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Joseph Petersen, Pacific Northwest National Laboratory |
The use of heat pump water heaters (HPWH) in the residential sector will provide theoretical energy
savings of up to 63% per water heater over a typical electric resistance water heater (ERWH). However,
to a utility, energy-efficient technologies are the most desirable when they provide grid stability and
control benefits through demand-response (DR) capabilities. This presentation will discuss the DR
performance of various HPWHs compared to an ERWH as demonstrated by experiments using the side-
by-side PNNL Lab Homes. Experiments included testing each water heater for two typical
types of DR events: peak curtailments due to oversupply, and balancing reserves.