English

In that paper, the efficiency of ultraviolet germicidal irridiation (UVGI) to inactivate airborne fungal spores and bacterial vegetative cells has been evaluated under three configurations : intrinsic, upper-room air and in-duct. Experiments were carried out in a pilot-scale chamber with 4 corner UV lamps, in a full-scale room fitted with a UVGI system, and in the supply air duct of a heating ventilation and air-conditioning (HVAC) system. Results are presented.

A visual ventilation guiding device for instant estimation of indoor air quality has been developed for that study. The VVGD converts the signals of a gas sensor and a temperature and humidity sensor into an optical recommendation of how to act for the users (open or close the window). The device has been tested and calibrated in dwellings, flats and schools. Results and conclusions are presented.

This paper presents the EULEB project whose aim is to supply information to architects and engineers throughout Europe and beyond it. A CD containing information on architecture, energy consumption and economical efficiency as well as comfort of innovative buildings selected among educational buildings, office buildings and leisure facilities in nine European countries, will be produced. The lack of information on low energy architecture will be eliminated along with the prejudices many people have against it.

This article is part of the VENT DIS.COURSE project funded by the Intelligent Energy Europe programme whose aim was to improve energy efficiency in buildings by directly transferring existing knowledge. This paper discusses the relationship between design, commissioning and control of building ventilation systems to achieve an optimal balance of comfort and energy performance. Methodologies for short term studies are presented too.

This article is part of the VENT DIS.COURSE project funded by the Intelligent Energy Europe programme whose aim was to improve energy efficiency in buildings by directly transferring existing knowledge. This paper presents a brief summary of application of natural ventilation in urban areas to engineers. It focuses on the understanding of the energy impact of ventilation . It provides a simple guidance on calculating ventilation related energy losses for both heating and cooling conditions.

For that study, the mass of indoor air particulate matter (PM10 and PM2.5) in five elementary schools in Istambul has been determined along with its elemental concentration. The results and conclusions are presented.

For that study, the authors have performed a numerical simulation of the flow field for a design of contra-rotating axial flow fans (CRAFF). The performance prediction was then validated by test data.A guideline for shaft power matching is presented too. Finally a comparison of the blade pitch angles obtained from the guideline with those obtained form the numerical simulation have been carried out for six designs of CRAFF. The deviations from the optimum obtained by CFD are within 2. That means the guideline is correct and can save a lot of time and money.

For that study, the performance of two personalized ventilation systems supplying air at the breathing zone have been tested in a full-scale test room in conjunction with underfloor ventilation.Breathing thermal manikins were used for the simulation of occupants. Compared to underfloor ventilation alone, personalized and underfloor ventilation provided excellent protection from any pollution for the occupants.

The new REHVA guidebook is presented in this paper. Written by an international group of experts. The researchers, engineers and practitioners advise how to quantify the effects of indoor environment on office work and how to integrate productivity in life-cycle-cost analysis of building services. The main purpose of their guidebook is to increase the awareness of building owners and practitioners to indoor environmental quality and its importance for office work and to convince them that large profits could be obtained with fairly small investments.

The aim of that paper was to evaluate the impact of different filter types on the performance of three typical packaged air conditioners under clean and fouled conditions. Simulated models have been developed, the fouling impact on equipment capacity and enery efficient ratio (EER) were analyzed along with dust transmission. Then conclusions and recommendations are listed.