ventilation

A comfortable indoor climate environment is necessary for modern buildings and therefore the Heating, Ventilation and Air-Conditioning (HVAC) systems are widely used. Faults or disturbances are normally unavoidable in the systems and they will lead to more energy consumption or degradation of comfort level of indoor climate. Energy consumption is useful to detect the

The practical use of building simulation software requires a global and comprehensible interpretation of results for decision support in design. We propose a method in which the temperature of the free-running building is used to express: 1) the ratio between energy consumption for heating and cooling, 2) energy saved when ventilation is used instead of mechanical cooling, and 3) the degree of building adaptation to the environment.

Whole building simulation may play a key role in the optimization and assessment of the market potential of new building components. In the SOLVENT Project, ESP-r was used for such purposes, in the case applied to a new reversible ventilated window. The innovative character of the window required the development of a specific simulation approach within ESP-r, in order to account for buoyancy in the air channel. A multi-zone approach with an air flow network was developed, and several variations studied.

In the standard design process of a building, total building simulation using building simulation software is encouraged to be incorporated into the design process as early as possible. However, this paper demonstrates that building simulation can be used as late in the process as the early construction phase of a building project, though usually with increasing cost of building modifications.

The aim of the European SSHORT (Sustainable Social Housing Refurbishment Technologies) project is to increase and promote rational and efficient use of energy in the retrofitting of social housing buildings. In this scope, one step was to evaluate with simulation studies the technical and economical interest of selected sustainable technologies on standard collective social housings in participating countries.

The validation and development of turbulence models are still important issues related to Computational Fluid Dynamics for ventilation purposes. The present work continues the work initiated by (Voigt, 2002). Four turbulence models are reviewed, the k-e model, the k-w model and two blending models combining the k-e and the k-w model. The reason for testing the blending

The authors have developed a tool called SimSPARK able to automatically build dynamic zonal simulations of a building zone. In that study, SimSPARK architecture is described in details along with the current zonal model library. The applicability of this tool is also illustrated with the comparison of their zonal model in a ventilated room composed of 27 zones, with others models that don't include adsorption and desorption processes.

Occupant responsive optimal control is developed for so called smart façade systems. The control optimizes the performance of the system by rotating a motorized louver slat in the cavity and ventilation dampers at the top and bottom of exterior and interi

This paper is a review and an exploration of the literature on indoor air quality in schools and the reported health problems related to it.The aim of that review was to identify health symptoms the most commonly reported in schools ;then to sum-up the existing measurement data on ventilation rate, CO2 concentrations and VOCs and biological contaminants in schools ; then sto um-up the information that exists on causal relationship between pollutant exposures and health symptoms in shools.

Turbine ventilator is an equipment that uses natural wind force to exhaust airflow ; such ventilators are widely installed in Taiwan to enhance building and factories ventilation. In theory, the combination of turbine ventilator with natural ventilation improves the indoor air quality while it decreases the reliance on air-conditioning. So that allows a reduction of the energy consumption.A variety of tests on different types of ventilators was conducted. The results proved it is helpful to increase ventilation with the installation of ventilators.