Smart Thermostats DR Performance


Smart thermostats are becoming the major contributor of residential DR programs. Deemed values or manufacturer’s claimed values are typically used for utility DR program evaluations. However, they may not represent the actual performance in a specific DR program or provide full insights of a DR event. This presentation will provide how CLEAResult takes advantage of 15-min interval demand data, calculates actual curtailments at the program level, and then determines specific characteristics such as participation rate, average curtailment per participant and per thermostat, and total curtailments during each event. In addition, regression models for participants and non-participants can help in identifying more thermostat operating patterns such as pre-cooling spikes, curtailment profiles, and post rebounds. These profiles can help utility understand grid impacts from smart T-stats, and then develop proper mitigation plans for pre-cooling spikes and post rebounds if necessary. Furthermore, this presentation will evaluate the relationship between thermostat curtailment performance and ambient temperature. For example, higher temperature may lead to higher cooling curtailment potential per participant, but it may also result in lower participation rates, because DR customers have the flexibility for full participation, partial participation, and op out.

Presented By

Yuming Qiu, Ph.D., P.E., C.E.M., C.M.V.P.
Senior Engineer

Yuming Qiu is a senior engineer with CLEAResult. He holds a Ph.D. in Mechanical Engineering and is a Professional Engineer, a Certified Energy Manager, and a Certified Measurement and Verification Professional. He has over ten years of experience in energy efficiency, demand response, and project management. Yuming provides technical program management and leadership across CLEAResult’s regions and EE/DR programs.  He works with a multitude of commercial and industrial sectors and brings technical expertise to reduce energy and demand. He specializes in design and implementation of cutting-edge C&I retrofit or new construction programs.