English

Air leakages can cause a significant energy penalty, inability of the heating system, and failure of the ventilation system – especially in passive houses. However, they can be avoided if given serious consideration in the design phase. The use of adequat

The absolute necessity of air renewal to maintain indoor air quality and thermal comfort in buildingsfaces the major issue of energy consumption reduction and optimisation in building sector. Manystudies carried out so far point out the performances improved thanks to the recourse to ventilationstrategies and control algorithms in the aim of optimising the energy consumption of air renewal, butvery few of them could assess the performances in the particular case of large buildings despite thepotential energy gains it represents considering the great volume and huge air flow rates induced.

Being the largest energy consumer, building sector represents a major stake for the actualenvironmental concerns. So far, building thermal comfort standards are based on static models thatdont account for the interaction between occupants and their living places. The adaptive approach of the thermal comfort has the advantage to be more comprehensive and realistic, and its application would result in energy saving in buildings. Recently, an Adaptive Control Algorithm ACA and an Adaptive Comfort Standard ACS have been developed on the adaptive approach.

Dynamic analysis is very useful to obtain thermal properties of building components. However different methodologies can be applied, and several software tools based on these methodologies are available which application requires certain degree of experience. The main differences between methodologies are the numerical procedure and the model assumed to estimate the required parameters. Different approaches can lead to different and even wrong estimations of the parameters.

Responsive Building Elements (RBE), as defined in International Energy Agency - Annex 44,are building construction components which are actively used for transfer and storage ofheat, light, water and air. These construction elements (like floors, walls, roofs, foundationetc.) are logically and rationally combined and integrated with building service functions suchas heating, cooling, ventilation and lighting.

This paper presents results of an evaluation of workplace occupant satisfaction in 16 state ofthe art office buildings of a variety of sizes and energy concepts in Germany. Some of thebuildings feature very low total energy consumption as well as passive cooling strategies. In thequestionnaire, all relevant aspects concerning occupant satisfaction of indoor environments areaddressed.

Airflow characteristics in ventilated and air-conditioned spaces play an important role toattain comfort and hygiene conditions. This paper utilizes a commercial 3D Computational FluidDynamics (CFD) model, FLUENT, to assess the airflow characteristics in ventilated and airconditioned archaeological tombs of Pharonic Kings in the Valley of the Kings in Luxor, Egypt.

This paper analyzes the existing ventilation flow pattern in a hospital room with two beds.The room is divided by curtains and partition walls, which has advantages for its use and medicalassistance, but is an important obstacle as far as ventilation is concerned.

The energy performance of a building is closely related to the expected or achieved indoorenvironmental quality. The European Directive 2002/91/EC about energy performance of buildingssuggests that beside the energy class, also the relative IEQ level should be expressed.

The present study treats a way to realize a local ventilation installation that collects the airlet out by a flat source. The experimental installation will be presented as well as the methodology and the apparatus with the help of the experimental measures where taken. In the end there are presented also the results obtained and their analysis.In this paper research was done on the influence of the constructive parameters of the proposedinstallation on its efficiency. The statistic methods of the experiment planning were used to resolve this problem.