The Air Infiltration Centre's program of model validation.

Describes a programme undertaken by the AIC to validate mathematical models of air infiltration. Uses experimental data to assess the reliability and full range of applicability of air infiltration models, and to identify key parameters that

Results of recent weatherization retrofit projects.

Descibes tests conducted by the Pacific Gas and Electric (PGE) and the Bonneville Power Administration (BPA) to evaluate cost effectiveness of certain retrofits. 20 houses in Walnut Creek CA underwent an air infiltration reduction program, simi

Methods for estimating potential energy saving at a national level based on calculations for existing buildings.

Discusses the second natural energy conservation program in Sweden implemented in 1980. This sets out to estimate the national energy saving potential, with special reference to existing housing. A refined method for calculation of energy sa

Results of the Bonneville Power Administration weatherization and tightening projects at the Midway Substation residential community.

Describes a project carried out by the Bonneville Power Administration where 18 houses at its Midway substation in central Washington were retrofitted and the results monitored for a 3 year period. The houses were divided into 3 groups. During

Generalized two-region model for infiltration studies.

Uses a two-region model to predict infiltration, to take into account non-ideal mixing of tracer gas in a building. Considers versions of this model:< 1. Fluid flows between the 2 regions and the environment in any manner provided steady state and mass balance are maintained.< 2. There is limited interchange between the regions< 3 Air flows into the first region and out of the second with (unbalanced) interchange between the two.< 4. The second region is a "dead-water" zone, which is not directly connected with the outside.<5.

Comparison of measurements on the CAARC standard tall building model in simulated model wind flows.

Compares measurements of surface pressure and response on the CAARC standard tall building model, made at 6 establishments. In general, the degree of accuracy is good and mostly within the scatter of reasonable experimental accuracy. Observes small trends in respect of pressure measurements which could be attributed to differences in the approaching longitudinal velocity spectrum and to the requirement for blockage corrections. Finds no obvious trends in the dynamic response measurements, where the majority of the data compares within +-15%.

Indoor air pollution -characterization, prediction and control.

Explores the health implications, external and internal contributions, and the measurement of indoor air pollution including such subjects as sampling and analysis, calibration, time scale and interferences. Outlines the current status of prediction techniques, including areas such as one-compartment models, infiltration estimation, and empirical models. Summarizes the most common control methods. Examines, in detail, the application of modelling techniques to several typical indoor settings, for example, a restaurant, kitchen or a conference room with smokers.

Computer program for calculating natural ventilation. Programmi per il calcolo della ventilazione naturale.

In the calculation of natural ventilation systems there is a lot of data which is not dependent on the ambient weather conditions. Data calculated by project engineers include geometrical size of the building; effective vertical distance between inlets and outlets; indoor loads/heat, moisture, fouling gases; interior climate requirements, relative humidity, density of air etc.Some of these factors are not changeable after the completion of the building, but there are some which could or need to be changed.

Methods for control of indoor air quality.

Identifies alternative methods available to control indoor air pollutant exposures. Describes the performance characteristics of ventilation systems and of air cleaning devices used in mixed modes for ventilation of occupied spaces. Reviews models for predicting effectiveness of several alternative modes, with field trial validation results cited where available. Briefly reviews previous confined-space studies as points of departure for consideration of necessary air quality, ventilation and air cleaning.

The effects of ventilation on residential air pollution due to emissions from a gas-fired range.

Shows the usefulness of a model for extrapolating environmental chamber results on pollutant emissions from combustion appliances to determine indoor pollutant concentrations in actual residences. Investigates the effects of infiltration, whole-house ventilation, and spot ventilation on pollutant levels. Results show that a range hood is the most effective means of removing pollutants emitted from a gas-fired range; removal rates vary from 60%-87%.

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