Journal of the Human-Environment System
Online ISSN : 1349-7723
Print ISSN : 1345-1324
ISSN-L : 1345-1324
Volume 5 , Issue 2
Showing 1-5 articles out of 5 articles from the selected issue
JHES5-2
  • Diotima von Kempski
    2002 Volume 5 Issue 2 Pages 61-68
    Published: 2002
    Released: June 05, 2013
    JOURNAL FREE ACCESS
    The impact of indoor air quality on the well-being and comfort of a building’s occupants are key to creating an indoor environment which increases human performance. To date, efforts to improve indoor air quality have focused on creating thermal comfort and on developingtechnical means of reducing odor pollution. However, it has not yet been possible to translate these efforts into a corresponding improvement in the “dissatisfaction level” expressed by building occupants. Conventional approaches are bound to remain incomplete because they fail to take account of physiological and psychological effects of the sense of smell. Acceptable indoor air quality can only be achieved if the reduction in air pollution is combined with the addition of natural olfactory stimulants with suf cient positive attributes. Indoor air will only be perceived as acceptable if olfactory criteria are taken into consideration in addition to the traditional criteria of thermal comfort. Furthermore, it is necessary to set high standards for the use of the olfactory stimulants which are addedto the indoor air. There are a number of speci c requirements for the selection and dispersion of these substances.
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  • C. A. Wilson, R. M. Laing, D. J. Carr
    2002 Volume 5 Issue 2 Pages 69-77
    Published: 2002
    Released: June 05, 2013
    JOURNAL FREE ACCESS
    The aim of this review is to examine the contribution which air makes to the overall thermal resistance of garments (primarily) when in use. Issues related to i) air contained in fabrics, between fabric layers, between fabrics and the body, ii) garment design and the presence and effectiveness of closures and vents, and iii) the effects of wind and body movement are addressed. How these issues are affected by changes to body position, movement of air within the garment microclimate and exchange of the garment microclimate air with ambient air are also discussed. Indicators of a change in thermal resistance have generally been restricted to a change in microclimate air movement or to a change in energy required to maintain a thermal plate/manikin at a fixed temperature.
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  • Z. J. Kang, H. Xue, T. Y. Bong
    2002 Volume 5 Issue 2 Pages 79-86
    Published: 2002
    Released: June 05, 2013
    JOURNAL FREE ACCESS
    A numerical approach for local analysis of Wet Bulb Globe Temperature (WBGT) index in an occupied rectangular space is presented in this paper. Mechanical ventilation is considered for the crowded space. A CFD air ow model coupled with a multi-segment human thermoregulation model is employed to simulate the basic environmental parameters with having regard to the heat rejection from the occupants. An iterative algorithm is established for indoor WBGT estimation. 3-D distribution of the WBGT index is thus predicted based on the simulation results of the coupling model of air ow and occupants. 3-D WBGT analysis can be useful in local thermal stress assessment for individual occupants, as well as helpful in evaluating and designing HVAC systems for built environments.
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  • Akira Gassho, Akihiro Tamura, Naoki Matsubara, Yoshihito Kurazumi
    2002 Volume 5 Issue 2 Pages 87-94
    Published: 2002
    Released: June 05, 2013
    JOURNAL FREE ACCESS
    This paper discussed the construct of evaluation in a combined environment of visual and auditory stimuli. In particular, we pointed out the relationship between a harmonious sensation of the two stimuli and comprehensive comfortableness. Ten subjects were asked to rate the image of twenty scenes on slides and sounds. In Experiment 1, they rated the individual image of each stimulus and in Experiment 2, they rated the combined image of the scene and sound. As a result of the experiments it became clear that the effect of a harmonious sensation on comprehensive comfortableness is not direct, but works indirectly through the evaluations “Calming” or “Pleasant.” This indirect evaluation mechanism changes according to comfortableness of the combined stimuli. In a combination in which both stimuli are felt to be uncomfortable, although the stimuli are in harmony with each other, they are not felt to be “Calming” or “Pleasant,” and therefore the comprehensive comfortableness is not high. On the other hand, when a comfortable stimulus is included, or when there is a great difference between the visual comfortableness and the auditory comfortableness, the harmony of the scene and sound caused the “Calmness” or “Pleasantness,” and these combined stimuli are felt to be comfortable.
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  • Ramiz Kameel, Essam E. Khalil
    2002 Volume 5 Issue 2 Pages 95-110
    Published: 2002
    Released: June 05, 2013
    JOURNAL FREE ACCESS
    The recent advances in numerical methods and the vast development of computers had directed the designers to better development and modi cations to air ow pattern in air-conditioned rooms′ design. Extensive efforts are exerted to adequately predict the air velocity and turbulence intensity distributions in the room and to reduce the energy requirements and noise abatement to ultimately produce quite and energy efficient air conditioning systems. The present work fosters mathematical modeling techniques to primarily predict what happens in the air-conditioned surgical operating theatre in terms of flow regimes, heat transfer and interactions. The present work also demonstrates the effect of surgical operating theatre design and operational parameters on performance and heat transfer under various operating parameters. The governing equations of mass, momentum and energy are commonly expressed in a present finite difference form with source terms to represent pressure gradients, turbulence, viscous action, and heat transfer. A full three-dimensional computational schemes, 3DHVAC, was developed and used to predict the flow regimes and heat transfer characteristics. The flow regimes and heat transfer plays an important role in the efficiency and utilization of energy. Such behavior was found to be strongly dependent on turbulent shear, mixing, blockages, furniture orientation, wall conditions, and location of supply and return grilles.
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