Paper Conference

Proceedings of eSim 2018: 10th Conference of IBPSA-Canada


Characterizing smart thermostats’ operation in residential zoned heating systems and their impact on energy saving metrics

Nilson Henao, Michael Fournier, Sousso Kelouwani

Abstract: The emergence of line-voltage communicating thermostats (LVCT) prompts for new opportunities for energy management in homes equipped with heating systems such as baseboard heaters. To capture either energy savings or demand response opportunities, one should first determine how the technology is actually used in homes where each room is in a different thermal zone. This study takes advantage of data collected from about 300 LVCTs over a heating season. In this paper, the occupants’ preferences in terms of comfort set-points and habits of performing temperature setbacks are analyzed. Such knowledge is valuable for building energy simulation and allows to discuss how the EnergyStar Smart Thermostats energy savings metric, designed with single zone central HVAC systems in mind, would perform for baseboard heaters or other heating systems zoned at the room level. Accordingly, this paper investigates the impact of the selection of a zone-based reference temperature versus a home-based reference temperature.
Keywords: Baseboard heaters, thermostats utilization, energy savings, EnergyStar HVAC Heating, Ventilation and Air-Conditioning PT Programmable Thermostats PCT Programmable Communicating Thermostats LVCT Line-Voltage Communicating Thermostats DR Demand Response BCT Baseline Comfort Temperature BD Business Days WE Weekend and Holidays ATR Acceptable Temperature Range LCR Low Comfort Range UNR Uncomfortable Range HTR High Temperature Range
Pages: 17 - 25