LESODIAL

LESODIAL logo.

Gives architects relevant information regarding the use of daylight, at the very first stage of the design process. This software allows users to:

  • Calculate daylight factor values on the work plane.
  • Estimate daylighting autonomy (according to the lighting requirements, Leso-DIAL estimates the time during which artificial lighting could be switched off (mid-Europe climate).
  • Optimise the daylighting performance. Based on the use of fuzzy logic rules, the diagnosis facility of Leso-DIAL indicates out the possible weak points of your design.
  • Allows the user to compare his design with pre-simulated and/or existing real rooms stored in a database.
Up to 30 openings can be described (6 for each facade and the roof).

Keywords

Daylighting, early design stage, user-friendliness

Validation/Testing

N/A

Expertise Required

The use of this tool does not require any learning time and no specific knowledge is needed. A Lexicon is accessible from any stage of the design. About 100 terms of the lighting vocabulary are presented in a richly illustrated way.

Users

Architects & engineers offices, Universities (International)

Audience

Architects, engineers, students in architecture and building sciences

Input

Description of both photometry and geometry is based on the handling of graphic and linguistic items (precise numerical values may also be used).

Output

Daylighting performance (CIE overcast sky), daylight factor values on the workplane (isolines and tables), daylighting autonomy on the workplane (isolines and tables), and recommendations (linguistic diagnosis).

Computer Platform

PC-compatible, 386 or higher, Windows 3.1 or higher.

Programming Language

Asymetrix ToolBook

Strengths

Very easy description and use, fast calculation. Particularily well adapted to testing various configurations in the early design stages. English, French and German versions.

Weaknesses

Simplified calculation method (split-flux) dedicated for shoebox shape. Only one climate (mid-Europe) for the first version.

Contact

Company:

Solar Energy and Building Physics Laboratory

Address:

Swiss Federal Institute of Technology
LESO/EPFL
Lausanne CH-1015
Switzerland

Telephone:

+ 41 (21) 693 55 54

Facsimile:

+ 41 (21) 693 27 22

E-mail:

Bernard.Paule@epfl.ch

Website:

http://lesowww.epfl.ch/anglais/Leso_a_frame_sof.html

Availability

Site-license software packages for CHF 550.- purchased through LESO-EPFL at the above address. Check the WWW pages for additional information. 50% discount for education.