The first part of this article insists on the importance of a good ventilation system (polluted air exhaust, humidity, filtration, VOCs exhaust). The second part deals with a test house, equipped with either decentralized or centralized ventilation system. CO2 and ventilation rate measurements being compared, the validation of a model for the determination of the indoor CO2 concentration levels in one room of the house has been made.
This paper reports on an investigation of the adequacy of CFD for the predicting isothermal pollutant transport in a large indoor space with simple geometry, no furniture and no occupants. Agreement between predictions and experimental measurements was good.
In this paper a detailed scaling analysis of a water tank experiment designed to model a large indoor space is presented, along with experimental results obtained with this model to assess the influence of furniture and people in the pollutant concentration field at breathing height.
In this paper, different types of local housings have been classified (housing with two facades, housing with two facades in angle or in corner, housing with facade and interior patios, housing with an only facade, embedded housings, in several heights) with the aim of defining the natural ventilation's parameters for them. Then simulations can be made with the selected types along with the validation of results.
This paper proposes a new hybrid model for automatic diagnostics and optimal supervisory control. Detailed physical parameters represent half of the model and identified parameters describe another half. That hybrid model can be used to predict accurately the cooling and heating energy consumption of buildings in a wide range of operation conditions.
The potential of controlling techniques for an electrochromic device is investigated in a systematic way, using both experimental and theoretical tools. Concerning the theoretical part a model was developed in the TRNSYS environment and validated against experimental data. These data were collected from experiments, which were carried out in a PASSYS test cell with a movable wall. Having established a good model performance several cases of window types (such as a 4mm clear window and a low-e double glazing) and controlling strategies for the electrochromic device are simulated.
An energy balance over an urban area and over a rural one, reveals that the first case is always more complex than the last one. The urban context is able to change all the energy transferences mainly due to its own layout. Thus, analysing all the energy transferences one by one, we can find how they affect in a different way depending on the surroundings, among other influences.
The deposit of particles lower than 5µm diameter, depends on the airflow path within the room along with the strength of the ventilation.This parameter has to be taken into account to predict particle indoor air quality. For that study, a numerical model
A satisfying building commissioning depends on both using right models and using models right. Through 3 case studies, this paper shows how to use simulation models correctly, to commission HVAC systems.
This paper presents a tool for manual commissioning of air handling units with the idea to combine the measurements with simulations. Thus the value of the measurements will increase.
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