Underhood Air Duct Design to Improve A/C System Performance by Minimizing Hot Air Recirculation

Paper #:
  • 2015-01-1689

Published:
  • 2015-04-14
DOI:
  • 10.4271/2015-01-1689
Citation:
Song, X., Fortier, R., and Sarnia, S., "Underhood Air Duct Design to Improve A/C System Performance by Minimizing Hot Air Recirculation," SAE Int. J. Passeng. Cars - Mech. Syst. 8(1):338-345, 2015, doi:10.4271/2015-01-1689.
Pages:
8
Abstract:
The underhood hot air recirculation greatly impacts A/C system performance at idle and low vehicle speed conditions. The hot air recirculation can raise condenser inlet air temperature in some cases as much as 18°C above ambient, which lowers condenser cooling capacity and increases compressor work. Underhood airflow research in the following study suggests that a properly designed air duct is able to minimize hot air recirculation and improve the Compressors Coefficient of Performance (COP) at idle by 27%. This paper discusses underhood hot air recirculation testing methods, airflow distribution, air duct design concepts, as well as the cross wind and wind tunnel effects. This dedicated air duct design indicates it should improve A/C emissions, which could contribute to meeting the Environmental Protection Agency's (EPA) Green House Gas Emissions Regulations in North America.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2002-10-21
Technical Paper / Journal Article
1961-01-01
Training / Education
2011-04-20
Technical Paper / Journal Article
2012-04-16
Technical Paper / Journal Article
1962-01-01
Technical Paper / Journal Article
1961-01-01
Technical Paper / Journal Article
2005-07-11