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.

Energy Performance Policy for the Building sector has been recommended by the European Commission in so far it can help in introducing new techniques that will influence the indoor climate. In this paper, the results of an empirical study on database of energy performance calculations from 1996 up to 2001 are used to evaluate the influence of the energy performance policy on the indoor climate in the Netherlands, for example a remarkable shift in ventilation techniques occured.

The aim of that study was to investigate the energy consumption at different gradients in a field environment chamber in Singapore. The results of the experiment are presented along with the authors ' main conclusions.

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..

Field studies have been carried out in an existing kitchen to investigate the effects of gas stoves on indoor environment. Laboratory measurements were carried out according a similar process : Determination of filtration, Emission rate measuring, Determination of pollution loads, Thermal comfort measurements, Evaluation of local exhaust system. Results and conclusions are presented