosstalk
andacousticliningcanbeprovided,whererequired,toeliminatetheingressof
externaltrafficnoise.Motoriseddampersandeggcrateceilinggrillescaneither
belocatedatceilingleveltoeachductortheductcanbeturnedthrough90°
atceilinglevel.Thisisnowatypical
arrangementforschoolswhereby
multiplefloorsarecommonplace.
Rectangularshapedsystemsare
generallyprovidedtolowerfloors
asthesereducetheimpactonfloor
spaceastheductpassesthroughan
intermediatefloor.
WINDCATCHERsystemsincreasethe
utilisationofthethermalmassofthe
buildingbymaximisingtheadvantage
ofnighttimecooling.Formulti-floor
applications,itisarelativelysimple
mattertoprovidebuilderswork
ductworktolowerfloors.
Multi-floor operation
MonodraughtWINDCATCHERCaseStudy-PeckhamAcademy 9
SchoolsandColleges
Roofscape of Peckham Academy
Deflector plate
Classroom Corridor
ExhaustAir
PrevailingWind
Section drawing of one of the WINDCATCHER systems installed at the Peckham Academy
CaseStudy
Peckham Academy, LondonArchitect:Curl La TourelleConsultingEngineers:Halcrow, Burderop Park, Swindon
The£23mAcademyincentralLondonconsistsof3-storeybuildings,whereitwasnecessarytoprovidenaturalventilationnotonlytothetopfloorbutalsotothetwofloorsbelow.MonodraughtWINDCATCHERsystemswereusedtoprovideasustainablesolutiontoachieveventilationtodeepplanClassroomsonmultiplefloors.ThetopfloorClassroomsareservedby800mmunits,positionedinthecentreofeachroom,whereasgroundandfirstfloorsareservedbyrectangularunitsmeasuring1300mmx450mm,connecteduptointernalblockworkventilationshaftsformedinthewallsofthecentralcorridors.
ThedemandsonDesignersforsuchProjectsisconsiderable.Schoolsininnercitiessufferfromevenhigheradverseexternalambient
conditionsthantherestofthecountrybutthedemandforenergyfreesolutionsisevengreater.
Acounterargumentputforwardagainsttheuseofnatural
ventilationforinnercitySchoolsisthequestionofair
pollutionrelatedtoairquality.Monodraught’sanswertothat
isthatchildrenstillhavetotraveltoSchool,theyoftenwalkto
School,andtheystillprobablygoouttoplaybetweenClasses!
Thealternativecostoffiltrationandcoolingbymechanical
meansforsuchSchoolswouldbeimmense.
MonodraughtWINDCATCHER®naturalventilationsystems
arenotnecessarily
theperfectcurebut
itisconsideredthat
drawingairfromabove
rooflevel,whichis
wellabovethetraffic
pollutionthatpervades
atpedestrianlevel,
mustsurelybea
farbetteroption.
AtAddey&StanhopeSchool,situatedonthebusyA2
trunkroadinDeptford,GuyShackle,Associateforthe
Architects,explained,“Anydesignsolutioncouldnot
relyonopeningthewindowstoprovidefreshairforthe
occupants.Iwasimpressedwiththesimplicityofthe
WINDCATCHERtechnology.Thesystemsprovedthemost
appropriatetechnicalsolutionandalsometourpragmatic
agendaonotherissues.Theyarecosteffectiveandprovide
alowenergypassivesystemwithgoodgreencredentials.”
Fresh air for inner city schools
10MonodraughtWINDCATCHERCaseStudy-Addey&Stanhope
SchoolsandColleges
Two views of the external elevations of Addey & Stanhope School in Deptford
CaseStudy
Addey and Stanhope School, Deptford Architect:Barron and Smith Architects
TheSchoolwascompletedin2004andtheacousticdesignbyBickerdikeAllenPartners,determinedthattheexternaltrafficnoisewas70dBbutpost-occupancytestsshowedthatallClassroomsachievedaperformancecriteriaofbetween38dBand40dB.
BrunelUniversityarecurrentlycarryingoutacoustic,occupancy,andairqualitymonitoringaspartofa4-yearStudy.
11
AcousticissuesareincreasinglyimportantwiththestringentrequirementsofBB93andthedilemmafacedbymany
Designersoftheneedtohaveopenablewindows,whichthemselvesarepronetonoiseingress.
Itisconsideredthatbydrawingairfromaboverooflevel,
thatinitselfavoidstheproblemsoftrafficnoiseascompared
tolowlevelwindowsbuttheMonodraughtdesign,with
therelativelylargeinternalductsinacruciformdesign,
lendsitselfideallytotheapplicationofacousticmaterial.
Acoustics
Acoustic mattersInJanuary2005,Monodraught
commissionedtheBuildingResearch
Establishment(BRE)tocarryouta
seriesofairborneacoustictestson
thefullrangeofWINDCATCHERnaturalventilationsystems,
togetherwithvariousinsulationthicknesses.
TheBREestablishedthatinitsstandardformat,thestyleof
theWINDCATCHERsystemhastheeffectofreducingnoise
transmissionby15dBascomparedtoanopenwindow.
However,byincorporating25mmofacousticliningtothe
airpaths,afurther11dBwasachieved.Thechartshowsthat
onlargersystems,agreater
thicknessofinsulationfoamhas
theeffectofgreaterattenuation.
Acousticpodsorotherforms
ofattenuationcanalso
besuspendedbelowthe
Monodraught
terminalsto
achieveaneven
greaterimpacton
soundinsulation.*Key: VCD = Volume Control Dampers Foam is as follows: 25mm open cell polyurethane foam (28kg/m3) lining the trunk, capping and internal airways OR 50mm open cell polyurethane foam (28kg/m3) lining the trunk, capping and internal airways
Test Number
12
13
14
15
16
17
18
19
Construction Details
GRP 800 Square system - VCD Open
GRP 800 Square system - VCD Closed
GRP 800 Square system 25mm insulation foam - VCD Open
GRP 800 Square system 25mm insulation foam - VCD Closed
GRP 1000 Square system 25mm insulation foam - VCD Open
GRP 1000 Square system 25mm insulation foam - VCD Closed
GRP 1000 Square system 50mm insulation foam - VCD Open
GRP 1000 Square system 50mm insulation foam - VCD Closed
(C;Ctr) (dB)
15 (0;-1)
30 (-1;-2)
26 (-1,3)
47 (-1;-5)
24 (-1;-4)
39 (-1;-5)
31(-1;-5)
47 (-2;-7)
D n,e,w
System800100012001500
13751585
Dimension A800 x 800
1000 x 10001200 x 12001500 x 1500
Dimension CDimension B11001240
6007408801090
Plan view
MonodraughtAcoustics
System800100012001500
12001500
Dimension A8001000
System1200 1200
Dimension A
Section
Full copies of the BRE Acoustic Reports are available on request
12MonodraughtWINDCATCHERCaseStudy-ImperialCollege
WhenPhilEvans,ImperialCollegeLondon’snewFacilitiesManager,visitedMonodraught’s
officesinHighWycombetodiscusstheirrequirements,hewasabletowitnesstheWINDCATCHERinstallationsinaworkingofficeenvironmentandhewasconfidenthewasmakingtherightdecision.
FollowingthecompletionoftheworkinSeptember2004,
"Theeffectandresultwasinstantaneous",saidPhilEvans.
"Thehotstuffyatmosphere,
whichalwayspervaded
theLibrary,disappeared
overnightandwewere
immediatelyconsciousof
thefreshaircominginfrom
theWINDCATCHERsystem".
Althoughthesystemwas
installedatthetailendof
thesummerseason,the
staffandstudentscouldsee
thatthiswascertainlygoing
toprovidetheanswerfor
forthcomingterms.
Colleges excel
SchoolsandColleges
Imperial College, London Consultant:Gatehouse Architectural Consultants
Throughoutthesummerof2004,PhilEvans,thenewlyappointedFacilitiesManageratImperialCollege,London,wasfacedwiththeproblemofhowtoovercometheproblemsofsevereoverheatingthathadplaguedtheCollege'sLibraryfortheprevious10years,mostparticularlyinthesummermonths.Thesituationwasexacerbatedbythefactthatthewholeofthetopfloorofthebuildinghadfullheightglasscurtainwallingandtheexistingmechanicalventilationsystemseemedunabletocope.
SixGRP1000squareWINDCATCHER®naturalventilationsystemswereinstalledintheautumnof2004toovercometheproblemandcurrently,furtherWINDCATCHERsystemsarebeingconsideredforotherareas.
CaseStudy
View of the WINDCATCHER systems from outside
Further WINDCATCHER applications at Imperial College are now under consideration
Themostfrequently
askedquestion
aboutnatural
ventilationis
'whathappens
inthewinter
months?'Mighttheprevailingcolddraughtspresent
aproblem?ImperialCollegehasnowbeenusingthe
systemformorethantwoyearsandduringthewinter,the
ventilationopeningshavebeenprogrammedtoremainopen
just5%togivebackgroundtrickleventilationandthere
havebeennoincidentsreportedofanycolddraughts.
InchoosingtheMonodraughtWINDCATCHERsystems,PhilEvans
concluded,"Weareallawarequitehowdifficultitistostudyand
workinastuffyenvironmentandthiswasoneofthekeyfactors
intheCollege'sdecision
toimprovetheventilation
intheLibrarybyadding
thesesixMonodraught
WINDCATCHERsystems.”
Weatherprooflouvres
Motorised volumecontrol dampers
Ceiling diffuser
Freshair in
Staleair out
Internaldivider
Anti birdmesh
College Library, showing WINDCATCHER ceiling grilles
MonodraughtWINDCATCHERCaseStudy-SuttonArena,Sutton 13
thisimpressivesportsfacilitywhichprovidesoutstanding
indoortrainingfacilitiesforInternationallevelfieldandtrack
athletesaswellasregionalclubsandcommunitygroups.
Ten750mmdiameterSUNPIPEsystemswerealsousedto
providethenaturaldaylightrequirementwiththeadded
benefitthattheydonotcontributetotheprojectsheatgains.
WilliamHogan-O'Neil,thearchitectresponsiblefortheLondonBoroughofSutton’s
£4.8millionSuttonArenaleisurecentreproject,hadastrongvisioninmind.
"Mywholeideafromtheconceptstage”saidWilliam,
“wastobringtheoutsideindoors,withdaylightingand
freshairtoreplicateasmuchaspossible
traditionaloutsidefieldandtrackfacilities
inthisall-weatherArena.Monodraught
SUNPIPE®naturaldaylightsystemsand
WINDCATCHER®naturalventilationsystems
weretheidealsolution.Ihadnotspecified
WINDCATCHERsystemsonaprojectofthis
naturebeforebutIamsureIwillinfuture."
Atotalofeight1000mmdiameter
MonodraughtWINDCATCHERnatural
ventilationsystemswereused,eachfitted
withmotorisedopposedbladedampersfor
Bringing the outside inside
Above left: External view of the Sutton Arena
Right: Indoor running track at Sutton Arena
SchoolsandCollegesCaseStudy
Sutton Arena, Sutton, SurreySpecifier:William Hogan-O'Neil, Chartered ArchitectClient:London Borough of Sutton
SuttonArenaisjustoneofagrowingnumberofStadiasupportedbySportEngland,wherenaturalventilationsystemsareusedinordertoreduceenergycostsbutalsotoembraceeco-friendlystrategiesasalongtermgoal.SuttonArenaisoftenusedfortelevisedindoorathletics,hencethehugearrayofpowerfulfloodlights,whichinthemselvesproduceparticularproblemsofhighheatgains.NomechanicalventilationorairconditioningisusedandtheWINDCATCHERsystemsprovidetheperfectenvironment,providingaconstantsupplyoffreshairtothisprestigiousLondonSportsFacility.
Anti birdmesh
Weatherprooflouvres
Motorised volumecontrol dampers Ceiling diffuser
Freshair in
Staleair out
Internaldivider
Diagram showing WINDCATCHER operation
14MonodraughtWINDCATCHERCaseStudy-KingsHillOffices
Civil service
Offices
View of the WINDCATCHER systems installed at the Kings Hill Council Offices
Left: Brunel University findings on internal temperatures
Openplanofficeswithoutairconditioningareoftenpronetooverheatingand
sufferfrompoorairquality,duetothelimitedeffectofopeningwindows.
WINDCATCHER®naturalventilationsystems
provideventilationtoallareas,asthe
ventilationisprovidedatceilinglevelandis,
therefore,ideallysuitedtodeepplanoffices.
AtKingsHilloffices,BrunelUniversitycarried
outtwoindepthmonitoringstudiesduring
thesummermonthsof2001and2002.Full
copiesoftheReportsareavailableon
requestbutthegraphshowsthatnight
timeexternaltemperaturestypically
wentdownto15°Cbutwhendaytime
externaltemperaturestopped30°C,
theinternaltemperatureswerecapped
ataround28°C.Thisdemonstrates
theeffectivenessoffreenightcooling
sincethisreducesthetemperatureof
thefabricandstructureofthebuilding,
preventingdaytimeoverheating.10
15
20
25
30
35
37463 37464 37465 37466 37467 37468 37469 37470
Date
Tem
per
atur
e (D
eg.C
)
Ext Temp
1st Floor Temp
Ground Floor Temp
Weekend
Ground floor and first floor temperature profiles in relation to external air temperaturefrom 26/07/02 to 02/08/02 at the Tonbridge and Malling council offices, Kings Hill
(External temperatures provided by the Met office)
CaseStudy
Kings Hill offices for Tonbridge and Malling District CouncilConsultant:Bailey & AssociatesContractor:Try Accord
Atotalof15N°WINDCATCHERsystemsarranged
inavarietyofsizeswereinstalledatthesenewly
builtCouncilOfficesintheyear2000,whichwere
designedtobeasgreenaspossiblewithouttheuse
ofanymechanicalventilationorairconditioning.
TheWINDCATCHERsystemsprovidenatural
ventilationtobothfirstfloorandgroundfloor
officesthroughaseriesofcentralductsandservea
Councilstaffofmorethan250.
SBS(SickBuildingSyndrome)hasbeenahottopicofdiscussionformanyyearswithmanypeoplepointingthefingeratairconditioned
offices,withthepossiblelackofmaintenancetoairfilters,asbeingoneofthemajorproblems.Somepeoplehavecomplainedofsorenessoftheeyes,drynessofthethroatandotherformsofdiscomfort.
Itcannotbedeniedthataconstantsupplyoffreshairis
notonlybeneficialtothestaffbutcanhaveasignificant
impactonreducingenergyconsumption.Acombinationof
Monodraught’sSUNPIPE®andWINDCATCHERSYSTEMSare
oftenchosenforofficeProjectsandindeed,Monodraught’s
7,000sq.ftofficesatHighWycombeareentirelylitby
SUNPIPEsystemsandventilatedbyWINDCATCHER
systemswithoutanyneedforairconditioning.
Eliminating air conditioning
MonodraughtWINDCATCHERCaseStudy-DaimlerChrysler 15
Offices
Above: Internal view of WINDCATCHER and SUNPIPE systems installed at the Daimler Chrysler offices in Milton Keynes
CaseStudy
Daimler Chrysler Offices, Milton Keynes Client:Daimler Chrysler
11N°MonodraughtGRP1000square
WINDCATCHERsystemswereinstalled
intotwoexistingopenplanofficesin
centralMiltonKeynes.Inaddition,58N°
450mmdiameterSUNPIPEsystemswere
installedtoprovidenaturaldaylighting.
TheWINDCATCHERsystemsreplacedtheneed
fortheexistingairconditioningsystemand
byutilisingSUNPIPEsystems,theelectrical
lightingloadhasalsobeenreduced,thus
reducingtheheatgainintotheoffices.
Afarhealthierandmoreeco-friendly
officeenvironmenthasbeenachieved.
Roofscape of the Daimler Chrysler offices in Milton Keynes
16MonodraughtWINDCATCHERCaseStudy-BlackberryHillHospital
Healthy solutions
Hospitals
Below and right: The section of the Blackberry Hill Hospital floor plan featuring the ‘Banana Building’, showing WINDCATCHER installation areas
Blackberry Hill Hospital BristolSpecifier:Hurley Palmer FlattArchitect:Devereux Architects
The8,000sq.mPFIProjectcomprisessome
80N°individualsinglepersonWardsandforms
partoftheFromesidemediumsecureMental
HealthUnitinBristol.Amajorcommitmentwas
requiredforsustainabilityanda20%energy
savingovertraditionalandexistingdesigns
wastobeprovided.Thiswasmetinpartbythe
applicationofthefullrangeofMonodraught
systems,whichincludedWINDCATCHER®,
SUNCATCHER®,Vertical-Balancedfluesystems,
SUNPIPE®,ABSsystems
AtBlackberryHillHospital,alabyrinthofinternalcorridors,as
shownontheplan,andanumberoflandlockedancillaryareas
hadnodirectaccesstonaturallightorventilationtocomplywith
currentGovernmentguidelinesandthisistypicalofthedesign
problemsfacedbysomanyArchitects.Theproblemsweresolved
bytheapplicationofWINDCATCHERsystems.
AswithallsuchHospitalProjects,thefeedbackfromstaffhas
beenverypositivewithbothstaffandpatientsstatingthatthey
considertheyarebenefitingfromthefreshairventilationprovided
bytheWINDCATCHERsystemsandenjoytheabundanceof
naturallightfromtheSUNPIPEsystems.HospitalManagerswhilst
acknowledgingthesavinginenergy,saythattheyalsoappreciate
andenjoytheday-to-daybenefitstheyareachievingforthemselves
andtheirstaffinthegreatlyimprovedworkingconditions.
NaturaldaylightfromtheSUNPIPEsystemsisacknowledgedto
provideasoothing,calmingeffectonpatientsandstaff,andthe
combinationoffreshairandsunlightrelievesthesymptomsofSAD.
FromesidemediumsecureMentalHealthUnitandBlackberryHillHospitalinBristolaretypicalofthenew
vanguardofHospitalsbeingdesignedandconstructedtoachievethenewenergysavingguidelineslaiddownbytheGovernment.
Securityisalwaysamajorareaof
concernwithanyHospital
Projectandgreat
relianceisplacedon
theMonodraught
WINDCATCHERS'
abilitytoprovide
afullyearround
ventilationstrategy
withoutinanyway
compromisingthe
securityofthebuilding.
Thisisachievedsince
theonlyventilationopenings
arethroughthelouvredintakesofthe
Monodraughtsystemsatrooflevel,whichin
themselvesofferahighlevelofsecuritybut
additionalsecuritybarscanalsoeasilybe
incorporatedintotheMonodraughtdesign.
CaseStudy
NormaloperationofWINDCATCHERbeingwindandbuoyancydriven
Thepotentialproblemsofglobalwarmingandasharpriseinenergycostsemphasised
theimportancetoMonodraughttointroduceasolardrivensystemwithaninternalfantobringinadditionalfreshairatanapproximaterateof200l/s,andallthiswithoutanyenergycost!
TheSOOST-BOOST®solarassistednatural
ventilationsystemisanextensionoftheproven
WINDCATCHERdesignandprovidesadditional
solarpoweredventilationonhotsunnydays
whilemaintainingzerorunningcosts.
Thekeytothesuccessofthissystemistheunique
newlypatentedPowerTrack™controlmethod.
Thebrighterthesun,thegreatertheinputor
extractratebuttheuniqueswitchingalsoresults
intwoandahalftimesmorepowerfromthe
solarpanelthancanotherwisebeachieved.
TheWINDCATCHERSOLA-BOOSTsystemsare
suppliedwithpolycrystallinephotovoltaicpanels
whichareembedintotheGRPcappingandthe
completeunitissuppliedinanyBSorRALcolour.
SOLA-BOOSTsolarassistednaturalventilationsystem
The best just got better!
Normal Conditions
Undernormalconditions,theWINDCATCHERtechnology
providesnaturalventilationwithoutanymovingpartsby
encapsulatingtheprevailingwindnomatterhowlight
andturningthatwindmovementdownthrough90°.
Usingthecompartmentalisedverticalvents,freshairis
broughtintotheroomandstaleairisexpelledusingthe
naturalenergyofbuoyancyandstackeffectcommontoall
WINDCATCHERsystems.
Sunny Conditions
Thehighefficiencypolycrystallinesolarpanelshouldbe
orientatedtobefacingsouthandthesolarpanelactivates
thefanoncetheDCelectricitygeneratedexceeds6V.
Oncethepowerproducedbythepanelreaches14V,the
PowerTrack,intelligentpowerconditioningsystem,boosts
thepowertransmittedto25V,whichresultsina250%
increaseinthespeedofthefan.
Atnighttimeorwhenthereisnosun,thefan
isnotactivated.Thecontrolpanelhasahalf
poweroroffswitchtoprovidefullcontrol.
Weatherconditions...
Winnerofthe2006InterbuildShow
AwardforBestBuildingServicesProduct
Motorised volumecontrol dampers
Freshair in
Staleair out
FAN
Solar Power
A 40W polycrystalline solar panel powers the fan.
Fullpowerundersunnyconditionsx2½whenabove14Voutput
Control panel
MonodraughtWINDCATCHERwithSOLA-BOOST 17
Thesystemisalsoavailableasan
extractversion.TheSola-extracthas
thefanoperatinginreverseandis
usedinareaswherecrossventilation
istheintendedventilationstrategy.
NaturalventilationandnaturallightinasingleinstallationTheMonodraughtSUNCATCHER®naturaldaylightand
ventilationsystemcombinestheprinciplesoftheWINDCATCHERsystemwithMonodraught’snaturaldaylightsystem,theSUNPIPE.
TheSUNPIPEsystemmaximisestheconceptofrenewable
energybyreflectingandintensifyingsunlightandeven
normaldaylight,downthroughahighlyreflective,silverised,
mirror-finishaluminiumtubewitha10yearguaranteeagainst
discolouration.Thespecularaluminiumsurfaceiscoated
withPVD(PhysicalVapourDeposition)andthepresenceof
aUVinhibitorprovidesoutstandingUVdurabilitywithno
decreaseintotalreflectance.Thespecialsurfacetreatment
providesexcellentcolourrenditionofnaturallight.
AclearpolycarbonatepatentedDiamondtopdomeseals
thelightpipeagainsttheingressofdust,rainandaprismatic
polycarbonateceilingfittingevenlydiffuseslightintotheroom
orspacebelow.TheSUNPIPEsystemishighlyeffectiveinboth
sunnyandovercastconditionsandevenwhenitisraining.
SUNCATCHER natural daylight and ventilation systems
18MonodraughtSUNCATCHER
Diagram showing operation of the SUNCATCHER system
...it’s only naturalUV protectedpolycarbonatetop dome
Motorisedvolume control dampers
Super Silveraluminiummirror finishSUNPIPE
Extract AirPrevailingwind
Rain traplouvre
Anti birdmesh
Egg-crate grillCeiling diffuser
Ventilation ofStale Air Cool incoming
fresh air
SUNPIPE
TheMonodraughtRange
Extract Air
Fresh Airsupply
Plan of dampers
ThereareagrowingnumberofotherproductsfromtheMonodraughtstabletoprovideawiderangeofeco-friendlyproducts.
SUNCATCHER isthecombinationoftheWINDCATCHER®
andSUNPIPE®systeminasimple,compositeunitnormally
usedonlargercommercialProjects.
ABS WINDCATCHER and ABS SUNCATCHERarelowcost
systemsforsmallercommercialanddomesticProjects.
SOLA-VENTprovidesacombinedunitwithsolardriven
extractandvarioussizedSUNPIPEsystems,normallyusedfor
bathroomortoiletinstallations.
SOLA-BOOST and Sola-extract areoneofMonodraught's
latestdevelopmentsusingsolarpowertechnologyforenergy
freeoperation.
GRP Terminalshavethesameappearanceofthestandard
WINDCATCHERsystembuthaveadifferent
internalconfigurationtoallowfordedicatedintake
orexhaustrequirements.
Bespoke systems-Thereisvirtuallynolimit
tothedesignorfabricationofanaturalventilation
system,allmanufacturedinmaintenancefreeGRPto
ahighstandardoffinishandperformance.
Aseriesofmodulatingdamperswithacombinedceiling
diffuseratceilinglevelcontrolstheflowrateoffreshairinto
thebuildingortheextractofstaleairandeliminatesany
excessiveheatlossduringwintermonths.
MonodraughtSUNCATCHER
Night-TimeCoolingAswiththeWINDCATCHER,theSUNCATCHER
damperscanbeprogrammedtofullyopenat
nighttimeduringsummermonthstoallow
theprevailingwindmovementtoforcefresh
airdownintotheroombelow.Thisnotonly
providesacleansingeffect,purgingand
removingstaleodoursfromtheroom,but
achievesallthiswithoutcompromisingthe
securityofthebuildingorusingany
energywhatsoever.
BespokeSystemsMonodraughtSUNCATCHER
systemsaremanufactured
asstandardfrom400mm–
1500mmsizesinbothcircular
andsquareformats.However,
bespokeshapesandspecial
SUNCATCHERsystemscanbe
designedtomeettheClient’s
requirements.EachSUNCATCHER
iscarefullysizedtomeetboth
theventilationanddaylight
requirementsoftheroomor
spacethatitserves.
SUNCATCHER installations at the BMW head offices
TheAdvantagesCaseStudy
The Priory Neighbourhood CentreClient:Hastings Borough Council
ThiswasamajorrefurbishmentprojectfundedbyEnglishPartnershipin2004,wherebytheexistingbuildingwastransformedintoastateoftheartcommunitycentre.Therefurbishmentwasundertakenwithaviewtousingsustainableenergyprincipleswhereverpossibleincludingasedumroofanduseofphotovoltaicpanels.Theconsultants,PJR,contactedMonodraughttodesignasystemthatwasinkeepingtothephilosophyofthebuilding.TwoGRP1200SUNCATCHERsystemswithintegral750mmdiameterSUNPIPEsystemswereinstalledtoprovidenaturaldaylightandventilationtothecafeandITareas.Thesesystemswereidealastheymetwiththedesignphilosophyinoneneatpackage.
Blackberry Hill Hospital, Bristol
St Paul's School, Burgess Hill
Clifton Road Youth Centre, Birmingham
Priory Neighbourhood Centre, Hastings
BMW, Oxford
19
WhereastheMonodraughtGRPWINDCATCHER®andGRPSUNCATCHER®are
aimedatlargerscaleapplicationsforcommerceandindustry,itisrecognisedthatthereisanincreasingdemandforsmallerlowcostinstallationsinHomes,Shops,Offices,Doctors’Surgeries,etc.
ABSsystemsareidealtoprovidenaturallightand
ventilationtobathrooms,kitchens,toiletsetc,
thislowcostABSsystemissimilarinoperationto
theWINDCATCHERandSUNCATCHER.
ABSSUNCATCHERandABSWINDCATCHER
ABS versatility for smaller installations
20MonodraughtABSSUNCATCHERandABSWINDCATCHER
•Designedtoprovidenaturallightandventilationtobathrooms,kitchens,toiletsandsimilarsmallareas
• Idealforanyroofprofiletheventilationiscarriedthroughflexibleducting
•Availableinthreesizes-ABS350witha230(9")SUNPIPEandABS550witheithera300mm(12")or450mm(18")SUNPIPE
•Expelsstaleairbythepassivestackventilationprinciplewiththeaddedadvantageofbringinginasupplyoffreshaironthewindwardsideofthesystem
•Ventilationcanbecontrolledwiththefullyadjustableceilingventilator
•ComplieswithBuildingRegulationsforPSVventilation
FeaturesofABSSUNCATCHERnaturaldaylightandventilationsystems
AvailableinthreesizesABS 350 SUNCATCHER c/w230mm(9")SUNPIPEtolightanareaupto7.5m2
Ventilationrateatexternalwindspeedof4m/s:16l/sor0.016m3/s
ABS 550 SUNCATCHERc/w300mm(12")SUNPIPEtolightanareaupto14m2
Ventilationrateatexternalwindspeedof4m/s:62l/sor0.062m3/s
Note:TheABS550systemcanalsobesuppliedwitha450mm(18")diameterSUNPIPEtolightanareaupto22m2
SimilarinoperationtothelargerGRPWINDCATCHER,the
ABSWINDCATCHERSofferalowcostoptionwhereventilationisrequiredonasmallerscale.The
ABSWINDCATCHERisavailableintwosizes,anABS550and
ABS350system.TheABSWINDCATCHERisalsoavailable
inaSOLA-BOOST®version.
ABS WINDCATCHERnatural ventilation
systems
ABSSUNCATCHERandABSWINDCATCHER
TheSOLA-VENT®systemisafullyintegratedbathroomlightandventilationsystem,
incorporatingaMonodraughtSUNPIPEnaturaldaylightsystem,twodownlightersandasolarpoweredextractorfan,allinoneunit.
TheSOLA-VENTsystemisavailableintwo
stylishdesignsandistheidealsolutionfor
showerandbathrooms,toiletsandotherareas
wherenaturalventilationisnotavailable.
Thesystemisdrivenbyaphotovoltaicpanel
utilisingpolycrystallinesilicontechnology
whichgivesahighperformancetosizeratio
andprovidespowerevenunderovercastskies.
Alittleknownfactaboutsolarpanelsisthat
theyactuallyworkmoreefficientlyatlower
temperatures,meaningtheymakethemost
oftheavailableenergyinwinterconditions.
Thebuiltinbatterywillprovide7daysback
upoperation,afterwhichtheMainsBackup
facilitywillprovidepowertothefan.
Thesolarpanelishousedinarobust
aluminium/ABSframe.Thepre-wiredunitsare
designedforeasymountingtoavarietyofroof
types,andrequireonlysimpleconnectionto
thecontrolunit.Nomaintenanceisrequired!
AseparatetimercontrolisconnectedtoaPIR
unittoprovidefullyautomaticoperationof
theextractfan.Thetimerprovidesan
overrunof20minutesasrequired
bybuildingregulationsbutis
adjustable.
TheSOLA-VENTsystemusesvery
littlepowerfromeitherthesolarpanel
orthebatteryandthefanrunsonasealedball
bearingassemblyensuringultralow
noiseoperation.
SOLA-VENTnaturaldaylightandsolarpoweredextractventilationsystem
Availableintwosizeswith230mmor300mmdia
SUNPIPEsystemandtwodesigns
Solar powered ventilation and natural daylight
MonodraughtSOLA-VENT
TheSirroco
TheMistral
21
Winnerofthe2006InterbuildShow
AwardforBestInteriorProductoftheShow
Thedetailedmonitoringandmeasurementswere
carriedoutoverfourdaysinAugust1998.Theexternal
temperatureswereapproximately29°C,fortwoofthe
days.Ontheothertwodaysrangedfrom18°Cto22°C.
Theventilationratesofthelecturetheatreswiththe
WINDCATCHERsystemsclosedandsealedwas
determinedtofindabasecomparison.Readingswere
alsotakenwiththedampersclosedandfullyopenand
weremeasuredonthreedaysinG105andfourdaysin
G111.Theeffectofnightcoolingfromtheunitswasalso
determinedovertwodays.Flowvisualisationstudieswere
undertakenontheunitsusingsmokeasatracer.
Arecordingofthesetestsweremadeonvideotape.
Itwasdeterminedthatthebackgroundventilation
ofbothlecturetheatres(i.e.WINDCATCHER
systemssealed)wasrelativelylow.Withthe
WINDCATCHERsystemsfullyopentheventilation
rateinG105rangedfrom1.24ac/hrat1.7m/s
windspeedto5.2ac/hrat4.5m/s.ForG111it
rangedfrom2.13ac/hrat2.6m/sto4.68ac/hrat
4.1m/s.
Ventilationmeasurementswerecarriedoutinboth
lecturetheatresusingthetracergasdecaymethod,
SulphurHexafloride(SF6).
Threepairsofsmallmixingfansmountedinopposingdirections
instandswereplacedfarapartinbothlecturetheatres.The
purposeofthefanswastomixtheincomingfreshairwiththe
tracergasinsidethelecturetheatre.
TheBRETestsdeterminedthattherewasnoshortcircuiting
ofairflowsandtheairchangeratesweremeasuredwiththe
monitoringunitsbeingplacedinthefurthermostcornersofthe
LectureTheatreineachcaseandrecordedairchangeratesof
upto5.2ac/hrdespiteexternaltemperaturesofupto29°C.
BuildingResearchEstablishmentReport
Putting WINDCATCHER systems to the test
Left: Flow visualisation of moderate wind speed with no evidence of any "short circuiting" of the air movement
Below: WINDCATCHER systems installed on flat roof of old central mainframe computer building
A4-dayonsiteinvestigationinAugust1998bytheBuildingResearchEstablishmentprovedtheeffectivenessoftheMonodraughtWINDCATCHER®naturalventilationsystemundersummerloadconditions.
TheUniversityofHertfordshire
wasthetestsiteandusedtwo
LectureTheatresthathadbeenconvertedfromwhatwas
originallyitsoldmainframecomputerroom.Therewere
noopenablewindowsineitherLectureTheatre.G105
wasthesmallerofthetwowithavolumeof458m3.
G111hadavolumeof769m3.
Below: The effect of leaving the dampers to the WINDCATCHER systems open in one of the lecture theatres overnight demonstrated the night cooling effect of the units. A temperature difference of approximately 8°C was achieved in the lecture theatre overnight.
Monodraught WINDCATCHERUniverity of hertfordshire
Night cooling, Day 1
22MonodraughtWINDCATCHERBREReport
Intelligentwindowcontrol:InpartnershipwithMonodraught
Toextendthesuccessofnaturalventilationtechnologies,
MonodraughthasteamedupwithWindowMastertoadd
yetafurtherdimensiontocontrollableventilation,making
themaximumuseofprogrammablewindowopeners.
WindowMaster’smanyInternationalPatentsmakesitthe
leadingSupplierofproductsolutionsforintelligentfaçades
andthecompanyhasovertheyearsdevelopedanextensive
knowledgeoffaçadetechnologyandwindowoperators.
Acomfortableindoorclimatecanbeenhancedbyprecise
controlofmotorisedwindowopeningsinconjunction
withdampercontrolsoftheMonodraughtWINDCATCHER
systems.TomanyDesigners,thisconstitutesthe‘BestofBoth
Worlds’byhavingafullycontrollableventilationstrategyfor
virtuallyanyProject.
MonodraughtResearch&Development
Our commitment to R&D
MonodraughtsupportsanumberofResearchProgrammesbeingcarriedouttoensurethattheirproducts
maintainacontinualdevelopmentcyclethatcanbemonitoredandindependentlyassessedbytheUniversities.Furthermore,MonodraughtconsidersithasacommitmenttosupportingandencouragingnewEngineerstotheindustrytoengrossthemselvesinthesenewsustainabledevelopmentsthatmayholdthekeytosomanyofourdilemmasforourfutureenergyusage.
Monodraughthavetwofull-timeResearchersbasedatNottinghamUniversitywithapermanent
EnvironmentalTestChambertomonitorandassesstheperformanceofSUNPIPE®andWINDCATCHER®systemsonacontinuingdevelopmentbasis.
ProfessorMikeWilsonisdevelopinganumberofsystemswithMonodraughtbutspecifically
acompositelightingunitthatincorporatesastandardSUNPIPEwithLEDsembeddedintothesurround.Asolarpanelatrooflevelconnectstoasolarbatteryandthiswillprovide24hourlighting.Aprototypeisnearingcompletion.
A2-yearStudyhasbeenspentondevelopingacomputerisedpredictionmodelandanumber
ofPapershavebeenwrittenontheirSUNPIPEdevelopment.
MonodraughtResearch&Development
AnumberofProjectsarecurrentlybeingassessedtopromote
theapplicationofnaturalventilationsystemsaspartofa4yearstudyintosolarpoweredventilation.AconsiderablenumberofbothWINDCATCHERandSUNCATCHERsystemshavebeeninstalledattheUniversity.
A4yearprogrammeofresearchisbeingcarriedoutintointernalenvironmentalconditionsofnaturalventilation
strategiesonawiderangeofProjectsrangingfromSchools,CollegesandAcademiestoofficesandCommunityCentres.
ConsiderableresearchhasbeencarriedoutintotheperformanceofSUNPIPEsystemsundervarying
conditionsandcontinuousassessmenthasbeencarriedoutonthebenefitsoflightpipesandhumanresponses.
OtherUniversitiesandTestHousesWorkhasalsobeencarriedoutatLoughboroughUniversityandUMIST,aswellasatBREandBSRIAontheapplicationofWINDCATCHERnaturalventilationsystems.FullcopiesofalltheseReportsareavailableonrequestfromMonodraught.
CarbonTrustandDTIAwardsTwomajorfundingawardshavebeenmadetoMonodraughtin2006toresearchPCM(PhaseChangeMaterials)andEvaporative&DesiccantcoolinginconjunctionwithNottinghamUniversityandBillDunsterArchitects.
LONDONmetropolitan
university
NAPIER UNIVERSITYEDINBURGH
BrunelUNIVERSITYW E S T L O N D O N
THE UNIVERSITY OF LIVERPOOLINVESTING IN KNOWLEDGE
Choking risks to childrenGOVERNMENT CONSUMER SAFETY RESEARCH
under four from toys and other objects
Department of Trade and Industry
23
Maintenanceandpaybackperiod
Energy free. Maintenance free.
Detail of WINDCATCHER
Withenergycostssettorise,yearonyear,thewholeconceptofanaturalhealthy
‘airconditioning’systembeingenergyfreehasenormousadvantages.
However,itisnotjusttheconceptofenergyfree,
winddrivenventilationthatissoattractive.Withno
fansormechanicalparts,thereisnonoise,nofilters
toclean,andthereisnothingtowearoutorreplace.
Traditionalventilationsystemcomponentsneedregular
maintenanceandfiltersconstantlyneedcleaningor
replacement,however,WINDCATCHER®naturalventilation
systemsrequirenomaintenanceotherthananannual
check.Monodraughtprovidethefirstannualcheckfreeof
charge,whichincludesacompletecleanandcheckonthe
programmeddamperoperation.ThereafterMonodraught
provide10yearcleanandmaintenanceprogrammefora
nominalannualfee.
24MonodraughtWINDCATCHER
Freshair in
Staleair out
Control dampers
Ceilingdiffuser
CaseStudy
W H Smith Headquarters, SwindonConsultant:Mr Geoff Peters, Applied Energy
TheseAwardwinningofficeswerebuiltin
1985andweredesignedasalowenergy
structurewithoutairconditioningormechanical
ventilation.Sincethen,theincreaseduseofPCs,
theincreasednumberofstaff,andtheeffectsof
highersummertimetemperatureshasmeantthat
theinternalenvironmenthadbecomeunbearable
by1999.27N°Monodraught1000mmsquare
WINDCATCHERsystemswereinstalledat
approximately25%ofthecostofequivalentair
conditioningandtheresultshavebeenremarkable.
Allproblemsofoverheatingandpoorairquality
havebeeneliminatedandthe500staffnowenjoy
freshairintotheirofficesthroughouttheyear.
Becausetherunningcostsarezero,the
Accountsdepartmentarethehappiestofall!
PLAN
air out
air in
Starhurst School
Monodraughtsystemsareasversatileastheyareinnovative.Theycanalsobeusedonawiderangeofconventional
dischargeorventarrangements.Monodraught’semphasisonhighqualitydesignmeansthatthey
cancomplimentanysurroundingsandcanbemanufacturedto
virtuallyanyshapeordesign.
Monodraught'sTerminalsystemsmimictheappearance
oftheWINDCATCHERsystemsbuthaveadifferent
internalconfigurationtoallowfordedicatedintakeor
exhaustrequirements.Theterminalcanalsobedesigned
toaccommodatemultipleintakesorexhaustsandcanbe
incorporatedinonesystem.
MonodraughtWINDCATCHERBespokeSystems 25
BespokeSystems
Goldmiths DMC Building
Blue Water Retail Park
Sainsburys Gloucester Quays Rye Primary School
Tesco Eco-store, Cheetham Hill
Tailor-made for your environment
Monodraughtemployatotalof12installationteams,alldirectemployeesofMonodraughtand
operatingfromafleetofMercedesBenzSprintervans,whichcoverthewholeoftheUK.Inthemajorityofcases,Monodraughtwillprovideacompleteinstallationservice.However,buildersworkisrequiredinadvanceoftheMonodraughtattendanceonsiteoralternatively,Monodraughtsystemscanbesuppliedforthebuildertoinstallthemselves.
Aluminium Roofs Forastandingseam/aluminiumprofileroof
aweldedupstandshouldbeprovidedbythe
roofingcontractoraspartofthenormalroof
coverings.AlternativelyMonodraughtcan
includethisworkaspartoftheirpackage.
Slate or Tile RoofsForaslateortileroof,an18mmexternal
qualityplywoodupstandisrequired,
coveredwithCode4leadandthisis
normallytobeprovidedbythebuilder.
Flat RoofsForaflatroofofasphaltorbuilt-upfelt
roofing,Monodraughtcanprovidea
galvanisedorGRPflashingtobebuiltinby
thebuilder.Alternatively,aconventional
plywoodupstandshouldbespecified.
Single Ply MembraneForasingleplymembraneroofsuchas
Sarnafil,Monodraughtcanprovideasoaker
sheetthatisfittedtotheroofdeckandthe
singleplymembraneisheatsealedinplace.
WINDCATCHERInstallation
Installation
26MonodraughtInstallation
MonodraughtTheMonodraughtPromise 27
Monodraught
The promise
Uponcompletionofthebuildingpriortohand-over,Monodraught’s
ControlSpecialistswillattendsitetocommissionthecontrolpackage
toensurethatthecontrolstrategiesarecorrectlyprogrammed
totheparticularrequirementsoftheproject.Uponcompletion
ofthevisitafullreportwillbeprovidedoutlininganynon-
complianceandacertificatewillbeissuedaccordingly.
Ifrequired,somesettingscanbeadjustedduringthe
commissioningvisitsuchasoverridetimeintervals.
Afterthebuildinghasbeenhandedoverandoccupied,Monodraught’s
ControlSpecialistscanreturntositebyappointmentandafter
discussionswiththeManagerofthebuilding,will‘finetune’the
controlstrategyifrequiredtoreflecttheclient’srequirements.
Commissioning
AparticularfeatureofMonodraughtsystemsistheemphasisonlow
maintenance.WINDCATCHER®naturalventilationsystemsmanufactured
inGRParecoveredbyaunique10yearguarantee.Anannualmaintenance
Contractisofferedtoclientswhichcoversroutineperiodicmaintenance
suchascleaningofthediffuser.Anydampersandcontrolsfittedtothe
systemswillbecoveredbythemanufacturer'swarranty.Theguarantee
details,termsandconditionsareavailablefromourwebsite.
Maintenance
Modelling
Estimated ventilation rate over time
Monodraughthasdevelopedabespokesoftwarepackagetomodelnaturalventilationin
buildingsthatincorporatesaquasi-dynamicthermalmodel.NAVENSYSallowsMonodraught’s
designengineerstoapplyweatherdatafromalmostanyweatherstationintheworld,scale
itappropriatelyaccordingtothelocaltopography,andtoinputthetypeandgeometryof
abuildingandzone,theconstituentpartsofitsenvelopeandfabricandthepatternsof
occupancy.Italsoallowstheengineertoseetheeffectsofdifferentcontrolstrategieson
ventilationperformanceandtodetermine
ifstatutoryorguidelinessuchasBREEAM
requirementsofventilationrate,internal
airtemperatures,andcarbondioxide
concentrationsarelikelytobemet.
InadditiontoNAVENSYSMonodraught
hasinhouseexperienceofTAS,IESand
ENERGY+dynamicthermal
Modellingsoftware.
Weather rose showing wind speed and direction as a percentage, using Data acquired from CIBSE
Part of the VKR Group
The VKR Group's mission is to bring daylight, fresh air, solar energy and a better environment into people's everyday lives. VKR Holding is the parent company of the VKR Group and owns brands such as VELUX roof windows, VELFAC and Rationel vertical windows as well as WindowMaster and European thermal solar companies.
Halifax House, Cressex Business Park,
High Wycombe, Buckinghamshire
HP12 3SE
Tel: 01494 897700
Fax: 01494 532465
email: [email protected]
www.monodraught.com
Febr
uary
201
1
SUNPIPE, SOLA-BOOST, SOLA-VENT, SUNCATCHER, WINDCATCHER and ACTIVLOUVRE are registered trademarks owned by Monodraught Limited
