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Title: Review of air flow measurement techniques

Review of air flow measurement techniques Airflow measurement techniques are necessary to determine the most basic of indoor air quality questions: ''Is there enough fresh air to provide a healthy environment for the occupants of the building?'' This paper outlines airflow measurement techniques, but it does not make recommendations for techniques that should be used. The airflows that will be discussed are those within a room or zone, those between rooms or zones, such as through doorways (open or closed) or passive vents, those between the building and outdoors, and those through mechanical air distribution systems. Techniques that are highlighted include particle streak velocimetry, hot wire anemometry, fan pressurization (measuring flow at a given pressure), tracer gas, acoustic methods for leak size determination, the Delta Q test to determine duct leakage flows, and flow hood measurements. Because tracer gas techniques are widely used to measure airflow, this topic is broken down into sections as follows: decay, pulse injection, constant injection, constant concentration, passive sampling, and single and multiple gas measurements for multiple zones.
Authors:
Publication Date:
OSTI Identifier:809884
Report Number(s):LBNL--49747
R&D Project: 474401; B& R EC0903000; TRN: US200308%%292
DOE Contract Number:AC03-76SF00098
Resource Type:Technical Report
Data Type:
Resource Relation:Other Information: PBD: 1 Dec 2002
Research Org:Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
Sponsoring Org:USDOE Assistant Secretary for Energy Efficiency and Renewable Energy. Building Technologies Program (US)
Country of Publication:United States
Language:English
Subject: 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; ACOUSTICS; AIR; AIR FLOW; AIR QUALITY; BLOWERS; DECAY; DISTRIBUTION; DUCTS; OCCUPANTS; PRESSURIZATION; RECOMMENDATIONS; SAMPLING