2008.building and environment.wong, l. t

1、BuildingEnvironment43(2008)1–6Amultivariatelogisticmodelfacceptanceofindoenvironmentalquality(IEQ)inofficesL.T.Wong?K.W.MuiP.S.HuiDepartmentofBuildingServicesEngineeringTheHongKongPolytechnicUniversityHongKongChinaReceiv

2、ed13September2006receivedinrevisedfm9January2007accepted9January2007AbstractTheindoenvironmentalquality(IEQ)inofficesisexaminedfromtheprospectofanoccupant’sacceptanceinfouraspects:thermalcomftindoairqualitynoiselevelillu

3、minationlevel.Basedontheevaluationsmadeby293occupantsoftheIEQofofficesinHongKongempiricalexpressionshavebeenproposedtoapproximateanoverallIEQacceptanceofanofficeenvironmentatcertainoperativetemperature(To)carbondioxideco

4、ncentration(CO2)equivalentnoiselevel(Leq)illuminationlevel(lux).TheoverallIEQacceptanceiscalculatedfromamultivariatelogisticregressionmodel.Arangeofacceptanceintypicalofficeenvironmentalconditionsitsdependenceonthefourpa

5、rametersstatedabovearedeterminedfdesignconditions.TheproposedoverallIEQacceptancecanbeusedasaquantitativeassessmentcriterionfanofficeenvironmentsimilarenvironmentwhereanoccupant’sevaluationisexpected.r2007ElsevierLtd.All

6、rightsreserved.Keywds:IndoenvironmentalqualityMultivariatelogisticregressionFieldsurveyAirconditionedoffices1.IntroductionTodaytheconceptofanacceptableindoenvironmentalquality(IEQ)asanintegralpartofthetotalbuildingperfma

7、nceapproachisstillnotfullyappreciated.Physicalenvironmentalparameterssuchasairtemperaturerelativehuityacousticsairqualitylightingventilationairdistributionareallinterrelatedthefeelingofcomftisacompositestateofanoccupant’

8、smindrespondingtothesensestothesefacts[1–4].Thisstateofmindisanintricateresponsetotheindoenvironmentalfactgroupsincludingphysicalenvironmentsustainedbythebuildingitsservicessystemindividualphysiologicalconditionssuchashe

9、althsocialrelationsfinancialstateetc.Studiesshowedthatanoccupant’sacceptanceofanenvironmentdependedonanumberofenvironmentalparameters[5].Fourbasiccomponentsnamelythermalcomftindoairqualityauralvisualcomftwereidentifiedfd

10、etermininganacceptableIEQ.Conventionalstudiesonindoenvironmentaddresseachofthemseparately.Theyarestilladdressedindependentlybydesignersfmanyofficedesigns.Merecentlytheequivalenceofthediscomftcausedbydifferentphysicalqual

11、itieshasbeenconsidered[6–8].Discomftscausedbyindoairpollutionthermalloadnoisewereinvestigated.Itwasreptedthatatanoperativetemperaturebetween23291CeachdegreeCelsiuschangewouldassociatethesameeffectonhumancomftwithachangei

12、nperceivedairqualityof2.4decipolachangeinnoiselevelof3.9dB[7].Flevelsofperceivedairqualityupto10decipolaunitchangehadthesameeffectonhumancomftasachangeinnoiselevelof1.2dB[6].Theequivalenceofacousticsensationtothethermalo

13、newasproposedfshttermexposurethateachdegreeCelsiuschangeintemperaturehadthesameeffectof2.6dBA[8].Wkplacevariablesinducingthelargestnumberofhealthsymptomscomftodourconcernswereinvestigatedbymultivariateregressionanalysis[

14、9–15].ItwasrealisedthatsuccessfulcontroloftheindoARTICLEINPRESSlocatebuildenv03601323$seefrontmatterr2007ElsevierLtd.Allrightsreserved.doi:10.1016j.buildenv.2007.01.001?Crespondingauth.Emailaddresses:(L.T.Wong)(K.W.Mui).

15、theoverallIEQacceptancewasevaluatedbyastatisticw2test.ResultsshowedthatallthefourparameterscontributedtotheoverallIEQthesignificancebetweentheacceptancevotesonthelatterthoseonthefmerrankingfromthemostimptanttotheleastwas

16、asfollows:p3:3?10?20fthermalenvironmentp5:2?10?16fairqualityp7:1?10?8fnoiselevelp5:8?10?6filluminationlevel.TheoverallIEQacceptanceyfanofficeenvironmentperceivedbyanoccupantexpressedbyamultivariatelogisticregressionmodel

17、isproposedy1?11expk0P4i1kifizi??(7)wheretheregressionconstantsdeterminedfromthe293occupantevaluationsareki?15:026:094:884:743:708:i0...4.(8)Valuesofk1–k4confirmtherelativeimptanceofthefourcontributstoythelargerthevalueth

18、egreatertheimptance.Indeedinthesurveyedofficesmostofthereptsonunsatisfactyenvironmentwererelatedtothermalcomft.Apparentlyoccupantswereverysensitivetotheoperativetemperatureascomparedwiththeotherthreeparameters.Variouscom

19、binationsofcontributsi1...4thecrespondingoverallIEQacceptancewereconsidered.Atotalofj24possibilitieswerefound.Takingthebinarynotationftheacceptancei.e.01f‘Unacceptable’‘Acceptable’respectivelyrankingthefourcontributsinth

20、ederfrommostimptanttoleastasshowninTable2thesurveyedoverallIEQacceptanceysofcasejisexpressedbyysjNf1N??jj1...16(9)whereNisthesurveysamplesizeNf1istheacceptancecount.Inthesurveythecaseofj1wasnotrecded.Atotalof7caseshadles

21、sthan10recdsonly2caseshadmethan30asshowninthetable.ItwasnotedthattheARTICLEINPRESSTable1Occupant’svotesonacceptanceofaperceivingindoenvironmentalqualityOverallacceptanceyVotesThermalenvironmentf1Airqualityf2Noiselevelf3I

22、lluminationlevelf4UAUAUAUAU1306268696140903595A1634159161471115212151Total29366227852085124247246U—unacceptableA—acceptable.Table2OverallIEQacceptanceCaseNo.SurveysampleNSurveyacceptanceysContributsPredictedacceptanceofI

23、EQyf1f2f3f410—00002.99?10?726000011.21?10?531000103.44?10?5418000110.001454001003.9?10?564001010.001677001100.00458260.1501110.150091010000.000110100.2010010.00531112010100.015012370.3810110.3792134011000.017014220.41110