The effect of filtration on secondary organic aerosols (SOA) resulting from reactions between indoor limonene and ozone under a recirculation scenario, is examined in that paper. Three filter experiments were studied : new filter, used one and absence of filters in the air handling unit. Experimental procedure, results and conclusion are presented.
The chemical nature of the odorous compounds released from used ventilation filters has been investigated in that paper by simultaneous ordor evaluation and chemical analysis of air before and after the filters. The results are in adequation with the earliest authors' ones suggesting that aldehydes contribute to odor formation in ventilation filter.
This paper is a literature review of Indoor Air Quality provided by air conditioning systems with underfloor air distribution. Practically all the studies indicate UFAD systems really promote an improvement of IAQ. Despite this positive result, more detailed studies must be carried out to fill the lack of informationt about impact of new building materials, equipments and technologies on their occupants' health.
This report discusses the importance of airflow passing from a house into its pitch roof carrying heat and moisture. . For the prediction of the indoor airflow patterns, detailed tracer gas measurements and simulation tools (CFD) have been used. Methodology ,measurements and modeling are presented along with the results.
A method to develop HVAC equipment models with BMS data using RNN - recurrent neural networks - is proposed in this paper. The aim of the study is to define a non ad hoc technique in modeling, to acquire the possibility to tune equipement models automatically with computer in online as a result.
This study aims at developing a new ventilated window consisting in a triple glazing unit with dual airflow paths. The performance testing of such a system has been made possible thanks to CFD simulations. Some parametric studies have been conducted to identify the optimal values for the parameters in the window design,
Laboratory measurements of a ventilated ceiling in a mock-up kitchen are presented in that paper. The use of the capture jet concept improves significantly the contaminant removal efficiency in so far as the capture jet air is supplied horizontally across the ceiling and helps to direct heat and air contaminants towards the exhaust.
This paper presents first an overview on the current state of Demand Control Ventilation (DCV) technology for commercial buildings.Then it deals with the performance of existing systems - what is working well - with possible alternatives for the areas that need improvement.
That study whose aim was to determine mixing coefficients for a two-zone model of displacement ventilation was carried out in 43m2 model room equipped with various heat sources to create realistic convection air flows. The results and conclusions of modeling are presented.
A variety of typical air flow related problems in apartments such as air guiding, contaminant removal, draught problems are presented in this paper along with suggestions to solve those problems. CFD appears a valuable tool to obtain those solutions. Examples are given.
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