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Pressure loss coefficient measurements of two close-coupled HVAC elbows.

Author(s) : MYLARAM N. K., IDEM S.

Type of article: Article

Summary

An experimental programme was initiated to determine the friction factor in a straight duct and the loss coefficient of either a single elbow or two elbows placed in close proximity. The tests were performed in accordance with ANSI/ASHRAE Standard 120-1999. Loss coefficients C were measured for six kinds of single elbows. Likewise, identical pairs of elbows were considered in the close-coupled elbow experiments. For long separation lengths, the loss coefficient for two close-coupled elbows approached to within approximately 10% of the value of 2*C for a single elbow, for most cases considered in this study. The single-elbow data were also compared with those published in the 2002 ASHRAE Duct Fitting Database.

Details

  • Original title: Pressure loss coefficient measurements of two close-coupled HVAC elbows.
  • Record ID : 2005-2747
  • Languages: English
  • Source: HVAC&R Research - vol. 11 - n. 1
  • Publication date: 2005/01

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