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Document ID (ISN)41459
CIS number 84-385
ISSN - Serial title 0509-6510 - Prace Centralnego instytutu ochrony pracy
Year 1983
Convention or series no.
Author(s) Wasiluk W., Jaskˇlski M.
Title Studies on a ductless ventilation system
Original title Prace badawcze nad bezprzewodowym systemem wentylacji [in Polish]
Bibliographic information 1983, Vol.33, No.117, p.81-99. Illus. 4 ref.
Abstract The airflow regimes in ductless ventilation systems were analysed in model studies with chambers 9m long, 1.8m wide and 1-2m high. Data were obtained with 3 models: a positive-pressure system with regularly spaced inlet vents, a negative-pressure system in which an array of small fans at the top of the chamber swept air toward an exhaust at one end, and a similar negative-pressure system with perforated baffles in the chamber. Data from the negative-pressure models were used to design full-sized systems for a 2-bay assembly room (48x18x5m) in a gas-meter plant and for a 4-bay arc welding shop (10x24x5m). Equations developed in the model studies and refined in the field trials enabled the size and placement of the fans in the welding shop to be calculated from the known rate of generation of welding fumes and the MAC for welding fumes (which determines the necessary rate of turnover of the workplace air).
Descriptors (primary) aerodynamics; ventilation design; mechanical ventilation; welding fumes
Descriptors (secondary) mathematical models; tests on models
Document type D - Periodical articles
Subject(s) Heating, ventilation and climate
Broad subject area(s)
Browse category(ies) Ventilation