Cooling and Heating Season Impacts of Right-Sizing of Fixed- and Variable-Capacity Heat Pumps With Attic and Indoor Ductwork
- Building America Partnership for Improved Residential Construction, Cocoa, FL (United States)
A new generation of full variable-capacity air-conditioning (A/C) and heat pump units has come on the market that promises to deliver very high cooling and heating efficiency. The units are controlled differently than standard single-capacity (fixed-capacity) systems. Instead of cycling on at full capacity and cycling off when the thermostat is satisfied, the new units can vary their capacity over a wide range (approximately 40%–118% of nominal full capacity) and stay on for 60%–100% more hours per day than the fixed-capacity systems depending on load-to-capacity ratios. Two-stage systems were not evaluated in this research effort.
- Research Organization:
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Energy Efficiency Office. Building Technologies Office
- Contributing Organization:
- Building America Partnership for Improved Residential Construction, Cocoa, FL (United States)
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1215272
- Report Number(s):
- NREL/SR-5500-64274; DOE/GO-102015-4678
- Resource Relation:
- Related Information: Work performed by Building America Partnership for Improved Residential Construction, Cocoa, Florida.
- Country of Publication:
- United States
- Language:
- English
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