English

This paper aimed at presenting the application of data-based mechanistic (DBM) modelling technique to control the temperature dynamics in a forced ventilated room. The laboratory test chamber is described along with the experiments conducted to examine the effect of the ventilation rate on the spatial temperature homogeneity.

For the analysis of the variation of ventilation performance with the intensity and the location of indoor momentum source, a numerical study was conducted. Simulations were performed in the room with different occupancies and methods of air room diffusion in order to control the indoor air quality. Model descriptions, research methods and results are presented.

For that study a CFD model has been developed. Its aim is to propose a design or an improvement plan of an intake and exhaust system and air-conditioning facility for a kitchen ventilation system. Couipled simulations of convection and radiation allowed the detailed analysis of airflow patterns. The conclusions drawn from the results of simulations are presented.

This numerical study demonstrates the importance of buoyancy on the jet distribution in a ventilated room. The flow parameters are thus strongly affected in the occupied zone. 25 cases of diffuser locations were studied . For each simulation done in two-dimensions on a cylindrical computational grid, a critical Archimedes number was found at which the jet failed to attach to the ceiling.A relationship between the separation distance and the Archimedes number was shown.

In that study, a method to predict conditions in floor heating type living room by CFD is proposed. Full size model experiments were carried out to obtain measured data. Then simulation based on CFD aimed at reproducing the experimental conditions. Case studies based on CFD were then performed . For each condition a possible cold draft risk was evaluated .

A CFD simulation software to investigate the human thermal comfort in ventilated tombs of the Valley of Kings was used for that study. Its main objective is to assess the airflow characteristics, thermal pattern and indoor air quality in the different tomb ventilation configurations to know the basic flow characteristics. A full description of the parametric case studies is presented in this paper.

Basic steady-state energy and exergy analyses for residential ventilation with and without heat recovery from ventilation air are presented in this paper. Factors influencing residential ventilation from an exergy perspective are discussed and dimensionless numbers are proposed to express the energy savings potential of a DC fan and a heat recovery unit (HRU) in dwelling ventilation system.The results of that study show that ventilation with heat recovery reduces the heat demand in terms of energy and exergy.

A mathematical model is built to evaluate the energy saving potential of a new three rotary wheels fresh air handling unit (TRWFAHU). The energy saving potential of the proposed AHU is numerically analyzed and compared with conventional fresh air handling unit . The TRWFAHU can increase fresh air rate by 10 % without increasing energy consumption.

The new headquarters for Danish broadcasting company are planned for low energy use and minimization of CO2 emissions. Alternative energy sources are high priorities to achieve a healthy building with a pleasant indoor climate in terms of light, acoustics, thermal conditions and air quality. The combination of natural cooling and groundwater cooling with seasonal underground cold storage will save an estjmated 75 % of energy.

Night ventilation is a passive cooling technique that can reduce the cooling loads and energy requirements. In this paper , the use of a Multi Objective Genetic Algorithm optimization (MOGA) performed on a climatized part of a building with night ventilation proved to be a helpful tool for the analysis of problems where conflicting objectives have to be optimized simultaneously..