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.
Airflow characteristics in the air-conditioned surgical operating theatres play an importantrole to obtain comfort and hygiene conditions. This paper utilizes a full 3D Computational FluidDynamics (CFD) model to assess the airflow characteristics in surgical operating rooms. The aim ofthis work is to investigate the flow regimes and air temperature distributions in operating theatres toarrive at a better design leading to improved comfort with the optimal indoor air quality (IAQ).
The severe summer climate, the actual trends in building design (imported from northernlatitudes) and the rising living standard in Mediterranean countries have promoted a massive andunnecessary use of air conditioning systems. This creates considerable problems at peak load times,increasing the cost of electricity and disrupting the energy balance in those countries.
A high quality indoor environment, essential for occupant’s health, comfort and productivity, is the need of the present world. Room air simulations are being carried out to predict the airflow inside the room. The airflow properties just at the exit of
To gain access to information on energy use in office buildings, the German Federal Ministry forEconomy launched an intensive research and demonstration programme in 1995. In advance of theEU energy performance directive a limited primary energy coefficient of about 100 kWh m-2a-1 as agoal for the complete building services technology was postulated (HVAC + lighting) for alldemonstration buildings. A further condition was that active cooling be avoided.
The idea proposed in this paper is to control the HVAC equipment with predicting the heating/cooling loads and indoor conditions by computational simulation according to the target, such as energy consumption, energy cost, CO2 generation and indoor thermal comfort. The simulation inputs is given by the measurement results, e.g. weather conditions, indoor temperature and humidity on the spot. The developed system controls HVAC system by using the real-time simulation, and investigates the performance of this system.
The aim of this work is to study the influence of global heat transfer coefficient (Utot en W/m2.K) of the opaque walls (walls and roofs) and of the glazed walls (bays) on the annual consumption of heating, cooling and overall consumption energy. We analyze the number of hours of heating and cooling under operation with partial load and full load. Profiles of indoor temperatures are also given. The work is established on several office buildings defined according to a typology built within the framework of a study on energy savings in air-conditioned office buildings in France.
The paper evaluates the potential work performance benefits of increased ventilation. We analysed the literature relating work performance with ventilation rate and employed statistical analyses. The studies included in the review assessed performance of various tasks in laboratory experiments and measured performance at work in real buildings. Almost all studies found increases in performance with higher ventilation rates. The studies indicated typically a 1-3 % improvement in average performance per 10 L/sperson increase in outdoor air ventilation rate.
This article presents the application of the zonal approach for modeling airflow and temperaturedistribution in Doube-Skin Facades (DSF). The airflow rate was calculated by using the power-lawmodel (PLM) and integral form of the energy equation was used to evaluate the temperaturedistribution. The predicted temperature distribution was compared/ verified using measured valuesand parametic studies were conducted to identify the influence of height, flowrate and pesence ofshading device on the temperature gradient in the cavity.
Login