Experimental Design and Laboratory Characterization of a Medium- and High-Efficiency Rooftop Unit for use in Building Energy Simulations
Conference
·
OSTI ID:1558884
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Commercial rooftop units that incorporate variable speed components are quickly entering into the market place; however, the design and modeling tools that calculate the energy benefits of these units cannot properly estimate performance. This is due to two factors: 1) There are insufficient measured performance data of real systems that can be entered into these simulations, and 2) building energy simulators are unable to properly interpret performance data. Therefore, publicly available datasets designed to encompass the entire performance map coupled with control sequence information are needed as inputs for these modelling programs to accurately estimate energy savings and promote variable speed RTUs. As part of the Verification and Uncertainty Characterization for Energy Simulation milestone funded by the Department of Energy, the National Renewable Energy Laboratory recorded and published data across the entire performance range for two commercially available RTUs; one with a two-stage compressor and variable speed supply fan, and another with a fully variable speed compressor, supply fan and condenser fan. This paper details 1) how the design of experiments was created as well as how the units were controlled, and 2) the operational limitations of the two units. The paper will also discuss methods for building energy simulation programs to properly interpret these data sets and integrate them into building energy simulation models.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1558884
- Report Number(s):
- NREL/CP-5500-71133
- Country of Publication:
- United States
- Language:
- English
Similar Records
End-Use Savings Shapes Measure Documentation: Heat Pump Rooftop Units
Energy performance evaluation of variable-speed packaged rooftop units using field measurements and building energy simulation
Performance Evaluation of Three RTU Energy Efficiency Technologies
Technical Report
·
Wed Aug 28 20:00:00 EDT 2024
·
OSTI ID:2439548
Energy performance evaluation of variable-speed packaged rooftop units using field measurements and building energy simulation
Journal Article
·
Mon Dec 31 23:00:00 EST 2018
· Energy and Buildings
·
OSTI ID:1501832
Performance Evaluation of Three RTU Energy Efficiency Technologies
Technical Report
·
Mon Nov 30 19:00:00 EST 2020
·
OSTI ID:1756704