Description |
39 pages : illustrations ; 25 cm + plastic shadow-angle protractor in back pocket |
Series |
Bulletin ; 8 |
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Bulletin (National Building Technology Centre (Australia)) ; 8
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Summary |
Passive design to minimise heat load in summer and optimise sun-trapping in winter has become a major feature of architectural design in Australia. Such designs maximise comfort and minimise the requirements for energy use in heating and cooling. It is necessary to determine the distribution of sunlight and shadow in order to estimate: (a) the extent to which the building can be self-shading; (b) the penetration of sunshine through windows into rooms; (c) the influence of shadows cast by adjacent buildings; and (d) the affect of shading devices on windows. The angles at which the sun's rays will affect a building are most easily studied on conventional plan, elevation, and sectional views of the building. For this purpose shadow angles are used. These angles are formed by projecting the directions of the sun's rays on to the horizontal plane for plans and on to the vertical plane for elevation and sectional views. As such, shadow angles differ from altitude and azimuth angles which are normally given to specify the position of the sun with respect to an observer on the earth. The solar charts at the end of this bulletin are intended as aids for the designer to easily determine the angles at which the sun's rays will fall on different places, seasons and times of day. A protractor on the inside of the back cover permits shadow angles to be read from the charts. To be able to do this it is first necessary to determine: (a) the latitude of the building site; (b) the season of the year; (c) the time of the day; and (d) the orientation of any existing building. Chapter 1 explains the influence that these factors exert and the technical terms that are used. The use of the solar charts and protractor to determine shadow angles is discussed in Chapter 2 and examples of the application of shadow angles are given. Appendix B contains a summarised procedure for using the solar charts to obtain values of shadow angles immediately.000000 |
Notes |
Transparent "shadow-angle protractor" in pocket |
Issuing Body |
At head of title: National Building Technology Centre |
Subject |
Architecture and climate -- Oceania.
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Architecture and solar radiation -- Australasia.
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Architecture and solar radiation -- Australia.
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Architecture and solar radiation -- Oceania -- Handbooks, manuals, etc.
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Architecture and solar radiation -- Oceania.
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Light in architecture.
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Shades and shadows.
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Sunshine -- Australasia -- Charts, diagrams, etc.
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Sunshine -- Australasia.
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Sunshine -- Oceania.
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Sunshine.
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Genre/Form |
Graphs.
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Author |
National Building Technology Centre (Australia)
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ISBN |
064450451X (paperback) |
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