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Title: Cooling and Heating Season Impacts of Right-Sizing of Fixed- and Variable-Capacity Heat Pumps With Attic and Indoor Ductwork

A new generation of central, ducted variable-capacity heat pump systems has come on the market, promising very high cooling and heating efficiency. They are controlled differently than standard fixed-capacity systems. Instead of cycling on at full capacity and then cycling off when the thermostat is satisfied, they vary their cooling and heating output over a wide range (approximately 40% - 118% of nominal full capacity), thus staying 'on' for 60% - 100% more hours per day compared to fixed -capacity systems. Experiments in this research examined the performance of 2-ton and 3-ton fixed- and variable-capacity systems and the impacts of system oversizing.
Authors:
 [1] ;  [1] ;  [1]
  1. Building America Partnership for Improved Residential Construction, Cocoa, FL (United States)
Publication Date:
OSTI Identifier:
1220509
Report Number(s):
DOE/GO--102015-4678
7124
DOE Contract Number:
AC36-08GO28308
Resource Type:
Technical Report
Research Org:
Building America Partnership for Improved Residential Construction, Cocoa, FL (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B)
Country of Publication:
United States
Language:
English
Subject:
residential; Residential Buildings; BA-PIRC; Building America; HVAC Sizing; variable capacity heat pump; indoor ductwork; iQ drive; over-sized systems; seasonal energy savings; peak demand energy savings