ventilation

Ships are very demanding on the ventilation systems that need to be installed. The reasons forthis are manifold. The following paper will address the problems around the ventilation layout for a typical RoRo-Ferry and will show how CFD can help the designers to optimize the system. One new area of interest is the simulation of fire to optimize the fire suppression systems in engine rooms of RORO vessels.

This paper sums up the evolution of the AIVC technical programme over the past 25 years with its main subjects of interest and its main productions (guides, handbooks, technical notes, database, literature reviews).The communication between research communities and AIVC is also evoked along with its future developments.

From AIC to AIVC changes have occured with increased awareness of the role of ventilation. AIVC will have to continuously evaluate changes in society and technology in order to stay attractive and useful for its target groups. This paper comments the scope of the annex 5, the type of activities, the global environment in which annex 5 is working, and the dissemination approach for the diffusion of information on AIVC website.

Ventilation has two functions : a universal role to assure air renovation and bring fresh air into spaces and the role of energy carrier for heating or cooling. In so far as air is always needed, it was used for both functions. But some dysfunctions occured whenever the energy for comfort overwehelms the ventilation for all, all the time.
Though progress in ventilation knowledge has been extraordinary during the last century, there is a growing concern about it. A revision of the concept of comfort must be done along with a better understanding of what it allows in practice.

Microperforated sound absorbers have been successfully implemented in suspended ceilings, transparent panel absorbers or other applications. That principle of microperforation has been introduced to further engineering areas such as duct systems where the air flows through the micorperforation. So along with the ventilation aspects, the sound absorption effects need to be taken into account. In that aim, the theory of a microperforated absorber was extended by the effects due to airflow through the microperforation.

The aim of that study is to produce guidance in adequate ventilation in new domestic buildings. The paper gives a description of the development and application of a method for measuring the mean ventilation rate in occupied homes with the measurement of indoor air pollutants. Results are presented.

Local control of ventilation in large buildings is considered to be a main issue in energy savings regarding the huge energy losses that are usually induced by such large volumes. An efficient ventilation system and the development of local control ventilation strategies could prevent large buildings from having an unsuited or overvalued ventilation and reduce significantly the energy consumption.

This paper sums up the knowledge on good and bad effects of ventilation on health and other human responses. The focus is on working environment in offices and residential buildings.

This paper presents aspects of an office renovation project of the Social Insurance Institute (SII), the largest Social Security Organization in Greece. The project refers to small and larger SII office buildings, including various stages of intervention, ranging from the construction of new buildings, to renovation of existing buildings. Construction and electro-mechanical studies for each building were carried out in order to implement the appropriate and feasible actions.

In this paper the effectiveness of retrofitting strategies in a sunspace attached to a one-storey building has been investigated. Natural and hybrid ventilation, air-tight glass partitions, awnings and increased thermal mass retrofitting scenarios were implemented, mainly for the Greek climate. Window openings and sensor-controlled fans were used to create a controllable and secure environment. Combined ventilation and thermal simulation were applied, taking into account all the related physical phenomena, such as ventilation, infiltration and solar radiation.