The ozone (O3) has become an interesting atmospheric pollutant due to the complexity of thetransfer phenomenon to the indoor environment. The study of this phenomenon representedthe main objective of the French national research program PRIMEQUAL PREDIT. Theexperimental work, carried out in eight schools in La Rochelle France, proved that the O3 transfer could be predicted as a function of the outdoor concentration level and the airtightness of the building faade.

The protection of non-smokers against tobacco smoke is a very popular subject. In Japan,the health promotion law was passed in 2002. However, in restaurants and pubs, thepreventive actions against environmental tobacco smoke (ETS) are inadequate and ineffective. This paper presents ETS measurements taken in a restaurant and a computational fluid dynamics (CFD) simulation to reproduce the measurement condition.Several ventilation systems to improve the air quality in non-smoking zones are studied byCFD case studies.

The methods of tracer gas measurement are just well known in the fields of scientific and research. This study gives a summary of the basics and the application ranges of tracer gas measurement.A gas that is not component of the air, normally nitrous oxide (N2O) or sulphur hexafluoride (SF6), is released, distributed through the air flow and detected by an analyser. Tracer gas measurement can be used e.g.

In Finland eight office buildings were investigated as a part of European project HOPE..There were four office buildings with mechanical supply and exhaust air ventilation systemfrom 1970 and 80 without cooling system. The four other buildings had cooling systems;one with traditional central air conditioning system with cooled supply air system, the threeothers had chilled ceiling or beams in each office rooms. Altogether 800 office employeesfilled and returned the questionnaire.

A mathematical model was constructed to simulate time dependent particle concentration inindoor air and to evaluate the exposure of occupants. The model consists of three main parts:(1) a system model to describe the ventilation system and building envelope, (2) a multizone room model, and (3) a dose model. Models (1) and (2) are coded with Neutral Model Format and solved in the IDA simulation environment, and Model (3) in LUDEP (LUng Dose Evaluation Program). Particle deposition mechanisms were formulated with well-known equations.

Thirteen parts of human body’s perspiration in hot and humid environment in summer in Chongqing, located in southwest China, has been tested in the laboratory. We found that human forehead thorax back armpit and haunch were sensitive to the perspiration a

By means of a comparative study of thermal confort methods for a Brazilian reality using among many others authors Voght and Miller Chagas, Givoni, Fanger-Ashrae, Mahoney, Humphreys, Olgyay, methods, this undergoing study tries to show their particularities for the altitude tropical climate of for the city of So Paulo Brazil. This work intends to show the applicability of each method and point out the differences of acclimatation factors for local population. This theme is particularly important in a country with big variations os latitude and macroclimates as Brazil.

With the analysis of the U.S. EPA BASE data from 100 U.S. office buildings, the authors made associations between moisture and ventilation system contamination with lower respiratory and mucous membrane symptoms . For that they used multivariate regression models .

This paper deals with estimated ventilation rates and symptoms in office workers. For that base study the authors used the U.S. EPA data from 100 large U.S. office buildings, and assessed relationships in multivariate models between ventilation/person and lower respiratory and mucous membrane symptoms.
Findings suggest that ventilation rates above current guidelines would reduce symptoms in office workers, and that occupant density may play an unrecognized role in ventilation requirements.

This paper sums up a detailed (CFD) study of the flow around a Computer Simulated Person (CSP) in a displacement ventilated room. The requirements of several computational aspects such as convergence criteria and grid resolution needed for accurate CFD simulations of the personal micro-environment are identified.
Two RANS turbulence models predicted different behavior in both flow structures. But without experimental data the results could not be validated.