Experimental results of transcritical CO 2 heat pump for residential application

This paper describes experiments comparing a commercially available R410A heat pump and prototype R744 (carbon dioxide) system in heating mode. The R744 system utilizes aluminum microchannel heat exchangers and a prototype semi-hermetic compressor. System performance is compared for two configuratio...

Full description

Saved in:
Bibliographic Details
Published in:Energy (Oxford) 2003-08, Vol.28 (10), p.1005-1019
Main Authors: Richter, M.R., Song, S.M., Yin, J.M., Kim, M.H., Bullard, C.W., Hrnjak, P.S.
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This paper describes experiments comparing a commercially available R410A heat pump and prototype R744 (carbon dioxide) system in heating mode. The R744 system utilizes aluminum microchannel heat exchangers and a prototype semi-hermetic compressor. System performance is compared for two configurations: first, when the R744 compressor speed is set to match the baseline system’s heating capacity at 8.2 °C outdoors and 21.1 °C indoors; and second, when the air conditioning capacity is matched at 35 °C outdoors and 26.5 °C indoors. The R744 system operates with a slightly lower heating COP, but its higher capacity at lower outdoor temperatures reduces the need for less efficient supplementary heating capacity.
ISSN:0360-5442
DOI:10.1016/S0360-5442(03)00065-3