End-Use Savings Shapes Measure Documentation: Heat Pump Rooftop Units

Technical Report · Thu Aug 29 00:00:00 EDT 2024

DOI:https://doi.org/10.2172/2439548· OSTI ID:2439548

CaraDonna, Chris ^[1]; Parker, Andrew ^[1]; Meyer, Ryan ^[2]

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1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
2. Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)

The heat pump rooftop units (RTUs) measure replaces gas furnace and electric resistance RTUs with high-efficiency heat pump rooftop units (HP-RTUs). The HP-RTUs are intended to be top-of-the line, including high-efficiency fans and heat pump systems. The fans are variable speed, allowing the HP-RTUs to operate as single-zone variable air volume systems. The heat pumps are also variable speed, allowing for high part load performance. All schedules in the existing RTUs are transferred to the new HP-RTUs for consistency. Furthermore, any energy efficiency features in the existing baseline RTUs such as energy recovery or economizers are also transferred to the new HP-RTUs for consistency. This measure is applicable to approximately 45% of the ComStock floor area. The HP-RTU measure demonstrates 10.3% total site energy savings (449 trillion British thermal units [TBtu]) for the U.S. commercial building stock modeled in ComStock.

• Research Organization: National Renewable Energy Laboratory (NREL), Golden, CO (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office
• DOE Contract Number: AC36-08GO28308
• OSTI ID: 2439548
• Report Number(s): NREL/TP--5500-86585; MainId:87358; UUID:84481b20-f06f-48d0-9fc5-e063eabaffcf; MainAdminId:73552
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
building stock modeling
commercial buildings
ComStock
decarbonization
energy modeling
heat pump rooftop units
heat pumps