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Document ID (ISN)33539
CIS number 80-981
ISSN - Serial title 0033-1716 - Protection
Year 1979
Convention or series no.
Author(s) Gill F.S.
Title The measurement of airflow in ducted ventilation systems.
Bibliographic information Mar. 1979, Vol.16, No.3, p.6-11. Illus.
Abstract Preventive maintenance aspects of ensuring that ventilation systems continue to function properly: checking whether the air flow rate continues to meet the parameters for which the system was designed; reasons for impaired performance (dirt on fan blades, blocked filters, corroded dampers, leaky ducting); multi-branched systems getting out of balance, some branches handling more or less air than intended; measurement of pressure differences across certain parts of the system; use of coloured smoke tracers to make airflow visible and observe flow patterns outside the system; measurement of air velocities at various points in the system. Techniques and instruments used (Pitot static tube; glass U-tube; diaphragm gauge; rotating-vane, hot-wire, thermocouple and thermister anemometers); general guidelines.
Descriptors (primary) ducts; airflow measurement; preventive maintenance; ventilation systems
Descriptors (secondary) velocity of flow; flowrate measurement; fans
Document type D - Periodical articles
Subject(s) Heating, ventilation and climate
Broad subject area(s)
Browse category(ies) Compressed gases and pressure vessels
Ventilation