Did you know space heating is the largest energy user in residential homes—and the greatest opportunity for decarbonization? Heat pumps, celebrated for their energy efficiency, can also stabilize the grid through demand flexibility, making them a game-changer for energy resilience. However, in cold climates, winter demand response (DR) capabilities of heat pumps require further testing to ensure reliability and comfort.
That’s where our research at PNNL comes in. For the 2024-2025 winter season, we’re conducting a field study with 15-20 homes to evaluate how grid-enabled heat pumps perform in real-world cold climate conditions. Our goals include:
- Assessing performance: Measuring demand reduction, occupant comfort, and system operation during harsh winters.
- Optimizing DR strategies: Testing protocols like setpoint adjustments to align energy savings with grid needs.
- Creating actionable guidelines: Offering insights to improve DR program success and real-world efficiency.
- Advancing innovation: Using field data to inspire new winter-focused DR solutions.
By participating, you'll help shape the future of sustainable heating while contributing to the development of resilient energy solutions. As an incentive, we are offering two $250 gift cards for participants' ongoing involvement in this ground-breaking research.
Ready to learn more? Visit our website for updates, or email Chitra Nambiar at chitra.nambiar@pnnl.gov.
Examples and Key Publications from PNNL Grid-enabled Heat Pump Research to Date:
- Chitra Nambiar, Stefano Schiavon, Gail Brager, Samuel Rosenberg, Assessing thermal comfort and participation in residential demand flexibility programs, Energy and Buildings, Volume 328, 2025, 115153, ISSN 0378-7788, https://doi.org/10.1016/j.enbuild.2024.115153.
- 2024 BTO Peer Review: Load Flexibility with Heat Pumps https://www.energy.gov/sites/default/files/2024-11/bto-peer-2024-14119a-Load-Flexibility-Heat-Pumps-Nambiar.pdf
- Rosenberg S.I., C. Chandrasekharan Nambiar, E. Vlachokostas, and A. Rees. 2024. "Load Flexibility with Ductless Heat Pumps in Rural Cold Climates." In 2024 ACEEE Summer Study on Energy Efficiency in Buildings. PNNL-SA-200646. https://www.aceee.org/sites/default/files/proceedings/ssb24/pdfs/Load%20Shifting%20with%20Ductless%20Heat%20Pumps%20in%20Rural%20Cold%20Climates.pdf
- Nambiar C., S.I. Rosenberg, and T. Peffer. 2024. "Enhancing Participation in Residential Demand Response: Insights from Case Studies Conducted in Alaska and California." In 2024 ACEEE Summer Study on Energy Efficiency in Buildings. PNNL-SA-195671. https://www.aceee.org/sites/default/files/proceedings/ssb24/assets/attachments/20240722163114390_48b05f01-6957-4c73-b1d9-f213746d440d.pdf
- Rosenberg S.I., and E. Vlachokostas. 2022. Load Shifting with Space Conditioning Heat Pumps During Heating Season in the Pacific Northwest. In Proceedings of the 15th International Conference on Thermal Performance of the Exterior Envelopes of Whole Buildings (Buildings XV), December 5-8, 2022, Clearwater Beach, FL, 427 - 434. Peachtree Corners, Georgia: American Society of Heating Refrigerating and Air-Conditioning Engineers (ASHRAE). PNNL-SA-178436. https://www.proquest.com/openview/55550fa595356a7273b8c8a8ac4f0f30/1?pq-origsite=gscholar&cbl=5014767