The 12th AIVC Conference - Air movement and ventilation control within buildings, was held in Ottawa, Canada, 24-27 September 1991.

Contains 88 papers.  

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Vol1: Twenty eight papers from the twelventh AIVC Conference, titles as follows: “The Message of Annex 20: Air Flow Patterns within Buildings”; “Evaluation of Measured & Computer Test Case Results from Annex 20, SubTask 1”; “Models for the Pre
Numerical modeling is performed to predict airflow patterns, thermal comfort, and ventilation air distribution within an open office space.
Jin B. Fang.and Andrew Persily
The computer programs published so far have enabled the calculation of airflows at constant temperatures or of air temperatures at constant airflows.
Klobut K, Tuomaala P, Siren K, Seppanen O
Application of hot wirelfilm ariemometry in room air flows presents difficulties because: (1) the effect of natural convection due to the heated wire beconies significant for low air velocity measurements; (2) the angle sensitivity of a hot wire b
Zhang J, Christianson L, Wu G
Modern inlet devices applied in the field of ventilation of rooms are getting more complex in terms of geometry in order to fulfil the demand for thermal comfort of the occupants in the room and in order to decrease the energy consumption This exp
Skovgaard M, Nielsen P
Combined ventilation and heating systems in floors demand extensive investigations about the heat transfer before they could be installed in residential buildings.
Steimle F, Mengede B, Roben J
A set of diagrams for estimating flow coefficients and exponents in the power law flow equation for cracks are presented.
Kronvall J
Results of 3-D computational fluid dynamic simulations of the air flows, temperature distribution and contaminant remove efficiencies for typical workstation configurations which include the option for localized supply of outdoor air will be prese
Grot R
Inter-zone convection affects the general movements of air in a building and must be evaluated for accurate thermal zones heat and mass balance.
Baranowski A, Wasacz M, Eppe J
This paper presents a new approach to determine the interzonal airflows of a multizone system using tracer gas measurements.
Guitizad S, Jarausch H, Raatschen W
Both infiltration and exfiltration has a predominant influence on the space heating requirements in cold climates. Good predictive design methods are required to estimate the air leakage component in buildings.
Parekh A
A mathematical model has been developed which will facilitate the prediction of infiltration rates within multi-zone buildings.
Field A, Batty W, Probert S
Mechanical systems which use common ducts for combined heating and ventilating functions are becoming popular in the Pacific Northwest (U.S.).
Jackson M
Due to the limitations of computer storage and time the flow boundary conditions at an air inlet device have to be specified for numerical simulations of air flow patterns in rooms.
Ewert M, Renz U, Vogel N, Zeller M
The evaluation of a code can be done by investigating two items: solving the correct equations and solving equations correctly and eficiently. An indoor airflow code VentAirI has been developed and is evaluated here.
Li Y, Fuchs L, Holmberg S
The paper presents an original computer code for the analysis of contaminant diffusion in rooms developed at the Politecnico di Torino and its experimental validation by means of a test facility located at the University of Basilicata (Potenza).
Cardinale N, Fracastoro G, Mantegna M, Nino E
Recent full scale experiments has detected the presence of low Reynolds number effects in the flow in a ventilated room.
Skovgaard M, Nielsen P
Simulation models basing on 2-dimensional finite-difference approach were developed for the steady-state and dynamic analyses of the thermal coupling of leakage airflows and building components.
Virtanen M
A new simple method is proposed here for the experimental singling out of the air flow patterns in a room.
Cannistraro G, Giaconia C, Rizzo G
Numerical modelling is performed to predict air movement, thermal comfort level and contamination distribution within an open office space.
Fang J, Persily A