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| Completed Projects and Presentations on IAQ: | ||||||||
| Airflow network model for contaminant dispersal analysis in buildings, (Engr. Joey Pastoril ; completed Sept. 2003).� The level of contamination inside a building is associated with the strength of indoor contaminant source and the level of outdoor pollution.� The contaminants are transported across and within the building by molecular diffusion and by macroscopic transport caused by air currents.� Because of this,� it is very important that the magnitudes of the different air flows inside a building have to �be determined. | ||||||||
| ����������� This study focuses on the development of an airflow network model that will predict the magnitude of air currents between different points in a building as a first step in a contaminant dispersal analysis of the building.� The model is based on fundamental principles of fluid mechanics and thermodynamics and uses the same approach as that of Walton and Axley.� The model is composed of a system of flow equations that allows the determination of airflow exchange in a network of rooms,� with the outdoor included as one node.� The model gives results in terms of volume flow rates and pressure difference between nodes in the network.� The difficulty in applying the model due to lack of information on the leakage characteristics of jalousie windows and lack of knowledge of the physics of airflow across a swinging door is well noted in the study.� | ||||||||
| Design of a displacement ventilation system for a VIP conference room, (Engr� Edgar Ambos; completed MEP thesis Sept. 2003).� Over the past 50 years, applications of displacement ventilation principle, - where cool air is slowly introduced at the floor and exhausted at the top, thus creating a clean zone at the lower part of the room and a dirty zone at the upper part, have been limited to large spaces or halls with high ceilings, low heat loads, and thick walls such as those in Scandinavian houses.� The application of the principle to small rooms with low ceilings, high heat loads, such as sunlit walls, is still very limited or if not doubtful because of the adverse effect of room height and heat load level on the clean zone height.� For health reasons, it is desirable for the height of the clean zone to be higher that the height of a person occupying the room, otherwise the occupant will be breathing polluted air from the upper part (or dirty zone) of the room.� | ||||||||
| ����������� The study explores the applicability of displacement principle to a VIP conference room in a Philippine setting. A displacement design methodology is developed, and using the height of ceiling and values of heat loads typical to conference rooms in Philippines a simulation was done to determine the clean zone height.� Results showed that the principle can be applied to conference rooms in the Philippines. | ||||||||