Using Phase Change Materialsin construction for a moresustainable built environmentPresented byFor further information please contactJeremy Sumeray, Head of Sustainability, Armstrong Building Productsjsumeray@armstrong.com07833 444510
Help you to be better able to understand where andhow Phase Change Materials can be used to create amore energy efficient and comfortable environment
3When to consider Phase Change MaterialsAs part of a low-carbon energy strategy for new build and refurbishmentsImproving thermal comfort for the occupantsOverheating spaces with high demand for air conditioning12639 ampmOUTININIn the hot afternoon, the PCM cassettessuck up the heat and keep the room pleasantly cool.
4PCM needs to be cooled in the evening to re-setBest suited for classrooms, offices, retail, healthcare12639 ampmOUTININIn the evening, the PCM cassettes release the heatand the room is purged ready for the next dayWhen to consider Phase Change Materials
5PCM – thermal mass effectHEAT ENERGYTpLatent HeatSOLIDLIQUIDEquivalent thermal mass3cm plaster, containing 30% PCM14cm concrete18cm bricksPCM’s provide lightweightthermal mass
6PCM Theory – thermal mass effect18202224262830323410/0700:0010/0712:0011/0700:0011/0712:0012/0700:0012/0712:0013/0700:0013/0712:0014/0700:0014/0712:0015/0700:00Without PCMWith PCMTemperature°CRule of thumb:≥3kg/m² floor spaceComparison Air Temperatures [°C]Comfort ZoneStabilizedDate and Time
7BASF MicronalPicture: BASFPicture: BASFMicrocapsules as packagingHuge surface/volume-ratio -> fast heat transferParaffin corePolymer shellPolymer coatingWaxMelting Point:23C / 26C
8• Fire Reaction – Protect PCM fromfire to achieve minimum performance• Cutting – Do not cut PCM cassettes• Health Concerns – As this PCM ismicroencapsulated it causes nohealth concerns. The PCM will notleak out of the product and theplasterboard it is implanted in can berecycled in existing streams.• Installation – Care when handlingand Grid strengthening• Maintenance - Standard cleaningprocedure and no ongoingmaintenance to the PCMHealth and Safety ConsiderationsPCM CassetteAcoustical tile
9PCM cassettes absorbs heat and stabilises room temperature26oC 22oCA cooler surface temp. Also improves the thermal comfort of the space15171921232527299 10 11 12 13 14 15 16 17 18 19 20 21 22 23 2426oC +/- 2.0oC Standard ceiling22oC +/- 1.0oC PCM ceilingHour of the daySurface 1Ch11 [C]
10PCM ceiling tiles with Natural VentilationBelvoir High SchoolPCM ceiling tile
13Case StudyAdd quote hereTest ConditionsStructure: Insulated Thermal Test ChamberHVAC System: 1.Displacement ventilation; 2.Overhead air; 3.Overhead air ductedreturnLocation: BSRIA , Bracknell, UKRoom Size: 16 m2Ceiling Coverage with CoolZone: 0, 30, 57 %Thermal Storage: 0, 662, 1,260WhApplied Cooling Load: 30, 60 W/m2Air Circulation Rate: 2.5, 4.1, 11.1 l/s m2Purge Temperature: 14, 18 0CDisplacement Ventilation System• 662Wh of thermal storage delayed the operation of the air conditioner by 1:20 hours with a 30 W/m²load• 1,260Wh delayed this by 4:27 hours.• The PCM tiles typically reduced temperature variations on the ceiling to +/- 1ºC.
14It is a passive solution, and maintenance freePCM Plays a Role in Supporting High-Performing Real EstateReduces Air Conditioned energy usage by 25 to 50 [%]Offset daytime energy using low energy strategies at night –load shiftingReduces temperature variations, improving thermal comfortImproves energy performance of the building (DECs & CRC)Better lettable rates for low energy buildingsFuture proof - can add tiles at a later dateFlexibleLong term portable assetEasy toincorporateinto existingbuildingsCan bemoved withinthe room ormoved room-to-roomCan locatetiles whereneeded todeal with highheat-load
15SummaryDirect reduction in energy consumptionImproved thermal comfortAvoid cold draughts, air dumping and peak summertimetemperaturesA passive but controllable solution for ventilation and cooling
16ANY QUESTIONS?For further information please contactJeremy Sumeray, Head of Sustainability, Armstrong Building Productsjsumeray@armstrong.com07833 444510