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
12th AIVC Conference - Ottawa, Canada - 24-27 September 1991
The 12th AIVC Conference - Air movement and ventilation control within buildings, was held in Ottawa, Canada, 24-27 September 1991.
Contains 88 papers.
12th AIVC Conference "Air Movement and Ventilation Control within Buildings" (Book of Proceedings) | 1991 | English
Numerical modeling is performed to predict airflow patterns, thermal comfort, and ventilation air distribution within an open office space.
Simultaneous calculation of airflows, temperatures and contaminant concentrations in multi-zone buildings. | 1991 | English
The computer programs published so far have enabled the calculation of airflows at constant temperatures or of air temperatures at constant airflows.
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
Modelling complex inlet geometries in CFD - applied to air flow in ventilated rooms. | 1991 | English
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
Investigation of a combined ventilation and heating system for residential buildings. | 1991 | English
Combined ventilation and heating systems in floors demand extensive investigations about the heat transfer before they could be installed in residential buildings.
A set of diagrams for estimating flow coefficients and exponents in the power law flow equation for cracks are presented.
Modelling of airflows, temperatures and contaminant levels for localized ventilation systems. | 1991 | English
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
Experimental investigation of convective couplings across various doorways under horizontal temperature gradients. | 1991 | English
Inter-zone convection affects the general movements of air in a building and must be evaluated for accurate thermal zones heat and mass balance.
A new approach for the numerical identification of interzonal airflows from tracer gas measurements. | 1991 | English
This paper presents a new approach to determine the interzonal airflows of a multizone system using tracer gas measurements.
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.
A mathematical model has been developed which will facilitate the prediction of infiltration rates within multi-zone buildings.
Integrated forced-air heating and ventilation systems: evaluation and design considerations. | 1991 | English
Mechanical systems which use common ducts for combined heating and ventilating functions are becoming popular in the Pacific Northwest (U.S.).
Definition of the flow parameters at the room inlet device - measurements and calculations. | 1991 | English
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.
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.
Theoretical and experimental analysis of different ventilation strategies in a test room. | 1991 | English
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).
Numerical investigation of transient flow over a backward facing step using a low Reynolds number k-e model. | 1991 | English
Recent full scale experiments has detected the presence of low Reynolds number effects in the flow in a ventilated room.
Thermal coupling of leakage air flows and heating load in building components and buildings. | 1991 | English
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.
Using thermofoil heaters for the experimental determination of the air flow patterns in a room. | 1991 | English
A new simple method is proposed here for the experimental singling out of the air flow patterns in a room.
Numerical prediction of airflow patterns and ventilation effectiveness in an open office environment. | 1991 | English
Numerical modelling is performed to predict air movement, thermal comfort level and contamination distribution within an open office space.