LoginPresents the air leakage characteristics obtained from measurements of nine brick and concrete block walls in the DBR/NRC huts at Ottawa and Saskatoon.
Bibliographic database Airbase
AIRBASE is the Bibliographic Database of the AIVC. It contains publications and abstracts of articles related to energy efficient ventilation. Where possible, sufficient detail is supplied in the bibliographic details for users to trace and order the material via their own libraries. Topics include: ventilation strategies, design and retrofit methods, calculation techniques, standards and regulations, measurement methods, indoor air quality and energy implications etc. Entries are based on articles and reports published in journals, internal publications and research reports, produced both by university departments and by building research institutions throughout the world. AIRBASE has grown and evolved over many years (1979 to present day, over 22000 references and 16000 documents available online). For most of the references, the full document is also available online.
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Although there has been an increasing use of wind-tunnel tests on models to examine the structure of wind around buildings, there has been surprisingly little research into the correlation between the results of such studies andthe wind pattern ar
Analyses wind pressure records, taken during 5 different windstorms on 2 levels in a 400ft (122m) high office building in downtown Montreal March 1964 pressure fluctuations on an actual building.
For simplicity's sake the determination method outlined in previous issues of this article did not include the air infiltration through cracks.
Assuming higher than probable cd values for crack length openings on calculation of infiltration rates results in excessive allowances for heating and cooling capacity.
Discusses control from outdoors and gives a formula for the heat required to maintain indoor design temperatures. Outlines the twofold effect of wind, i.e.
After discussing briefly the principles of natural ventilation, goes on to describe tracer gas techniques, air movement measurements, and various model techniques including analogues.
Describes tests of air leakage performed on both prime windows and storm windows, separately and in tandem at wind velocities of up to 30.m.p.h. All types of windows were tested and upper and lower ranges for infiltration found.
States that to calculate the ventilation characteristics of a building it is necessary to know the shape, planning and dimensions of the building, air leakage characteristics of all elements of the building, aerodynamic coefficients, wind velocity
States heat load on buildings due to wind is dependent on the shape of building, wind direction and wind speed. Gives theoretical calculation for the heat loss due to wind based ongerman standard DIN 4701.
Describes three test high-rise buildings and the pressure measurements made on buildings.
Gives the results of an analytical study of the distribution of pressure differences caused by chimney action in buildings.
Discusses problem of assessing wind loads on buildings. Describes general properties of the wind and suggests wind can be described by its mean velocity with superimposed gusts. Suggests averaging period of 10-15 minutes for the mean velocity.
Discusses use of long boundary layer wind tunnel to produce a more realistic model of natural wind than that obtained in conventional aeronautical wind tunnel.
Reports wind measurements made on a multi-storey building. Gives contours of overall pressure coefficients and wind velocity profiles.
Reports measurement of wind pressures on Royex House, a multi-storey building in London. Reports that suction loads on cladding are more severe than had been indicated by wind tunnel tests.
Discusses mechanisms for radon liberation in dwellings. Mentions survey which found radon concentrations exceeding the maximum permissable concentration of 3 x 10^-12 curies in 13 of the 65 dwellings.
This paper describes an original investigation of a new flowmeter and a method of balancing of airflow circuits in low pressure ventilating systems. The flowmeter is simple and robust in its construction, imposes virtually no resistance to
For proper control of the ventilation in a building, it is necessary to know the factors involved. These include (1) the climate, including temperature, wind direction, and wind velocity, (2) the building performance, (the interconnections b
Gives survey of humidity in Canadian homes indicating that humidity depends primarily on outside conditions but is influenced by the ventilation habits of the occupants and moisture storage by hygroscopic material.