English

In order to evaluate the impact of potential interventions on indoor contaminant concentrations and occupant exposures, a simulation study was conducted using the multi-zone IAQ model CONTAM.This paper describes the building model and eight interventions : upgrading gas stove, operation of gas oven to heat home, removal of unvented space heater, enhanced particle air cleaner, installation of air-conditioner, kitchen and bathroom exhaust fans, mechanical whole-house ventilation, tightening the envelope.

Few studies have addressed the issue of how to make improvements to avoid Taiwanese housewives exposing to excessive quantities of air pollutants when cooking. This study investigated the design and experimental assessment of side exhaust systems in afull-scale model kitchen including exhaust equipment and the measuring apparatus. The aim was to understand how different exhaust configurations could affect the overall exhaust performance.

A well adjusted ventilation is useful to save heating energy with regard to hygienic aspects or aspects of building materials maintenance.For that study, a simple device was developed with the VVGD, it aims at helping housing users to perform a sensible ventilation behavior based on reliable sensor data. During the field test, a total of 35 VVGDs were installed with 19 test users.The sensors output their signals to a display unit similar to a traffic light.

In this emergency ventilation investigation, the aim of ventilation is to minimize the influence of contaminative gas upon the occupants.A two-dimensional Cellular Automata model is used to calculate the occupants developing distribution during an emergency event. With the numerical simulation tool, the negative influence on every person has been calculated.

Tracer gases and its monitoring method were studied in measurement of ventilation rate by use ofconcentration-decay method. Five kinds of gases (sulfur hexafluoride, nitrous oxide, carbon monoxide, carbon dioxide and isobutene) were compared.In this study isobutene was used as law-environmental-loading tracer gas. Its concentration was monitored with a PID (photo-ionizing detector) monitor.To fix the procedures and conditions for measurement of ventilation rate, the performance characteristics of this system were examined.

In this paper, applied the SARS particle thresholds, the distribution of SARS virus particles in rooms with three different ventilation types and two different virus source locations are compared. And the SARS particle concentration near the sickroom is simulated numerically with two different positions of the exhaust chimney.The conclusions that have been drawn can be used to design the ventilation system of the SARS sickroom for protection.

This paper investigates the feasibility of reducing the outdoor air ventilation requirements by selectinglow-emission materials, while still maintaining acceptable IAQ, for a residential building. The method used was to apply tools such as a computerized database of material emissions and its accompanying IAQ simulation model (MEDB-IAQ).A real two-storey R-2000 house was chosen as the simulation reference case to serve as the basis for comparisons with alternative material selections.

In Korea, almost all flats have the structure of concrete that is cast in forms and ties are used tofix forms. Tie holes are usually filled with cement mortar. Instead of filling the holes in the balcony, they might be used as trickle ventilators. If they do not satisfy completely the ventilation requirement, other ventilators will be needed. The objective of this study is to assess the ventilation performance of these natural ventilators.

Experiments were conducted in the mockup of a Boeing aircraft cabin section located in the BESS(Bioenvironmental Engineering Structure Systems) lab at the University of Illinois at Urbana-Champaign. The objectives of this experiment study included characterizing air distribution using VPTV (velometric particle tracking velocimetry) technique and determining local mean age of air in the ventilated airspaces and ventilation effectiveness using a tracer gas method to evaluate the performance of ventilation systems in removing airborne pollutants.

The paper explores whether replacing old windows, in a significant proportion of UK dwellings, could reduce air change rates below recommended levels unless additional controllable ventilation is installed at the same time as new windows.For that study, the authors have identified a sample of dwellings that were to have complete window replacement, then carried out fan pressurisation measurements before and after replacement in order to assess the impact on the UK building stock as a whole.