Payne, V.
and Dougherty, B.
(2020),
Technology Development and Field Monitoring in nZEB, IEA HPT Annex 49: Design and Integration of heat pumps for nearly Zero Energy Buildings, [online], https://doi.org/10.2172/1665989, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=930716
(Accessed April 25, 2024)
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Technology Development and Field Monitoring in nZEB
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The International Energy Agency (IEA) Heat Pumping Technologies (HPT) Annex 49, "Design and Integration of Heat Pumps for Nearly Zero Energy Buildings," deals with the application of heat pumps as a core component of the HVAC system for nearly or net-zero energy buildings. This report covers Task 3 activities of the US team. Three institutions are involved on the US team and have worked on the following projects: • Oak Ridge National Laboratory summarized development activities since the conclusion of IEA HPT Annex 40 for several integrated heat pump (IHP) systems—electric ground-source (GS)-IHP and air-source (AS)-IHP versions and an engine-driven AS-IHP version. • The University of Maryland partnered with ORNL and Blue Bear Management and developed a personal cooling device, RoCo, that can provide personalized conditioned air to occupants in inadequately or even un-conditioned environments. With RoCo, building facility management can elevate the HVAC thermostat settings without compromising occupants' thermal comfort. Researchers have found that a 4F increase in thermostat settings can save 12 to 30% energy savings and therefore RoCo is a promising technology that can help reduce building energy consumption and facilitate achievement of nZEB performance. • The National Institute of Standards and Technology (NIST) is working on a field study effort on the NIST Net-Zero Energy Residential Test Facility (NZERTF). Two air-source, split system heat pumps were installed in a residential, net-zero energy home that was constructed as a laboratory on the campus of the National Institute of Standards and Technology (NIST) in Gaithersburg, Maryland USA. The first heat pump was a two-stage, 7 kW (2 ton), 15.8 seasonal energy efficiency ratio (SEER), 9.05 heating seasonal performance ratio (HSPF) conventionally ducted system, and the second heat pump was a variable-speed, 10.6 kW (3 ton), 14 SEER, 8.35 HSPF, high velocity ducted system.Citation
IEA HPT Annex 49: Design and Integration of heat pumps for nearly Zero Energy Buildings
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Created July 1, 2020, Updated February 23, 2022