Energy saving potential with smart thermostats in low-energy homes in cold climate

dc.contributorAalto Universityen
dc.contributor.authorKull, Tuule Mall
dc.contributor.authorPenu, Karl Rihard
dc.contributor.authorThalfeldt, Martin
dc.contributor.authorKurnitski, Jarek
dc.contributor.departmentTallinn University of Technology
dc.contributor.departmentDepartment of Civil Engineering
dc.description.abstractSmart home systems with smart thermostats have been used for years. Although initially mostly installed for improving comfort, their energy saving potential has become a renowned topic. The main potential lies in temperature reduction during the times people are not home, which can be detected by positioning their phones. Even if the locating is precise, the maximum time people are away from home is short in comparison to the buildings' time constants. The gaps are shortened by the smart thermostats, which start to heat up hours before occupancy to ensure comfort temperatures at arrival, and low losses through high insulation and heat-recovery ventilation in new buildings, which slow down the cool-down process additional to the thermal mass. Therefore, it is not clear how high the actual savings can be for smart thermostats in new buildings. In this work, a smart radiator valve was installed for a radiator in a test building. Temperature setback measurements were used to calibrate a simulation model in IDA ICE. A simulation analysis was carried out for estimating the energy saving potential in a cold climate for different usage profiles.en
dc.description.versionPeer revieweden
dc.identifier.citationKull , T M , Penu , K R , Thalfeldt , M & Kurnitski , J 2020 , ' Energy saving potential with smart thermostats in low-energy homes in cold climate ' , E3S Web of Conferences , vol. 172 , 09009 .
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dc.publisherEDP SCIENCES
dc.relation.ispartofseriesE3S Web of Conferencesen
dc.relation.ispartofseriesVolume 172en
dc.titleEnergy saving potential with smart thermostats in low-energy homes in cold climateen
dc.typeConference articlefi