A new “wireless on-off control” technique for adjusting and metering household

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1、AppliedThermalEngineering36(2012)202e209ContentslistsavailableatSciVerseScienceDirectAppliedThermalEngineeringjournalhomepage:www.elsevier.com/locate/apthermengAnew“wirelesson-offcontrol”techniqueforadjustingandmeteringhouseholdheatindistrictheatingsystema,*bbLanbinLiu,LinFu,YiJiangaSchoolofMechani

2、calEngineering,UniversityofScienceandTechnology,Beijing,PRChinabDepartmentofBuildingScience,SchoolofArchitecture,TsinghuaUniversity,Beijing,PRChinaarticleinfoabstractArticlehistory:Fieldtestresultsshowthat20%e30%ofthermalenergyiswastedbecauseofpoorheatingsystemReceived1December2010regulationinChina

3、.Inordertosolvetheseproblems,anew“wirelesson-offcontrol”systemforAccepted19November2011adjustingandmeteringhouseholdheatisproposed.Thetechnologyworksinthefollowingway:1)Availableonline7December2011acalorimeterisinstalledineachbuildingtomeasurethetotalheatconsumptionofthebuilding;2)on-offvalvesarein

4、stalledineachhouseholdwithanindividualindoortemperaturecontrolprovided.TheKeywords:roomtemperaturecanbemaintainedbycontrollingthevalvesaccordingtotheon-timeratiowhichisOn-offcontrolpredictedbythethermalstrategies;and3)theheatingcostofeachhouseholdcanbeallocatedaccordingOn-timeratiototheheatingareaa

5、ndtheaccumulativeopentimeofthevalve.TheproposedtechniquehasbeenHeatmeteringappliedintwenty-fiveresidentialcommunitieswithatotalareaof2,500,000m2.ThetestresultsshowHeatallocationthat:1)indoortemperatureswereaccuratelycontrolledwithin0.5Cofthesetpoint;2)theEnergy-savinganddistrictheatingsystemtemper

6、aturedifferenceindifferentroomsislessthan1C;3)energyconsumptioninthehouseholdsusingacontrolledsystemwasapproximately30%lowerthanasimilarwithinasimilarbuildingtypewithanuncontrolledsystem.Ó2011ElsevierLtd.Allrightsreserved.1.Introductionalackofmotivationforhouseownerstochangeduetothewayenergyuseis

7、currentlycharged.Thesurveyresultsindicatedthattherearetwofactorsrespon-sibleformakingheatingenergyconsumptioninnorthernChinaPoorregulationofthecontrolsystemaccountsfor15%e40%ofapproximately30%higherthanwhat