Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors

Thumbnail image of item number 1 in: 'Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors'.
Thumbnail image of item number 2 in: 'Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors'.
Thumbnail image of item number 3 in: 'Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors'.
Thumbnail image of item number 4 in: 'Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors'.
Showing 1-4 of 11 pages in this article.

PDF Version Also Available for Download.

Description

Although the rate of outdoor air (OA) ventilation has a substantial influence on building energy consumption and occupant health, the available data indicate the outdoor air ventilation rates are poorly controlled in many buildings. Technologies being marketed for real time measurement of the flow rates of outdoor air into HVAC systems should enable better control of OA ventilation. In laboratory research they have studied the performance of these technologies. Sources of measurement errors identified during conduct of this research include: low air speeds; high spatial variability in air speed and direction; large eddies downstream of outdoor air intake louvers; and ... continued below

Creation Information

Fisk, William J.; Faulkner, David & Sullivan, Douglas P. November 1, 2004.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Authors

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

Although the rate of outdoor air (OA) ventilation has a substantial influence on building energy consumption and occupant health, the available data indicate the outdoor air ventilation rates are poorly controlled in many buildings. Technologies being marketed for real time measurement of the flow rates of outdoor air into HVAC systems should enable better control of OA ventilation. In laboratory research they have studied the performance of these technologies. Sources of measurement errors identified during conduct of this research include: low air speeds; high spatial variability in air speed and direction; large eddies downstream of outdoor air intake louvers; and backwards airflow through a portion of outdoor air dampers. Several suggestions for overcoming these sources of errors were developed including: design and control of the outdoor air intake system to avoid low, hard-to measure, air speeds; use of highly sensitive pressure and velocity sensors; measuring air speeds between blades of louvers, rather than downstream of louvers; smoothing out the airflow between the outdoor air louver and damper through proper louver selection and insertion of components to straighten air flow; and maintaining a pressure drop across the outdoor air damper that exceeds approximately 0.04 IWG (10 Pa).

Source

  • Journal Name: ASHRAE Transactions; Journal Volume: 111; Journal Issue: pt2; Related Information: Journal Publication Date: 2005

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Report No.: LBNL--56604
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 881724
  • Archival Resource Key: ark:/67531/metadc885468

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this article?

Digital Files

When

Dates and time periods associated with this article.

Creation Date

  • November 1, 2004

Added to The UNT Digital Library

  • Sept. 21, 2016, 2:29 a.m.

Description Last Updated

  • Sept. 30, 2016, 12:50 p.m.

Usage Statistics

When was this article last used?

Congratulations! It looks like you are the first person to view this item online.
More Statistics

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors'.
Thumbnail image of item number 2 in: 'Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors'.
Thumbnail image of item number 3 in: 'Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors'.
Thumbnail image of item number 4 in: 'Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Fisk, William J.; Faulkner, David & Sullivan, Douglas P. Technologies for measuring flow rates of outdoor air into HVACsystems: Some causes and suggested cures for measurement errors, article, November 1, 2004; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc885468/: accessed April 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.