Installation Effects on Air Outlet Performance, Part II: Field Air Outlet Throw and Pressure Loss Performance Difference from Ideal

Authors

Brian Landsberger, University of Nevada, Las Vegas
Douglas D. Reynolds, University of Nevada, Las VegasFollow
Zaccary A. Poots, University of Nevada, Las Vegas

Document Type

Conference Proceeding

Publication Date

5-2012

Publication Title

ASHRAE Transactions

Publisher

ASHRAE

Volume

118

Issue

1

First page number:

944

Last page number:

975

Abstract

Building air distribution terminal system designers and system installers require accurate quantitative information on the diffuser throw and pressure loss performance of the installed system to achieve optimum efficiency and levels of human comfort. This research project, covered in three papers, establishes the diffuser baseline performance and then determines the field installation adjustment values. The first paper covers baseline performance. This paper documents the field conditions difference in throw and pressure loss from ideal conditions of six types of ceiling diffusers, each with three different inlet sizes at three different inlet velocities. The third paper covers differences in sound generation from ideal conditions. Full scale laboratory testing of typical field installation variations was completed with variations in damper installation, duct approach angle, duct type, duct vertical height above the diffuser, and close coupling duct installation. A predictive model was developed and used to create a set of look-up tables that can be used to easily predict how the installation configuration would affect diffuser performance compared to published data. The results in this report can be used to determine the corrections for throw and pressure loss for field conditions from baseline results.

Keywords

Air conditioning; Air ducts; Air pressure; Diffusers; Energy consumption; Installation of equipment; Performance evaluation; Quantitative research; Systems design; Ventilation – Design and construction

Disciplines

Architectural Engineering | Engineering | Mechanical Engineering

Language

English

Permissions

Use Find in Your Library, contact the author, or interlibrary loan to garner a copy of the item. Publisher policy does not allow archiving the final published version. If a post-print (author's peer-reviewed manuscript) is allowed and available, or publisher policy changes, the item will be deposited.

Repository Citation

Landsberger, B., Reynolds, D. D., Poots, Z. A. (2012). Installation Effects on Air Outlet Performance, Part II: Field Air Outlet Throw and Pressure Loss Performance Difference from Ideal. ASHRAE Transactions, 118(1), 944-975. ASHRAE.