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Title: Air Source Heat Pumps for Cold Climate Applications: Recent U. S. R&D Results from IEA HPP Annex 41

Air source heat pumps are easily applied to buildings almost anywhere. They are widespread in milder climate regions but their use in cold regions is hampered due to low efficiency and heating capacity at cold outdoor temperatures. This article describes selected R&D activities aimed at improving their cold weather performance.
 [1] ;  [2] ;  [1]
  1. ORNL
  2. Purdue University, Ray W. Herrick Laboratories
Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Federation of European Heating, Ventilation, and Air Conditioning Associations (REHVA) European HVAC Journal; Journal Volume: 51; Journal Issue: 5
Research Org:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Building Technologies Research and Integration Center (BTRIC)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
Country of Publication:
United States
Air source heat pump; cold climate heat pumps; vapour compression; economizer cycles; parallel compressor cycles; IEA HPP Annex 41