The project of CEN Standard from the Ventilation for dwellings group TC156/WG2/AH4 [1]for airflows calculations is being submitted to enquiry.This method can be easily compared to AIVC guides to calculate the ventilation airflow(natural or mechanical) in a given status. Yet, for energy loss estimation, these airflowscalculations must be done either hour per hour, either with average values andsimplifications.
Air change rates, indoor radon and carbon dioxide levels were monitored in a lecture theatre in the Hong Kong University of Science and Technology. Two preliminary measurements (Cases 1 and 2) and one series of demand control ventilation simulation (Case 3) were made to investigate the indoor air quality of the lecture theatre. Radon and carbon dioxide levels were found to be relatively high in Case 1 and later improved at the expense of operating the system catering for maximum occupancy in Case 2.
The improvement of air quality due to self-restricted air consumption in regions as well as globally appears to have considerable promise. Self-restriction means the normalised air (energy) consumption reasonable for favourable conditions of life and work. It will allow the use of the compensation concept when the consumption is higher than normal. This method enables us to select environment-friendly means of energy production as well as consumption taking into account the peculiarities of regions.
Field measurements were made during the heating season to compare IAQ between an air– conditioned building (Building A) and a naturally ventilated building (Building B) situated in the centre of Pyongyang and similar in architectural design, number of occ
The envelope as fictional building element acts as a filter intended to regulate energy andmass flows. The overall performance of the envelope is ascertained by the combined effects ofthe functional components. Thus a methodical approach is required for the comparativeappraisal of envelope alternatives in terms of multiple perfomance requirements andidentication of the best overall performer.
This project has studied a selection of 16 typical museums for antiquities in five Mediterranean countries and was partly funded by the JOULE III of the European Commission DG XII. Through an elaborate analysis and complete refurbishment of the Archaeological Museum of Delphi, the programme has provided an example for an innovative museum design based on present-day know-how.
The buoyant plume characteristics of heat sources and their relation to geometric factors are of fundamental importance to the effectiveness of the displacement ventilation. The interactions in buoyant plumes from an array of horizontal line heat sources are investigated systematically with Mach-Zehnder interferometer. Based on the discussion about convective flow patterns of a single lime heat source, the characteristic velocity and temperature to character the accumulating buoyancy effects of an array of horizontal line heat sources are proposed.
In this paper, we are particularly interested in the automatic generation of zonal model. We show how a. program can deduce with expert rules a partitioning suitable for the main driving flows encountered in the room under study and how appropriated local model are chosen and connected each other. To illustrate our purpose, we solve the case of a ventilated bi dimensional cavity.
Rating or ranking techniques are often used for checking compliance with regulations, evaluating the efficiency of a retrofit, or even labelling a building. However, the building is, in most cases, rated on very few parameters - when not only one - among many building qualities that should be taken into account. Within the frame of the Joule-Therrnie OFFICE project, a multicriteria ranking methodology, based on the ELECTRE family algorithms, is being developed.
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