Conference Paper

Proceedings of Building Simulation 2019: 16th Conference of IBPSA

     

Quantifying the Value of Unitary Thermal Storage Systems (UTSS) - A Modeling Study

Karl William Heine 1, Paulo Cesar Tabares Velasco 1, Michael Deru 2, Ben Polly 2
1 Colorado School of Mines, United States of America
2 National Renewable Energy Laboratory (NREL), United States of America

DOI: https://doi.org/10.26868/25222708.2019.210505
Abstract: An EnergyPlus object model for Unitary Thermal Storage Systems exists, but it is not currently available to OpenStudio (OS) for parametric analysis. This study presents an OS measure to apply UTSS to existing building models for the purpose of exploring design alternatives. Four metrics are proposed to quantitatively compare these systems: load shifting effectiveness, energy increase intensity, penalty ratio, and an effective COP for UTSS operation. Preliminary results show that applying the measure to retail and small office models, average annual site energy use increases relative to the shifted load by 17.3% and 16.3%, respectively. However, under example time-of-use utility rates, average annual energy bill savings of 8.0% for retail and 4.8% for small office are achieved with UTSS.
Keywords: Thermal Storage, TES, Ice, OpenStudio
Pages: 1684 - 1691
Paper:

BS2019_210505