A multi-lamp heliodon for architectural schools
Citation
International journal on architectural science, v.1, no.1, 2000, pp. 46-58
Abstract
Heliodons have been developed to simulate sunlight direction in relation to a building model. For placing the building model, heliodons can be divided into two categories. In one category, the model is to be tilted, and normally also rotated [1,2,3]. In the other category, the model is to be placed horizontally, and normally also stationary [4,5,6].
The later category of heliodons, with a horizontally placed building model, and with the simulated sunlight moving around it, will certainly help architectural students visualise the change of sunlight direction around a building and the related effect on insolation and shading.
Furthermore, in both categories, there are heliodons developed [7,8] to examine annual insolation/shading on massing models, by putting red, green, blue lamps (i.e. dichromatic lamps) respectively at positions for June, September/ March, December, thus improving the capability of the heliodons.
In the pursuit of a heliodon capable of demonstrating solar movement, offering the speed of operation as demanded by architectural schools, and occupying a space generally affordable, and primarily suitable for use to test buildings of the climatic region of South China where Hong Kong is located, a multi-lamp heliodon has been developed.
This paper reports on this multi-lamp heliodon, which consists of 69 fixed quartz lamps, and 6 dichromatic lamps. It also has the capability of investigating the building model with dichromatic lamps, without the demand of additional space which is always a concern now in architectural schools.
(1) Introduction
(2) Simulating the "suns" in the heliodon - the two existing light troughs
(3) Simulating the "suns" in the heliodon - the three new lamp holding rods with 69 quartz lamps
(4) The three new lamp holding rods- operation speed and teaching of solar geometry for 3 selected hours of apparent solar time
(5) Simulating the "suns" in the heliodon using dichromatic lamps - refitting the two existing light troughs with dichromatic lamps
(6) The three new lamp holding rods - operation in other moments of apparent solar time
(7) Adaptation of the heliodon for operating in other latitudes and other moments of time - a brief discussion only
(8) Conclusion
(9) Nomenclature
(10) References
(11) Appendices
(a) Appendix A - calculations for fig.1
(b) Appendix B - calculations for fig.2
(c) Appendix C - calculations for fig.7 and table 1, on the relationship among the locations of the lamps, the reference centre of the equipment, and solar declination angle
Description
Subject
Type
Article
Format
Date
2000
Language
en