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ASHRAE Approves Research to Determine Ventilation Rates
Aug 6, 2004
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The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) approved funding totaling U.S. $759,073 for seven research projects in the areas of design tools, and indoor air quality, comfort, and health at its 2004 Annual Meeting.

Among them is 1276-RP, Multiple Space Effects on Ventilation System Efficiency in Standard 62. ANSI/ASHRAE Standard 62-2001, Ventilation for Acceptable Air Quality, contains an equation used to adjust an HVAC system's outdoor air intake requirement, accounting for variations in supply airflow rates and ventilation needs among the spaces it serves.

The adjustment tends to increase outdoor requirements above the sum-of-zone outdoor air requirements by 10 to 200 percent depending upon the population diversity among the spaces served and the nature of the HVAC system design, according to Steven Taylor, a member of ASHRAE's Technical Committee (TC) 5.12, Ventilation Requirements and Infiltration, which sponsored the project.

"Due in part to this significant impact on ventilation rates and because of its complexity, the equation is controversial and many users of the standard ignore it," Mr. Taylor said.

The research will improve the standard and model building codes that are based on the standard by providing direction for how to correctly determine ventilation rates for systems serving multiple spaces. The principal investigator of the project is Grenville Yuill, Ph.D., P.Eng., Building Solutions Inc., Lincoln, NE, U.S. The project is expected to take a year to complete at a cost of $98,050.

Other projects approved for funding include the following:

Design Tools

  • Improving Load Calculations for Fenestrations with Shading Devices, 1311-RP, John Wright, University of Waterloo, Ontario, Canada, 30 months, $145,283, sponsored by TC 4.1, Load Calculation Data and Procedures.
  • The Quantification of Duct Rumble Noise Resulting From Aerodynamic System Effects at the Discharge of a Centrifugal Fan, 1219-RP, Adin Mann III, Iowa State University, Ames, IA, U.S., 2 years, $118,656, TC 2.6, Sound and Vibration Control.
  • Evaluation of Building Thermal Mass Savings, 1313-TRP, Gregor Henze, Ph.D., P.E., University of Nebraska-Lincoln, Lincoln, NE, 18 months, $89,101, TC 7.4, Building Operation Dynamics.
  • Development of Solar Radiation Models for Tropical Locations, 1309-RP, Moncef Krarti, Ph.D., P.E., MK Associates, Boulder, CO, U.S, 1 year, $77,544, TC 4.2, Weather Information.

    Indoor Air Quality, Comfort, and Health

  • Reflection of Airborne Noise at Duct Terminations, 1314-RP, Kenneth Cunefare, Georgia Institute of Technology, Atlanta, GA, U.S., 2 years, $120,467, TC 2.6, Sound Vibration and Control.
  • Identification, Classification and Correlation of Ultrafine Indoor Airborne Particulate Matter and Contrasted to Outdoor Values, 1281-RP, Shelly Miller, University of Colorado, 2 years, $109,972, TC 2.4, Particulate Air Contaminants and Gas Contaminant Removal Equipment.

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