Peak cooling load shift capability of a thermal energy storage system integrated with an active insulation system in US climate zones

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Abstract

This study aims to evaluate a thermal energy storage (TES) system integrated with an active insulation system (AIS) to form a TES + AIS integrated wall system as a partition and as a secondary cooling system to shift the peak load and reduce cooling energy consumption. To understand and demonstrate its cooling performance, the TES + AIS integrated wall system was installed in an office building in Oak Ridge, Tennessee. To investigate the effect of the TES + AIS integrated wall system in a typical office building and various climate zones, the US Department of Energy's prototype office building model was modified to accommodate the proposed system. Results showed that the minimum size of the proposed system to achieve energy savings varies depending on climate conditions. The minimum size of the proposed system for cooling energy saving and shifting peak cooling demand in climate zones 2, 3, and 5 is 29.7 m2, whereas it is 44.6 m2 in zones 4 and 6. By installing the minimum size of the proposed system, 11.3 % to 16.4 % of cooling energy can be shifted during discharge hours in a representative summer day.

Original languageEnglish
Article number112484
JournalEnergy and Buildings
Volume277
DOIs
StatePublished - Dec 15 2022

Funding

This material is based upon work supported by the US Department of Energy’s (DOE’s) Office of Federal Energy Management Program (FEMP). This research used resources of Oak Ridge National Laboratory’s Building Technologies Research and Integration Center, which is a DOE Office of Science User Facility. This work was funded under DOE FEMP activity no. EL1710000. This manuscript has been authored by UT-Battelle LLC under contract DEAC05-00OR22725 with DOE. The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. This material is based upon work supported by the US Department of Energy's (DOE's) Office of Federal Energy Management Program (FEMP). This research used resources of Oak Ridge National Laboratory's Building Technologies Research and Integration Center, which is a DOE Office of Science User Facility. This work was funded under DOE FEMP activity no. EL1710000. This manuscript has been authored by UT-Battelle LLC under contract DEAC05-00OR22725 with DOE. The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes.

Keywords

  • Active insulation system
  • Cooling energy consumption
  • Peak cooling load
  • Thermal energy storage system

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