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Daylight illuminance modelling for the United Kingdom and Europe.

Angus, Roderick Charles (1995) Daylight illuminance modelling for the United Kingdom and Europe. PhD thesis, Edinburgh Napier University.

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    Abstract/Description

    This thesis highlights the benefits to occupants and owners of buildings who utilise
    daylight effectively. Many cases of absence are related to depression or Seasonal
    Adjustment Disorder(SAD) which results from inadequate exposure to daylight in the
    work place. The use of artificial lights has been linked to minor as well as more serious
    ailments such as cancer and increases in cases of miscarriage.
    The use of daylight in buildings from economic and environmental perspectives is the
    main concern of the thesis. The work and analysis of this thesis have produced two new
    illuminance models. In addition detailed illuminance and irradiance data for Central
    Scotland were recorded which has previously not been available.
    A comprehensive study of luminous efficacy research was undertaken in Chapter 3 which
    evaluated a complete range of models. Furthermore the luminous efficacy of various UK
    and international sites were compared to examine climatic differences. The development
    of a new slope illuminance model which more accurately predicts external illuminance for
    all sky conditions was shown to perform consistently better than previous models. This
    was due to the new model's treatment of the sky background diffuse component utilising
    an anisotropic form as opposed to the traditional assumption of an isotropic sky
    background diffuse component.
    The availability of sky luminance distribution data from introduction of sky scanners
    enabled innovative daylight illuminance factors to be developed. These factors model the
    distribution of the sky's hemisphere under all levels of cloud cover and calculate the
    internal illuminance taking into account window size, glazing type, orientation and time
    of the day. The development of the daylight illuminance factors has been shown to
    significantly improve the energy efficient design of buildings in comparison to the current
    practice of employing the sky factor method.
    The daylight illuminance factors were used in a modelled building design scenario to
    assess their performance and to examine energy efficient design. Lighting controls and
    various glazing types were analysed to study their impact on a buildings energy
    consumption. This study also incorporated an embodied energy analysis which
    considered the energy consumption of windows in manufacture and operation.

    Item Type: Thesis (PhD)
    Uncontrolled Keywords: daylight; Seasonal Adjustment Disorder; environmental concerns; illuminance models; irradiance; luminous efficacy; anisotropic; sky luminance;
    University Divisions/Research Centres: Faculty of Engineering, Computing and Creative Industries > School of Engineering and the Built Environment
    Dewey Decimal Subjects: 700 Arts & recreation > 720 Architecture > 720 Architecture
    Library of Congress Subjects: N Fine Arts > NA Architecture
    Item ID: 3712
    Depositing User: Mrs Lyn Gibson
    Date Deposited: 18 Mar 2010 13:43
    Last Modified: 12 Jan 2011 04:55
    URI: http://researchrepository.napier.ac.uk/id/eprint/3712

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