This paper presents a set of daylighting programs that can be run on a TI-59 hand calculator. The paper gives the program listings, the step-by-step procedures for using the programs, worksheets, and a worked sample problem.

The programs calculate interior horizontal illumination levels or daylight factors from a window. The user can specify the location of the calculation point, or, if a printer is available, the locations of a grid of points. Calculations can be performed for both CIE clear and overcast sky conditions.

The direct sky component calculation uses Riveros approximation for window transmission. The interreflected component calculation uses a split-flux approximation.

%I Lawrence Berkeley Laboratory %C Berkeley %P 27 %8 04/1981 %G eng %1Windows and Daylighting Group

%2 LBL-12248 %0 Conference Paper %B 6th National Passive Solar Conference %D 1981 %T The Use of Physical Scale Models for Daylighting Analysis %A Harvey J. Bryan %A Alexander Lohr %A R. Christophe Mathis %A James Rosen %XA process is described for determining the quantitative and qualitative features of a proposed daylighting design using physical scale models. The paper presents and discusses in detail several issues (i.e., modeling techniques, testing, measurement, visual analysis and photography) that must be resolved before physical scale modeling can be undertaken. Finally, a physical scale modeling case study is presented which illustrates many of the issues outlined as well as a photographic sequence of the physical scale modeling process.

%B 6th National Passive Solar Conference %C Portland, OR %P 865-869 %8 09/1981 %G eng %1Windows and Daylighting Group

%2 LBL-13305 %0 Journal Article %J Journal of the Illuminating Engineering Society %D 1980 %T Calculating Interior Daylight Illumination with a Programmable Hand Calculator %A Harvey J. Bryan %A Robert D. Clear %XA procedure is described for calculating interior daylight illumination using an inexpensive programmable hand calculator. The proposed procedure calculates illumination at any point within a room utilizing sky luminance distribution functions that are consistent with the CIE (Commission Internationale de lEclairage) Overcast and Clear Sky functions. This procedure separates the light reaching the point being considered into three components, these being (a) light directly from the sky, (b) light after being reflected from external, and (c) internal surfaces. Finally, two examples are presented in order to demonstrate the proposed procedure and indicate the speed with which the calculations may be performed.

%B Journal of the Illuminating Engineering Society %V 07/1981 %P 219-227 %G eng %L LBL-11687 %1Windows and Daylighting Group

%2 LBL-11687 %0 Conference Paper %B 5th National Passive Solar Conference %D 1980 %T A Procedure for Calculating Interior Daylight Ilumination %A Harvey J. Bryan %A Robert D. Clear %XA procedure is described for calculating interior daylight illumination using an inexpensive programmable hand calculator. The proposed procedure calculates illumination at any point within a room utilizing sky luminance distribution functions that are consistent with the CIE (Commission Internationale de l'Eclairage) Overcast and Clear Sky functions. This procedure separates the light reaching the point being considered into three components, these being (a) light directly from the sky, (b) light after being reflected from external, and (c) internal surfaces. Finally, two examples are presented in order to demonstrate the proposed procedure and indicate the speed with which the calculations may be performed.

%B 5th National Passive Solar Conference %C Amherst, MA %8 10/1980 %G eng %L LBL-11186 %1Windows and Daylighting Group

%2 LBL-11186 %0 Conference Paper %B Illuminating Engineering Society Annual Technical Conference %D 1979 %T A Simplified Procedure for Calculating the Effects of Daylight from Clear Skies %A Harvey J. Bryan %XA simplified procedure is described for calculating daylight illumination at any point within a room under clear sky conditions, which is consistent with the CIE recommended daylight factor method. The calculation procedure used here separates the light reaching the point being considered into three components; (1) light directly from the sky, (2) light after reflection from external, and (3) internal surfaces. Graphs and tables are developed for these components in order to evolve a calculation procedure which is simple to apply rather than lengthy direct computation from first principles. Finally, a validation case study is presented in order to demonstrate the accuracy of the proposed calculation procedure and to give readers a direct reference for future use.

%B Illuminating Engineering Society Annual Technical Conference %C Atlantic City, NJ %8 09/1979 %G eng %L LBL-9048 %1Windows and Daylighting Group

%2 LBL-9048