For that study , an heated manikin, in a seated position, is exposed to a local thermo ventilator that promotes a non-uniform horizontal flow ( front , behind and right side) ; an interior climate analyser measures the environmental variables around the manikin. Those data are used as inputs of the numerical program.
A numerical model simulates the human and clothing thermal systems and evaluates the thermal comfort level. Verification was made that when the ventilator is places in front of the manikin, acceptable thermal comfort conditions are fullfilled.
This paper reports a large-scale investigation result on seat occupancy rate in a typical Japan office with 240 workers. The experiment lasted 3 months. The sensing device continuously recorded the seating status for about one week for each working person. From these results , a practical use situation of the personal air-conditioning system in the office could be predicted.
The aim of that study is to make a database of the local convective heat transfer coefficients for each part of a human body in sedentary and standing environments through the use of an experimental thermal manikin and an analysis of the radiative heat transfer rate. The results are applicable to both indoor and outdoor environments.
The paper also discusses the influences of wind velocity, sensible heat loss, posture and furniture arrangements on local convective heat transfer coefficients values.
This paper investigates the possibilities to create velocity variations of that type : (change from "low" to "high" velocity and then back "low" velocity again) in a whole room using standard velocity components. The results show large differences at individual points, but the mean value of all 8 positions in the room shows an expected behaviour.
This paper proposes a simple mathematical model for calculation of the convective air flow rate induced by humans. That model has been then compared to a more complex one and to experimental data with satisfactory results.
By means of CFD, the results of that study express a significant influence of Computer Simulated Person geometry on local flow pattern and on personal exposure to contaminants released from the floor surface.
The velocity field in circular ducts has been measured downstream 8 representative disturbances (elbows, junctions, damper, ...). The uncertainty in flow rate calculation has been defined.
The paper deals with air flow visualisation using fog generators. This technique has been applied to show air jets boundaries in several cases, in order to design flow generating equipment in industrial buildings.
In the light of difficulties associated with giving up smoking, which is the most effective strategy for household members to adopt to reduce children’s exposure to environmental tobacco smoke (ETS) in the home, an evaluation has been undertaken of other
For that study, 40 subjects were exposed to controlled air movements ( slightly cool, neutral, slightly warm thermal sensations at 18 °C, 20°C, 23°C, 26°C and 28°C). Their responses were collected. Results indicate that air movement preference depends on
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