Planned enhanced modeling approach to facilitate analyses of wrapped-tank options for the project.

Planned enhanced modeling approach to facilitate analyses of wrapped-tank options for the project.

Image: Oak Ridge National Laboratory.

Lead Performer: Oak Ridge National Laboratory – Oak Ridge, TN
FY16 DOE Funding:  $150,000
Project Term: October 1, 2015 – TBD
Funding Type: Annual Operating Plan (AOP)

PROJECT OBJECTIVE

Residential heat pump water heaters (HPWH) that use carbon dioxide (CO2) as refrigerant have not been successful in the U.S. market thus far, primarily due to cost. The objective of this project is to evaluate cycle configurations and system designs to determine the best path forward for cost-effective CO2-based electric HPWH targeted for commercial water heating applications, where delivery of higher temperature water (an inherent advantage of CO2 systems) is valued in the market.

Initially current technology advancements related to CO2 HPWHs will be evaluated for applicability to the U.S. market. Assuming sufficiently promising (efficient and cost-competitive) options are identified, ORNL and a CRADA partner will collaborate to advance the development to a field test prototype evaluation stage. Performance and cost targets are a primary energy factor of ≥0.81 and a cost premium of ≤$11.94/gallon installed. 

PROJECT IMPACT

Assuming the project field test prototype meets the performance and cost targets above, the CRADA partner would be encouraged to advance the development to a production model for the U.S. commercial buildings market. Successful development will ensure market availability of efficient electric HPWHs with reduced global environmental impact.

CONTACTS

DOE Technology Manager: Tony Bouza
Lead Performer: Van Baxter, Oak Ridge National Laboratory