LoginThe experiment shows that the temperature and velocity fields generated above a seated person are comparatively better approached by a thermal manikin rather than a cylindrical dummy.
Bibliographic database Airbase
AIRBASE is the Bibliographic Database of the AIVC. It contains publications and abstracts of articles related to energy efficient ventilation. Where possible, sufficient detail is supplied in the bibliographic details for users to trace and order the material via their own libraries. Topics include: ventilation strategies, design and retrofit methods, calculation techniques, standards and regulations, measurement methods, indoor air quality and energy implications etc. Entries are based on articles and reports published in journals, internal publications and research reports, produced both by university departments and by building research institutions throughout the world. AIRBASE has grown and evolved over many years (1979 to present day, over 22000 references and 16000 documents available online). For most of the references, the full document is also available online.
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This study presents a model to predict the time required by a pollutant to disperse in a room, due to the effects of room occupancy (a moving person enhances the mixing of pollutants).
Experiment and CFD simulation show the influence of moving person simulator (of cylinder shape) and thermal manikins on air distribution in ventilated rooms.
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.
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.
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.
16 segmental and all body heat transfer convective coefficients were determined in tests performed with a thermal mannequin placed in the test chamber of a large wind-tunnel.This paper presents a general table with the numerical coefficients of th
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 radiati
CFD is used to simulate the effects of respiration in displacement ventilated rooms.
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.
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
The authors introduce a new airflow characteristic, the equivalent frequency, as an integral measure for the frequency of the random velocity fluctuations in rooms.
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.
The study was carried out on 6 subjects. Each one is seated at a desk with a mounted PVS. During the experiment the room air temperature was controlled at 28C and the personalized air temperature was 25C.
This study is divided into 2 parts : 1. Discussion of the theory of a measurement method for configuration factors using reflections of a curvilinear mirror.2.
This study makes clear that mean skin temperature and skin wettedness do not remain constant but may vary under constant thermal sensations of "slightly warm", "warm" and "hot".
A seated, unclothed and bald manikin is used for the experiment. A numerical method calculates the view factors between individual segments of a thermal manikin , and between the outer surfaces and the body segments.
The author expresses the evaporative efficiency of sweating as a function of wetted skin surface area.This allows to predict mean skin temperature of human body as a function of 4 environmental factors and 2 human factors.
Influences of architectural parameters , solar heat gain of glazing envelopes, thermal inertia on opaque walls indoor air velocity and physiological parmeters has been taken in account to estimate indoor thermal comfort for occupants.
The paper describes the test procedure and sums up the criteria for the air handling components and systems defined in the Finnish guideline for ventilation equipment Test methods, such as a measuring method of mineral fibres released into airflo